Journal articleBr J Anaesth · July 31, 2026
Respiratory failure after surgery and other major invasive procedures, defined as the unanticipated need for invasive or noninvasive ventilation, is a life-threatening complication affecting ∼10 million patients annually. At present, there are no guideline ...
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Journal articleIEEE Rev Biomed Eng · April 28, 2026
Invasive medical interventions or abrupt reductions in ambient pressure can result in intravascular gas embolism. The accumulation of gas bubbles initiates a cascade of pathophysiological phenomena progressing from platelet activation to ischemia and neuro ...
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Journal articleJ Physiol · April 13, 2026
Understanding of pulmonary gas exchange measurements in divers at sea is incomplete. In this study, arterial blood gases (ABGs) were measured in SCUBA divers breathing compressed air and pedalling at depths of 15 or 40 m in seawater (msw). In breath-hold d ...
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Journal articleDiving Hyperb Med · March 31, 2026
INTRODUCTION: Doppler ultrasound measurements have been recorded since the 1970s across the world and provide a valuable data resource for learning, analysis, and potential training of deep learning algorithms to recognise and grade venous gas emboli (VGE) ...
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Journal articleEur J Appl Physiol · March 2026
BACKGROUND: Breath-hold diving (BHD, also referred to as freediving) represents an extreme physiological challenge, requiring adaptations to rapid changes in blood gas levels and hydrostatic pressure. Despite advances in understanding human responses to BH ...
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Journal articleJ Appl Physiol (1985) · August 1, 2025
Ultrasound is currently the optimal imaging modality in the decompression research field for assessing intracorporeal gas. Decompression sickness (DCS) is triggered by excess gas bubble presence in the body; however, the relationship is not well understood ...
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Journal articleHigh Alt Med Biol · June 2025
Yoder, Taylor L., Kreager A. Taber, Laurens E. Howle, and Richard E. Moon. Pushing scuba to new heights: approach, decompression, and logistical considerations for high-altitude diving. High Alt Med Biol. 26:109-117, 2025.-There is interest among technical ...
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Journal articleClin J Pain · April 1, 2025
OBJECTIVES: Complex regional pain syndrome remains a challenging condition characterized by severe, persistent pain and a variety of inflammatory and trophic symptoms. This study aimed to analyze the current literature to evaluate hyperbaric oxygen therapy ...
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Journal articleUndersea Hyperb Med · 2025
Decompression sickness (DCS, "bends") is the clinical condition triggered by generation of bubbles in tissues or blood due to supersaturation of inert gas during or after a reduction in ambient pressure. The condition can occur in association with compress ...
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Journal articleUndersea Hyperb Med · 2025
Gas can enter arteries (arterial gas embolism) due to alveolar-capillary disruption (caused by pulmonary overpressurization, e.g. breath-hold ascent by divers), veins (venous gas embolism, VGE) as a result of tissue bubble formation due to decompression (d ...
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Journal articleCommun Med (Lond) · December 19, 2024
BACKGROUND: Oxygen-rich breathing mixtures up to 100% are used in some underwater diving operations for several reasons. Breathing elevated oxygen partial pressures (PO2) increases the risk of developing central nervous system oxygen toxicity (CNS-OT) whic ...
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Journal articleSensors (Basel) · December 3, 2024
We examined data from Naval Sea Systems Command grant project N0463A-12-C-001, "Hypercapnia: cognitive effects and monitoring", with the objective of validating or repudiating heart rate variability (HRV) as a warning sign of cognitive impairment from divi ...
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Journal articleBiocybernetics and Biomedical Engineering · April 1, 2024
Objective: Breathing elevated oxygen partial pressures (PO2) prior to SCUBA diving increases the risk of developing central nervous system oxygen toxicity (CNS-OT), which could impair performance or result in seizure and subsequent drowning. We ...
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Journal articleUndersea Hyperb Med · 2024
INTRODUCTION: Submersion results in blood redistribution into the pulmonary circulation, causing changes in pulmonary compliance and increased cardiac preload. Few studies have compared incremental exercise to exhaustion (VO2 max testing) in a dry environm ...
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Journal articleFrontiers in Marine Science · January 1, 2024
Background: Current diving physiology postulates that SCUBA divers’ arterial blood gas (ABG) levels vary proportionally to environmental pressure, but, to date, ABGs have only been obtained during simulated dives. Also, recent evidence supports the use of ...
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Journal articleUndersea Hyperb Med · 2024
The term "intracranial abscess" (ICA) includes cerebral abscess, subdural empyema, and epidural empyema, which share many diagnostic and therapeutic similarities and, frequently, very similar etiologies. Infection may occur and spread from a contiguous inf ...
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Journal articleJ Appl Physiol (1985) · October 1, 2023
Pulmonary gas exchange in breath-hold diving (BHD) consists of a progressive increase in arterial partial pressures of oxygen ([Formula: see text]) and carbon dioxide ([Formula: see text]) during descent. However, recent findings have demonstrated that [Fo ...
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Journal articleUltrasound Med Biol · August 2023
OBJECTIVE: For the treatment of tumor hypoxia, microbubbles comprising oxygen as a majority component of the gas core with a stabilizing shell may be used to deliver and release oxygen locally at the tumor site through ultrasound destruction. Previous work ...
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Journal articleIEEE Trans Biomed Eng · May 2023
OBJECTIVE: Doppler ultrasound (DU) is used to detect venous gas emboli (VGE) post dive as a marker of decompression stress for diving physiology research as well as new decompression procedure validation to minimize decompression sickness risk. In this art ...
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Journal articleUndersea Hyperb Med · 2023
As the UHMS observes the distinguished anniversary of the publication of 50 volumes of the Undersea and Hyperbaric Medicine Journal, two of our past editors take a look at the evolution of our flagship publications. ...
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Journal articlePLoS One · 2023
Doppler ultrasound (DU) measurements are used to detect and evaluate venous gas emboli (VGE) formed after decompression. Automated methodologies for assessing VGE presence using signal processing have been developed on varying real-world datasets of limite ...
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Journal articleUndersea and Hyperbaric Medicine · January 1, 2023
The abstract in the above-named paper, which appeared on page 383 of the 49(3) issue, contained an error. It read: “The mean changes in the ICIQ-SF, OAB-V8, and IIQ-7 scores in the third month of treatment in Group 1 were 4.12 ±...” This first number shoul ...
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Journal articlePLoS One · 2023
Doppler ultrasound (DU) is used in decompression research to detect venous gas emboli in the precordium or subclavian vein, as a marker of decompression stress. This is of relevance to scuba divers, compressed air workers and astronauts to prevent decompre ...
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Journal articleToxicol Appl Pharmacol · June 1, 2022
Carbon tetrafluoride (CF4) is an inert gas with higher molecular weight and lower water solubility than commonly used hyperbaric breathing gases. These inert gas properties decrease time required to decompress and avoid decompression sickness after deep di ...
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Journal articleChest · March 2022
Immersion pulmonary edema, more commonly referred to as swimming-induced pulmonary edema (SIPE), is a well-documented condition believed to be a result of immersion physiologic condition that is characterized by a peripheral-to-central redistribution of bl ...
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Journal articleJ Appl Physiol (1985) · February 1, 2022
Pulmonary gas exchange during diving or in a dry hyperbaric environment is affected by increased breathing gas density and possibly water immersion. During free diving, there is also the effect of apnea. Few studies have published blood gas data in underwa ...
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Journal articleAnn Biomed Eng · February 2022
Divers who wish to prolong their time underwater while carrying less equipment often use devices called rebreathers, which recycle the gas expired after each breath instead of discarding it as bubbles. However, rebreathers' need to replace oxygen used by b ...
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Journal articleAnnals of biomedical engineering · February 2022
Divers who wish to prolong their time underwater while carrying less equipment often use devices called rebreathers, which recycle the gas expired after each breath instead of discarding it as bubbles. However, rebreathers' need to replace oxygen used by b ...
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Journal articleFront Physiol · 2022
Hyperbaric Oxygen (HBO2) has been proposed as a pre-conditioning method to enhance exercise performance. Most prior studies testing this effect have been limited by inadequate methodologies. Its potential efficacy and mechanism of action remain unknown. We ...
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Journal articleUndersea Hyperb Med · 2022
INTRODUCTION: The International Multicenter Registry for Hyperbaric Oxygen Therapy (International Report Registered Identifier DERR1-10.2196/18857) was established in 2011 to capture outcomes and complications data for both Undersea and Hyperbaric Medical ...
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Journal articlePhysiol Rep · April 2021
Acute mountain sickness (AMS) occurs when there is failure of acclimatisation to high altitude. The aim of this study was to describe the relationship between physiological variables and the incidence of AMS during ascent to 5300 m. A total of 332 lowland- ...
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Journal articleTransfusion · March 2021
BACKGROUND: Few studies have rigorously assessed the impact of red blood cell (RBC) transfusion on oxygen delivery. Several large trials demonstrated no clinical outcome differences between transfusion of shorter-storage vs prolonged-storage RBCs. These tr ...
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Journal articleUndersea Hyperb Med · 2021
It is widely accepted that bubbles are a necessary but insufficient condition for the development of decompression sickness. However, open questions remain regarding the precise formation and behavior of these bubbles after an ambient pressure reduction (d ...
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Journal articleUndersea Hyperb Med · 2021
Venous gas emboli (VGE) are often quantified as a marker of decompression stress on echocardiograms. Bubble-counting has been proposed as an easy to learn method, but remains time-consuming, rendering large dataset analysis impractical. Computer automation ...
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Journal articleUndersea Hyperb Med · 2021
The term "intracranial abscess" (ICA) includes cerebral abscess, subdural empyema, and epidural empyema, which share many diagnostic and therapeutic similarities and, frequently, very similar etiologies. Infection may occur and spread from a contiguous inf ...
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Journal articleUndersea Hyperb Med · 2021
The SARS-Cov-2 (COVID-19) pandemic remains a major worldwide public health issue. Initially, improved supportive and anti-inflammatory intervention, often employing known drugs or technologies, provided measurable improvement in management. We have recentl ...
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Journal articleUndersea Hyperb Med · 2021
Decompression sickness (DCS, "bends") is caused by formation of bubbles in tissues and/or blood when the sum of dissolved gas pressures exceeds ambient pressure (supersaturation). This may occur when ambient pressure is reduced during any of the following: ...
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Journal articleDiving Hyperb Med · September 30, 2020
Arterial gas embolism (AGE) may result when diving while breathing compressed gas and ascending rapidly or with a closed glottis. Pulmonary over-pressurisation can result in lung stretch injury with entry of bubbles into the pulmonary venous circulation an ...
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Journal articleJ Appl Physiol (1985) · September 1, 2020
Reported incidence of postoperative opioid-induced respiratory depression (OIRD) ranges from 0.5-41% and is not reliably predicted by traditional risk factors. This study tests a new methodology to investigate ventilatory chemosensitivity as a new potentia ...
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Journal articleEur J Appl Physiol · February 2020
PURPOSE: Adaptations during voluntary breath-hold diving have been increasingly investigated since these athletes are exposed to critical hypoxia during the ascent. However, only a limited amount of literature explored the pathophysiological mechanisms und ...
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Journal articleUndersea Hyperb Med · 2020
Recently the internet has been abuzz with new ideas to treat COVID-19, including hyperbaric oxygen (HBO2) therapy, undoubtedly driven by the fact that until recently there have been few therapeutic options for this highly contagious and often lethal infect ...
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Journal articleJ Perianesth Nurs · February 2019
PURPOSE: Obstructive sleep apnea (OSA) is a breathing disorder found in surgical patients and associated with complications in the postoperative period. The implementation of a preoperative universal screening process using the STOP-BANG questionnaire to i ...
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Journal articleA A Pract · November 15, 2018
There have been many complications associated with transurethral resection of the prostate (TURP), known as TURP syndrome. Of the various irrigation fluids used for TURP, glycine irrigant has been historically popular given its relatively low cost. It is a ...
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Journal articleClin Pharmacol Ther · September 2018
Disruption of microvascular blood flow is a common cause of tissue hypoxia in disease, yet no therapies are available that directly target the microvasculature to improve tissue oxygenation. Red blood cells (RBCs) autoregulate blood flow through S-nitroso- ...
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Journal articlePhysiol Rep · September 2018
Electronic nose (e-nose) devices may be used to identify volatile organic compounds (VOCs) in exhaled breath. VOCs generated via metabolic processes are candidate biomarkers of (patho)physiological pathways. We explored the feasibility of using an e-nose t ...
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Journal articleJ Aerosol Med Pulm Drug Deliv · April 2018
The 21st Congress for the International Society for Aerosols in Medicine included, for the first time, a session on Pulmonary Delivery of Therapeutic and Diagnostic Gases. The rationale for such a session within ISAM is that the pulmonary delivery of gaseo ...
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Journal articleJAMA Otolaryngol Head Neck Surg · March 1, 2018
IMPORTANCE: Self-contained underwater breathing apparatus (scuba) diving has become increasingly popular with millions of people diving each year. Otorhinolaryngologists are often consulted either by patients or diving physicians regarding fitness to dive, ...
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Journal articleJAMA Otolaryngol Head Neck Surg · March 1, 2018
IMPORTANCE: Scuba diving is becoming increasingly popular. However, scuba diving is associated with specific risks; 80% of adults and 85% of juvenile divers (aged 6-17 years) have been reputed to have an ear, nose, or throat complaint related to diving at ...
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Journal articleFront Psychol · 2018
Man's experience and exploration of the underwater environment has been recorded from ancient times and today encompasses large sections of the population for sport enjoyment, recreational and commercial purpose, as well as military strategic goals. Knowle ...
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Journal articleUndersea Hyperb Med · 2018
INTRODUCTION: Patients with prior primary spontaneous pneumothorax (PSP) frequently seek clearance to dive. Despite wide consensus in precluding compressed-air diving in this population, there is a paucity of data to support this decision. We reviewed the ...
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Journal articleFront Physiol · 2018
The present study aimed to evaluate the partial pressure of arterial blood gases in breath-hold divers performing a submersion at 40 m. Eight breath-hold divers were enrolled for the trials held at "Y-40 THE DEEP JOY" pool (Montegrotto Terme, Padova, Italy ...
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Journal articleMed Sci Sports Exerc · September 2017
Featured Publication
Swimming-induced pulmonary edema (SIPE) occurs during swimming and scuba diving, usually in cold water, in susceptible healthy individuals, especially military recruits and triathletes. We have previously demonstrated that pulmonary artery (PA) pressure an ...
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Journal articleBMJ Case Rep · May 30, 2017
Pneumatosis intestinalis (PI), or the presence of air in the bowel wall, is a rare disorder that is associated with a variety of underlying diseases, including connective tissue disorders. PI presents on a spectrum from asymptomatic to bowel obstruction an ...
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Journal articleJ Surg Res · April 2017
BACKGROUND: Marriage is linked to substantial societal and economic benefits, and it has been associated with improved outcomes following acute illness. However, it is not known if being married confers benefit to patients undergoing noncardiac surgical pr ...
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Journal articleTransfusion · March 2017
BACKGROUND: Randomized trials, for example, RECESS, comparing "young" (median, 7-day) versus "middle-aged" (median, 28-day) red blood cells (RBCs), showed no difference in outcome. These data are important; however, they do not inform us about the safety a ...
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Journal articleUndersea Hyperb Med · 2017
The American College of Emergency Physicians (ACEP) recently published its official policy on the evaluation and management of patients with acute carbon monoxide (CO) poisoning [1], an update of the policy previously published in 2008. Three questions reg ...
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Journal articleUndersea Hyperb Med · 2017
Arterial gas embolism (AGE) can be clinically devastating, and is most often associated with exposure to changes in ambient pressure, medical procedure or congenital malformation. Here we report a case of AGE in a 78-year-old male without these traditional ...
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Journal articleUndersea Hyperb Med · 2017
Carbon dioxide (CO₂) retention, or hypercapnia, is a known risk of diving that can cause mental and physical impairments leading to life-threatening accidents. Often, such accidents occur due to elevated inspired carbon dioxide. For instance, in cases of C ...
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Journal articleFront Physiol · 2017
Featured Publication
Swimming induced pulmonary edema (SIPE) is a complication that can occur during exercise with the possibility of misdiagnosis and can quickly become life threatening; however, medical literature infrequently describes SIPE. Therefore, the aim of this revie ...
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Journal articlePerioper Med (Lond) · 2017
BACKGROUND: While enhanced recovery protocols (ERPs) reduce physiologic stress and improve outcomes in general, their effects on postoperative renal function have not been directly studied. METHODS: Patients undergoing major colorectal surgery under ERP (F ...
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Journal articleCase Rep Anesthesiol · 2017
Paragangliomas and pheochromocytomas are rare neuroendocrine tumors that can have high morbidity and mortality if undiagnosed. Here we report a case of an undiagnosed paraganglioma in a 58-year-old female who underwent tumor resection. The patient became s ...
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Journal articleUndersea Hyperb Med · 2017
Rebreather diving has one of the highest fatality rates per man hour of any diving activity in the world. The leading cause of death is hypoxia, typically from equipment or procedural failures. Hypoxia causes very few symptoms prior to causing loss of cons ...
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Journal articleJ Appl Physiol (1985) · October 1, 2016
Diving narcosis results from the complex interaction of gases, activities, and environmental conditions. We hypothesized that these interactions could be separated into their component parts. Where previous studies have tested single cognitive tasks sequen ...
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Journal articleCirculation · March 8, 2016
BACKGROUND: Swimming-induced pulmonary edema (SIPE) occurs during swimming or scuba diving, often in young individuals with no predisposing conditions, and its pathophysiology is poorly understood. This study tested the hypothesis that pulmonary artery and ...
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Journal articleForensic Sci Int · March 2016
On the evening of February 17th, 1864, the Confederate submarine H.L. Hunley attacked the Union ship USS Housatonic outside Charleston, South Carolina and became the first submarine in history to successfully sink an enemy ship in combat. One hypothesis fo ...
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Journal articleSci Rep · February 5, 2016
Evidence is mixed for an association between serum insulin-like growth factor-I (IGF-I) levels and postoperative delirium (POD). The current study assessed preoperative serum IGF-I levels as a predictor of incident delirium in non-demented elderly elective ...
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Journal articleBMJ Open Sport Exerc Med · 2016
BACKGROUND/AIM: To address the question as to whether immersion pulmonary oedema (IPO) may be a common cause of death in triathlons, markers of swimming-induced pulmonary oedema (SIPO) susceptibility were sought in triathletes' postmortem examinations. MET ...
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Journal articleAm J Physiol Lung Cell Mol Physiol · October 15, 2015
The heme oxygenase-1 (HO-1)/carbon monoxide (CO) system induces mitochondrial biogenesis, but its biological impact in human skeletal muscle is uncertain. The enzyme system generates CO, which stimulates mitochondrial proliferation in normal muscle. Here w ...
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Journal articleCompr Physiol · September 20, 2015
Water covers over 70% of the earth, has varying depths and temperatures and contains much of the earth's resources. Head-out water immersion (HOWI) or submersion at various depths (diving) in water of thermoneutral (TN) temperature elicits profound cardior ...
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Journal articleA A Case Rep · September 15, 2015
Arterial gas embolism can be caused by direct entry of gas into systemic arteries or indirectly by venous-to-arterial shunting. Although arterial gas embolism is rare, most documented cases are iatrogenic, resulting from the entry of gas during procedures ...
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Journal articleMed Sci Sports Exerc · June 2015
PURPOSE: Immersion pulmonary edema (IPE) occurs in swimmers (especially triathletes) and scuba divers. Its pathophysiology and risk factors are incompletely understood. This study was designed to establish the prevalence of preexisting comorbidities in ind ...
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Journal articleUndersea Hyperb Med · 2015
A hookah smoker who was treated for severe carbon monoxide poisoning with hyperbaric oxygen reported using a different type of charcoal prior to hospital admission, i.e., quick-light charcoal. This finding led to a study aimed at determining whether CO pro ...
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Journal articleJ Appl Physiol (1985) · August 15, 2014
Hyperoxia during diving has been suggested to exacerbate hypercapnic narcosis and promote unconsciousness. We tested this hypothesis in male volunteers (12 at rest, 10 at 75 W cycle ergometer exercise) breathing each of four gases in a hyperbaric chamber. ...
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Journal articleAnesth Analg · May 2014
BACKGROUND: Goal-directed fluid therapy (GDFT) is associated with improved outcomes after surgery. The esophageal Doppler monitor (EDM) is widely used, but has several limitations. The NICOM, a completely noninvasive cardiac output monitor (Cheetah Medical ...
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Journal articleAnesth Analg · May 2014
BACKGROUND: Enhanced recovery after surgery (ERAS) is a multimodal approach to perioperative care that combines a range of interventions to enable early mobilization and feeding after surgery. We investigated the feasibility, clinical effectiveness, and co ...
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Journal articleHandb Clin Neurol · 2014
Diving exposes a person to the combined effects of increased ambient pressure and immersion. The reduction in pressure when surfacing can precipitate decompression sickness (DCS), caused by bubble formation within tissues due to inert gas supersaturation. ...
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Journal articleUndersea and Hyperbaric Medicine · January 1, 2014
Gas can enter arteries (arterial gas embolism) due to alveolar-capillary disruption (caused by pulmonary overpressurization, e.g., breath-hold ascent by divers) or veins (venous gas embolism, VGE) as a result of tissue bubble formation due to decompression ...
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Journal articleUndersea Hyperb Med · 2014
Gas can enter arteries (arterial gas embolism) due to alveolar-capillary disruption (caused by pulmonary overpressurization, e.g., breath-hold ascent by divers) or veins (venous gas embolism, VGE) as a result of tissue bubble formation due to decompression ...
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Journal articleUndersea Hyperb Med · 2014
Decompression sickness (DCS) is a clinical syndrome occurring usually within 24 hours of a reduction in ambient pressure. DCS occurs most commonly in divers ascending from a minimum depth of 20 feet (6 meters) of sea water, but can also occur during rapid ...
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Journal articleChest · October 2013
BACKGROUND: Fluorine-enhanced MRI is a relatively inexpensive and straightforward technique that facilitates regional assessments of pulmonary ventilation. In this report, we assess its suitability through the use of perfluoropropane (PFP) in a cohort of h ...
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Journal articleIntensive Care Med · July 2012
PURPOSE: Necrotising soft tissue infection (NSTI) is a deadly disease associated with a significant risk of mortality and long-term disability from limb and tissue loss. The aim of this study was to determine the effect of hyperbaric oxygen (HBO(2)) therap ...
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Journal articleJ Oral Maxillofac Surg · July 2012
PURPOSE: This study tested hyperbaric oxygen (HBO) as an adjunct to surgery and antibiotics in the treatment of bisphosphonate-related osteonecrosis of the jaw (ONJ) and evaluated its effects on gingival healing, pain, and quality of life. MATERIALS AND ME ...
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Journal articleAnesthesiology · April 2012
BACKGROUND: Postoperative delirium, a common complication in the elderly, can occur following any type of surgery and is associated with increased morbidity and mortality; it may also be associated with subsequent cognitive problems. Effective therapy for ...
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Journal articleUndersea Hyperb Med · 2012
INTRODUCTION: Supplemental oxygen has been reported to cause pulmonary complications after bleomycin. We describe the safe administration of hyperbaric oxygen (HBO2) after bleomycin in 15 patients. METHODS: Paper and electronic records were reviewed for bl ...
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Journal articleUndersea Hyperb Med · 2012
The Diving Committee of the Undersea and Hyperbaric Medical Society has reviewed available evidence in relation to the medical aspects of rescuing a submerged unresponsive compressed-gas diver. The rescue process has been subdivided into three phases, and ...
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Journal articleUndersea Hyperb Med · 2012
Idiopathic sudden sensorineural hearing loss (ISSHL) is the newest indication approved by the Undersea and Hyperbaric Medical Society's Hyperbaric Oxygen Therapy Committee. Idiopathic sudden sensorineural hearing loss appears to be characterized by hypoxia ...
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Journal articleJ Appl Physiol (1985) · March 2011
Hyperoxia has been shown to attenuate the increase in pulmonary artery (PA) pressure associated with immersed exercise in thermoneutral water, which could serve as a possible preventive strategy for the development of immersion pulmonary edema (IPE). We te ...
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Journal articleLancet · January 8, 2011
Featured Publication
Decompression illness is caused by intravascular or extravascular bubbles that are formed as a result of reduction in environmental pressure (decompression). The term covers both arterial gas embolism, in which alveolar gas or venous gas emboli (via cardia ...
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Journal articleJ Appl Physiol (1985) · July 2010
Featured Publication
Immersion pulmonary edema (IPE) can occur in otherwise healthy swimmers and divers, likely because of stress failure of pulmonary capillaries secondary to increased pulmonary vascular pressures. Prior studies have revealed progressive increase in ventilati ...
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Journal articleInt J Radiat Oncol Biol Phys · November 1, 2009
PURPOSE: To elucidate long-term outcomes in 65 consecutive patients meeting a uniform definition of mandibular osteoradionecrosis (ORN) treated with multimodality therapy including hyperbaric oxygen (HBO). METHODS AND MATERIALS: Pretreatment, post-treatmen ...
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Journal articleAm J Physiol Heart Circ Physiol · July 2009
Given that the physiology of heme oxygenase-1 (HO-1) encompasses mitochondrial biogenesis, we tested the hypothesis that the HO-1 product, carbon monoxide (CO), activates mitochondrial biogenesis in skeletal muscle and enhances maximal oxygen uptake (Vo(2m ...
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Journal articleDiving Hyperb Med · June 2009
Therapeutic interventions may augment the outcome or provide temporizing support pending recompression. Effective measures include first aid (surface) oxygen therapy, fluid resuscitation, non-steroidal anti-inflammatory drugs and avoidance of fever. Lignoc ...
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Journal articleJ Appl Physiol (1985) · February 2009
Featured Publication
Diving-related pulmonary effects are due mostly to increased gas density, immersion-related increase in pulmonary blood volume, and (usually) a higher inspired Po(2). Higher gas density produces an increase in airways resistance and work of breathing, and ...
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Journal articleJ Appl Physiol (1985) · February 2009
Featured Publication
Immersion pulmonary edema (IPE) is a condition with sudden onset in divers and swimmers suspected to be due to pulmonary arterial or venous hypertension induced by exercise in cold water, although it does occur even with adequate thermal protection. We tes ...
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Journal articleJ Appl Physiol (1985) · January 2009
Featured Publication
During diving, arterial Pco(2) (Pa(CO(2))) levels can increase and contribute to psychomotor impairment and unconsciousness. This study was designed to investigate the effects of the hypercapnic ventilatory response (HCVR), exercise, inspired Po(2), and ex ...
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Journal articleJ Oral Maxillofac Surg · July 2007
PURPOSE: Bisphosphonate (BP)-associated osteonecrosis of the jaw (ONJ) is an emerging problem with few therapeutic options. Our pilot study of BP-ONJ investigated a possible role for hyperbaric oxygen (HBO(2)) therapy. PATIENTS AND METHODS: A total of 16 p ...
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Journal articleUndersea Hyperb Med · 2007
INTRODUCTION: First aid oxygen (FAO2) has been widely used as an emergency treatment for diving injuries, but there are few studies supporting its efficacy. METHODS: 2,231 sequential diving injury reports collected by the Divers Alert Network (DAN) Injury ...
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Journal articleComplexity · January 1, 2007
In the past two decades the biomedical community has witnessed several applications of nonlinear system theory to the analysis of biomedical time series and the development of nonlinear dynamic models. The development of this area of medicine can best be d ...
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Journal articleAviat Space Environ Med · May 2006
BACKGROUND: Candidates for commercial spaceflight may be older than the typical astronaut and more likely to have medical problems that place them at risk during flight. Since the effects of microgravity on many medical conditions are unknown, physicians h ...
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Journal articleRespir Physiol Neurobiol · February 15, 2005
To test the hypothesis that the fractal character of breathing and heart rate are independent, inter-breath intervals (IBI) and R-R intervals (RRI) were measured during rest and two levels of exercise at 1 and 2.8 ATA in a hyperbaric chamber in 18 male and ...
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Journal articleUndersea Hyperb Med · 2004
Insulin-requiring diabetes mellitus (IRDM) is commonly described as an absolute contraindication to scuba diving. A 1993 Divers Alert Network survey, however, identified many active IRDM divers. We report on the plasma glucose response to recreational divi ...
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Journal articleAviat Space Environ Med · December 2003
BACKGROUND: Severe decompression illness (DCI) could be more likely in cigarette smokers because of airway obstruction or vascular disease. The present study evaluated the severity of DCI as a function of cigarette smoking in recreational divers. METHODS: ...
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Journal articleJ Clin Anesth · June 2003
STUDY OBJECTIVE: To determine the necessity for ionized magnesium (iMg) assay by evaluating the effect of abdominal surgery without massive transfusion on total magnesium (Mg) and iMg concentrations. DESIGN: Prospective, observational study. SETTING: Opera ...
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Journal articleJ Appl Physiol (1985) · February 2003
Featured Publication
Physiological dead space (Vds), end-tidal CO(2) (Pet(CO(2))), and arterial CO(2) (Pa(CO(2))) were measured at 1 and 2.8 ATA in a dry hyperbaric chamber in 10 older (58-74 yr) and 10 younger (19-39 yr) air-breathing subjects during rest and two levels of up ...
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Journal articleEmerg Med (Fremantle) · December 2002
Water immersion is a frequent cause of accidental death and hospital admission. This article outlines the pathogenesis and principles of treatment. Drowning is defined as death by asphyxia due to submersion in a liquid medium. Near-drowning is defined as i ...
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Journal articleNat Med · July 2002
Interactions of nitric oxide (NO) with hemoglobin (Hb) could regulate the uptake and delivery of oxygen (O(2)) by subserving the classical physiological responses of hypoxic vasodilation and hyperoxic vasconstriction in the human respiratory cycle. Here we ...
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Journal articleClin Chim Acta · March 2001
This study evaluated the accuracy of the Precision PCx (PCx) against another bedside blood glucose meter SureStepPro (SSP), which has been shown to be unaffected by high P(O(2)). Human blood samples were used to prepare plasma glucose (PG) concentrations o ...
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Journal articleSouth Pacific Underwater Medicine Society Journal · December 1, 2000
This study was designed to evaluate the accuracy of the bedside glucometer SureStepPro (SSP, LifeScan Inc; Milpitas, California) against a standard laboratory instrument (Yellow Springs Instruments [YSI] 2300 STAT PLUS; Yellow Springs, Ohio) during hyperba ...
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Journal articleSouth Pacific Underwater Medicine Society Journal · September 1, 2000
In an ideal world all divers with decompression illness would receive immediate expert assessment and recompression treatment with or without the necessary adjunctive therapy to maintain blood pressure and ensure appropriate pulmonary gas exchange. However ...
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Journal articleSouth Pacific Underwater Medicine Society Journal · September 1, 2000
It is conceivable that, under some circumstances, shallower recompression depths, or even surface treatment, may achieve a similar degree of success. But, because 18 m recompression is so successful, the burden of proof remains on the side of individuals s ...
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Journal articleUrology · July 2000
OBJECTIVES: To characterize patients with primary necrotizing fasciitis of the male genitalia (Fournier's gangrene) and to identify risk factors and prognostic variables of survival. METHODS: Fifty consecutive patients with primary necrotizing fasciitis of ...
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Journal articleAnn Otol Rhinol Laryngol · June 2000
Laryngeal radionecrosis is a difficult late complication of radiotherapy. It is associated with hoarseness, edema, pain, weight loss, and upper airway obstruction. The medical treatment options are limited, and in severe cases, the patient may require trac ...
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Journal articleSouth Pacific Underwater Medicine Society Journal · March 1, 2000
The initial observations in the 19th century of DCS in compressed air workers and divers revealed a disease that could cause severe neurological injury and death, but would often surprisingly resolve spontaneously. The standard of care for this illness tod ...
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Journal articleRespir Care Clin N Am · June 1999
Necrotizing soft-tissue infections are rapidly spreading bacterial infections that account for a relatively small proportion of infections, but are aggressive in nature and nearly uniformly fatal if left untreated. Prompt recognition, antibiotic therapy, a ...
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Journal articleCrit Care Clin · April 1999
Recognition of condition attributable to the environmental changes experienced by divers will facilitate appropriate treatment. The diagnosis of these conditions rarely requires sophisticated imaging or electrophysiologic testing. Divers who have suspected ...
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Journal articleRespir Care Clin N Am · March 1999
Hyperbaric oxygen technology now occupies a legitimate place in modern medical practice, and the number of clinically active hyperbaric facilities has grown. We estimate that more than 200 monoplace (single-patient) chambers and over two dozen multiplace f ...
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Journal articleRespir Care Clin N Am · March 1999
The mainstay of treatment of gas bubble disease is therapeutic recompression while the patient is breathing oxygen. The patient should be recompressed as soon as possible; however, patients should be considered for recompression even after several days' de ...
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Journal articleRespir Care Clin N Am · March 1999
Multiplace hyperbaric chambers can be used to deliver patient care with enormous flexibility. Standard critical care techniques, such as mechanical ventilation, endotracheal suctioning, hemodynamic monitoring, blood gas measurement, and emergency therapy s ...
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Journal articleSouth Pacific Underwater Medicine Society Journal · January 1, 1999
Surface oxygen appears to be efficacious, at least whenever there is some delay to recompression treatment. First aid measures should ideally include airway management and assuring adequacy of ventilation, fluid resuscitation and maintenance of blood press ...
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Journal articleJ South Orthop Assoc · 1998
To establish the success rate of combined therapy for tibial osteomyelitis, we reviewed all cases of this infection treated with surgery, antibiotics, and hyperbaric oxygen (HBO) between 1974 and 1991 at Duke University Medical Center. The median delay fro ...
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Journal articleJ Crit Care · June 1997
PURPOSE: The effects of prolonged positive pressure ventilation on lung ultrastructure are not well defined in primates. This study was designed to measure cardiopulmonary and morphological responses to 4 days of positive pressure ventilation in normal bab ...
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Journal articleAcad Emerg Med · March 1997
OBJECTIVES: Loxosceles reclusa (brown recluse) spider bites can produce severe skin lesions that may necessitate extensive surgical repair. This study delineated the effects of hyperbaric oxygen (HBO) therapy on these lesions by performing a prospective co ...
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Journal articleRespir Physiol · August 1996
Hypoxemia in bacterial sepsis develops by mechanisms which are incompletely understood. In this study, we measured pulmonary gas exchange in eight baboons to determine the causes of hypoxemia after infusion of live Escherichia coli (1 x 10(10) CFU/kg) foll ...
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Journal articleJ Appl Physiol (1985) · May 1995
Prolonged exposure to O2 causes diffuse alveolar damage and surfactant dysfunction that contribute to the pathophysiology of hyperoxic lung injury. We hypothesized that exogenous surfactant would improve lung function during O2 exposure in primates. Sixtee ...
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Journal articleOtolaryngol Head Neck Surg · February 1995
Hyperbaric oxygen therapy has significantly improved the management of necrotizing fasciitis of the extremities and trunk. Its role in cervical necrotizing fasciitis has not been fully evaluated. Historically, necrotizing fasciitis has been associated with ...
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Journal articleUndersea Hyperb Med · June 1994
The objective assessment of the extent of cerebral insult and the effects of therapy in decompression injury patients has proven to be difficult by most imaging modalities. In this pilot study we evaluated the ability of 18-F-2-fluoro-2-deoxyglucose (FDG) ...
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Journal articleJ Appl Physiol (1985) · March 1994
Surfactant dysfunction contributes to the pathophysiology of adult respiratory distress syndrome (ARDS), and we hypothesized that surfactant treatment would improve experimental ARDS produced by continuous exposure to hyperoxia. Twelve healthy male baboons ...
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Journal articleAm J Vet Res · May 1993
We evaluated the effects of clenbuterol HCl (0.8 micrograms/kg, of body weight, IV), a beta 2 agonist, on ventilation-perfusion matching and hemodynamic variables in anesthetized (by IV route), laterally recumbent horses. The multiple inert gas elimination ...
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Journal articleUndersea Biomed Res · July 1992
Four subjects were compressed to a simulated depth of 450 msw (46 bar) for 37 days in the main research chamber of the German underwater simulator diving facility at the GKSS Research Center, Geesthacht. The ambient gas was trimix. Urine was collected at 0 ...
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Journal articleUndersea Biomed Res · July 1992
Platelet counts were measured in 10 divers during the course of 4 experimental deep dives (450 and 600 m) and different anticoagulants were tested. The use of sodium citrate as an anticoagulant was associated with artifactual thrombocytopenia, whereas ethy ...
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Journal articleUndersea Biomed Res · July 1992
Urinary vasopressin (VP), aldosterone (ALDO), osmotic substances, sodium excretion, and plasma volume were assessed in 4 healthy male divers during 2 predive control days, 2 compression days, 6 days at 46 atm abs, and 26 days of decompression with stops at ...
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Journal articleJ Occup Med · January 1992
We reviewed over 220 cases of acute carbon monoxide (CO) poisoning and now report on 17 patients whose poisoning occurred from the indoor use of propane-fueled forklifts. All patients in this series presented with neurologic symptoms or persistent headache ...
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Journal articleJ Comput Assist Tomogr · 1992
Unilateral absence of a pulmonary artery, more accurately referred to as unilateral proximal interruption of a pulmonary artery, is a rare congenital anomaly that may occur as an isolated lesion or in association with other congenital cardiovascular abnorm ...
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Journal articleProblems in Urology · January 1, 1992
Patients at increased risk of perioperative complications can almost always be identified by history and physical examination. Batteries of routine preoperative tests generally are unhelpful. Common preoperative problems have been discussed and relevant so ...
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Journal articleUndersea Biomed Res · July 1991
Complement activity has been linked to decompression sickness (DCS), but the effects of intravascular bubbles on complement activation are poorly understood. We have investigated intravascular complement activation by measuring red blood cell (RBC)-bound C ...
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Journal articleSouth Med J · June 1991
Recommendations concerning postoperative extubation after thymectomy for myasthenia gravis are presently based upon retrospective chart reviews. We present the results of a prospective investigation of time to extubation after thymectomy for 14 patients ov ...
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Journal articleJ Appl Physiol (1985) · September 1990
The effects of mild hypoxia on brain oxyhemoglobin, cytochrome a,a3 redox status, and cerebral blood volume were studied using near-infrared spectroscopy in eight healthy volunteers. Incremental hypoxia reaching 70% arterial O2 saturation was produced in n ...
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Journal articleAviat Space Environ Med · August 1990
This descriptive, nonrandomized, multicenter-based study compares the treatment outcomes of two major categories of recompression treatment tables for recreational sport SCUBA divers suffering from decompression sickness and/or arterial gas embolism. Strat ...
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Journal articleAm J Forensic Med Pathol · June 1990
A 69-year-old woman underwent hyperbaric oxygen therapy because of a nonhealing ulcer of her foot. During decompression, she developed a left-sided hemiplegia and confusion. Recompression resulted in transient neurologic improvement, but she eventually bec ...
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Journal articleCrit Care Clin · January 1990
In conclusion, HBO constitutes an important therapeutic tool in managing a variety of syndromes associated with trauma and is thought to possess potential benefits for the management of others. Because its therapeutic efficacy and limitations are as yet in ...
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Journal articleLancet · March 11, 1989
30 patients with a history of decompression sickness were examined for the presence of patent foramen ovale by bubble contrast, two-dimensional echocardiography and colour flow doppler imaging. With bubble contrast, 11 (37%) of the patients had right-to-le ...
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Journal articleAnesth Analg · March 1989
The effect of epidural lidocaine on spinal cord blood flow (SCBF) was measured in mongrel dogs. Spinal evoked potentials were used to measure spinal cord conduction and enabled us to time the measurement of SCBF associated with maximum reduction in latency ...
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Journal articleJAMA · February 17, 1989
Carbon monoxide (CO) is the leading cause of death due to poisoning. Although uncommon, CO poisoning does occur during pregnancy and can result in fetal mortality and neurological malformations in fetuses who survive to term. Uncertainty arises regarding t ...
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Journal articleAJR Am J Roentgenol · November 1988
Diving accidents related to barotrauma constitute a unique subset of ischemic insults to the CNS. Victims may demonstrate components of arterial gas embolism, which has a propensity for cerebral involvement, and/or decompression sickness, with primarily sp ...
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Journal articleRev Infect Dis · 1988
The therapy of rhinocerebral mucormycosis includes aggressive surgical debridement, administration of high-dose amphotericin B, and control of underlying predisposing conditions, especially diabetes and immunosuppression or immunodeficiency. Hyperbaric oxy ...
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Journal articleAmerican Journal of Neuroradiology · January 1, 1988
Diving accidents related to barotrauma constitute a unique subset of ischemic insults to the CNS. Victims may demonstrate components of arterial gas embolism, which has a propensity for cerebral involvement, and/or decompression sickness, with primarily sp ...
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Journal articleJ Appl Physiol (1985) · July 1986
In a previous study of normal subjects exercising at sea level and simulated altitude, ventilation-perfusion (VA/Q) inequality and alveolar-end-capillary O2 diffusion limitation (DIFF) were found to increase on exercise at altitude, but at sea level the ch ...
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Journal articleChest · June 1986
The Monaghan 225 ventilator was tested to ambient pressures of 6 atmospheres absolute (ATA) in a hyperbaric chamber. The ventilator would function with delivered tidal volume which was independent of ambient pressure. Ventilatory rate declined in an expone ...
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Journal articleJ Appl Physiol (1985) · March 1985
The relative roles of ventilation-perfusion (VA/Q) inequality, alveolar-capillary diffusion resistance, postpulmonary shunt, and gas phase diffusion limitation in determining arterial PO2 (PaO2) were assessed in nine normal unacclimatized men at rest and d ...
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Journal articleJ Appl Physiol (1985) · March 1985
To investigate the effects of both exercise and acute exposure to high altitude on ventilation-perfusion (VA/Q) relationships in the lungs, nine young men were studied at rest and at up to three different levels of exercise on a bicycle ergometer. Altitude ...
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Journal articleJ Appl Physiol Respir Environ Exerc Physiol · October 1984
Five male volunteers served as subjects for exercise studies during three dives to pressures of 47 and 66 ATA while breathing gases containing 0.5 ATA PO2 and varying amounts of N2 and He. The inspired gas density ranged from 1.1 g/l (BTPS) at the surface ...
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Journal articleAnnals of Otology Rhinology and Laryngology · January 1, 1982
A bench test apparatus has been described that can measure the frequency spectra of isolated human larynges and reed sound sources within an artificial larynx. Objective criteria have been stated, whenever possible, by which artificial sound sources may be ...
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Journal articleAnnals of Otology Rhinology and Laryngology · January 1, 1982
We have presented the specifications for an endotracheal artificial larynx and discussed the design alternatives we considered to meet these specifications. We have described the basic construction of our larynx and discussed the electronic design in detai ...
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Journal articleAnnals of Otology Rhinology and Laryngology · January 1, 1982
This article deals with the evaluation of the effectiveness of the artificial larynx in preventing aspiration, and the assessment of tissue reaction caused by it. ...
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Journal articleJ Otolaryngol · February 1981
In experimental animals a one stage surgical procedure has been developed which at laryngectomy allows for the creation of a wide and patent tracheopharyngeal fistula. An endotracheal artificial larynx has been developed which has been found effective in p ...
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Journal articleJ Pharm Sci · May 1980
This paper considers the steady-state plasma drug concentration in a one-compartment, open pharmacokinetic model with multiple doses and first-order kinetics using a classical deterministic technique as well as a queueing theoretical stochastic analysis. T ...
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Journal articleJournal of Clinical Computing · January 1, 1979
The rationale, theory and outline of a medical diagnostic system based on fuzzy set theory have been presented. The hope is that such a system, when fully developed, will be able to simulate non-quantitative human reasoning. Preliminary computer runs have ...
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Journal articleUndersea Hyperb Med
Gas can enter arteries (arterial gas embolism, AGE) due to alveolar-capillary disruption (caused by pulmonary over-pressurization, e.g. breath-hold ascent by divers) or veins (venous gas embolism, VGE) as a result of tissue bubble formation due to decompre ...
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Journal articleUndersea Hyperb Med
Decompression sickness (DCS, "bends") is caused by formation of bubbles in tissues and/or blood when the sum of dissolved gas pressures exceeds ambient pressure (supersaturation). This may occur when ambient pressure is reduced during any of the following: ...
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Journal articleUndersea Hyperb Med
Immersion pulmonary (IPE, also known as swimming-induced pulmonary edema, SIPE) is a condition in which pulmonary edema develops rapidly during a dive or vigorous swim. Symptoms include dyspnea and hemoptysis. Physical exam reveals typical signs of bilater ...
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