Scholars@Duke
Glenn Michael Preminger

Glenn Michael Preminger

James F. Glenn, M.D. Distinguished Professor of Urology
Urology
glenn.preminger@duke.edu
Box 3167 Med Ctr, Durham, NC
30 Duke Medicine Circle, RM1573 Duke South, White Zone, Durham, NC 27710
Office hours Mondays 8:30 -  4:00

Wednesdays 8:30 - 2:00  

Scholarly Works - Journal articles

A Prospective Study of Steerable Ureteroscopic Renal Evacuation Using the Second-Generation CVAC® Aspiration System: Results from the CLEARANCE Study.

Journal article J Endourol · April 2026 PURPOSE: To evaluate the safety and effectiveness of the second-generation CVAC® Aspiration System. METHODS: A prospective study of steerable ureteroscopic renal evacuation using the second-generation CVAC was performed. Stone clearance (percent stone volu ... Full text Link to item Cite

Residual Stone Volume Predicts Health Care Consumption and Stone Events: Analysis of Two-Year Results of the ASPIRE Study.

Journal article J Endourol · March 2026 PURPOSE: The ASPiration to Improve Renal Calculi Removal Effectiveness study showed steerable ureteroscopic renal evacuation (SURE) with CVAC that significantly reduced residual stone volume at 30 days vs standard ureteroscopy (URS). This report presents 2 ... Full text Link to item Cite

Thermal injury and treatment efficiency during thulium fiber laser lithotripsy: insights from an in vivo porcine model.

Journal article World J Urol · January 11, 2026 PURPOSE: To evaluate the risk of thermal injury and the treatment efficiency during thulium fiber laser (TFL) lithotripsy of renal and ureteral stone phantoms in an in vivo porcine model. METHODS: BegoStone phantoms were sequentially implanted and treated ... Full text Link to item Cite

Infection Risk in Patients with Mixed Flora in Urine Cultures Prior to Ureteroscopy.

Journal article J Endourol · August 2025 Purpose: Urine cultures are routinely used to inform preoperative antibiotic choice and duration prior to endourologic surgery. The presence of mixed flora in preoperative urine cultures holds unclear clinical significance. This study examines infectious o ... Full text Link to item Cite

Optimizing Fragmentation while Minimizing Thermal Injury Risk with the Thulium Fiber Laser in Ureteral Stone Lithotripsy: An In Vitro Study.

Journal article J Endourol · July 2025 Objective: To optimize thulium fiber laser (TFL) settings for effective stone fragmentation although minimizing thermal injury in confined ureteral spaces using a three-dimensional ureter model. Materials and Methods: A hydrogel-based ureter model was main ... Full text Link to item Cite

The Role of Sleep Apnea in Postoperative Neurocognitive Disorders Among Older Noncardiac Surgery Patients: A Prospective Cohort Study.

Journal article Anesth Analg · January 1, 2025 BACKGROUND: Obstructive sleep apnea is associated with increased dementia risk, yet its role in postoperative neurocognitive disorders is unclear. Here, we studied whether the severity of untreated obstructive sleep apnea is associated with the severity of ... Full text Open Access Link to item Cite

A Prospective, Randomized, Noninferiority Study to Evaluate the Safety and Effectiveness of Steerable Ureteroscopic Renal Evacuation Compared with Standard Ureteroscopy: 30-Day Results of the ASPIRE Study.

Journal article J Endourol · January 2025 Purpose: We report the first multicenter, prospective, randomized noninferiority controlled trial of steerable ureteroscopic renal evacuation (SURE) for nephrolithiasis treatment. Materials and Methods: Candidates for laser lithotripsy ≥18 years with ≥1 re ... Full text Link to item Cite

Nephrolithiasis on the National Stage: The Kidney Stones of President Lyndon B. Johnson.

Journal article Urology · December 2024 Lyndon Baines Johnson, the 36th president of the United States, was troubled with kidney stones for most of his adult life. Three times during his political career, he required either endoscopic or open surgical removal of stones. This review will highligh ... Full text Link to item Cite

International Alliance of Urolithiasis (IAU) consensus on miniaturized percutaneous nephrolithotomy.

Journal article Mil Med Res · October 28, 2024 Over the past three decades, there has been increasing interest in miniaturized percutaneous nephrolithotomy (mPCNL) techniques featuring smaller tracts as they offer potential solutions to mitigate complications associated with standard PCNL (sPCNL). Howe ... Full text Link to item Cite

Editorial Comment.

Journal article J Urol · October 2024 Full text Link to item Cite

Editorial Comment.

Journal article J Urol · October 2024 Full text Link to item Cite

The Impact of Single-Use Cystoscopes on Clinical Time Workflow in an Outpatient Setting.

Journal article Urology · June 2024 OBJECTIVE: To evaluate the change in overall clinical encounter time and clinical capacity after transitioning to single-use cystoscopes (Ambu A/S, Ballerup, Denmark) in an outpatient urology setting. METHODS: A single-institution prospective study in an o ... Full text Link to item Cite

The relationship between the force applied and perceived by the surgeon during ureteral access sheath placement: ex-vivo experimental model.

Journal article World J Urol · May 16, 2024 PURPOSE: To define a peak force of insertion (PFOI) threshold for ureteral damage during ureteral access sheath (UAS) placement on an experimental ureteral orifice model. METHODS: A specially designed water tank using 2 laparoscopic 5 mm ports and 2 differ ... Full text Link to item Cite

Exploring optimal settings for safe and effective thulium fibre laser lithotripsy in a kidney model.

Journal article BJU Int · February 2024 OBJECTIVES: To explore the optimal laser settings and treatment strategies for thulium fibre laser (TFL) lithotripsy, namely, those with the highest treatment efficiency, lowest thermal injury risk, and shortest procedure time. MATERIALS AND METHODS: An in ... Full text Open Access Link to item Cite

International Alliance of Urolithiasis (IAU) guideline on retrograde intrarenal surgery (Russian adaptation)

Journal article Vestnik Urologii Urology Herald · January 1, 2024 Introduction. The emergence of new scientific and clinical evidence on the use of retrograde intrarenal surgery (RIRS) for the management of kidney stones has prompted periodic systematisation, analysis, and evaluation of outcomes to standardise its applic ... Full text Cite

In vitro investigation of stone ablation efficiency, char formation, spark generation, and damage mechanism produced by thulium fiber laser.

Journal article Urolithiasis · November 2, 2023 To investigate stone ablation characteristics of thulium fiber laser (TFL), BegoStone phantoms were spot-treated in water at various fiber tip-to-stone standoff distances (SDs, 0.5 ~ 2 mm) over a broad range of pulse energy (Ep, 0.2 ~ 2 J), frequency (F, 5 ... Full text Open Access Link to item Cite

In Pursuit of the Optimal Dusting Settings with the Thulium Fiber Laser: An In Vitro Assessment.

Journal article J Endourol · August 2023 Objective: Low energy and high frequency settings are used in stone dusting for holmium lasers. Such settings may not be optimal for thulium fiber laser (TFL). With the seemingly endless combination of settings, we aim to provide guidance to the practicing ... Full text Link to item Cite

Initial Longitudinal Outcomes of Risk-Stratified Men in Their Forties Screened for Prostate Cancer Following Implementation of a Baseline Prostate-Specific Antigen.

Journal article World J Mens Health · July 2023 PURPOSE: Prostate cancer (PCa) screening can lead to potential over-diagnosis/over-treatment of indolent cancers. There is a need to optimize practices to better risk-stratify patients. We examined initial longitudinal outcomes of mid-life men with an elev ... Full text Link to item Cite

International Alliance of Urolithiasis Guideline on Shockwave Lithotripsy.

Journal article Eur Urol Focus · May 2023 Different international associations have proposed their own guidelines on urolithiasis. However, the focus is primarily on an overview of the principles of urolithiasis management rather than step-by-step technical details for the procedure. The Internati ... Full text Link to item Cite

International Alliance of Urolithiasis guideline on retrograde intrarenal surgery.

Journal article BJU Int · February 2023 OBJECTIVES: To set out the second in a series of guidelines on the treatment of urolithiasis by the International Alliance of Urolithiasis that concerns retrograde intrarenal surgery (RIRS), with the aim of providing a clinical framework for urologists per ... Full text Link to item Cite

Benchtop Evaluation of Miniature Percutaneous Nephrolithotomy Lithotrites.

Journal article J Endourol · November 2022 Introduction: Percutaneous nephrolithotomy (PCNL) is the preferred treatment for kidney stones >2 cm. While PCNL has traditionally been performed using 24F to 30F access sheaths, there is a trend toward smaller sheaths and scopes to perform mini-PCNL (mPCN ... Full text Link to item Cite

European Association of Urology Section of Urolithiasis and International Alliance of Urolithiasis Joint Consensus on Retrograde Intrarenal Surgery for the Management of Renal Stones.

Journal article Eur Urol Focus · September 2022 BACKGROUND: Retrograde intrarenal surgery (RIRS) has become the preferred treatment modality for nephrolithiasis. However, because of ongoing uncertainties regarding the optimal perioperative management, operative technique, and postoperative follow-up, as ... Full text Link to item Cite

Initial Safety and Feasibility of Steerable Ureteroscopic Renal Evacuation: A Novel Approach for the Treatment of Urolithiasis.

Journal article J Endourol · September 2022 Background: There is a need to reliably render urolithiasis patients completely stone free with minimal morbidity. We report on the initial safety and feasibility with steerable ureteroscopic renal evacuation (SURE) in a prospective study using basket extr ... Full text Link to item Cite

Cavitation Plays a Vital Role in Stone Dusting During Short Pulse Holmium:YAG Laser Lithotripsy.

Journal article J Endourol · May 2022 Objective: To investigate the mechanism of stone dusting in Holmium (Ho): YAG laser lithotripsy (LL). Materials and Methods: Cylindrical BegoStone samples (6 × 6 mm, H × D) were treated in water using a clinical Ho:YAG laser lithotripter in dusting mode (0 ... Full text Link to item Cite

Postoperative changes in cognition and cerebrospinal fluid neurodegenerative disease biomarkers.

Journal article Ann Clin Transl Neurol · February 2022 OBJECTIVE: Numerous investigators have theorized that postoperative changes in Alzheimer's disease neuropathology may underlie postoperative neurocognitive disorders. Thus, we determined the relationship between postoperative changes in cognition and cereb ... Full text Open Access Link to item Cite

Evolution of Single-Use Urologic Endoscopy: Benchtop and Initial Clinical Assessment of a New Single-Use Flexible Cystoscope.

Journal article J Endourol · January 2022 Introduction: Office cystoscopy is one of the most frequently performed procedures by a urologist. However, single-use cystoscopes remain quite undeveloped. Ambu® has developed single-use broncoscopes, rhinolaryngoscopes, and duodenoscopes. Recently, they ... Full text Link to item Cite

Comparison of Different Pulse Modulation Modes for Holmium:Yttrium-Aluminum-Garnet Laser Lithotripsy Ablation in a Benchtop Model.

Journal article J Endourol · January 2022 Introduction: Manipulation of Holmium:Yttrium-Aluminum-Garnet laser parameters such as pulse energy (PE), frequency, and duration can impact laser lithotripsy ablation efficiency. In 2017, Lumenis introduced Moses™ Technology, which uses pulse modulation t ... Full text Link to item Cite

Investigating Risk Factors for Urine Culture Contamination in Outpatient Clinics: A New Avenue for Diagnostic Stewardship.

Journal article Antimicrob Steward Healthc Epidemiol · 2022 Mixed flora in urine cultures usually occur due to pre-analytic contamination. In our outpatient urology clinic, we found a high prevalence of mixed flora (46.2%), which was associated with female sex and older age. Patient education did not impact the rat ... Full text Link to item Cite

Perioperative neurocognitive and functional neuroimaging trajectories in older APOE4 carriers compared with non-carriers: secondary analysis of a prospective cohort study.

Journal article Br J Anaesth · December 2021 BACKGROUND: Cognitive dysfunction after surgery is a major issue in older adults. Here, we determined the effect of APOE4 on perioperative neurocognitive function in older patients. METHODS: We enrolled 140 English-speaking patients ≥60 yr old scheduled fo ... Full text Open Access Link to item Cite

Evaluation of a Novel Single-Use Flexible Ureteroscope.

Journal article J Endourol · June 2021 Introduction: A novel single-use flexible ureteroscope promises the optical characteristics and maneuverability of a reusable fourth-generation flexible ureteroscope. In this study, the LithoVue Single-Use Digital flexible ureteroscope was directly compare ... Full text Link to item Cite

Benchtop Assessment of a New Single-Use Flexible Ureteroscope.

Journal article J Endourol · June 2021 Introduction: Single-use flexible ureteroscopes are an increasingly popular alternative to reusable ureteroscopes. In this study, we performed a benchtop examination of the physical and optical properties of the new Dornier Axis™ (Webling, Germany) single- ... Full text Link to item Cite

The Role of Cavitation in Energy Delivery and Stone Damage During Laser Lithotripsy.

Journal article J Endourol · June 2021 Purpose: Although cavitation during laser lithotripsy (LL) contributes to the Moses effect, the impact of cavitation on stone damage is less clear. Using different laser settings, we investigate the role of cavitation bubbles in energy delivery and stone d ... Full text Link to item Cite

Immunomodulatory lipid mediator profiling of cerebrospinal fluid following surgery in older adults.

Journal article Sci Rep · February 4, 2021 Arachidonic acid (AA), docosahexaenoic acid (DHA), and eicosapentaenoic acid (EPA) derived lipids play key roles in initiating and resolving inflammation. Neuro-inflammation is thought to play a causal role in perioperative neurocognitive disorders, yet th ... Full text Open Access Link to item Cite

Cerebrospinal Fluid Proteome Changes in Older Non-Cardiac Surgical Patients with Postoperative Cognitive Dysfunction.

Journal article J Alzheimers Dis · 2021 BACKGROUND: Postoperative cognitive dysfunction (POCD), a syndrome of cognitive deficits occurring 1-12 months after surgery primarily in older patients, is associated with poor postoperative outcomes. POCD is hypothesized to result from neuroinflammation; ... Full text Open Access Link to item Cite

Evaluation and Medical Management of Patients with Cystine Nephrolithiasis: A Consensus Statement.

Journal article J Endourol · November 2020 Purpose: Cystinuria is a genetic disorder with both autosomal recessive and incompletely dominant inheritance. The disorder disrupts cystine and other dibasic amino acid transport in proximal tubules of the kidney, resulting in recurrent kidney stone forma ... Full text Link to item Cite

Rising occurrence of hypocitraturia and hyperoxaluria associated with increasing prevalence of stone disease in calcium kidney stone formers.

Journal article Scand J Urol · October 2020 OBJECTIVE: To evaluate metabolic risk factors in calcium kidney stone formers from two different decades, comparing changes in metabolic profiles over time. METHODS: A retrospective analysis was performed of calcium kidney stone formers who underwent metab ... Full text Link to item Cite

Letter to the Editor-Reply.

Journal article Urology · September 2020 Full text Link to item Cite

Assessment of conservative dietary management as a method for normalization of 24-h urine pH in stone formers.

Journal article Urolithiasis · April 2020 Low urine pH is a metabolic risk factor for stone formation. While medical therapy is typically prescribed (as urinary alkalinization), patients typically prefer dietary modifications. We aimed to assess capacity to alter urine pH with dietary management a ... Full text Link to item Cite

Metabolic evaluation and medical management of staghorn calculi.

Journal article Asian J Urol · April 2020 Staghorn renal calculi are large renal calculi that occupy nearly the entirety of the renal collecting system. They may be composed of metabolic or infection stone types. They are often associated with specific metabolic defects. Infection stones are assoc ... Full text Open Access Link to item Cite

The MARBLE Study Protocol: Modulating ApoE Signaling to Reduce Brain Inflammation, DeLirium, and PostopErative Cognitive Dysfunction.

Journal article J Alzheimers Dis · 2020 BACKGROUND: Perioperative neurocognitive disorders (PND) are common complications in older adults associated with increased 1-year mortality and long-term cognitive decline. One risk factor for worsened long-term postoperative cognitive trajectory is the A ... Full text Open Access Link to item Cite

Flow Cytometry Characterization of Cerebrospinal Fluid Monocytes in Patients With Postoperative Cognitive Dysfunction: A Pilot Study.

Journal article Anesth Analg · November 2019 Animal models suggest postoperative cognitive dysfunction may be caused by brain monocyte influx. To study this in humans, we developed a flow cytometry panel to profile cerebrospinal fluid (CSF) samples collected before and after major noncardiac surgery ... Full text Open Access Link to item Cite

Holmium:Yttrium-Aluminum-Garnet Laser Pulse Type Affects Irrigation Temperatures in a Benchtop Ureteral Model.

Journal article J Endourol · November 2019 Introduction: MOSES™ technology is a holmium:yttrium-aluminum-garnet laser pulse mode shown to minimize stone retropulsion. This may facilitate lithotripsy at higher power settings. However, power and heat production are proportional, and temperatures capa ... Full text Link to item Cite

The Rise and Fall of High Temperatures During Ureteroscopic Holmium Laser Lithotripsy.

Journal article J Endourol · October 2019 Introduction: Temperatures over 43°C-the threshold for cellular injury-may be achieved during ureteroscopic holmium laser lithotripsy. The time to reach and subsequently clear high temperatures at variable laser power settings and irrigation pressures has ... Full text Link to item Cite

An in vitro evaluation of laser settings and location in the efficiency of the popcorn effect.

Journal article Urolithiasis · August 2019 To examine different locations and laser settings' effects on the efficiency of the "popcorn" method of laser lithotripsy, which consists of placing the laser in a group of small stones and firing continuously to break them into smaller particles. Pre-frag ... Full text Link to item Cite

Editorial Comment.

Journal article J Urol · July 2019 Full text Link to item Cite

The INTUIT Study: Investigating Neuroinflammation Underlying Postoperative Cognitive Dysfunction.

Journal article J Am Geriatr Soc · April 2019 BACKGROUND/OBJECTIVES: Every year, up to 40% of the more than 16 million older Americans who undergo anesthesia/surgery develop postoperative cognitive dysfunction (POCD) or delirium. Each of these distinct syndromes is associated with decreased quality of ... Full text Open Access Link to item Cite

Psychiatric Diagnoses and Other Factors Associated with Emergency Department Return within 30 Days of Ureteroscopy.

Journal article J Urol · March 2019 PURPOSE: Emergency department visits after ureteroscopy are costly and inconvenient. To better understand those at risk we aimed to identify patient demographic, medical and surgical factors associated with 30-day emergency department presentation followin ... Full text Link to item Cite

Avoiding a Lemon: Performance Consistency of Single-Use Ureteroscopes.

Journal article J Endourol · February 2019 INTRODUCTION AND OBJECTIVES: Single-use flexible ureteroscopes are increasingly popular because of high repair costs of reusable ureteroscopes. As new single-use ureteroscopes enter the market, the consistency of performance of these devices has been quest ... Full text Link to item Cite

Let's Get to the Point: Comparing Insertion Characteristics and Scope Damage of Flat-Tip and Ball-Tip Holmium Laser Fibers.

Journal article J Endourol · January 2019 INTRODUCTION: A ball-tip holmium laser fiber (TracTip; Boston Scientific) has been developed to theoretically reduce damaging friction forces generated within a ureteroscope working channel. We compared the insertional forces and damage with a ureteroscope ... Full text Link to item Cite

Dusting Efficiency of the Moses Holmium Laser: An Automated In Vitro Assessment.

Journal article J Endourol · December 2018 INTRODUCTION: Moses technology is a novel Holmium:YAG laser system designed to minimize stone retropulsion and improve stone ablation when the laser is not in direct contact with the stone. Our aim was to assess the efficiency of Moses technology relative ... Full text Link to item Cite

Disproportionate Use of Inpatient Care by Older Adults With Kidney Stones.

Journal article Urology · October 2018 OBJECTIVE: To describe variation in utilization and costs of inpatient care for patients with kidney stones, examining associations with older age. MATERIALS AND METHODS: Using the Nationwide Inpatient Sample we examined inpatient discharges with stone dia ... Full text Link to item Cite

Abdominal Radiography With Digital Tomosynthesis: An Alternative to Computed Tomography for Identification of Urinary Calculi?

Journal article Urology · October 2018 OBJECTIVE: To compare the accuracy of plain abdominal radiography (kidneys, ureter, and bladder [KUB]) with digital tomosynthesis (DT) to noncontrast computed tomography (NCCT), the gold standard imaging modality for urinary stones. Due to radiation and co ... Full text Link to item Cite

Antibiotic Utilization Before Endourological Surgery for Urolithiasis: Endourological Society Survey Results.

Journal article J Endourol · October 2018 INTRODUCTION: Ureteroscopy (URS) and percutaneous nephrolithotomy (PCNL) are common procedures performed to treat kidney stones. Despite advances in technology/technique, serious infectious complications can occur. To better understand the preoperative ant ... Full text Link to item Cite

Defining metabolic activity of nephrolithiasis - Appropriate evaluation and follow-up of stone formers.

Journal article Asian J Urol · October 2018 Considering the variation in metabolic evaluation and medical management of kidney stone disease, this consensus review was created to discuss the metabolic activity of nephrolithiasis, define the difference between single and recurrent stone formers, and ... Full text Open Access Link to item Cite

In Vitro Comparison of a Novel Single Probe Dual-Energy Lithotripter to Current Devices.

Journal article J Endourol · June 2018 PURPOSE: The LithoClast Trilogy is a novel single probe, dual-energy lithotripter with ultrasonic (US) vibration and electromagnetic impact forces. ShockPulse and LithoClast Select are existing lithotripters that also use a combination of US and mechanical ... Full text Link to item Cite

Technique of Percutaneous Nephrolithotomy.

Journal article J Endourol · May 2018 According to the latest American and European Urological Association guidelines, percutaneous nephrolithotomy (PNL) is the current gold standard treatment for patients presenting with symptomatic large or complex renal stones ≥2 cm. This review chapter and ... Full text Link to item Cite

Percutaneous nephrolithotomy: complications and how to deal with them.

Journal article Urolithiasis · February 2018 Percutaneous nephrolithotomy is a common surgical treatment for large and complex stones within the intrarenal collecting system. A wide variety of complications can result from this procedure, including bleeding, injury to surrounding structures, infectio ... Full text Link to item Cite

Effect of Laser Settings and Irrigation Rates on Ureteral Temperature During Holmium Laser Lithotripsy, an In Vitro Model.

Journal article J Endourol · January 2018 PURPOSE: Ureteroscopic laser lithotripsy requires irrigation for adequate visualization and temperature control during treatment of ureteral stones. However, there are little data on how different irrigation and laser settings affect the ureteral wall and ... Full text Link to item Cite

Next-Generation Single-Use Ureteroscopes: An In Vitro Comparison.

Journal article J Endourol · December 2017 INTRODUCTION: Single-use ureteroscopes have been gaining popularity in recent years. We compare the optics, deflection, and irrigation flow of two novel single-use flexible ureteroscopes-the YC-FR-A and the NeoFlex-with contemporary reusable and single-use ... Full text Link to item Cite

Randomized Controlled Trial Comparing Three Different Modalities of Lithotrites for Intracorporeal Lithotripsy in Percutaneous Nephrolithotomy.

Journal article J Endourol · November 2017 PURPOSE: To compare the efficiency (stone fragmentation and removal time) and complications of three models of intracorporeal lithotripters in percutaneous nephrolithotomy (PCNL). MATERIALS AND METHODS: Prospective, randomized controlled trial at nine cent ... Full text Link to item Cite

Antibiotic use and the prevention and management of infectious complications in stone disease.

Journal article World J Urol · September 2017 The importance of assessing perioperative urine/stone cultures and providing appropriate antibiotic prophylaxis prior to shock wave lithotripsy (SWL) or endoscopic intervention cannot be minimized. Urinary tract infection (UTI) is the most common complicat ... Full text Link to item Cite

Comparison of Radiation Exposure from Fixed Table Fluoroscopy to a Portable C-Arm During Ureteroscopy.

Journal article J Endourol · September 2017 INTRODUCTION: Current treatment practices within the field of endourology require the routine use of radiation exposure to provide adequate imaging during urologic procedures. One such procedure requiring repeated radiation exposure during treatment is ure ... Full text Link to item Cite

Obesity and metabolic stone disease.

Journal article Curr Opin Urol · September 2017 PURPOSE OF REVIEW: In this article, we aim to review the data regarding associations between obesity and nephrolithiasis to assist with workup and treatment of these intersecting disorders. As obesity has a multifactorial influence on the risk for urinary ... Full text Link to item Cite

Imaging Advances in Urolithiasis.

Journal article J Endourol · July 2017 The prevalence of urinary stones in the United States has been described as 1 in 11 persons reporting a history of stones. Imaging plays a crucial role in diagnosis, management, and follow-up for these patients and imaging technology over the last 100 year ... Full text Link to item Cite

Variable Pulse Duration From a New Holmium:YAG Laser: The Effect on Stone Comminution, Fiber Tip Degradation, and Retropulsion in a Dusting Model.

Journal article Urology · May 2017 OBJECTIVE: To more clearly define the efficiency and potential benefits of variable pulse-width laser technology for ureteroscopic lithotripsy, we performed comparative in vitro evaluations assessing stone comminution, laser fiber tip degradation, and ston ... Full text Link to item Cite

Comparison of Broad vs Narrow Focal Width Lithotripter Fields.

Journal article J Endourol · May 2017 OBJECTIVE: To investigate the impact of lithotripter focal width on stone fragmentation. MATERIALS AND METHODS: A modified reflector was used to reduce -6 dB beam size of the HM3 lithotripter, while increasing concomitantly peak pressure. Fragmentation in ... Full text Link to item Cite

ACR Appropriateness Criteria® Renal Transplant Dysfunction.

Journal article J Am Coll Radiol · May 2017 Renal transplantation is the treatment of choice in patients with end-stage renal disease because the 5-year survival rates range from 72% to 99%. Although graft survival has improved secondary to the introduction of newer immunosuppression drugs and the a ... Full text Link to item Cite

Should metabolic evaluation be performed in patients with struvite stones?

Journal article Urolithiasis · April 2017 Previous studies suggested that patients with pure struvite calculi rarely have underlying metabolic abnormalities. Therefore, most of these patients do not undergo metabolic studies. We report our experience with these patients and their response to direc ... Full text Link to item Cite

Intraoperative Frontal Alpha-Band Power Correlates with Preoperative Neurocognitive Function in Older Adults.

Journal article Front Syst Neurosci · 2017 Each year over 16 million older Americans undergo general anesthesia for surgery, and up to 40% develop postoperative delirium and/or cognitive dysfunction (POCD). Delirium and POCD are each associated with decreased quality of life, early retirement, incr ... Full text Open Access Link to item Cite

Subcapsular Splenic Urinoma and Splenorenal Fistula: A New Complication of Percutaneous Nephrolithotomy.

Journal article J Endourol Case Rep · 2017 Background: Splenic urinoma has not been previously reported as a complication of percutaneous nephrolithotomy (PNL). Case Presentation: A 46-year-old Caucasian male underwent PNL for two large left renal stones. Surgery was performed in prone split-leg po ... Full text Open Access Link to item Cite

Metabolic diagnosis and medical prevention of calcium nephrolithiasis and its systemic manifestations: a consensus statement.

Journal article J Nephrol · December 2016 BACKGROUND: Recently published guidelines on the medical management of renal stone disease did not address relevant topics in the field of idiopathic calcium nephrolithiasis, which are important also for clinical research. DESIGN: A steering committee iden ... Full text Open Access Link to item Cite

Comparison of the Nanopulse Lithotripter to the Holmium Laser: Stone Fragmentation Efficiency and Impact on Flexible Ureteroscope Deflection and Flow.

Journal article J Endourol · November 2016 INTRODUCTION: The Nanopulse Lithotripter (NPL; Lithotech Medical, Israel) is a novel intracorporeal device that uses a nanosecond duration electrical discharge through a reusable flexible coaxial probe to endoscopically fragment urinary stones. This device ... Full text Link to item Cite

Surgical Management of Stones: American Urological Association/Endourological Society Guideline, PART I.

Journal article J Urol · October 2016 PURPOSE: This Guideline is intended to provide a clinical framework for the surgical management of patients with kidney and/or ureteral stones. The summary presented herein represents Part I of the two-part series dedicated to Surgical Management of Stones ... Full text Link to item Cite

Surgical Management of Stones: American Urological Association/Endourological Society Guideline, PART II.

Journal article J Urol · October 2016 PURPOSE: This Guideline is intended to provide a clinical framework for the surgical management of patients with kidney and/or ureteral stones. The summary presented herein represents Part II of the two-part series dedicated to Surgical Management of Stone ... Full text Link to item Cite

Percutaneous Nephrolithotomy: Update, Trends, and Future Directions.

Journal article Eur Urol · August 2016 CONTEXT: Percutaneous nephrolithotomy (PCNL) is the surgical standard for treating large or complex renal stones. Since its inception, the technique of PCNL has undergone many modifications. OBJECTIVE: To perform a collaborative review on the latest eviden ... Full text Link to item Cite

Contemporary Management of Struvite Stones Using Combined Endourologic and Medical Treatment: Predictors of Unfavorable Clinical Outcome.

Journal article J Endourol · July 2016 BACKGROUND AND PURPOSE: Struvite stones have been associated with significant morbidity and mortality, yet there has not been a report on the medical management of struvite stones in almost 20 years. We report on the contemporary outcomes of the surgical a ... Full text Link to item Cite

ACR Appropriateness Criteria Renal Cell Carcinoma Staging.

Journal article J Am Coll Radiol · May 2016 Renal cell carcinoma accounts for 2%-3% of all visceral malignancies. Preoperative imaging can provide important staging and anatomic information to guide treatment decisions. Size of the primary tumor and degree of local invasion, such as involvement of p ... Full text Link to item Cite

Prevalence of Hyperoxaluria in Urinary Stone Formers: Chronological and Geographical Trends and a Literature Review.

Journal article J Endourol · April 2016 PURPOSE: To report chronological trends and geographical distributions related to the prevalence of hyperoxaluria in stone-forming patients. MATERIALS AND METHODS: We systematically reviewed the existing literature between 1982 and 2013 seeking studies tha ... Full text Link to item Cite

Digital Tomosynthesis: A Viable Alternative to Noncontrast Computed Tomography for the Follow-Up of Nephrolithiasis?

Journal article J Endourol · April 2016 OBJECTIVE: Digital tomosynthesis (DT) is a new X-ray-based imaging technique that allows image enhancement with minimal increase in radiation exposure. The purpose of this study was to compare DT with noncontrast computed tomography (NCCT) and to evaluate ... Full text Link to item Cite

Treatment Response in Patients with Stones, and Low Urinary pH and Hypocitraturia Stratified by Body Mass Index.

Journal article J Urol · March 2016 PURPOSE: Obesity has been shown to be a risk factor for kidney stone formation. Obesity leads to insulin resistance which subsequently leads to low urinary pH. Low urinary pH is typically treated with potassium citrate. We determined if the response to pot ... Full text Link to item Cite

Use of ureteral access sheaths in ureteroscopy.

Journal article Nat Rev Urol · March 2016 The ureteral access sheath (UAS) facilitates the use of flexible ureteroscopy, enabling improved minimally invasive management of complex upper urinary tract diseases. The UAS, which comes in a variety of diameters and lengths, is passed in a retrograde fa ... Full text Link to item Cite

Evaluation of Novel Ball-Tip Holmium Laser Fiber: Impact on Ureteroscope Performance and Fragmentation Efficiency.

Journal article J Endourol · February 2016 PURPOSE: A novel ball tip (BT) holmium laser fiber has recently been developed, which features a modified rounded tip. The modification is purported to aid in insertion and minimize damage to the ureteroscope working channel. We evaluated this laser fiber ... Full text Link to item Cite

Radiation Dosimetry for Ureteroscopy Patients: A Phantom Study Comparing the Standard and Obese Patient Models.

Journal article J Endourol · January 2016 PURPOSE: To determine the effect of obesity on radiation exposure during simulated ureteroscopy. METHODS: A validated anthropomorphic adult male phantom with a body mass index (BMI) of approximately 24 kg/m(2), was positioned to simulate ureteroscopy. Padd ... Full text Link to item Cite

Minimizing radiation exposure during percutaneous nephrolithotomy.

Journal article Minerva Urol Nefrol · December 2015 Given the recent trends in growing per capita radiation dose from medical sources, there have been increasing concerns over patient radiation exposure. Patients with kidney stones undergoing percutaneous nephrolithotomy (PNL) are at particular risk for hig ... Link to item Cite

Radiation Exposure during the Evaluation and Management of Nephrolithiasis.

Journal article J Urol · October 2015 PURPOSE: There is rising concern over the increasing amount of patient radiation exposure from diagnostic imaging and medical procedures. Patients with nephrolithiasis are at potentially significant risk for radiation exposure due to the need for imaging t ... Full text Link to item Cite

ACR Appropriateness Criteria indeterminate renal mass.

Journal article J Am Coll Radiol · April 2015 Renal masses are increasingly detected in asymptomatic individuals as incidental findings. An indeterminate renal mass is one that cannot be diagnosed confidently as benign or malignant at the time it is discovered. CT, ultrasonography, and MRI of renal ma ... Full text Link to item Cite

Shock wave lithotripsy: the new phoenix?

Journal article World J Urol · February 2015 INTRODUCTION: Following its introduction in 1980, shock wave lithotripsy (SWL) rapidly emerged as the first-line treatment for the majority of patients with urolithiasis. Millions of SWL therapies have since been performed worldwide, and nowadays, SWL stil ... Full text Link to item Cite

A prospective, multi-institutional study of flexible ureteroscopy for proximal ureteral stones smaller than 2 cm.

Journal article J Urol · January 2015 PURPOSE: Flexible ureteroscopy is rapidly becoming a first line therapy for many patients with renal and ureteral stones. However, current understanding of treatment outcomes in patients with isolated proximal ureteral stones is limited. Therefore, we perf ... Full text Link to item Cite

Combined Endoscopic and Percutaneous Retrieval of a Retained 4-Wire Ureteral Stone Basket.

Journal article J Endourol Case Rep · 2015 Complex endourologic procedures may require the use of a combined ureteroscopic and percutaneous approach. Endoscopic removal of a retained 4-wire ureteral stone basket is particularly complex, as broken tines can potentially injure the ureter if the baske ... Full text Open Access Link to item Cite

Clinical outcomes after ureteroscopic lithotripsy in patients who initially presented with urosepsis: matched pair comparison with elective ureteroscopy.

Journal article J Endourol · December 2014 BACKGROUND AND PURPOSE: The outcomes of ureteroscopy (URS) after urgent decompression and antibiotics for patients who initially present with urosepsis because of obstructive urolithiasis have not been previously evaluated. The aim of this study was to com ... Full text Link to item Cite

Does body mass index impact the outcomes of tubeless percutaneous nephrolithotomy?

Journal article BJU Int · September 2014 OBJECTIVE: To evaluate whether body mass index (BMI) has an impact on the outcomes of tubeless percutaneous nephrolithotomy (PCNL). PATIENTS AND METHODS: We retrospectively reviewed patients who underwent tubeless PCNL at our institution from 2006 to 2011. ... Full text Link to item Cite

ACR appropriateness criteria post-treatment follow-up of renal cell carcinoma.

Journal article J Am Coll Radiol · May 2014 Although localized renal cell carcinoma can be effectively treated by surgery or ablative therapies, local or distant metastatic recurrence after treatment is not uncommon. Because recurrent disease can be effectively treated, patient surveillance after tr ... Full text Link to item Cite

Improving the lens design and performance of a contemporary electromagnetic shock wave lithotripter.

Journal article Proc Natl Acad Sci U S A · April 1, 2014 The efficiency of shock wave lithotripsy (SWL), a noninvasive first-line therapy for millions of nephrolithiasis patients, has not improved substantially in the past two decades, especially in regard to stone clearance. Here, we report a new acoustic lens ... Full text Open Access Link to item Cite

The clinical research office of the endourological society ureteroscopy global study: indications, complications, and outcomes in 11,885 patients.

Journal article J Endourol · February 2014 PURPOSE: To assess the current indications for ureteroscopy (URS) treatment, outcome in terms of stone-free rate, and intra- and postoperative complications using the modified Clavien grading system. PATIENTS AND METHODS: The Clinical Research Office of th ... Full text Link to item Cite

As low as reasonably achievable: Methods for reducing radiation exposure during the management of renal and ureteral stones.

Journal article Indian J Urol · January 2014 Imaging for urolithiasis has evolved over the past 30 years. Currently, non-contrast computed tomography (NCCT) remains the first line imaging modality for the evaluation of patients with suspected urolithiasis. NCCT is a dominant source of ionizing radiat ... Full text Link to item Cite

Treatment efficacy and outcomes using a third generation shockwave lithotripter.

Journal article BJU Int · November 2013 OBJECTIVES: To evaluate the clinical efficiency of a third generation electromagnetic shock wave lithotripter, the Lithoskop(®) (Siemens, Erlangen, Germany), regarding outcomes, stone disintegration, retreatment and complication rates. To compare the resul ... Full text Link to item Cite

Radiation exposure in the follow-up of patients with urolithiasis comparing digital tomosynthesis, non-contrast CT, standard KUB, and IVU.

Journal article J Endourol · October 2013 OBJECTIVE: To compare the effective doses (EDs) associated with imaging modalities for follow-up of patients with urolithiasis, including stone protocol non-contrast computed tomography (NCCT), kidney, ureter, and bladder radiograph (KUB), intravenous urog ... Full text Link to item Cite

Emergent ureteric stent vs percutaneous nephrostomy for obstructive urolithiasis with sepsis: patterns of use and outcomes from a 15-year experience.

Journal article BJU Int · July 2013 OBJECTIVES: To characterize the use of emergent JJ ureteric stent placement and percutaneous nephrostomy (PCN) for patients with obstructive urolithiasis with sepsis, and to determine whether outcomes differ between the two treatment methods. PATIENTS AND ... Full text Link to item Cite

Imaging techniques for stone disease and methods for reducing radiation exposure.

Journal article Urol Clin North Am · February 2013 Imaging plays a critical role in the evaluation of patients with urolithiasis. It is essential for the diagnosis of stones and provides important information to aide in determining the appropriate treatment of renal or ureteral calculi. Imaging for urolith ... Full text Link to item Cite

In-vitro assessment of a new portable ballistic lithotripter with percutaneous and ureteroscopic models.

Journal article J Endourol · November 2012 BACKGROUND AND PURPOSE: The EMS Swiss LithoBreaker is a new, portable, electrokinetic lithotripter. We compared its tip velocity and displacement characteristics with a handheld, pneumatic lithotripter LMA StoneBreaker.™ We also evaluated fragmentation eff ... Full text Link to item Cite

Optical performance comparison of deflectable laparoscopes for laparoendoscopic single-site surgery.

Journal article J Endourol · October 2012 Featured Publication BACKGROUND AND PURPOSE: Flexible working angles and fine optical visualization are major requisite factors in performing laparoendoscopic single-site (LESS) urologic procedures. Multiple mechanical design approaches have been used to develop deflectable la ... Full text Link to item Cite

Laparoscopic anatrophic nephrolithotomy: developments of the technique in the era of minimally invasive surgery.

Journal article J Endourol · May 2012 BACKGROUND AND PURPOSE: The complete removal of the stone is the ultimate goal in management, a result that might not be attained even after several sessions of percutaneous nephrolithotomy (PCNL) and/or extracorporeal shockwave lithotripsy (SWL) and/or re ... Full text Link to item Cite

Organ-specific radiation dose rates and effective dose rates during percutaneous nephrolithotomy.

Journal article J Endourol · May 2012 Featured Publication BACKGROUND AND PURPOSE: Radiation exposure during medical procedures continues to be an increasing concern for physicians and patients. We determined organ-specific dose rates and calculated effective dose rates during right and left percutaneous nephrolit ... Full text Link to item Cite

2196 OBESITY TRIPLES THE RADIATION EXPOSURE OF STONE PROTOCOL CT

Journal article Journal of Urology · April 2012 Full text Cite

Contemporary management of ureteral stones.

Journal article Eur Urol · April 2012 Featured Publication CONTEXT: Ureteral calculi represent a common condition that urologists encounter in everyday practice. Several treatment options are available for calculi that do not pass spontaneously or are unlikely to do so. OBJECTIVE: In this nonsystematic review, we ... Full text Link to item Cite

Risk reduction strategy for radiation exposure during percutaneous nephrolithotomy.

Journal article Curr Opin Urol · March 2012 Featured Publication PURPOSE OF REVIEW: To discuss the risk of radiation exposure to patients with nephrolithiasis. To review the risk factors for increased radiation exposure to patients during percutaneous nephrolithotomy (PNL) from fluoroscopy. To review the techniques to r ... Full text Link to item Cite

Determination of patient radiation dose during ureteroscopic treatment of urolithiasis using a validated model.

Journal article J Urol · March 2012 Featured Publication PURPOSE: We measured organ specific radiation dose rates and determined effective dose rates during simulated ureteroscopy using a validated model. To calculate the effective dose, patients were exposed to ureteroscopic management of stones at our institut ... Full text Link to item Cite

A comparison of light spot hydrophone and fiber optic probe hydrophone for lithotripter field characterization.

Journal article Rev Sci Instrum · January 2012 The performance of a newly developed light spot hydrophone (LSHD) in lithotripter field characterization was compared to that of the fiber optic probe hydrophone (FOPH). Pressure waveforms produced by a stable electromagnetic shock wave source were measure ... Full text Link to item Cite

Kidney stones.

Journal article BMJ Clin Evid · November 10, 2011 Featured Publication INTRODUCTION: The age of peak incidence for stone disease is 20 to 40 years, although stones are seen in all age groups. There is a male to female ratio of 3:2. METHODS AND OUTCOMES: We conducted a systematic review and aimed to answer the following clinic ... Link to item Cite

The clinical research office of the endourological society audit committee.

Journal article J Endourol · November 2011 The Clinical Research Office of the Endourological Society (CROES) conducts large-scale, international, multicenter clinical trials in the field of endourology. One of the major challenges that these trials pose is to ensure that data collected remotely an ... Full text Link to item Cite

Defining hypercalciuria in nephrolithiasis.

Journal article Kidney Int · October 2011 The classic definition of hypercalciuria, an upper normal limit of 200  mg/day, is based on a constant diet restricted in calcium, sodium, and animal protein; however, random diet data challenge this. Here our retrospective study determined the validity of ... Full text Link to item Cite

Training in ureteroscopy: a critical appraisal of the literature.

Journal article BJU Int · September 2011 The aim of the present review was to study factors influencing training and the maintenance of skills in performing ureteroscopy (URS). We searched on the following keywords in the Medline, Embase and Cochrane databases: renal or ureteric stone; ureterosco ... Full text Link to item Cite

Optimization of treatment strategy used during shockwave lithotripsy to maximize stone fragmentation efficiency.

Journal article J Endourol · September 2011 BACKGROUND AND PURPOSE: Previous studies have demonstrated that treatment strategy plays a critical role in ensuring maximum stone fragmentation during shockwave lithotripsy (SWL). We aimed to develop an optimal treatment strategy in SWL to produce maximum ... Full text Open Access Link to item Cite

Pathologic evaluation of hemostatic agents in percutaneous nephrolithotomy tracts in a porcine model.

Journal article J Endourol · August 2011 BACKGROUND AND PURPOSE: Hemostatic agents have been suggested as an adjunct for tubeless percutaneous nephrolithotomy (PCNL). We pathologically evaluated the percutaneous tracts injected with the fibrin sealant (FS) Evicel and hemostatic gelatin matrix (HG ... Full text Link to item Cite

Practice variation in the surgical management of urinary lithiasis.

Journal article J Urol · July 2011 PURPOSE: Shock wave lithotripsy and ureteroscopy are highly effective treatments for urinary lithiasis. While stone size and location are primary determinants of therapy, little is known about other factors associated with treatment. We identified patient, ... Full text Link to item Cite

Results of a 5-year multicenter trial of a new generation cooled high energy transurethral microwave thermal therapy catheter for benign prostatic hyperplasia.

Journal article J Urol · May 2011 Featured Publication PURPOSE: We determined the safety, effectiveness and 5-year durability of the new generation, cooled, high energy microwave treatment Cooled ThermoCath® catheter with the Targis® cooled high energy transurethral microwave thermal therapy system by performi ... Full text Link to item Cite

Reduced radiation exposure with the use of an air retrograde pyelogram during fluoroscopic access for percutaneous nephrolithotomy.

Journal article J Endourol · April 2011 Featured Publication INTRODUCTION: Fluoroscopy with retrograde pyelogram is commonly used to obtain access for percutaneous nephrolithotomy (PNL). Our practice uses room air for retrograde identification of calyceal anatomy. Herein we explore whether an air pyelogram was assoc ... Full text Link to item Cite

Randomized controlled, multicentre clinical trial comparing a dual-probe ultrasonic lithotrite with a single-probe lithotrite for percutaneous nephrolithotomy.

Journal article BJU Int · March 2011 Featured Publication OBJECTIVES: • To compare the Cyberwand (Gyrus/ACMI, Southborough, MA, USA), a dual-probe ultrasonic lithotrite, with a single-probe ultrasonic lithotrite. • The Cyberwand incorporates coaxial high- and low-frequency ultrasonic probes that work synergistica ... Full text Link to item Cite

Modern applications of ureteroscopy for intrarenal stone disease.

Journal article Curr Opin Urol · March 2011 PURPOSE OF REVIEW: Ureteroscopy continues to improve as a method for management of intrarenal stone disease. The development of new technologies and enhanced application of existing therapies is expanding the indications of ureteroscopy for the management ... Full text Link to item Cite

Third prize: the role of endoscopic nephron-sparing surgery in the management of upper tract urothelial carcinoma.

Journal article J Endourol · March 2011 INTRODUCTION: Upper tract urothelial carcinoma (UT-UC) is an uncommon disease with pronounced difference in 5-year survival for noninvasive (96%) versus invasive (17%) disease. High survival rate of early disease questioned the accepted norm of using radic ... Full text Link to item Cite

Low dose computerized tomography for detection of urolithiasis--its effectiveness in the setting of the urology clinic.

Journal article J Urol · March 2011 Featured Publication PURPOSE: Low dose noncontrast computerized tomography is becoming a common imaging tool to diagnose urolithiasis. We investigated its usefulness as a diagnostic tool in the outpatient setting. MATERIALS AND METHODS: A total of 62 patients with suspected ur ... Full text Link to item Cite

The digital flexible ureteroscope: in vitro assessment of optical characteristics.

Journal article J Endourol · March 2011 INTRODUCTION: Recent advances in endoscope design have placed the charged coupled device chip on the tip of the endoscope. The image is instantly digitalized and converted into an electrical signal for transmission. Digital technology was first introduced ... Full text Link to item Cite

Demystifying the medical management of nephrolithiasis.

Journal article Rev Urol · 2011 Nephrolithiasis is a common problem associated with significant costs to the health care system. Its prevalence continues to increase, particularly in women, which is attributed to changes in diet and lifestyle. The costs associated with the evaluation and ... Link to item Cite

Factors affecting patient radiation exposure during percutaneous nephrolithotomy.

Journal article J Urol · December 2010 Featured Publication PURPOSE: We identified patient and stone characteristics that may contribute to increased radiation exposure during percutaneous nephrolithotomy and offer technique modifications to limit the radiation dose. MATERIAL AND METHODS: We reviewed the records of ... Full text Link to item Cite

In vivo determination of urinary stone composition using dual energy computerized tomography with advanced post-acquisition processing.

Journal article J Urol · December 2010 Featured Publication PURPOSE: We assessed whether dual energy computerized tomography with advanced post-image processing can accurately differentiate urinary calculi composition in vivo. MATERIALS AND METHODS: A total of 25 patients scheduled to undergo ureteroscopic/percutan ... Full text Link to item Cite

Tubeless percutaneous nephrolithotomy--the new standard of care?

Journal article J Urol · October 2010 Featured Publication PURPOSE: Traditionally the placement of a nephrostomy tube at the conclusion of percutaneous nephrolithotomy is considered the standard of care. However, the need for nephrostomy tube placement has been questioned by numerous authors. We evaluated the lite ... Full text Link to item Cite

A simple method for fabricating artificial kidney stones of different physical properties.

Journal article Urol Res · August 2010 Featured Publication A simple method for preparing artificial kidney stones with varying physical properties is described. BegoStone was prepared with a powder-to-water ratio ranging from 15:3 to 15:6. The acoustic properties of the phantoms were characterized using an ultraso ... Full text Link to item Cite

High burden and complex renal calculi: aggressive percutaneous nephrolithotomy versus multi-modal approaches.

Journal article Arch Ital Urol Androl · March 2010 Featured Publication INTRODUCTION: Percutaneous nephrolithotomy (PNL) remains the treatment of choice for managing patients with large or complex renal calculi, especially staghorn stones composed of struvite. Recent advances in the PNL technique appear to improve post-operati ... Link to item Cite

Stone forming risk factors in patients with type Ia glycogen storage disease.

Journal article J Urol · March 2010 Featured Publication PURPOSE: Patients with type Ia glycogen storage disease have an increased recurrent nephrolithiasis rate. We identified stone forming risk factors in patients with type Ia glycogen storage disease vs those in stone formers without the disease. MATERIALS AN ... Full text Link to item Cite

A novel drug eluting ureteral stent: a prospective, randomized, multicenter clinical trial to evaluate the safety and effectiveness of a ketorolac loaded ureteral stent.

Journal article J Urol · March 2010 Featured Publication PURPOSE: We evaluated the short-term safety and efficacy of a ketorolac loaded ureteral stent compared to a standard stent (control). MATERIALS AND METHODS: In this prospective, multicenter, double-blind study patients were randomized 1:1 to ketorolac load ... Full text Link to item Cite

Percutaneous nephrolithotomy: an extreme technical makeover for an old technique.

Journal article Arch Ital Urol Androl · March 2010 Featured Publication INTRODUCTION: Percutaneous nephrolithotomy (PNL) remains the treatment of choice for several forms of stone disease including: large stones, many cystine and struvite calculi, lower pole calyceal calculi, stones associated with anomalous renal anatomy, and ... Link to item Cite

Dual-energy computed tomography with advanced postimage acquisition data processing: improved determination of urinary stone composition.

Journal article J Endourol · March 2010 Featured Publication INTRODUCTION: The characterization of urinary calculi using noninvasive methods has the potential to affect clinical management. CT remains the gold standard for diagnosis of urinary calculi, but has not reliably differentiated varying stone compositions. ... Full text Open Access Link to item Cite

A composite kidney stone phantom with mechanical properties controllable over the range of human kidney stones.

Journal article J Mech Behav Biomed Mater · January 2010 A novel composite kidney stone phantom has been developed. This stone phantom is producible with mechanical properties mimicking the range of tensile fracture strength and acoustic properties of human kidney stones and is an inorganic/organic composite mat ... Full text Link to item Cite

Long-term results of percutaneous nephrolithotomy: does prophylactic medical stone management make a difference?

Journal article J Endourol · October 2009 Featured Publication It has been almost 30 years since the introduction of percutaneous nephrolithotomy (PCNL) as a safe, effective, and efficient method for large stone fragmentation and removal. While considered a highly effective technique, a surgical procedure alone cannot ... Full text Link to item Cite

Assessing the impact of ureteral stent design on patient comfort.

Journal article J Urol · June 2009 Featured Publication PURPOSE: We assessed the near term comfort of newly designed ureteral study stents or marketed control stents, including Polaris and Percuflex stents. Study stents had distal 6Fr pigtail ends with 3Fr or less loops. Decreased material in situ was hypothesi ... Full text Link to item Cite

NOTES: Education and training.

Journal article J Endourol · May 2009 The concept of minimally invasive surgery has gained widespread acceptance because of significant reduction in the patient postoperative morbidity that is associated with these surgical procedures. Natural orifice translumenal endoscopic surgery (NOTES) co ... Full text Link to item Cite

Renal stone assessment with dual-energy multidetector CT and advanced postprocessing techniques: improved characterization of renal stone composition--pilot study.

Journal article Radiology · March 2009 Featured Publication PURPOSE: To prospectively evaluate the capability of noninvasive, simultaneous dual-energy (DE) multidetector computed tomography (CT) to improve characterization of human renal calculi in an anthropomorphic DE renal phantom by introducing advanced postpro ... Full text Link to item Cite

Impact of long-term potassium citrate therapy on urinary profiles and recurrent stone formation.

Journal article J Urol · March 2009 Featured Publication PURPOSE: Potassium citrate therapy has become one of the cornerstones of medical stone management. We elucidated the long-term effects of potassium citrate on urinary metabolic profiles and its impact on stone formation rates. MATERIALS AND METHODS: We per ... Full text Link to item Cite

High definition laparoscopy: objective assessment of performance characteristics and comparison with standard laparoscopy.

Journal article J Endourol · March 2009 Featured Publication INTRODUCTION: High definition (HD) digital imaging represents a major advance in endoscope technology. The development of the charge-coupled device chip and its location at the distal end of the endoscope allows for image capture and digitization, as well ... Full text Link to item Cite

Evidence-based medicine training in residency: a survey of urology programme directors.

Journal article BJU Int · February 2009 OBJECTIVE: To investigate whether and in what format urology residents receive formal training in evidence-based clinical practice. METHODS: In 2007 we conducted a survey of the Accreditation Council for Graduate Medical Education (ACGME)-accredited urolog ... Full text Link to item Cite

Perceptions and competence in evidence-based medicine: a survey of the American Urological Association Membership.

Journal article J Urol · February 2009 PURPOSE: We investigated the attitudes and opinions of urologists toward evidence-based medicine to help guide future efforts of the American Urological Association and other organizations vested in the education and training of urologists. MATERIALS AND M ... Full text Link to item Cite

Radiation exposure in the acute and short-term management of urolithiasis at 2 academic centers.

Journal article J Urol · February 2009 Featured Publication PURPOSE: Diagnostic imaging has a central role in the evaluation and management of urolithiasis. A variety of modalities are available, each with benefits and limitations. Without careful consideration of imaging modalities in quantity and type patients ma ... Full text Link to item Cite

Adjuvant therapy after surgical stone management.

Journal article Adv Chronic Kidney Dis · January 2009 Featured Publication The aim of this article was to review the most widely researched adjuvant medical therapies for the surgical management of urolithiasis. Articles were identified and reviewed from PubMed and Medline databases with MeSH headings focusing on the various surg ... Full text Link to item Cite

Beyond prone position in percutaneous nephrolithotomy: a comprehensive review.

Journal article Eur Urol · December 2008 Featured Publication CONTEXT: Percutaneous nephrolithotomy (PNL) is traditionally performed with the patient in the prone position. OBJECTIVE: To assess the efficacy and safety of the prone and supine positions, particularly in obese patients and in those with staghorn calculi ... Full text Link to item Cite

Current management of ureteral calculi

Journal article European Urological Review · December 1, 2008 Cite

How to use a systematic literature review and meta-analysis.

Journal article J Urol · October 2008 PURPOSE: This article introduces practicing urologists to the critical appraisal of systematic reviews and meta-analyses to guide their evidence-based clinical practice. MATERIALS AND METHODS: Using a urological clinical case scenario we introduce a 3-step ... Full text Link to item Cite

Evaluating the evidence: statistical methods in randomized controlled trials in the urological literature.

Journal article J Urol · October 2008 PURPOSE: Randomized controlled trials potentially provide the highest level of evidence to inform clinical decision making. Appropriate use of statistical methods is a critical aspect of all clinical research, including randomized controlled trials. We rep ... Full text Link to item Cite

Oxalobacter formigenes may reduce the risk of calcium oxalate kidney stones.

Journal article J Am Soc Nephrol · June 2008 Featured Publication Most kidney stones are composed primarily of calcium oxalate. Oxalobacter formigenes is a Gram-negative, anaerobic bacterium that metabolizes oxalate in the intestinal tract and is present in a large proportion of the normal adult population. It was hypoth ... Full text Link to item Cite

Use of the Escape nitinol stone retrieval basket facilitates fragmentation and extraction of ureteral and renal calculi: a pilot study.

Journal article J Endourol · June 2008 Featured Publication BACKGROUND AND PURPOSE: Advances in ureteroscope and stone basket design have catapulted ureteroscopy to the forefront of surgical stone management; however, persistent problems such as stone migration continue to challenge urologists. The Escape nitinol s ... Full text Link to item Cite

Assessment of citrate concentrations in citrus fruit-based juices and beverages: implications for management of hypocitraturic nephrolithiasis.

Journal article J Endourol · June 2008 Featured Publication BACKGROUND AND PURPOSE: Dietary intake of citrate in the form of citrus juices (eg, lemonade, orange juice) will enhance urinary citrate excretion, a valuable benefit for patients with hypocitraturic calcium oxalate nephrolithiasis. While information on ci ... Full text Link to item Cite

Barriers to the practice of evidence-based urology.

Journal article J Urol · June 2008 PURPOSE: We investigated urologist perceptions of barriers to implementing evidence-based medicine in clinical practice. MATERIALS AND METHODS: In April 2005 an Internet survey was conducted to assess American Urological Association member attitudes toward ... Full text Link to item Cite

Comparison of a novel radially dilating balloon ureteral access sheath to a conventional sheath in the porcine model.

Journal article J Urol · May 2008 Featured Publication PURPOSE: Traditional ureteral access sheaths rely on tapered dilators and the Dotter principle of axial force to gain access into the ureter. We compared the performance of a novel balloon expandable ureteral access sheath using radial dilatation with that ... Full text Link to item Cite

Surgical simulation: a urological perspective.

Journal article J Urol · May 2008 PURPOSE: Surgical education is changing rapidly as several factors including budget constraints and medicolegal concerns limit opportunities for urological trainees. New methods of skills training such as low fidelity bench trainers and virtual reality sim ... Full text Link to item Cite

Efficacy of intravesical ropivacaine injection on urinary symptoms following ureteral stenting: a randomized, controlled study.

Journal article J Endourol · March 2008 Featured Publication PURPOSE: Previous studies suggest that intravesical administration of nonsteroidal anti-inflammatory drugs may reduce the troublesome voiding symptoms and pain related to ureteral stenting. The objective of this study was to investigate the effectiveness o ... Full text Link to item Cite

Ureteroscopic management of stones in anomalous kidneys.

Journal article Arch Ital Urol Androl · March 2008 Featured Publication Surgical management of stones in anomalous kidney presents a problem for urologic surgeons. Various minimally invasive management options have been previously reported including shock wave lithotripsy (SWL), percutanteous nephrolithitomy (PNL), as well as ... Link to item Cite

New ureteral stone guidelines reflect treatment changes

Journal article Urology Times · February 1, 2008 Cite

Ureteral stenting and urinary stone management: a systematic review.

Journal article J Urol · February 2008 PURPOSE: Ureteral stents are widely used in many urological procedures. We evaluated the recent literature, providing an update on materials and stent designs, and indications for stent placement and stent complications, including the management of such st ... Full text Link to item Cite

Urolithiasis: not just a 2-legged animal disease.

Journal article J Urol · January 2008 Featured Publication PURPOSE: In this systematic review we summarize information on animal models of stone formation, the similarities of stone formation between humans and nonhuman animals, and the management of naturally occurring stones in animals, particularly dogs and cat ... Full text Link to item Cite

Urinary reference values for stone risk factors in children.

Journal article J Urol · January 2008 PURPOSE: Reference values for stone risk factors in 24-hour urine samples for nonstone forming children are limited. We measured urinary stone risk factors in healthy children 3 to 18 years old, and sought to determine whether the risk factors are affected ... Full text Link to item Cite

2007 guideline for the management of ureteral calculi.

Journal article J Urol · December 2007 Featured Publication Full text Link to item Cite

Practice patterns of ureteral stenting after routine ureteroscopic stone surgery: a survey of practicing urologists.

Journal article J Endourol · November 2007 Featured Publication BACKGROUND: Controversy exists regarding the need for ureteral stent insertion after routine ureteroscopic stone surgery. We designed a questionnaire to assess and better understand the practice patterns of urologists for stent applications. MATERIALS AND ... Full text Link to item Cite

Levels of evidence in the urological literature.

Journal article J Urol · October 2007 PURPOSE: The concept of levels of evidence is one of the guiding principles of evidence based clinical practice. It is based on the understanding that certain study designs are more likely to be affected by bias than others. We provide an assessment of the ... Full text Link to item Cite

Shock wave lithotripsy or ureteroscopy for the management of proximal ureteral calculi: an old discussion revisited.

Journal article J Urol · October 2007 Featured Publication PURPOSE: The goal of treating ureteral calculi is to achieve complete stone clearance with minimal patient morbidity. Shock wave lithotripsy and ureteroscopy have become standards of care for ureteral calculi. However, the optimal choice of treatment depen ... Full text Link to item Cite

Evidence based clinical practice: a primer for urologists.

Journal article J Urol · September 2007 PURPOSE: Evidence based clinical practice has been defined as the conscientious, explicit and judicious use of the current best evidence in making decisions about the care of individual patients. It refers to a broad set of principles and methods intended ... Full text Link to item Cite

Subcutaneous bupivacaine infiltration and postoperative pain perception after percutaneous nephrolithotomy.

Journal article J Urol · September 2007 Featured Publication PURPOSE: Recent studies have shown a significant decrease in patient reported pain scores when the nephrostomy tube size is decreased from 22 to 10Fr. We hypothesize that patient reported pain and narcotic use could be further decreased for patients with p ... Full text Link to item Cite

Nephrolithiasis in identical twins: the impact of nature vs nurture.

Journal article BJU Int · September 2007 Featured Publication OBJECTIVE: To assess possible underlying metabolic abnormalities in three sets of monozygotic twins, to evaluate the interplay among the factors of kidney stone formation, a complex multifactorial process influenced by environmental, genetic and anatomical ... Full text Link to item Cite

New concepts in shock wave lithotripsy.

Journal article Urol Clin North Am · August 2007 This monograph reviews the basic principles of shock wave lithotripsy. The focus is on new research on stone fragmentation and tissue injury and how this improved understanding of shock-wave technology is leading to modifications in lithotripsy that will a ... Full text Link to item Cite

Holmium laser for stone management.

Journal article World J Urol · June 2007 Featured Publication The efficiency and safety profile of the holmium laser has made this tool a versatile multi-purpose instrument for use in the endoscopic treatment of a wide variety of urologic disorders, in particular urinary calculi. Herein we review holmium laser physic ... Full text Link to item Cite

Effect of medical management on recurrent stone formation following percutaneous nephrolithotomy.

Journal article J Urol · May 2007 Featured Publication PURPOSE: Percutaneous nephrolithotomy is a commonly used procedure for treatment of large or complex renal calculi. In some instances postoperative residual stone fragments are an unavoidable result. Yet to our knowledge no study has examined the impact of ... Full text Link to item Cite

The effect of frequency doubled double pulse Nd:YAG laser fiber proximity to the target stone on transient cavitation and acoustic emission.

Journal article J Urol · April 2007 Featured Publication PURPOSE: Scant information has been published describing the effect of laser fiber distance from the stone target on the mechanism of calculus fragmentation. Using high speed photography and acoustic emission measurements we characterized the impact of las ... Full text Link to item Cite

Changing gender prevalence of stone disease.

Journal article J Urol · March 2007 PURPOSE: Recent studies suggest that the incidence of renal stone formation has been increasing and the male predominance of nephrolithiasis is decreasing, which may be due to changes in diet and lifestyle. We examined changes in the prevalence by gender o ... Full text Link to item Cite

A critical assessment of the quality of reporting of randomized, controlled trials in the urology literature.

Journal article J Urol · March 2007 PURPOSE: Randomized, controlled trials are the gold standard for evidence based assessment of therapeutic interventions. In 1996 the Consolidated Standards of Reporting Trials statement was published in an effort to standardize the reporting of clinical tr ... Full text Link to item Cite

New concepts in shock wave lithotripsy

Journal article Urologic Clinics of North America · 2007 Cite

Renal stones

Journal article Contemporary Urology · December 1, 2006 Conservative and selective medical therapy of nephrolithiasis is highly effective in preventing new stone formation. An overall remission rate of greater than 80% and an overall reduction in individual stone formation rate of greater than 90% can be obtain ... Cite

Forced versus minimal intravenous hydration in the management of acute renal colic: a randomized trial.

Journal article J Endourol · October 2006 Featured Publication BACKGROUND AND PURPOSE: The management of acute renal colic is a problem commonly encountered by both urologists and emergency medicine physicians. The classic approach to managing uncomplicated acute renal colic involves hydration, along with imaging and ... Full text Link to item Cite

Progressive increase of lithotripter output produces better in-vivo stone comminution.

Journal article J Endourol · September 2006 BACKGROUND AND PURPOSE: Shockwave lithotripsy (SWL) has become a first-line intervention for treatment of nephrolithiasis. However, few studies have examined the effects of modifications in the method of shockwave energy administration on comminution effic ... Full text Link to item Cite

Evidence-based medicine: a survey of American Urological Association members.

Journal article J Urol · September 2006 PURPOSE: We investigated the attitudes and opinions of urologists toward evidence-based medicine. MATERIALS AND METHODS: In April of 2005 we contacted members of the American Urological Association listed with an e-mail address to participate in a web base ... Full text Link to item Cite

New technology for imaging and documenting urologic procedures.

Journal article Urol Clin North Am · August 2006 Recent advances in fiber optics and digital technology have dramatically improved the ability of the urologic surgeon to accurately image and document endoscopic and laparoscopic procedures. In addition, the development of digital endoscopes has expanded t ... Full text Link to item Cite

Metabolic abnormalities associated with calyceal diverticular stones.

Journal article BJU Int · May 2006 Featured Publication OBJECTIVE: To review the metabolic analyses of patients with calyceal diverticular stones who had surgical treatment of their calculi and to examine the effect of selective medical therapy on stone recurrence, as recent reports suggest that metabolic abnor ... Full text Link to item Cite

Use of Stone Cone minimizes stone migration during percutaneous nephrolithotomy.

Journal article Urology · May 2006 Featured Publication We describe a simple and effective method using the Stone Cone to prevent migration of stone fragments into the ureter during percutaneous nephrolithotomy. This maneuver may reduce the need for antegrade ureteroscopy to remove residual fragments, thereby s ... Full text Link to item Cite

Xanthine urolithiasis.

Journal article Urology · May 2006 Xanthine calculi are uncommonly encountered stones. When they occur, they typically do so in association with inborn metabolic disorders such as hereditary xanthinuria or Lesch-Nyhan syndrome. They may also occur in association with states of profound hype ... Full text Link to item Cite

Renal calculi presenting as hyperhidrosis in patient with spinal cord injury.

Journal article Urology · May 2006 Featured Publication Renal calculi in the spinal cord injury population present a diagnostic dilemma for urologists. However, 7% of all patients with spinal cord injury will develop renal calculi. Undiagnosed stone disease can lead to significant morbidity and mortality in thi ... Full text Link to item Cite

Management of lower pole renal calculi: shock wave lithotripsy versus percutaneous nephrolithotomy versus flexible ureteroscopy.

Journal article Urol Res · April 2006 Featured Publication Current ureteroscopic intracorporeal lithotripsy devices and stone retrieval technology allow for the treatment of calculi located throughout the intra-renal collecting system. Difficulty accessing lower pole calculi, especially when the holmium laser fibe ... Full text Link to item Cite

Citrate and vitamin E blunt the shock wave-induced free radical surge in an in vitro cell culture model.

Journal article Urol Res · December 2005 Free radical formation plays a major role in shock wave lithotripsy induced renal damage. Moreover, previous studies suggest that free radicals may also promote de novo calcium oxalate crystallization of previously damaged urothelium. Citrate is a known in ... Full text Link to item Cite

Local cost structures and the economics of robot assisted radical prostatectomy.

Journal article J Urol · December 2005 PURPOSE: Robot assisted prostatectomy (RAP) is more costly than traditional radical retropubic prostatectomy (RRP) under the cost structures at certain hospitals. However, this finding may not be the case in all care settings. We investigated the sensitivi ... Full text Link to item Cite

Simultaneous combined use of flexible ureteroscopy and percutaneous nephrolithotomy to reduce the number of access tracts in the management of complex renal calculi.

Journal article BJU Int · November 2005 OBJECTIVE: To present early experience in managing complex renal calculi using a combined ureteroscopic and percutaneous approach, as complex and branched renal calculi often require multiple access tracts during percutaneous nephrolithotomy (PNL), and the ... Full text Link to item Cite

Location and etiology of flexible and semirigid ureteroscope damage.

Journal article Urology · November 2005 OBJECTIVES: To perform an analysis of currently available manufacturer data regarding the character of ureteroscope damage. The high costs associated with the repair of flexible and semirigid ureteroscopes are well documented. Increased knowledge of the et ... Full text Link to item Cite

Controlled survival study of the effects of Tisseel or a combination of FloSeal and Tisseel on major vascular injury and major collecting-system injury during partial nephrectomy in a porcine model.

Journal article J Endourol · November 2005 PURPOSE: We report the results of a controlled survival study in a porcine model investigating Tisseel or a combination of FloSeal and Tisseel in dealing with vascular and collecting-system injury during partial nephrectomy. MATERIALS AND METHODS: We perfo ... Full text Link to item Cite

Long-term pegylated liposomal doxorubicin use in recurrent ovarian carcinoma.

Journal article J Natl Med Assoc · October 2005 BACKGROUND: Ovarian carcinoma is a devastating disease because patients are diagnosed with advanced disease at presentation and five-year survival ranges from 5-20%. Salvage therapy becomes important for survival in those patients with recurrent disease. T ... Link to item Cite

Clinical research and statistical methods in the urology literature.

Journal article J Urol · October 2005 PURPOSE: We provide a systematic assessment of the quality and accuracy of statistical reporting in the urology literature. MATERIALS AND METHODS: All original research publications with adult human subjects in a single issue (August 2004) of 4 leading uro ... Full text Link to item Cite

Effect of ureteral access sheath on stone-free rates in patients undergoing ureteroscopic management of renal calculi.

Journal article Urology · August 2005 OBJECTIVES: To evaluate the effect of ureteral access sheaths (UASs) on stone-free rates (SFRs) during ureteroscopic treatment of renal calculi. Several advantages of UASs during flexible ureteroscopy have been documented. However, no study has evaluated t ... Full text Link to item Cite

Ethnic background has minimal impact on the etiology of nephrolithiasis.

Journal article J Urol · June 2005 PURPOSE: Nephrolithiasis disproportionately affects white patients. However, recent studies propose an increase in the incidence of stone disease in nonwhite populations. We compared the metabolic risk factors of ethnically disparate stone formers from the ... Full text Link to item Cite

Prospective, randomized trial comparing shock wave lithotripsy and ureteroscopy for lower pole caliceal calculi 1 cm or less.

Journal article J Urol · June 2005 PURPOSE: The optimal management of lower pole renal calculi is controversial. We compared shock wave lithotripsy (SWL) and ureteroscopy (URS) for the treatment of patients with small lower pole stones in a prospective, randomized, multicenter trial. MATERI ... Full text Link to item Cite

In vitro comparison of stone retropulsion and fragmentation of the frequency doubled, double pulse nd:yag laser and the holmium:yag laser.

Journal article J Urol · May 2005 PURPOSE: The frequency doubled, double pulse Nd:YAG (FREDDY) laser (World of Medicine, Berlin, Germany) functions through the generation of a plasma bubble. Upon bubble collapse a mechanical shock wave is generated, causing stone fragmentation. This mechan ... Full text Link to item Cite

Acute kidney transplant failure following transurethral bladder polyp fulguration.

Journal article J Natl Med Assoc · March 2005 Ureteral obstruction and anastomotic leak represent the most common urologic complications of kidney transplantation. Delay in diagnosis or treatment can lead to allograft loss. Obstruction of the ureter occurs in 2% of kidney transplant recipients. Althou ... Link to item Cite

Ureteroscopic management of renal calculi in anomalous kidneys.

Journal article Urology · February 2005 OBJECTIVES: To review our experience with ureteroscopy in treating patients with renal calculi in anomalous kidneys and to evaluate the efficacy of this approach. METHODS: Eight patients with renal calculi in anomalous kidneys who were managed by ureterosc ... Full text Link to item Cite

PlasmaKinetic bipolar vessel sealing: burst pressures and thermal spread in an animal model.

Journal article J Endourol · 2005 BACKGROUND AND PURPOSE: Laparoscopic bipolar instruments are commonly employed to cauterize and divide tissue. A next-generation bipolar device has been developed that employs vapor pulse coagulation energy. We assessed the vessel-sealing capability of thi ... Full text Link to item Cite

Medical treatment: Worthwhile and when?

Journal article EAU Update Series · January 1, 2005 The incidence of nephrolithiasis in industrialized countries is 0.5% to 1% annually. Stone formers subsequently face recurrence rates of 50% over 5 years. Annual costs in the United States for evaluation and treatment have been estimated at $1.83 billion U ... Full text Cite

Editorial comment

Journal article Journal of Urology · January 1, 2005 Full text Cite

Hand-assisted laparoscopic nephrectomy: the transfer of experience to a new academic center.

Journal article J Endourol · November 2004 BACKGROUND AND PURPOSE: Hand-assisted laparoscopic nephrectomy (HALN) has become widely used for the management of localized renal masses and for simple nephrectomy [corrected] Centers of excellence have slowly disseminated this surgical approach throughou ... Full text Link to item Cite

Hand-assisted laparoscopic partial nephrectomy without hilar vascular clamping using a saline-cooled, high-density monopolar radiofrequency device.

Journal article J Endourol · November 2004 BACKGROUND AND PURPOSE: Nephron-sparing surgery is now accepted as an alternative treatment option for small renal tumors. However, hemostasis during laparoscopic partial nephrectomy can be technically challenging, especially without hilar vascular clampin ... Full text Link to item Cite

Hand-Assisted Laparoscopic Nephrectomy for Inflammatory Renal Conditions

Journal article Journal of Endourology · October 1, 2004 Full text Cite

Hand-assisted laparoscopic nephrectomy for inflammatory renal conditions.

Journal article J Endourol · October 2004 PURPOSE: Laparoscopic surgery for large renal lesion or kidneys with chronic inflammation has proved to be technically challenging. Hand-assisted laparoscopic surgery might be useful in these complex cases, as it provides surgeons the benefits of tactile f ... Full text Link to item Cite

In vitro comparison of fragmentation efficiency of flexible pneumatic lithotripsy using 2 flexible ureteroscopes.

Journal article J Urol · September 2004 PURPOSE: Pneumatic lithotripsy has been shown to be an effective and safe intracorporeal lithotripsy modality for renal and ureteral calculi, capable of fragmenting stones of all compositions. We determined the in vitro stone fragmentation abilities of the ... Full text Link to item Cite

Hand-assisted laparoscopic heminephrectomy in horseshoe kidney.

Journal article J Endourol · August 2004 BACKGROUND AND PURPOSE: Horseshoe kidneys are the most common renal fusion anomalies. In surgery on normal kidneys, the use of minimally invasive techniques has decreased morbidity and improved postoperative care. However, aberrant vasculature, abnormal ki ... Full text Link to item Cite

Management of nephropleural fistula after supracostal percutaneous nephrolithotomy.

Journal article Urology · August 2004 OBJECTIVES: Access to complex urinary tract pathology may require supracostal access placing patients at risk for intrathoracic complications. Our objective was to retrospectively review our experience with percutaneous renal surgery with a particular emph ... Full text Link to item Cite

Metabolic risk factors and the impact of medical therapy on the management of nephrolithiasis in obese patients.

Journal article J Urol · July 2004 PURPOSE: Previous studies have demonstrated that obesity can increase the risk of stone formation as well as recurrence rates of stone disease. Yet appropriate medical management can significantly decrease the risk of recurrent stone disease. Therefore, we ... Full text Link to item Cite

The effect of treatment strategy on stone comminution efficiency in shock wave lithotripsy.

Journal article J Urol · July 2004 PURPOSE: The comminution of kidney stones in shock wave lithotripsy (SWL) is a dose dependent process caused primarily by the combination of 2 fundamental mechanisms, namely stress waves and cavitation. The effect of treatment strategy with emphasis on enh ... Full text Link to item Cite

Hand assisted laparoscopic training for postgraduate urologists: the role of mentoring.

Journal article J Urol · July 2004 PURPOSE: Hand assisted laparoscopy (HAL) has recently been accepted as a safe alternative for nephrectomy. HAL courses have been offered at several institutions to train novice laparoscopic surgeons in this minimally invasive surgical procedure. Mentoring ... Full text Link to item Cite

Internet based multi-institutional clinical research: a convenient and secure option.

Journal article J Urol · May 2004 PURPOSE: As randomized, prospective trials have become an integral part of clinical research, multi-institutional, collaborative research has become a necessity. However, it may be cumbersome for participants at remote facilities to participate because the ... Full text Link to item Cite

The use of chemical treatments for improved comminution of artificial stones.

Journal article J Urol · May 2004 PURPOSE: The acoustic and mechanical properties of various stone compositions are significantly different and thus result in varying degrees of fragility. Consequently, results to shock wave lithotripsy (SWL) are influenced accordingly. We report the resul ... Full text Link to item Cite

Reduction of tissue injury in shock-wave lithotripsy by using an acoustic diode.

Journal article Ultrasound Med Biol · May 2004 An acoustic diode (AD) was constructed of two acoustic transparent membranes with good initial contact to allow the transmission of the positive pressure of lithotripter shock wave at an almost unaltered level, yet attenuate significantly its negative pres ... Full text Link to item Cite

Advances in the surgical management of nephrolithiasis.

Journal article Minerva Urol Nefrol · March 2004 The surgical management of urinary calculus disease has undergone a dramatic evolution over the past 2 decades. Twenty years ago, open surgical procedures for urinary calculi were some of the most frequently performed urologic procedures. Since then, howev ... Link to item Cite

Metabolic abnormalities associated with renal calculi in patients with horseshoe kidneys.

Journal article J Endourol · March 2004 BACKGROUND AND PURPOSE: Horseshoe kidneys are a complex anatomic variant of fused kidneys, with a 20% reported incidence of associated calculi. Anatomic causes such as high insertion of the ureter on the renal pelvis and obstruction of the ureteropelvic ju ... Full text Link to item Cite

Advanced imaging in stone management.

Journal article Curr Opin Urol · March 2004 PURPOSE OF REVIEW: Stone disease continues to plague humankind. Recent innovations in minimally invasive surgery, however, have decreased morbidity for the treatment of lithiasis, once only amenable to open surgical techniques. These advances in stone mana ... Full text Link to item Cite

Bilateral renal calculi: assessment of staged v synchronous percutaneous nephrolithotomy.

Journal article J Endourol · March 2004 BACKGROUND AND PURPOSE: Percutaneous stone removal has replaced open renal surgery and has become the treatment of choice for large or complex renal calculi. However, patients with large bilateral stone burdens still present a challenge. Simultaneous bilat ... Full text Link to item Cite

Advances in video and imaging in ureteroscopy.

Journal article Urol Clin North Am · February 2004 Advances in image processing and display technologies, such as digital imaging, HDTV, and virtual reality, will ultimately allow integration of endoscopic imaging with diagnosis and therapy during ureteroscopic procedures. Further improvements in simulatio ... Full text Link to item Cite

Ureteral access sheath provides protection against elevated renal pressures during routine flexible ureteroscopic stone manipulation.

Journal article J Endourol · February 2004 BACKGROUND AND PURPOSE: New-generation flexible ureteroscopes allow the management of proximal ureteral and intrarenal pathology with high success rates, including complete removal of ureteral and renal calculi. One problem is that the irrigation pressures ... Full text Link to item Cite

Evaluation of synchronous twin pulse technique for shock wave lithotripsy: determination of optimal parameters for in vitro stone fragmentation.

Journal article J Urol · December 2003 PURPOSE: The Twinheads extracorporeal shock wave lithotriptor (THSWL) is composed of 2 identical shock wave generators and reflectors. One reflector is under the table and the other is over the table with a variable angle between the axes of the 2 reflecto ... Full text Link to item Cite

Determining the incidence of horseshoe kidney from radiographic data at a single institution.

Journal article J Urol · November 2003 PURPOSE: An estimated 150,000 children are born with birth defects each year. One of the most frequent genitourinary abnormalities is horseshoe kidney (HSK). The incidence of HSK in the population is estimated to be 1/400 to 1,600 births based on autopsy d ... Full text Link to item Cite

Pain after percutaneous nephrolithotomy: impact of nephrostomy tube size.

Journal article J Endourol · August 2003 BACKGROUND AND PURPOSE: Percutaneous nephrolithotomy (PCNL) is the procedure of choice for managing large renal calculi. Investigations have recently focused on reducing the morbidity of the procedure and improving postoperative patient comfort by using sm ... Full text Link to item Cite

Percutaneous management of calculi within horseshoe kidneys.

Journal article J Urol · July 2003 PURPOSE: Percutaneous treatment of patients with calculi in a horseshoe kidney can be challenging due to the altered anatomical relationship in the retroperitoneum. Therefore, we performed a multi-institutional review to assess the safety and efficacy of t ... Full text Link to item Cite

Use of a temporary ureteral drainage stent after uncomplicated ureteroscopy: results from a phase II clinical trial.

Journal article J Urol · May 2003 PURPOSE: An indwelling ureteral stent is commonly placed for 48 hours after uncomplicated ureteroscopy to maintain drainage and prevent postoperative complications. A propriety temporary ureteral drainage stent (TUDS, Boston Scientific/Microvasive, Natick, ... Full text Link to item Cite

Use of bipolar laparoscopic forceps to occlude and transect the retroperitoneal vasculature: a porcine model.

Journal article J Endourol · April 2003 BACKGROUND AND PURPOSE: Surgical clips are commonly employed during laparoscopic radical nephrectomy to ligate perihilar vessels reliably, yet these clips can interfere with the application of a vascular stapler to major vessels, potentially leading to cat ... Full text Link to item Cite

In vitro analysis of stone fragmentation ability of the FREDDY laser.

Journal article J Endourol · April 2003 BACKGROUND AND PURPOSE: The Frequency-Doubled Double-Pulse Nd:Yag) (FREDDY) laser (World of Medicine, Berlin Germany) is a short-pulsed, double-frequency solid-state laser with wavelengths of 532 and 1064 nm. This low-power, low-cost laser was developed fo ... Full text Link to item Cite

Shock wave lithotripsy causes ipsilateral renal injury remote from the focal point: the role of regional vasoconstriction.

Journal article J Urol · April 2003 PURPOSE: Shock wave lithotripsy induced renal damage can occur as a result of multiple mechanisms, including small vessel injury and free radical production. Previous studies have demonstrated that shock wave lithotripsy exerts a regional change in renal h ... Full text Link to item Cite

Clinical efficacy of a combination pneumatic and ultrasonic lithotrite.

Journal article J Urol · April 2003 PURPOSE: A new combination pneumatic/ultrasonic intracorporeal lithotriptor has been developed for percutaneous applications. It combines the stone clearing efficiency of an ultrasonic device with the fragmentation strength of a pneumatic probe into a sing ... Full text Link to item Cite

Ureteral access sheath facilitates inspection of incision of ureteropelvic junction.

Journal article J Urol · March 2003 PURPOSE: The Acucise (Applied Medical, Rancho Santa Margarita, California) electrocautery balloon is a highly successful device used in managing congenital and secondary ureteropelvic junction obstruction. Correct orientation of the cutting wire is essenti ... Full text Link to item Cite

Biochemical profile of stone-forming patients with diabetes mellitus.

Journal article Urology · March 2003 OBJECTIVES: To test the hypothesis that stone-forming patients with type II diabetes (DM-II) have a high prevalence of uric acid (UA) stones and present with some of the biochemical features of gouty diathesis (GD). METHODS: The demographic and initial bio ... Full text Link to item Cite

Durability of the medical management of cystinuria.

Journal article J Urol · January 2003 PURPOSE: Cystinuria is an autosomal recessive disorder of dibasic amino acid transport in the kidney that leads to an abundance of cystine in the urine. This molecule is poorly soluble in urine and it is prone to crystallization and stone formation at conc ... Full text Link to item Cite

Long-term combined treatment with thiazide and potassium citrate in nephrolithiasis does not lead to hypokalemia or hypochloremic metabolic alkalosis.

Journal article Kidney Int · January 2003 BACKGROUND: Potassium citrate is commonly used in combination with a thiazide diuretic in the medical management of recurrent hypercalciuric nephrolithiasis. However, concerns have been raised that administration of this nonchloride potassium alkali with a ... Full text Link to item Cite

Surgical management of urolithiasis.

Journal article Endocrinol Metab Clin North Am · December 2002 The surgical management of urinary calculus disease has changed dramatically in the past two decades. Minimally invasive options have made open stone surgery nearly obsolete. The development of shock wave lithotripsy, percutaneous nephrostolithotomy techni ... Full text Link to item Cite

Techniques to maximize flexible ureteroscope longevity.

Journal article Urology · November 2002 OBJECTIVES: To assess methods to improve the longevity and durability of flexible ureteroscopes by using the ureteral access sheath, 200-microm holmium laser fiber, and nitinol baskets or graspers during routine ureteroscopic procedures. Despite adequate a ... Full text Link to item Cite

Urinary calculi in aviation pilots: what is the best therapeutic approach?

Journal article J Urol · October 2002 PURPOSE: We reviewed treatment outcomes in a series of aviation pilots treated in the era of modern surgical techniques and provide recommendations regarding treatment in this unique group. MATERIALS AND METHODS: We retrospectively analyzed the records of ... Full text Link to item Cite

Laser Doppler flowmetric determination of ureteral blood flow after ureteral access sheath placement.

Journal article J Endourol · October 2002 BACKGROUND AND PURPOSE: The ureteral access sheath has positively impacted ureteroscopy by decreasing operative times and increasing success rates. However, as previous studies have suggested that large-caliber endoscopes may cause ureteral ischemia, conce ... Full text Link to item Cite

Endoscopic management of symptomatic caliceal diverticula: a retrospective comparison of percutaneous nephrolithotripsy and ureteroscopy.

Journal article J Endourol · October 2002 BACKGROUND AND PURPOSE: A myriad of minimally invasive options exist for managing symptomatic caliceal diverticula, including shockwave lithotripsy, percutaneous surgery, retrograde ureteroscopy, and laparoscopy. Yet no direct comparisons have been made in ... Full text Link to item Cite

Evaluation of a dissolvable ureteral drainage stent in a Swine model.

Journal article J Urol · August 2002 PURPOSE: Ureteral stents are commonly placed after routine ureteroscopic procedures to prevent acute ureteral obstruction. However, stents can cause significant symptoms, may require a secondary procedure for removal and may possibly be forgotten. Toward t ... Link to item Cite

Safety and efficacy of holmium: YAG laser lithotripsy in patients with bleeding diatheses.

Journal article J Urol · August 2002 PURPOSE: We assessed the safety and efficacy of ureteroscopy and holmium:YAG laser lithotripsy for treating upper urinary tract calculi in patients with known and uncorrected bleeding diathesis. MATERIALS AND METHODS: We retrospectively reviewed the charts ... Full text Link to item Cite

Update on shock wave lithotripsy technology.

Journal article Curr Opin Urol · July 2002 PURPOSE OF REVIEW: Since the first patient was successfully treated with extracorporeal shock wave lithotripsy in 1980, its rapid acceptance and widespread use have championed this form of stone therapy as the treatment of choice for the majority of renal ... Full text Link to item Cite

In vitro comparison of standard ultrasound and pneumatic lithotrites with a new combination intracorporeal lithotripsy device.

Journal article Urology · July 2002 OBJECTIVES: A new combination intracorporeal lithotripter (Lithoclast Ultra) has been developed that incorporates the beneficial effects of pneumatic lithotripsy (rapid stone fragmentation) and ultrasound lithotripsy (rapid fragment removal). An in vitro s ... Full text Link to item Cite

Routine postoperative imaging is important after ureteroscopic stone manipulation.

Journal article J Urol · July 2002 PURPOSE: Improved fiber optics and advanced intracorporeal lithotripsy devices have significantly decreased the incidence of complications during ureteroscopic procedures. Despite recent reports suggesting that radiographic imaging may not be necessary in ... Link to item Cite

Hypertonic saline-augmented radiofrequency ablation of the VX-2 tumor implanted in the rabbit kidney: a short-term survival pilot study.

Journal article Urology · July 2002 OBJECTIVES: The increased incidental detection of small (less than 4 cm) renal tumors has stimulated investigations of minimally invasive therapies. Radiofrequency energy is a relatively new and evolving technology that has been used for a variety of exper ... Full text Link to item Cite

Ureteral stents and their use in endourology.

Journal article Curr Opin Urol · May 2002 Ureteral stents have assisted urologists in the performance of surgery of the urinary tract for many years. They can have both diagnostic and therapeutic value, but are used most frequently as adjuncts to endoscopic or minimally invasive procedures. This r ... Full text Link to item Cite

The role of stress waves and cavitation in stone comminution in shock wave lithotripsy.

Journal article Ultrasound Med Biol · May 2002 Using an experimental system that mimics stone fragmentation in the renal pelvis, we have investigated the role of stress waves and cavitation in stone comminution in shock-wave lithotripsy (SWL). Spherical plaster-of-Paris stone phantoms (D = 10 mm) were ... Full text Link to item Cite

Computed tomography urography, three-dimensional computed tomography and virtual endoscopy.

Journal article Curr Opin Urol · March 2002 Spiral computed tomography technology allows an entire body region to be imaged as a continuous volume of computed tomography data. The acquisition of genitourinary images can be performed at different intervals after intravenous contrast injection in orde ... Full text Link to item Cite

Routine ureteral stenting is not necessary after ureteroscopy and ureteropyeloscopy: a randomized trial.

Journal article J Endourol · February 2002 BACKGROUND AND PURPOSE: Retrospective studies have suggested that routine stenting can be avoided following ureteroscopy. We prospectively analyzed the need for routine ureteral stent placement in patients undergoing ureteroscopic procedures. PATIENTS AND ... Full text Link to item Cite

Evaluation of a dissolvable ureteral drainage stent in a swine model

Journal article European Urology Supplements · January 2002 Full text Cite

In vivo assessment of free radical activity during shock wave lithotripsy using a microdialysis system: the renoprotective action of allopurinol.

Journal article J Urol · January 2002 PURPOSE: Shock wave lithotripsy is believed to cause renal damage directly through cellular injury from high energy shock waves and indirectly through vascular injury and resultant ischemia, which gives rise to oxygen free radical compounds. The transient ... Link to item Cite

Lower pole I: a prospective randomized trial of extracorporeal shock wave lithotripsy and percutaneous nephrostolithotomy for lower pole nephrolithiasis-initial results.

Journal article J Urol · December 2001 PURPOSE: The efficacy of shock wave lithotripsy and percutaneous stone removal for the treatment of symptomatic lower pole renal calculi was determined. MATERIALS AND METHODS: A prospective randomized, multicenter clinical trial was performed comparing sho ... Full text Link to item Cite

Critical analysis of supracostal access for percutaneous renal surgery.

Journal article J Urol · October 2001 PURPOSE: Percutaneous renal surgery is currently performed for complex renal calculi as well as for various other endourological indications. In many patients an upper pole nephrostomy tract allows direct access to most of the intrarenal collecting system. ... Link to item Cite

Ureteroscopic management of lower-pole renal calculi: technique of calculus displacement.

Journal article J Endourol · October 2001 PURPOSE: We review our technique of ureteroscopic management of lower pole renal calculi with Nitinol basket displacement and holmium laser stone fragmentation. METHODS: Lower pole calculi are identified with a 7.5F flexible ureteroscope. In patients in wh ... Full text Link to item Cite

Simplified ureteral stent placement with the assistance of a ureteral access sheath.

Journal article J Urol · July 2001 PURPOSE: When using a ureteral access sheath following a ureteroscopic procedure, placement of an internal ureteral stent can be simplified by inserting the stent through the sheath without the need to reinsert the cystoscope. MATERIALS AND METHODS: An ind ... Link to item Cite

Low-power holmium laser for the management of urinary tract calculi, structures, and tumors.

Journal article J Endourol · June 2001 BACKGROUND AND PURPOSE: Introduction of the holmium laser has provided an indispensable tool for the management of urinary tract stones, strictures, and superficial urothelial tumors. While full-power holmium lasers are required for laser resection of the ... Full text Link to item Cite

How do urology residents manage personal finances?

Journal article Urology · May 2001 OBJECTIVES: To examine personal financial management among residents to answer three research questions: do residents make reasonable financial choices; why do some residents not save; and what steps can be taken to improve residents' personal financial de ... Full text Link to item Cite

Role of stone analysis in metabolic evaluation and medical treatment of nephrolithiasis.

Journal article J Endourol · March 2001 BACKGROUND AND PURPOSE: Comprehensive metabolic evaluation has become an important aspect of the management of recurrent nephrolithiasis, yet the role of stone analysis is often neglected or perhaps underestimated. The purpose of this study was to determin ... Full text Link to item Cite

Does a ureteral access sheath facilitate ureteroscopy?

Journal article J Urol · March 2001 PURPOSE: Ureteral access sheaths were initially developed to facilitate difficult ureteroscopic access. However, to our knowledge no formal evaluations have been performed to assess the routine use of ureteral access sheaths. Therefore, we prospectively an ... Link to item Cite

Current urologic applications of digital imaging.

Journal article J Endourol · February 2001 One of the most significant developments in imaging technology has been the process of digitalization. By incorporating currently available digital imaging equipment into surgical practice, urologists can be assured of obtaining real-time video images with ... Full text Link to item Cite

Advances in camera, video, and imaging technologies in laparoscopy.

Journal article Urol Clin North Am · February 2001 The introduction of technological advances, such as HDTV, three-dimensional laparoscopy, and further miniaturization of high-resolution digital video cameras, will allow significantly enhanced opportunities for laparoscopic surgical proficiency and further ... Full text Link to item Cite

Virtual reality: current urologic applications and future developments.

Journal article J Endourol · February 2001 The concept of virtual reality (VR) involves the computer generation of environments with which a user can interact directly. Virtual reality is now being used for medical applications, especially in the area of surgical simulation. As technology advances, ... Full text Link to item Cite

Telemedicine: recent developments and future applications.

Journal article J Endourol · February 2001 Telemedicine, or the delivery of health care from a distance, is an exciting field that has undergone rapid advancements over the past three decades. Previous studies have demonstrated that telemedicine can effectively assist in patient care. However, cost ... Full text Link to item Cite

Nitinol stone retrieval-assisted ureteroscopic management of lower pole renal calculi.

Journal article Urology · December 20, 2000 OBJECTIVES: Current ureteroscopic intracorporeal lithotripsy devices and stone retrieval technology allow for the treatment of calculi located throughout the intrarenal collecting system. Difficulty accessing lower pole calculi, especially when the holmium ... Full text Link to item Cite

Renal surgery in the new millennium.

Journal article Urol Clin North Am · November 2000 In the not too distant future, the minimally invasive renal surgeon will be able to practice an operation on a difficult case on a three-dimensional virtual reality simulator, providing all attributes of the real procedure. The patient's imaging studies wi ... Full text Link to item Cite

Successful management of lower-pole moiety ureteropelvic junction obstruction in a partially duplicated collecting system using minimally invasive retrograde endoscopic techniques.

Journal article J Endourol · November 2000 Although the true incidence of ureteropelvic junction (UPJ) obstruction in the lower-pole moiety of an incompletely duplicated renal collecting system remains elusive, the description of this entity in the published literature is exceedingly rare. To our k ... Full text Link to item Cite

Quantification of the tip movement of lithotripsy flexible pneumatic probes.

Journal article J Urol · November 2000 PURPOSE: We developed an optical system to quantify in vitro tip movement of the Lithoclastdouble dagger flexible probe, and correlated various physical parameters of the vibrating probe tip with resultant stone fragmentation. MATERIALS AND METHODS: A nonc ... Link to item Cite

Microdialysis assessment of shock wave lithotripsy-induced renal injury.

Journal article Urology · September 1, 2000 OBJECTIVES: Shock wave lithotripsy (SWL) is the primary treatment modality for managing the majority of symptomatic renal calculi. However, the fundamental mechanisms for stone fragmentation and the resultant morphologic changes that occur are not fully un ... Full text Link to item Cite

Acoustic and mechanical properties of artificial stones in comparison to natural kidney stones.

Journal article J Urol · August 2000 PURPOSE: Standardized and reproducible artificial kidney stone models are important for performing comparative studies of different lithotripsy modalities. The acoustic and mechanical properties of renal calculi dictate the manner by which stones interact ... Link to item Cite

Ureteroscopic management of recurrent renal cystine calculi.

Journal article J Endourol · August 2000 BACKGROUND AND PURPOSE: Patients with recurrent cystine nephrolithiasis oftentimes require multiple procedures for stone removal. As the majority of cystine stones are resistant to the effects of shockwave lithotripsy, repeat percutaneous surgery is often ... Full text Link to item Cite

Clinical efficacy of combined lithoclast and lithovac stone removal during ureteroscopy.

Journal article J Urol · July 2000 PURPOSE: Pneumatic lithotripsy has proved to be an extremely safe, efficient and low cost intracorporeal fragmentation modality. Unfortunately proximal migration of fragments into inaccessible areas in the intrarenal collecting system is a potential limita ... Link to item Cite

Management of residual stones.

Journal article Urol Clin North Am · May 2000 Stone-free status is highly dependent on selection of the appropriate surgical technique, which should be tailored according to the individual stone and patient parameters. Although a stone-free state is the desired outcome of surgical intervention of urol ... Full text Link to item Cite

Endoscopic management of urologic disease with the holmium laser.

Journal article Curr Opin Urol · May 2000 The efficiency and safety profile of the holmium laser have made this tool a versatile multipurpose instrument for use in the endoscopic treatment of a wide variety of urologic disorders. Herein are reviewed holmium laser physics and current endourologic a ... Full text Link to item Cite

Combined antegrade and retrograde endoscopic approach for the management of urinary diversion-associated pathology.

Journal article J Endourol · April 2000 BACKGROUND: Endourologic management of stones and strictures in patients with a urinary diversion is often cumbersome because of the absence of standard anatomic landmarks. We report on our technique of minimally invasive management of urinary diversion-as ... Full text Link to item Cite

Physical properties of artificial stones made of natural materials (BON(N)-STONES) in comparison to natural and other artificial stones

Journal article Journal Fur Urologie Und Urogynakologie · March 23, 2000 From a clinical point of view the artificial stone phantoms known so far are a compromise for in vitro investigations. Concerning experiments on chemolysis they are not useable because they are not comparable to natural renal calculi. Therefore it was the ... Cite

Physical properties of artificial stones made of natural materials (BON(N)-STONES) in comparison to natural and other artificial stones

Journal article Journal fur Urologie und Urogynakologie · 2000 From a clinical point of view the artificial stone phantoms known so far are a compromise for in vitro investigations. Concerning experiments on chemolysis they are not useable because they are not comparable to natural renal calculi. Therefore it was the ... Cite

Incorporation of patient preferences in the treatment of upper urinary tract calculi: a decision analytical view.

Journal article J Urol · December 1999 PURPOSE: Patient preferences, or utilities, may be crucial to select an appropriate treatment plan for stone disease. We used decision modeling to understand better patient choices and decision making in the overall management of recurrent nephrolithiasis. ... Full text Link to item Cite

Recent developments in SWL physics research.

Journal article J Endourol · November 1999 Two projects in our laboratory highlight some recent developments in shockwave lithotripsy (SWL) physics research. In the first project, we developed a prototype of a piezoelectric annular array (PEAA) shockwave generator that can be retrofitted on a Dorni ... Full text Link to item Cite

The incidence of nephrolithiasis in patients with spinal neural tube defects.

Journal article J Urol · September 1999 PURPOSE: Bladder stones are common in patients with spinal neural tube defects but there are little data on the incidence of renal calculi in this population. We examined the incidence, nature and risk factors of nephrolithiasis in our clinic population of ... Full text Link to item Cite

How to improve lithotripsy and chemolitholysis of brushite-stones: an in vitro study.

Journal article Urol Res · August 1999 Because of their resistance to fragmentation, treatment of brushite stones is a big problem. This study was performed to look for an improvement in therapeutic strategies by using artificial stones made of brushite (Bon(n)-stones), which are comparable to ... Full text Link to item Cite

Advances in digital imaging during endoscopic surgery.

Journal article J Endourol · May 1999 BACKGROUND AND OBJECTIVE: Digital imaging capabilities have recently been incorporated into a number of video systems. Contrast enhancement when using a rigid or semirigid endoscope improves image definition by seeking out existing transitions in detail. O ... Full text Link to item Cite

URETEROSCOPIC MANAGEMENT OF LOWER POLE RENAL CALCULI

Journal article The Journal of Urology · April 1999 Full text Cite

SECURED MEDICAL IMAGING OVER THE INTERNET

Journal article The Journal of Urology · April 1999 Full text Cite

Secure transmission of urologic images and records over the Internet.

Journal article J Endourol · April 1999 PURPOSE: Telemedicine has become a common method for the transmission of images and patient data across long distances. Our goal was to assess the efficiency and accuracy of Photomailer MD software, a store-and-forward telemedicine system, in the urologic ... Full text Link to item Cite

Use of a digital camera in the urologic setting.

Journal article Urology · March 1999 Urologists are faced with increasing demands for clear documentation of their work. We report the use of a digital camera in our practice to capture images throughout the urologic setting. The digital camera was a quick and convenient means of obtaining go ... Full text Link to item Cite

A new generation of semirigid fiberoptic ureteroscopes.

Journal article J Endourol · February 1999 BACKGROUND: Further advances in endoscope technology have allowed the development of a new generation of tightly packed fiberoptics encased within a rigid ureteroscope. The tips of these semirigid ureteroscopes measure between 5.0F and 11.9F, and their wor ... Full text Link to item Cite

Influence of chemolysis on physical properties and comminution of artificial stones (BON(N)-STONES)

Journal article Aktuelle Urologie · 1999 Purpose: Acoustic and mechanical properties show significant differences among various stone compositions and are important parameters for the determination of stone fragility under shock wave impact. Suggesting that stone fragility and thus shock wave lit ... Cite

Influence of chemolysis on physical properties and comminution of artificial stones (BON(N)-STONES)

Journal article Aktuelle Urologie · January 1, 1999 Purpose: Acoustic and mechanical properties show significant differences among various stone compositions and are important parameters for the determination of stone fragility under shock wave impact. Suggesting that stone fragility and thus shock wave lit ... Full text Cite

Impact of holmium laser settings and fiber diameter on stone fragmentation and endoscope deflection.

Journal article J Endourol · December 1998 We compared the impact of various energy settings, frequency, and fiber diameters on the stone fragmentation capabilities of the holmium laser. Stone phantoms, made from plaster of Paris and uniform in weight, were treated with one of two laser fiber sizes ... Full text Link to item Cite

Retroperitoneal and pelvic extraperitoneal laparoscopy: an international perspective.

Journal article Urology · October 1998 OBJECTIVES: To assess technical preferences and current practice trends of retroperitoneal and pelvic extraperitoneal laparoscopy. METHODS: A questionnaire survey of 36 selected urologic laparoscopic centers worldwide was performed. RESULTS: Twenty-four ce ... Full text Link to item Cite

Use of ureteroscopy and holmium:YAG laser in patients with bleeding diatheses.

Journal article Urology · October 1998 OBJECTIVES: To assess the safety and efficacy of ureteroscopy and holmium laser in patients with known bleeding diatheses and upper tract calculi or transitional cell carcinoma (TCC). METHODS: Eight patients with stone disease and 1 patient with upper trac ... Full text Link to item Cite

Unenhanced helical computerized tomography for the evaluation of patients with acute flank pain.

Journal article J Urol · September 1998 PURPOSE: We determined the value of unenhanced helical computerized tomography (CT) in the diagnosis of acute flank pain in 105 patients evaluated for suspected stone disease. MATERIALS AND METHODS: Noncontrasted spiral CT was done in 105 consecutive patie ... Full text Link to item Cite

Transient cavitation and acoustic emission produced by different laser lithotripters.

Journal article J Endourol · August 1998 Transient cavitation and shockwave generation produced by pulsed-dye and holmium:YAG laser lithotripters were studied using high-speed photography and acoustic emission measurements. In addition, stone phantoms were used to compare the fragmentation effici ... Full text Link to item Cite

Lipid peroxidation induced by shockwave lithotripsy.

Journal article J Endourol · June 1998 To determine the relation between high-energy shockwaves (HESW) and the presence of lipid peroxidation produces, juvenile pigs were subjected to shockwave lithotripsy (SWL). After lithotripsy, both treated and control kidneys were analyzed, along with urin ... Full text Link to item Cite

Retrograde balloon cautery incision of ureteropelvic junction obstruction.

Journal article Urol Clin North Am · May 1998 Retrograde balloon endopyelotomy has produced durable success rates of approximately 80% for all patients with UPJ obstruction. Patients with poor renal function, high-grade hydronephrosis, or stricture lengths of more than 2 cm fair worse, and these facto ... Full text Link to item Cite

Laboratory and clinical assessment of pneumatically driven intracorporeal lithotripsy.

Journal article J Endourol · April 1998 A pneumatically driven intracorporeal lithotripter (the Swiss Lithoclast) has recently been approved for use in the United States. We compared its performance in vitro with ultrasonic, electrohydraulic and laser lithotripsy devices using a standard plaster ... Full text Link to item Cite

Safety and efficacy of the Alexandrite laser for the treatment of renal and ureteral calculi.

Journal article Urology · January 1998 OBJECTIVES: To assess the safety and efficacy of the Alexandrite laser for intracorporeal lithotripsy of renal and ureteral stones in conjunction with ureterorenoscopy or percutaneous nephrostolithotomy. METHODS: We retrospectively analyzed the records of ... Full text Link to item Cite

Interobserver variability in the interpretation of unenhanced helical CT for the diagnosis of ureteral stone disease.

Journal article J Comput Assist Tomogr · 1998 PURPOSE: The purpose of this study was to analyze interobserver agreement in the interpretation of unenhanced helical CT (UHCT) for the evaluation of ureteral stone disease and obstruction. METHOD: One hundred three UHCT examinations were independently and ... Full text Link to item Cite

Microwave thermotherapy for benign prostatic hyperplasia with the Dornier Urowave: results of a randomized, double-blind, multicenter, sham-controlled trial.

Journal article Urology · January 1998 OBJECTIVES: To study the efficacy and safety of a new transurethral microwave thermotherapy device (the Urowave) in the treatment of men with clinical benign prostatic hyperplasia (BPH) in a randomized, double-blind, sham-controlled trial. METHODS: A total ... Full text Link to item Cite

Controlled, forced collapse of cavitation bubbles for improved stone fragmentation during shock wave lithotripsy.

Journal article J Urol · December 1997 The feasibility of using controlled, forced collapse of cavitation bubbles for improved stone fragmentation during shock wave lithotripsy was demonstrated using microsecond tandem shockwave pulses. High-speed photography revealed that a secondary shock wav ... Full text Link to item Cite

A randomized, blinded study comparing microwave thermotherapy (dornier urowave(tm)) with a sham procedure in patients with clinical benign prostatic hyperplasia (bph)

Journal article British Journal of Urology · December 1, 1997 INTRODUCTION AND OBJECTIVES: Microwave thermotherapy has been identified as an effective treatment for patients with clinical BPH. We report the results of a multi-center, prospective, randomized, sham-controlled, singleblinded trial with blinding of the f ... Cite

Ethnic and geographic diversity of stone disease.

Journal article Urology · October 1997 OBJECTIVES: To ascertain diversity or similarity in stone prevention and problems among different countries around the world. METHODS: Urolithiasis research groups from 10 countries completed a questionnaire. RESULTS: Cost of extracorporeal shock wave lith ... Full text Link to item Cite

Inertial cavitation and associated acoustic emission produced during electrohydraulic shock wave lithotripsy.

Journal article J Acoust Soc Am · May 1997 The inertial cavitation and associated acoustic emission generated during electrohydraulic shock wave lithotripsy were studied using high-speed photography and acoustic pressure measurements. The dynamics of cavitation bubble clusters, induced in vitro by ... Full text Link to item Cite

Transient oscillation of cavitation bubbles near stone surface during electrohydraulic lithotripsy.

Journal article J Endourol · February 1997 Using high-speed photography and acoustic emission measurements, we studied the dynamics of a transient cavitation bubble near a stone surface and the concomitant shockwaves generated during electrohydraulic lithotripsy (EHL). At each spark discharge, a va ... Full text Link to item Cite

Management of calyceal calculi.

Journal article Urol Clin North Am · February 1997 Management of calyceal calculi has changed dramatically during the past 20 years. Minimally invasive techniques virtually have replaced open surgical stone removal. Even large and complex calyceal calculi may be treated effectively with these minimally inv ... Full text Link to item Cite

Laparoscopic radical prostatectomy in the canine model.

Journal article J Laparoendosc Surg · December 1996 The purpose of this study was to determine the feasibility of performing laparoscopic radical prostatectomy in a canine model. Laparoscopic radical prostatectomy was performed on six adult male canines. A new endoscopic needle driver was used to construct ... Full text Link to item Cite

Percutaneous transhepatic endoscopic electrohydraulic lithotripsy of biliary tract calculi after orthotopic liver transplantation.

Journal article J Laparoendosc Surg · October 1996 The development of biliary tract calculi after orthotopic liver transplantation presents a unique clinical problem. Previously described techniques for removing biliary stones by shock wave lithotripsy, litholytic therapy with oral bile acids, and endoscop ... Full text Link to item Cite

Struvite calculi.

Journal article Semin Nephrol · September 1996 Although calcium oxalate stones are the most common type of calculi found in the United States, struvite or infection stones are quite common and generally pose a difficult treatment dilemma. The presence of urinary infection with a urease-producing organi ... Link to item Cite

Long-term follow-up of Acucise incision of ureteropelvic junction obstruction and ureteral strictures.

Journal article Urology · March 1996 OBJECTIVES: There are few data on the long-term effectiveness of various endoureterotomy procedures. One such technique for the treatment of ureteral strictures and ureteropelvic junction (UPJ) obstruction utilizes a recently developed ureteral cutting bal ... Full text Link to item Cite

Is there still a role for percutaneous stone removal in the age of lithotripsy?

Journal article Current Opinion in Urology · January 1, 1996 The introduction of shock-wave lithotripsy has radically changed the treatment strategy for the management of most renal calculi. However, many stones cannot be treated effectively with this form of lithotripsy, and are best managed with percutaneous proce ... Full text Cite

Comparison of open and endourologic approaches to the obstructed ureteropelvic junction.

Journal article Urology · December 1995 OBJECTIVES: To compare open pyeloplasty with three minimally invasive modalities: antegrade endopyelotomy, Acucise endopyelotomy (Applied Medical, Laguna Hills, Calif), and laparoscopic pyeloplasty. METHODS: Forty-five adult patients with ureteropelvic jun ... Full text Link to item Cite

Clinical and biochemical presentation of gouty diathesis: comparison of uric acid versus pure calcium stone formation.

Journal article J Urol · November 1995 PURPOSE: We compared gouty diathesis with uric acid versus calcium stones. MATERIALS AND METHODS: We retrospectively reviewed clinical and laboratory data from 95 gouty diathesis patients (28 with uric acid and 67 with calcium stones) and 99 normal subject ... Full text Link to item Cite

Primary hyperoxaluria.

Journal article Urology · July 1995 Full text Link to item Cite

Three-dimensional video imaging for endoscopic surgery.

Journal article Comput Biol Med · March 1995 Recently a number of manufacturers have developed three-dimensional (3-D) video systems which significantly improve visualization and enhance the ability of the surgeon to perform delicate endoscopic dissection and suturing. These 3-D video systems may als ... Full text Link to item Cite

Extracorporeal shock wave lithotripsy for renal stones with renal cysts present.

Journal article J Urol · March 1995 While reports differ on the effect of extracorporeal shock wave lithotripsy (ESWL*) on renal cysts, little has been written on the stone-free status following ESWL for renal calculi with renal cysts present. We studied 13 patients with renal stones plus re ... Full text Link to item Cite

Lower pole calicostomy for the management of iatrogenic ureteropelvic junction obstruction.

Journal article J Urol · January 1995 It is often possible to use endoscopic techniques for the management of iatrogenic upper ureteral or ureteropelvic junction obstruction. However, in some cases with severe stricture disease or significant ischemic injury open surgical reconstruction is nec ... Full text Link to item Cite

Effect of medical management and residual fragments on recurrent stone formation following shock wave lithotripsy.

Journal article J Urol · January 1995 Minimal emphasis has been placed on the clinical sequelae of residual stone fragments following shock wave lithotripsy. Moreover, there are no studies investigating the role of medical therapy on the course of stone disease in patients with residual fragme ... Full text Link to item Cite

Struvite Calculi

Journal article Radiology · December 1994 Full text Cite

Mechanisms of differing stone fragility in extracorporeal shockwave lithotripsy.

Journal article J Endourol · August 1994 Clinical experience with extracorporeal shockwave lithotripsy (SWL) has demonstrated significant variations in stone fragility. To understand the physical mechanisms of the differences, we quantitatively determined shockwave-stone interaction under clinica ... Full text Link to item Cite

Laparoscopic removal of gonads containing on occult seminoma in a woman with complete androgen resistance.

Journal article J Am Assoc Gynecol Laparosc · May 1994 A 20-year-old woman with complete androgen resistance (AR; 46,XY), underwent prophylactic laparoscopic gonadectomy because of the known increased risk of gonadal malignancy. The procedure was performed with electrocoagulation using a four-puncture techniqu ... Full text Link to item Cite

Differing modes of shock-wave generation.

Journal article Semin Urol · February 1994 Link to item Cite

Retroperitoneal laparoscopic nephrectomy and other procedures in the upper retroperitoneum using a balloon dissection technique.

Journal article Eur Urol · 1994 This article describes a hydraulic balloon dissection technique. The retroperitoneum is developed via a small lumbodorsal incision between the edges of the musculus latissimus dorsi and musculus obliquus externus and then after visualization of its correct ... Full text Link to item Cite

Surgical simulation using virtual reality technology: design, implementation, and implications.

Journal article Surg Technol Int · 1994 Atremendous demand exists for enhancing the way by which physicians learn new invasive procedures. Appropriate education in new medical and surgical procedures is often outpaced by the desire of physicians to incorporate a procedure in their practice. Comp ... Link to item Cite

Advanced endoscopic imaging: 3-d laparoscopic endoscopy.

Journal article Surg Technol Int · 1994 Video imaging technology has significantly enhanced the performance of minimally invasive surgical procedures. However, a major limiting factor for the endoscopic surgeon is to work in a 3-dimensional field while viewing a two-dimensional video image. Adva ... Link to item Cite

Surgical simulation using virtual reality technology: design, implementation, and implications.

Journal article Surg Technol Int · 1994 Atremendous demand exists for enhancing the way by which physicians learn new invasive procedures. Appropriate education in new medical and surgical procedures is often outpaced by the desire of physicians to incorporate a procedure in their practice. Comp ... Link to item Cite

Advanced endoscopic imaging: 3-d laparoscopic endoscopy.

Journal article Surg Technol Int · 1994 Video imaging technology has significantly enhanced the performance of minimally invasive surgical procedures. However, a major limiting factor for the endoscopic surgeon is to work in a 3-dimensional field while viewing a two-dimensional video image. Adva ... Link to item Cite

Acoustic and mechanical properties of renal calculi: implications in shock wave lithotripsy.

Journal article J Endourol · December 1993 The acoustic and mechanical properties of renal calculi dictate how a stone interacts with the mechanical forces produced by shock wave lithotripsy; thus, these properties are directly related to the success of the treatment. Using an ultrasound pulse tran ... Full text Link to item Cite

Laparoscopic dismembered pyeloplasty.

Journal article J Urol · December 1993 As laparoscopic nephrectomy has become a viable ablative procedure for kidney removal, additional areas of reconstructive laparoscopic urological procedures are being investigated. We describe our early experience with laparoscopic pyeloplasty for the mana ... Full text Link to item Cite

Transperitoneal laparoscopic nephrectomy: training, technique, and results.

Journal article J Endourol · December 1993 Transperitoneal laparoscopic nephrectomy was integrated into our daily routine within a 6-month period by means of a step-by-step training program progressing from a pelvic trainer to animal studies (N = 15) to laptent-assisted surgery. The pneumoperitoneu ... Full text Link to item Cite

A comparison of the bioeffects of four different modes of stone therapy on renal function and morphology.

Journal article J Urol · October 1993 A variety of therapeutic options exists for removal of symptomatic renal calculi, including extracorporeal shock wave lithotripsy, percutaneous nephrostolithotomy and open pyelolithotomy or nephrolithotomy. Although lithotripsy offers the advantage of redu ... Full text Link to item Cite

Propagation of shock waves in elastic solids caused by cavitation microjet impact. II: Application in extracorporeal shock wave lithotripsy.

Journal article J Acoust Soc Am · July 1993 To better understand the mechanism of stone fragmentation during extracorporeal shock wave lithotripsy (ESWL), the model developed in Part I [P. Zhong and C.J. Chuong, J. Acoust. Soc. Am. 94, 19-28 (1993)] is applied to study cavitation microjet impingemen ... Full text Link to item Cite

Treatment philosophy and retreatment rates following piezoelectric lithotripsy.

Journal article J Urol · January 1993 Second generation lithotriptors offer the advantage of anesthesia-free fragmentation of renal and ureteral calculi but they frequently require multiple treatments to attain a stone-free status. However, excessive single lithotripsy sessions or multiple tre ... Full text Link to item Cite

Characterization of fracture toughness of renal calculi using a microindentation technique

Journal article Journal of Materials Science Letters · 1993 We report our results on the characterization of fracture toughness of renal calculi of various compositions. A microindentation technique was used to determine stone hardness. The results showed distinct differences in fracture toughness of renal calculi ... Cite

The role of medical therapy in the age of lithotripsy

Journal article Problems in Urology · January 1, 1993 Selective medical therapy for nephrolithiasis is effective in preventing new stone formation. A remission rate greater than 80% and overall reduction in individual stone formation greater than 90% can be obtained in patients with recurrent nephrolithiasis. ... Cite

Use of ketoconazole to probe the pathogenetic importance of 1,25-dihydroxyvitamin D in absorptive hypercalciuria.

Journal article The Journal of Clinical Endocrinology & Metabolism · December 1992 Full text Cite

Use of ketoconazole to probe the pathogenetic importance of 1,25-dihydroxyvitamin D in absorptive hypercalciuria.

Journal article J Clin Endocrinol Metab · December 1992 Ketoconazole was used to probe the pathogenetic importance of the serum 1,25-dihydroxyvitamin D [1,25-(OH)2D] concentration in 19 patients with well characterized absorptive hypercalciuria (AH). Patients were studied while receiving a constant metabolic di ... Full text Link to item Cite

Microhardness measurements of renal calculi: regional differences and effects of microstructure.

Journal article J Biomed Mater Res · September 1992 Microhardnesses of five types of renal calculi: calcium apatite (82.5%)/magnesium ammonium phosphate hydrogen (10%)/calcium oxalate monohydrate (7.5%); calcium apatite (95%)/calcium oxalate monohydrate (5%); magnesium ammonium phosphate hydrogen (90%)/calc ... Full text Link to item Cite

A comparison of stone damage caused by different modes of shock wave generation.

Journal article J Urol · July 1992 A standard stone phantom was used to compare stone damage after extracorporeal shock wave administration from electrohydraulic, electromagnetic and piezoelectric lithotripters. For each machine, a low and high shock wave intensity setting was chosen: 18 & ... Full text Link to item Cite

Renal calculi: pathogenesis, diagnosis, and medical therapy.

Journal article Semin Nephrol · March 1992 Selective medical therapy of nephrolithiasis is highly effective in preventing new stone formation. A remission rate of greater than 80% and an overall reduction in individual stone formation rate of greater than 90% can be obtained in patients with nephro ... Link to item Cite

Flexible deflectable ureterorenoscopy

Journal article Problems in Urology · January 1, 1992 The widespread use of flexible deflectable ureterorenoscopy has enabled routine diagnostic and therapeutic procedures to be performed within the upper urinary tract. Many of the attributes that make flexible ureterorenoscopy a useful and effective tool can ... Cite

Extracorporeal Shock Wave Lithotripsy: Comparison between Stone and No-Stone Animal Models of SWL

Journal article Journal of Endourology · January 1, 1992 In vitro experimental data have recently documented alterations in shock wave mechanics after striking a calculus. Whether this alteration enhances, reduces, or has any effect on the extent of tissue injury is unknown. In order to determine the possible al ... Full text Cite

National High Blood Pressure Education Program (NHBPEP) review paper on complications of shock wave lithotripsy for urinary calculi.

Journal article Am J Med · December 1991 This decade has witnessed dramatic advances in the surgical management of urinary calculi. Today, most stones can be removed by minimally invasive means. In fact, the treatment of choice in 60% to 90% of patients with renal and ureteral calculi that need t ... Full text Link to item Cite

Temporal effects of shock wave lithotripsy.

Journal article J Urol · April 1991 Previous studies have demonstrated that renal parenchymal injury following extracorporeal shock wave lithotripsy is dependent upon shock wave power as well as the total number of shock waves administered. In order to determine the deleterious effects of te ... Full text Link to item Cite

A comparison of renal damage induced by varying modes of shock wave generation.

Journal article J Urol · April 1991 To evaluate for the possible differences in the extent of pathologic injury occurring following treatment with various lithotripsy modalities, we subjected rabbits to treatment on either an electrohydraulic, electromechanical, or piezoelectric lithotripter ... Full text Link to item Cite

Shock wave physics.

Journal article Am J Kidney Dis · April 1991 Extracorporeal shock wave lithotripsy has significantly altered the management of symptomatic renal and ureteral calculi. Yet in an effort to limit the potentially harmful effects of shock waves, while still maintaining or maximizing stone fragmentation, o ... Full text Link to item Cite

Renal Calculi

Journal article Journal of Urology · February 1991 Full text Cite

Video-Assisted Transurethral Resection of the Prostate

Journal article Journal of Endourology · January 1, 1991 Continued advances in video technology have made video-assisted transurethral resection of the prostate (video TURP) an easy, reliable, and affordable option available to all urologists. Smaller video cameras with improved resolution, combined with more co ... Full text Cite

Preservation of Renal Architecture During Extracorporeal Shock Wave Lithotripsy

Journal article Journal of Endourology · January 1, 1991 Acute renal morphologic and functional changes after extracorporeal shock wave lithotripsy are thought to be attributable to two distinct mechanisms: direct cellular injury from the shock wave energy or indirect injury secondary to relative ischemia from c ... Full text Cite

Brucella orchitis: a rare cause of testicular enlargement.

Journal article J Urol · April 1990 The differential diagnosis of the acutely enlarged testis includes numerous benign and malignant disease processes. Most are treated with radical orchiectomy due to difficulty in differentiating between these disorders preoperatively. Saving the involved t ... Full text Link to item Cite

Extracorporeal shock wave lithotripsy. An update.

Journal article Urol Clin North Am · February 1990 Extracorporeal shock wave lithotripsy has revolutionized the treatment of urinary calculi. It should be considered the treatment of choice for renal stones smaller than 2 cm and for the majority of ureteral calculi, under which circumstances success rates ... Link to item Cite

Laxative abuse as a cause for ammonium urate renal calculi.

Journal article J Urol · February 1990 Nine women with laxative abuse and predominantly ammonium urate renal calculi underwent metabolic studies to identify common chemical abnormalities and determine pathophysiology. The 24-hour urine studies demonstrated marked decreases in volume (902 cm.3), ... Full text Link to item Cite

Intrarenal Pressures Generated During Flexible Deflectable Ureterorenoscopy

Journal article Journal of Endourology · January 1, 1990 Refinements in ureteroscopic instrumentation have provided flexible ureterorenoscopes of small external diameter with the capacity for active tip deflection. Despite the many advantages offered by these instruments, the concomitant decrease in the caliber ... Full text Cite

Flow, Pressure, and Deflection Characteristics of Flexible Deflectable Ureterorenoscopes

Journal article Journal of Endourology · January 1, 1990 In vitro studies with four flexible deflectable ureterorenoscopes were conducted for flow, pressure, and deflection characteristics. Various modes of irrigation were implemented including gravity, hand (syringe), and roller pump (Uromat). The addition of a ... Full text Cite

Intracorporeal Electrohydraulic Lithotripsy with Flexible Ureterorenoscopy

Journal article Journal of Endourology · January 1, 1990 Electrohydraulic lithotripsy (EHL) is an effective means of intracorporeal fragmentation of symptomatic ureteral calculi, and the recent development of 3.OF and 1.9F EHL probes has extended the safe use of this modality in the upper urinary tract. Over the ... Full text Cite

Renal Magnetic Resonance Appearance After Piezoelectric and Electrohydraulic Lithotripsy

Journal article Journal of Endourology · January 1, 1990 Morphologic changes of the kidney after extracorporeal shock wave lithotripsy (SWL) have been demonstrated by magnetic resonance imaging (MRI) to be present in as many as 85% of patients treated with first-generation electrohydraulic lithotripters. We comp ... Full text Cite

Bladder perforation secondary to clean intermittent catheterization.

Journal article J Urol · November 1989 Clean intermittent catheterization has been an effective treatment for the management of patients with a neurogenic bladder during the last 15 years. Reported complication rates have been low and the majority of these problems have been minor. While signif ... Full text Link to item Cite

Ureteral stenting during extracorporeal shock wave lithotripsy: help or hindrance?

Journal article J Urol · July 1989 We retrospectively reviewed the outcome of extracorporeal shock wave lithotripsy in patients with renal calculi less than 3 cm. in size who were treated at a large multi-user lithotripsy center. Patients in whom indwelling ureteral stents were placed befor ... Full text Link to item Cite

Sonographic Piezoelectric Lithotripsy: More Bang for Your Buck

Journal article Journal of Endourology · January 1, 1989 Full text Cite

Comparison of Extracorporeal Shock Wave Lithotripsy and Percutaneous Nephrolithotomy for the Treatment of Renal Calculi in Lower Pole Calices

Journal article Journal of Endourology · January 1, 1989 Lower pole caliceal calculi can be treated by percutaneous nephrolithotomy (PCNL) or by extracorporeal shock wave lithotripsy (ESWL). In previous studies, investigators have noted that stones in lower calices treated with ESWL have a poor clearance rate. T ... Full text Cite

Localized amyloidosis of the urethra: diagnostic implications and management.

Journal article J Urol · December 1988 Localized amyloidosis of the urethra is a rare pathological entity that may resemble neoplastic disease. Biopsy is required to make the appropriate diagnosis. Although localized therapy is available for obstructing, symptomatic lesions, asymptomatic lesion ... Full text Link to item Cite

Changing surgical aspects of urinary stone disease.

Journal article Surg Clin North Am · October 1988 Surgical management of urinary calculous disease has changed dramatically in the past decade. The development of percutaneous nephrostomy techniques has allowed new access to upper tract stones. Percutaneous removal of large calculi was made possible by th ... Full text Link to item Cite

Flexible cystoscopy.

Journal article Urol Clin North Am · August 1988 Flexible fiberoptic technology was first applied to cystoscopy in 1973, with greatly increased usage since 1982. Most procedures formerly performed with rigid cystoscopes can be done using flexible cystoscopes with minimal or no anesthesia. Patient positio ... Link to item Cite

Treatment of ureteral calculi by extracorporeal shock wave lithotripsy at a multi-use center.

Journal article J Urol · June 1988 We reviewed our experience with extracorporeal shock wave lithotripsy therapy in 138 patients who presented with mid and upper ureteral calculi. In the patients who had successful stone manipulation back into the renal collecting system the success rate wa ... Full text Link to item Cite

Urinary glycosaminoglycans in normal subjects and patients with stones.

Journal article J Urol · May 1988 Urinary glycosaminoglycans are thought to be macromolecular inhibitors of calcium stone formation. The 24-hour excretion of urinary glycosaminoglycans was measured quantitatively in 24 normal subjects and 206 patients with different etiologies of stone dis ... Full text Link to item Cite

Alkali action on the urinary crystallization of calcium salts: contrasting responses to sodium citrate and potassium citrate.

Journal article J Urol · February 1988 Alkali therapy is used commonly to prevent recurrent stone formation in patients with distal renal tubular acidosis. We compared the effects of potassium citrate to those of sodium citrate in 6 well defined cases of incomplete distal renal tubular acidosis ... Full text Link to item Cite

FLEXIBLE CYSTOSCOPY

Journal article The Japanese Journal of Urology · 1988 Full text Cite

Eventual attenuation of hypocalciuric response to hydrochlorothiazide in absorptive hypercalciuria.

Journal article J Urol · June 1987 The effect of long-term hydrochlorothiazide therapy on renal calcium excretion was measured in 12 well defined cases of absorptive hypercalciuria and 10 of renal hypercalciuria. Patients were studied during a control phase, at 3 to 6 months of therapy and ... Full text Link to item Cite

Pharmacologic treatment of calcium calculi.

Journal article Urol Clin North Am · May 1987 Selective pharmacologic therapy of calcium nephrolithiasis is highly effective in preventing new stone formation. A remission rate of greater than 80 per cent and overall reduction in individual stone formation rate of greater than 90 per cent can be obtai ... Link to item Cite

Pharmacologic treatment of uric acid calculi.

Journal article Urol Clin North Am · May 1987 Uric acid stone disease is dependent on three pathogenetic factors: acid urine pH, low urine volume, and hyperuricosuria. The management of nonobstructing uric acid calculi should include maintenance of an alkaline urine, an increase in urine volume, and r ... Link to item Cite

Cephalad renal movement during percutaneous nephrostolithotomy.

Journal article J Urol · April 1987 The change in the position of the kidney during percutaneous nephrostomy is a major concern to urologists who participate in percutaneous stone removal. We report that the majority of kidneys ascend an average of 2.2 cm. when the patient turns from a supin ... Full text Link to item Cite

Hypercalciuria and altered intestinal calcium absorption occurring independently of vitamin D in incomplete distal renal tubular acidosis.

Journal article Metabolism · February 1987 Negative calcium balance and calcium nephrolithiasis are two sequelae of chronic metabolic acidosis. To establish the effects of acidosis on calcium and vitamin D metabolism, we have examined a group of nine patients with incomplete distal renal tubular ac ... Full text Link to item Cite

Impact of Video on Endourology

Journal article Journal of Endourology · January 1, 1987 Recent technical advances in video equipment have made this technology a useful adjunct for endourologic procedures. Video monitoring facilitates both medical and patient education, and video recording of procedures provides permanent documentation for pat ... Full text Cite

Ureteral Stone Extraction Utilizing Nondeflectable Flexible Fiberoptic Ureteroscopes

Journal article Journal of Endourology · January 1, 1987 Symptomatic ureteral calculi averaging 6 x 7 mm in diameter were removed from the mid upper ureter in 5 patients with a 9F or 8.5F nondeflectable flexible ureteroscope and a basket or forceps. This instrument can be passed through a cystoscope easily and s ... Full text Cite

Endourologic Diagnosis and Treatment of Essential Hematuria

Journal article Journal of Endourology · January 1, 1987 Macroscopic lateralizing hematuria was noted at cystoscopy in eight patients. All patients underwent ureterorenoscopy, percutaneous nephroscopy, or both, and in all cases, an active or suspected bleeding site was identified and fulgurated. No patient requi ... Full text Cite

Outpatient percutaneous nephrostolithotomy.

Journal article J Urol · August 1986 Technical advances and operator experience have resulted in a rapid and marked streamlining of the percutaneous approach to renal calculi. The development of nephrostomy tract balloon dilators, improved grasping instruments and the use of assisted local an ... Full text Link to item Cite

Comparative efficacy of "specific" potassium citrate therapy versus conservative management in nephrolithiasis of mild to moderate severity.

Journal article J Urol · October 1985 It generally is believed that conservative measures of high fluid intake and dietary modification in the setting of a stone clinic could favorably influence the course of renal stone disease. To establish the effect of specific medical treatment from the s ... Full text Link to item Cite

Male urethral diverticulum: the double density sign.

Journal article Urology · October 1985 An anatomic defect of the urethra is occasionally the cause of voiding dysfunction in the young male patient. A urethral diverticulum can often be overlooked if retrograde urethrography is not performed properly. Two cases are presented along with a discus ... Full text Link to item Cite

Correction of hypocitraturia and prevention of stone formation by combined thiazide and potassium citrate therapy in thiazide-unresponsive hypercalciuric nephrolithiasis.

Journal article Am J Med · September 1985 Thirteen patients with hypercalciuric calcium nephrolithiasis continued to form calcium stones when treated with thiazide (4.69 +/- 6.62 [mean +/- SD] stones per patient-year to 5.12 +/- 10.87 stones per patient-year), despite adequate hypocalciuric respon ... Full text Link to item Cite

Prevention of recurrent calcium stone formation with potassium citrate therapy in patients with distal renal tubular acidosis.

Journal article J Urol · July 1985 Distal renal tubular acidosis is a common cause of intractable calcium nephrolithiasis. We examined the effect of oral potassium citrate therapy in 9 patients with incomplete distal renal tubular acidosis diagnosed on the basis of an abnormal response to a ... Full text Link to item Cite

The current role of medical treatment of nephrolithiasis: the impact of improved techniques of stone removal.

Journal article J Urol · July 1985 To document more clearly the effect of selective medical treatment on the course of nephrolithiasis, we surveyed 103 consecutive patients being followed in our stone clinic. Of the patients who initially had existing stones within the kidneys 69 per cent e ... Full text Link to item Cite

Long-term treatment of calcium nephrolithiasis with potassium citrate.

Journal article J Urol · July 1985 The long-term effects of potassium citrate therapy (usually 20 mEq. 3 times daily during 1 to 4.33 years) were examined in 89 patients with hypocitraturic calcium nephrolithiasis or uric acid lithiasis, with or without calcium nephrolithiasis. Hypocitratur ... Full text Link to item Cite

Percutaneous ureterolithotomy.

Journal article J Urol · April 1985 We describe a case of direct percutaneous ureterolithotomy in which the combination of antegrade control, a ureteral stent and precise fluoroscopic imaging resulted in a successful outcome. This technique may be helpful when other more traditional methods ... Full text Link to item Cite

Spontaneously acquired anti-factor VIII antibodies: report of a patient with adenocarcinoma of the prostate.

Journal article J Urol · June 1984 Anti-factor VIII antibodies, inherited or acquired inhibitors of the factor VIII molecule, have not been reported previously in the urological literature. Although more common in hemophiliac patients who have received multiple transfusions, this anticoagul ... Full text Link to item Cite

Acute urinary retention in female patients: diagnosis and treatment.

Journal article J Urol · July 1983 Acute urinary retention in female patients often is attributed to psychogenic disturbances. However, it is apparent that this problem may be the harbinger of significant organic illness. Our experience with 27 patients reveals that careful evaluation and a ... Full text Link to item Cite

Chorioallantoic membrane grafting of the embryonic murine kidney. An improved in vitro technique for studying kidney morphogenesis.

Journal article Invest Urol · March 1981 Previous experimental investigations of embryonic kidney development with in vitro organ culture techniques have been limited by the short duration of explant viability. Utilization of chick chorioallantoic membranes for transplanting undifferentiated muri ... Link to item Cite

Utilization of the chick chorioallantoic membrane for in vitro growth of the embryonic murine kidney.

Journal article Am J Anat · September 1980 Previous experimental investigations of embryonic kidney development with in vitro organ-culture techniques have been limited by the short duration of graft viability and lack of detailed anatomic development. In a modified application of the chick chorioa ... Full text Link to item Cite