Scholars@Duke

• Background
• 

  Education, Training, & Certifications

  • M.D., Armed Forces Medical College (India) 1979
• 

  Previous Appointments & Affiliations

  • Vice-Chair of Education in the Department of Surgery, Surgery, Clinical Science Departments 2008 - 2021
  • Professor in Psychiatry and Behavioral Sciences, Psychiatry, Child & Family Mental Health & Community Psychiatry, Psychiatry & Behavioral Sciences 2018 - 2021
  • Associate Professor of Surgery, Surgery, Minimally Invasive Surgery, Surgery 2013 - 2017
  • Associate Professor in Psychiatry and Behavioral Sciences, Psychiatry, Child & Family Mental Health & Community Psychiatry, Psychiatry & Behavioral Sciences 2017
  • Associate Professor in Psychiatry and Behavioral Sciences, Psychiatry & Behavioral Sciences, Clinical Science Departments 2013 - 2017
  • Associate Professor of Psychiatry and Behavioral Sciences, Psychiatry & Behavioral Sciences, Clinical Science Departments 2009 - 2013
  • Associate Professor of Surgery, Surgery, Minimally Invasive Surgery, Surgery 2009 - 2013
  • Instructor, Temporary in the Department of Surgery, Surgery, Clinical Science Departments 2008 - 2009
• Recognition
• 

  In the News

  • APR 20, 2015

    Newsweek

    Dr. Ranjan Sudan quoted: A robot that can insert catheters, coming soon to a hospital near you
• Research
• 

  Selected Grants

  • Usability of the Senhance Surgical Robotics System awarded by TransEnterix, Inc 2017 - 2020
  • Evaluating the Feasibility and Effectiveness of Telementoring for Teaching Laparoscopic Skills Across Continents awarded by Association for Surgical Education Foundation 2014 - 2018
  • Development and Statewide Implementation of a Fundamentals of Endoscopic Surgery awarded by The Trustees of Indiana University 2017 - 2018
  • Development and Statewide Implementation of a Fundamentals of Endoscopic Surgery awarded by Carolinas HealthCare System 2015 - 2016
  • Fundamentals of Robotic Surgery: Curriculum and Technical Validation Skills awarded by Institute for Surgical Excellence 2014 - 2016
• 

  External Relationships

  • American College of Surgeons
  • Medtronic
• Publications & Artistic Works
• 

  Selected Publications

  • Academic Articles

    • Bardaro, Sergio J., Alfredo D. Guerron, John Romanelli, Ian Soriano, Keith King, Karen E. Gibbs, Anthony Petrick, et al. “Gastroparesis: an evidence-based review for the bariatric and foregut surgeon.” Surg Obes Relat Dis 19, no. 5 (May 2023): 403–20. https://doi.org/10.1016/j.soard.2023.02.018.
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    • Rampp, N., and R. Sudan. “Robotic Bariatric Surgery: An Update.” Current Surgery Reports 11, no. 4 (April 1, 2023): 73–80. https://doi.org/10.1007/s40137-023-00353-0.
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    • Yu, Alice Yunzi L., Yoshiko Iwai, Samantha M. Thomas, Georgia M. Beasley, Ranjan Sudan, and Oluwadamilola M. Fayanju. “Diversity Among Surgical Faculty, Residents, and Oncology Fellows from 2011/2012 to 2019/2020.” Ann Surg Oncol 29, no. 5 (May 2022): 2763–65. https://doi.org/10.1245/s10434-021-11170-z.
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    • Shabahang, Mohsen M., Adegoke A. Adetunji, Brian J. Daley, Ebondo Mpinga, Ranjan Sudan, Areti Tillou, Patrice G. Blair, et al. “American College of Surgeons Objective Assessment of Skills in Surgery (ACS OASIS): A Formative Assessment of Junior Residents' Technical Skills.” J Surg Educ 79, no. 6 (2022): e194–201. https://doi.org/10.1016/j.jsurg.2022.07.007.
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    • Satava, Richard M., Dimitrios Stefanidis, Jeffrey S. Levy, Roger Smith, John R. Martin, Sara Monfared, Lava R. Timsina, et al. “Response to the Comment on "Proving the Effectiveness of the Fundamentals of Robotic Surgery (FRS) Skills Curriculum: A Single-blinded, Multispecialty, Multi-institutional Randomized Control Trial: Not Only Surgeon's Manual Skills...".” Ann Surg 274, no. 6 (December 1, 2021): e847–48. https://doi.org/10.1097/SLA.0000000000004658.
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    • Yu, Alice Yunzi L., Yoshiko Iwai, Samantha M. Thomas, Georgia M. Beasley, Ranjan Sudan, and Oluwadamilola M. Fayanju. “Trends in Racial, Ethnic, and Sex Representation Among Surgical Faculty Members and Medical Students in the US, 2011-2020.” Jama Surg 156, no. 12 (December 1, 2021): 1177–79. https://doi.org/10.1001/jamasurg.2021.4904.
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    • Juo, Yen-Yi, Chan Park, Jin Yoo, Daniel Guerron, Ranjan Sudan, Kelli Friedman, Dana Portenier, and Keri A. Seymour. “Technical Feasibility, Outcomes, and Patient Satisfaction After Needlescopic and Laparoscopic Bariatric Surgery: a Randomized Study.” Obes Surg 31, no. 11 (November 2021): 5085–91. https://doi.org/10.1007/s11695-021-05675-5.
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    • King, Keith, Ranjan Sudan, Sergio Bardaro, Ian Soriano, Anthony T. Petrick, Shaun C. Daly, Emanuele Lo Menzo, et al. “Assessment and management of gastroesophageal reflux disease following bariatric surgery.” Surg Obes Relat Dis 17, no. 11 (November 2021): 1919–25. https://doi.org/10.1016/j.soard.2021.07.023.
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    • Alexopoulos, Anastasia-Stefania, Matthew J. Crowley, Ying Wang, Cynthia A. Moylan, Cynthia D. Guy, Ricardo Henao, Dawn L. Piercy, et al. “Glycemic Control Predicts Severity of Hepatocyte Ballooning and Hepatic Fibrosis in Nonalcoholic Fatty Liver Disease.” Hepatology 74, no. 3 (September 2021): 1220–33. https://doi.org/10.1002/hep.31806.
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    • Seymour, Keri A., Megan C. Turner, Maragatha Kuchibhatla, and Ranjan Sudan. “Gastroesophageal Reflux Predicts Utilization of Dehydration Treatments After Bariatric Surgery.” Obes Surg 31, no. 2 (February 2021): 838–46. https://doi.org/10.1007/s11695-020-05043-9.
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    • Landin, MacKenzie, and Ranjan Sudan. “This Is How We Do It: Laparoscopic Roux-en-Y Gastric Bypass.” J Laparoendosc Adv Surg Tech A 30, no. 6 (June 2020): 619–22. https://doi.org/10.1089/lap.2020.0155.
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    • Leraas, Harold J., Morgan L. Cox, Kristen E. Rhodin, Kyle Freischlag, Brian F. Gilmore, Doreen Chang, Ranjan Sudan, John Haney, and John Migaly. “Medical Student Involvement and Learning Objectives in Morbidity and Mortality Conferences: A National Survey of the Association for Surgical Education's Committee of Clerkship Directors.” J Surg Educ 77, no. 1 (2020): 138–43. https://doi.org/10.1016/j.jsurg.2019.07.010.
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    • Leyva-Alvizo, Adolfo, Gabriela Arredondo-Saldaña, Valeria Leal-Isla-Flores, John Romanelli, Ranjan Sudan, Karen E. Gibbs, Anthony Petrick, Ian S. Soriano, and Ian S. ASMBS Foregut Committee. “Systematic review of management of gallbladder disease in patients undergoing minimally invasive bariatric surgery.” Surg Obes Relat Dis 16, no. 1 (January 2020): 158–64. https://doi.org/10.1016/j.soard.2019.10.016.
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    • Moris, Demetrios, Diamantis I. Tsilimigras, Babatunde Yerokun, Keri A. Seymour, Alfredo D. Guerron, Philip A. Fong, Eleftherios Spartalis, and Ranjan Sudan. “Foramen of Winslow Hernia: a Review of the Literature Highlighting the Role of Laparoscopy.” J Gastrointest Surg 23, no. 10 (October 2019): 2093–99. https://doi.org/10.1007/s11605-019-04353-3.
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    • Stefanidis, Dimitrios, Wendy C. King, Nancy Puzziferri, Annabelle R. Butler, Matthew Hutter, and Ranjan Sudan. “Development of ASMBS research agenda for bariatric surgery using the Delphi methodology.” Surg Obes Relat Dis 15, no. 9 (September 2019): 1563–69. https://doi.org/10.1016/j.soard.2019.06.043.
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    • Loomba, Rohit, Anjali Jain, Anna Mae Diehl, Cynthia D. Guy, Dana Portenier, Ranjan Sudan, Seema Singh, et al. “Validation of Serum Test for Advanced Liver Fibrosis in Patients With Nonalcoholic Steatohepatitis.” Clin Gastroenterol Hepatol 17, no. 9 (August 2019): 1867-1876.e3. https://doi.org/10.1016/j.cgh.2018.11.004.
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    • Davis, Matthew, Gerardo Davalos, Camila Ortega, Sugong Chen, Scott Schimpke, Kunoor Jain-Spangler, Jin Yoo, et al. “Magnetic Liver Retraction: an Incision-Less Approach for Less Invasive Bariatric Surgery.” Obes Surg 29, no. 3 (March 2019): 1068–73. https://doi.org/10.1007/s11695-018-03655-w.
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    • Sudan, Ranjan, Lindsey A. Olivere, Michael S. Nussbaum, and Gary L. Dunnington. “The business of educating the next generation of surgeons.” Am J Surg 217, no. 2 (February 2019): 205–8. https://doi.org/10.1016/j.amjsurg.2018.07.062.
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    • Satava, Richard M., Dimitrios Stefanidis, Jeffrey S. Levy, Roger Smith, John R. Martin, Sara Monfared, Lava R. Timsina, et al. “Proving the Effectiveness of the Fundamentals of Robotic Surgery (FRS) Skills Curriculum: A Single-blinded, Multispecialty, Multi-institutional Randomized Control Trial.” Ann Surg, January 31, 2019. https://doi.org/10.1097/SLA.0000000000003220.
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    • Cox, Morgan L., Donald A. Risucci, Brian F. Gilmore, Uttara P. Nag, Megan C. Turner, Shanna R. Sprinkle, John Migaly, and Ranjan Sudan. “Validation of the Omni: A Novel, Multimodality, and Longitudinal Surgical Skills Assessment.” J Surg Educ 75, no. 6 (November 2018): e218–28. https://doi.org/10.1016/j.jsurg.2018.10.012.
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    • Hawkins, Alexander T., Katherine Albutt, Paul E. Wise, Karim Alavi, Ranjan Sudan, Andreas M. Kaiser, Liliana Bordeianou, and Liliana Continuing Education Committee of the SSAT. “Abdominoperineal Resection for Rectal Cancer in the Twenty-First Century: Indications, Techniques, and Outcomes.” J Gastrointest Surg 22, no. 8 (August 2018): 1477–87. https://doi.org/10.1007/s11605-018-3750-9.
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    • Sudan, Ranjan, and Kunoor Jain-Spangler. “Tailoring Bariatric Surgery: Sleeve Gastrectomy, Roux-en-Y Gastric Bypass and Biliopancreatic Diversion with Duodenal Switch.” J Laparoendosc Adv Surg Tech A 28, no. 8 (August 2018): 956–61. https://doi.org/10.1089/lap.2018.0397.
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    • Freel, Stephanie A., Laura J. Fish, Benjamin Mirman, Ranjan Sudan, and Gayathri R. Devi. “Advancement of multidisciplinary education and research in translational sciences: MERITS program development at Duke University.” J Clin Transl Sci 2, no. 1 (February 2018): 57–62. https://doi.org/10.1017/cts.2018.17.
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    • Moris, Dimitrios, Alfredo D. Guerron, and Ranjan Sudan. “Long-term durability of outcomes after bariatric surgery: thinking outside the box.” Surg Obes Relat Dis 14, no. 2 (February 2018): 247. https://doi.org/10.1016/j.soard.2017.10.011.
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    • Leraas, Harold J., Morgan L. Cox, Victoria A. Bendersky, Shanna S. Sprinkle, Brian F. Gilmore, Rathnayaka M. Gunasingha, Elisabeth T. Tracy, and Ranjan Sudan. “Instituting a Surgical Skills Competition Increases Technical Performance of Surgical Clerkship Students Over Time.” J Surg Educ 75, no. 3 (2018): 644–49. https://doi.org/10.1016/j.jsurg.2017.09.007.
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    • Shrimal, Anurag, Ranjan Sudan, Gaurav Chaubal, Ahmad Zaaroura, Kitza Williams, and Kadiyala Ravindra. “Report of Mesocaval Shunt in the Management of Variceal Hemorrhage Following Gastric Bypass Surgery.” J Gastrointest Surg 21, no. 10 (October 2017): 1742–45. https://doi.org/10.1007/s11605-017-3450-x.
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    • Sudan, Ranjan, Matthew L. Maciejewski, Amber R. Wilk, Ninh T. Nguyen, Jaime Ponce, and John M. Morton. “Comparative effectiveness of primary bariatric operations in the United States.” Surg Obes Relat Dis 13, no. 5 (May 2017): 826–34. https://doi.org/10.1016/j.soard.2017.01.021.
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    • Maguire, Lillias Holmes, Karim Alavi, Ranjan Sudan, Paul E. Wise, Andreas M. Kaiser, and Liliana Bordeianou. “Surgical Considerations in the Treatment of Small Bowel Crohn's Disease.” J Gastrointest Surg 21, no. 2 (February 2017): 398–411. https://doi.org/10.1007/s11605-016-3330-9.
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    • Sudan, Reena, Ranjan Sudan, Elizabeth Lyden, and Jon S. Thompson. “Food cravings and food consumption after Roux-en-Y gastric bypass versus cholecystectomy.” Surg Obes Relat Dis 13, no. 2 (February 2017): 220–26. https://doi.org/10.1016/j.soard.2016.09.001.
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    • Guerron, Alfredo D., Hui-Jie Lee, Jin Yoo, Keri Seymour, Ranjan Sudan, Dana Portenier, and Chan Park. “Laparoscopic Single-Site Inguinal Hernia Repair Using a Self-Fixating Mesh.” Jsls 21, no. 1 (2017). https://doi.org/10.4293/JSLS.2016.00103.
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    • Ponce, Jaime, Eric J. DeMaria, Ninh T. Nguyen, Matthew Hutter, Ranjan Sudan, and John M. Morton. “American Society for Metabolic and Bariatric Surgery estimation of bariatric surgery procedures in 2015 and surgeon workforce in the United States.” Surg Obes Relat Dis 12, no. 9 (November 2016): 1637–39. https://doi.org/10.1016/j.soard.2016.08.488.
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    • Khandalavala, B. N., J. Geske, M. Nirmalaj, and R. Sudan. “Biliopancreatic diversion revisited: Health-related quality of life outcomes of biliary pancreatic with duodenal switch.” Bariatric Surgical Practice and Patient Care 11, no. 1 (March 1, 2016): 3–5. https://doi.org/10.1089/bari.2015.0049.
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    • Sudan, Ranjan, and Keri Seymour. “The Impaired Surgeon.” Surg Clin North Am 96, no. 1 (February 2016): 89–93. https://doi.org/10.1016/j.suc.2015.09.006.
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    • Alavi, Karim, Sook Chan, Paul Wise, Andreas M. Kaiser, Ranjan Sudan, and Liliana Bordeianou. “Fecal Incontinence: Etiology, Diagnosis, and Management.” J Gastrointest Surg 19, no. 10 (October 2015): 1910–21. https://doi.org/10.1007/s11605-015-2905-1.
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    • Kaiser, Andreas M., Rachel Hogen, Liliana Bordeianou, Karim Alavi, Paul E. Wise, Ranjan Sudan, and Ranjan CME Committee of the SSAT. “Clostridium Difficile Infection from a Surgical Perspective.” J Gastrointest Surg 19, no. 7 (July 2015): 1363–77. https://doi.org/10.1007/s11605-015-2785-4.
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    • Gardner, Aimee K., Ranjan Sudan, Ravi Sidhu, Barry D. Mann, and Daniel J. Scott. “The association for surgical education CESERT grant program: the first 15 years.” Am J Surg 209, no. 1 (January 2015): 115–19. https://doi.org/10.1016/j.amjsurg.2014.08.028.
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    • Phitayakorn, Roy, Michael W. Nick, Adnan Alseidi, David Scott Lind, Ranjan Sudan, Gerald Isenberg, Jeannette Capella, Mary A. Hopkins, and Emil R. Petrusa. “WISE-MD usage among millennial medical students.” Am J Surg 209, no. 1 (January 2015): 152–57. https://doi.org/10.1016/j.amjsurg.2014.10.004.
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    • Sudan, Ranjan, Philip Clark, and Brandon Henry. “Cost and logistics for implementing the American College of Surgeons objective structured clinical examination.” Am J Surg 209, no. 1 (January 2015): 140–44. https://doi.org/10.1016/j.amjsurg.2014.10.001.
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    • Ponce, Jaime, Ninh T. Nguyen, Matthew Hutter, Ranjan Sudan, and John M. Morton. “American Society for Metabolic and Bariatric Surgery estimation of bariatric surgery procedures in the United States, 2011-2014.” Surg Obes Relat Dis 11, no. 6 (2015): 1199–1200. https://doi.org/10.1016/j.soard.2015.08.496.
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    • Sudan, Ranjan, Ninh T. Nguyen, Matthew M. Hutter, Stacy A. Brethauer, Jaime Ponce, and John M. Morton. “Morbidity, mortality, and weight loss outcomes after reoperative bariatric surgery in the USA.” J Gastrointest Surg 19, no. 1 (January 2015): 171–78. https://doi.org/10.1007/s11605-014-2639-5.
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    • Sudan, Ranjan, and Erica Podolsky. “Totally robot-assisted biliary pancreatic diversion with duodenal switch: single dock technique and technical outcomes.” Surg Endosc 29, no. 1 (January 2015): 55–60. https://doi.org/10.1007/s00464-014-3653-0.
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    • Minter, Rebecca M., Gary L. Dunnington, Ranjan Sudan, Kyla P. Terhune, Daniel L. Dent, and Ashley K. Lentz. “Can this resident be saved? Identification and early intervention for struggling residents.” J Am Coll Surg 219, no. 5 (November 2014): 1088–95. https://doi.org/10.1016/j.jamcollsurg.2014.06.013.
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    • Dua, Anahita, Ranjan Sudan, and Sapan S. Desai. “Improvement in American Board of Surgery in-training examination performance with a multidisciplinary surgeon-directed integrated learning platform.” J Surg Educ 71, no. 5 (September 2014): 689–93. https://doi.org/10.1016/j.jsurg.2014.02.007.
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    • Bordeianou, Liliana, Lillias Holmes Maguire, Karim Alavi, Ranjan Sudan, Paul E. Wise, and Andreas M. Kaiser. “Sphincter-sparing surgery in patients with low-lying rectal cancer: techniques, oncologic outcomes, and functional results.” J Gastrointest Surg 18, no. 7 (July 2014): 1358–72. https://doi.org/10.1007/s11605-014-2528-y.
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    • Bordeianou, L., L. H. Maguire, K. Alavi, R. Sudan, P. E. Wise, and A. M. Kaiser. “Sphincter-Sparing Surgery in Patients with Low-Lying Rectal Cancer: Techniques, Oncologic Outcomes, and Functional Results.” Journal of Gastrointestinal Surgery 18, no. 7 (January 1, 2014): 1358–72. https://doi.org/10.1007/s11605-014-2528-y.
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    • Brethauer, Stacy A., Shanu Kothari, Ranjan Sudan, Brandon Williams, Wayne J. English, Matthew Brengman, Marina Kurian, et al. “Systematic review on reoperative bariatric surgery: American Society for Metabolic and Bariatric Surgery Revision Task Force.” Surg Obes Relat Dis 10, no. 5 (2014): 952–72. https://doi.org/10.1016/j.soard.2014.02.014.
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    • Sudan, Ranjan, Deborah Winegar, Steven Thomas, and John Morton. “Influence of ethnicity on the efficacy and utilization of bariatric surgery in the USA.” J Gastrointest Surg 18, no. 1 (January 2014): 130–36. https://doi.org/10.1007/s11605-013-2368-1.
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    • Jain-Spangler, Kunoor, Dana Portenier, Alfonso Torquati, and Ranjan Sudan. “Conversion of vertical banded gastroplasty to stand-alone sleeve gastrectomy or biliopancreatic diversion with duodenal switch.” J Gastrointest Surg 17, no. 4 (April 2013): 805–8. https://doi.org/10.1007/s11605-013-2165-x.
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    • Sanfey, Hilary, Debra A. Darosa, Gerald B. Hickson, Betsy Williams, Ranjan Sudan, Margaret L. Boehler, Mary E. Klingensmith, et al. “Pursuing professional accountability: an evidence-based approach to addressing residents with behavioral problems.” Arch Surg 147, no. 7 (July 2012): 642–47. https://doi.org/10.1001/archsurg.2012.832.
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    • Sudan, Ranjan, Kyla M. Bennett, Danny O. Jacobs, and Debra L. Sudan. “Multifactorial analysis of the learning curve for robot-assisted laparoscopic biliopancreatic diversion with duodenal switch.” Ann Surg 255, no. 5 (May 2012): 940–45. https://doi.org/10.1097/SLA.0b013e31824c1d06.
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    • Richardson, Brynn E., Eric A. Vanderwoude, Ranjan Sudan, Donald A. Leopold, and Jon S. Thompson. “Gastric bypass does not influence olfactory function in obese patients.” Obes Surg 22, no. 2 (February 2012): 283–86. https://doi.org/10.1007/s11695-011-0487-x.
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    • Lunsford, Keri Elizabeth, and Ranjan Sudan. “Small bowel perforation by a clinically unsuspected fish bone: laparoscopic treatment and review of literature.” J Gastrointest Surg 16, no. 1 (January 2012): 218–22. https://doi.org/10.1007/s11605-011-1610-y.
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    • Mor, Alessandro, Lindsey Sharp, Dana Portenier, Ranjan Sudan, and Alfonso Torquati. “Weight loss at first postoperative visit predicts long-term outcome of Roux-en-Y gastric bypass using Duke weight loss surgery chart.” Surg Obes Relat Dis 8, no. 5 (2012): 556–60. https://doi.org/10.1016/j.soard.2012.06.014.
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    • Sudan, R., and S. S. Desai. “Emergency and weekend robotic surgery are feasible.” Journal of Robotic Surgery 6, no. 3 (January 1, 2012): 263–66. https://doi.org/10.1007/s11701-011-0289-0.
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    • Sudan, Ranjan, and Danny O. Jacobs. “Biliopancreatic diversion with duodenal switch.” Surg Clin North Am 91, no. 6 (December 2011): 1281–ix. https://doi.org/10.1016/j.suc.2011.08.015.
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    • Sudan, Ranjan, Mary Salter, Thomas Lynch, and Danny O. Jacobs. “Bariatric surgery using a network and teleconferencing to serve remote patients in the Veterans Administration Health Care System: feasibility and results.” Am J Surg 202, no. 1 (July 2011): 71–76. https://doi.org/10.1016/j.amjsurg.2010.06.016.
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    • Kasotakis, George, Sumeet K. Mittal, and Ranjan Sudan. “Combined treatment of symptomatic massive paraesophageal hernia in the morbidly obese.” Jsls 15, no. 2 (2011): 188–92. https://doi.org/10.4293/108680811X13022985132164.
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    • Sudan, Ranjan, and Sapan Desai. “Conversion of laparoscopic adjustable gastric band to robot-assisted laparoscopic biliopancreatic diversion with duodenal switch.” Surg Obes Relat Dis 7, no. 4 (2011): 546–47. https://doi.org/10.1016/j.soard.2011.05.007.
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    • Sudan, Ranjan, George Kasotakis, Allison Betof, and Alene Wright. “Sleeve gastrectomy strictures: technique for robotic-assisted strictureplasty.” Surg Obes Relat Dis 6, no. 4 (2010): 434–36. https://doi.org/10.1016/j.soard.2010.05.009.
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    • Kasotakis, George, and Ranjan Sudan. “Retrograde intussusception after Roux-en-Y gastric bypass for morbid obesity.” Obes Surg 19, no. 3 (March 2009): 381–84. https://doi.org/10.1007/s11695-008-9775-5.
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    • Upadhyaya, Prashant K., Soujanya Chava, Syed Bin-Sangheer, Ranjan Sudan, Sumeet K. Mittal, and Samuel Cemaj. “Delayed rupture of a splenic artery pseudoaneurysm after biliopancreatic diversion.” Obes Surg 18, no. 7 (July 2008): 890–92. https://doi.org/10.1007/s11695-007-9411-9.
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    • Puri, Varun, Jyoti Ramachandran, and Ranjan Sudan. “Experience with the duodenal switch operation in the presence of intestinal malrotation.” Obes Surg 18, no. 5 (May 2008): 615–17. https://doi.org/10.1007/s11695-007-9326-5.
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    • Sudan, R., V. Puri, and D. Sudan. “Robotically assisted biliary pancreatic diversion with a duodenal switch: a new technique.” Surg Endosc 21, no. 5 (May 2007): 729–33. https://doi.org/10.1007/s00464-006-9171-y.
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    • Richardson, Brynn E., Eric A. Vander Woude, Ranjan Sudan, Jon S. Thompson, and Donald A. Leopold. “Altered olfactory acuity in the morbidly obese.” Obes Surg 14, no. 7 (August 2004): 967–69. https://doi.org/10.1381/0960892041719617.
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    • Yohannes, Paulos, A. Khan, Karl Francis, and Ranjan Sudan. “Robot-assisted Bricker ileoureteral anastomosis during intracorporeal laparoscopic ileal conduit urinary diversion for prostatocutaneous fistula: case report.” J Endourol 18, no. 3 (April 2004): 269–72. https://doi.org/10.1089/089277904773582886.
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    • Yohannes, Paulos, Malini Rao, Sathyaprasad Burjonrappa, and Ranjan Sudan. “Laparoscopic nephron-sparing surgery in a Jehovah's Witness patient.” J Endourol 18, no. 1 (February 2004): 59–62. https://doi.org/10.1089/089277904322836695.
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    • Yohannes, Paulos, Varun Puri, Bing Yi, A. K. Khan, and Ranjan Sudan. “Laparoscopy-assisted robotic radical cystoprostatectomy with ileal conduit urinary diversion for muscle-invasive bladder cancer: initial two cases.” J Endourol 17, no. 9 (November 2003): 729–32. https://doi.org/10.1089/089277903770802254.
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    • Sudan, D., R. Sudan, and R. Stratta. “Long-term outcome of simultaneous kidney-pancreas transplantation: analysis of 61 patients with more than 5 years follow-up.” Transplantation 69, no. 4 (February 27, 2000): 550–55. https://doi.org/10.1097/00007890-200002270-00015.
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    • Stratta, R. J., R. Sudan, and D. Sudan. “Long-term outcomes in simultaneous kidney-pancreas transplant recipients.” Transplant Proc 30, no. 4 (June 1998): 1564–65. https://doi.org/10.1016/s0041-1345(98)00359-5.
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    • Sudan, R., R. J. Stratta, and D. Sudan. “Long-term outcomes in simultaneous kidney-pancreas transplantation.” Transplant Proc 30, no. 2 (March 1998): 290. https://doi.org/10.1016/s0041-1345(97)01273-6.
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    • Sudan, R., S. Setterberg, A. Whitaker, and C. Kestenbaum. “An emerging schizophrenic syndrome.” J Am Acad Child Adolesc Psychiatry 32, no. 6 (November 1993): 1295–1301. https://doi.org/10.1097/00004583-199311000-00026.
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    • Clark, L. C., R. B. Spokane, R. E. Hoffmann, and R. Sudan. “The nature of fluorocarbon enhanced cerebral oxygen transport.” Adv Exp Med Biol 248 (1989): 341–55. https://doi.org/10.1007/978-1-4684-5643-1_38.
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    • Clark, L. C., L. K. Noyes, R. B. Spokane, R. Sudan, and M. L. Miller. “Long-term implantation of voltammetric oxidase/peroxide glucose sensors in the rat peritoneum.” Methods Enzymol 137 (1988): 68–89. https://doi.org/10.1016/0076-6879(88)37008-4.
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    • Clark, L. C., R. B. Spokane, M. M. Homan, R. Sudan, and M. Miller. “Long-term stability of electroenzymatic glucose sensors implanted in mice. An update.” Asaio Trans 34, no. 3 (1988): 259–65.
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    • Clark, L. C., R. B. Spokane, R. E. Hoffmann, R. Sudan, M. M. Homan, A. C. Maloney, S. J. Jacobs, T. L. Stroup, and P. E. Winston. “Polarographic cerebral oxygen availability, fluorocarbon blood levels and efficacy of oxygen transport by emulsions.” Biomater Artif Cells Artif Organs 16, no. 1–3 (1988): 375–93. https://doi.org/10.3109/10731198809132588.
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    • CLARK, L. C., L. K. NOYES, R. B. SPOKANE, R. SUDAN, and M. L. MILLER. “Design and Long‐Term Performance of Surgically Implanted Electroenzymatic Glucose Sensors.” Annals of the New York Academy of Sciences 501, no. 1 (January 1, 1987): 534–37. https://doi.org/10.1111/j.1749-6632.1987.tb45768.x.
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    • Clark, L. C., R. B. Spokane, R. Sudan, and T. L. Stroup. “Long-lived implanted silastic drum glucose sensors.” Asaio Trans 33, no. 3 (1987): 323–28.
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  • Book Sections

    • Sudan, R., and M. Landin. “Robot-assisted biliopancreatic diversion with duodenal switch.” In Robotic Surgery: Second Edition, 759–66, 2021. https://doi.org/10.1007/978-3-030-53594-0_61.
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    • Guerron, A. D., and R. Sudan. “Evaluation and treatment of the patient who is regaining weight.” In Foregut Surgery: Achalasia, Gastroesophageal Reflux Disease and Obesity, 295–307, 2019.
    • Olivere, L. A., and R. Sudan. “A taxonomy of errors: Adverse events and near miss analysis in bariatric surgery.” In Quality in Obesity Treatment, 283–93, 2019. https://doi.org/10.1007/978-3-030-25173-4_29.
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    • Sudan, R., K. J. Kallies, and S. N. Kothari. “Vertical banded gastroplasty: Evaluation and management of complications.” In Bariatric Surgery Complications and Emergencies, 223–28, 2016. https://doi.org/10.1007/978-3-319-27114-9_18.
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    • Sudan, R., and D. Stefanidis. “Revisional robotic bariatric surgery.” In Robotic Surgery for the General Surgeon, 89–96, 2014.
    • Sudan, R., and S. Lee. “Robotic biliopancreatic diversion: Robot-assisted (hybrid) biliopancreatic diversion with duodenal switch.” In Robotics in General Surgery, 133–41, 2014. https://doi.org/10.1007/978-1-4614-8739-5_12.
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  • Other Articles

    • Kaiser, Andreas M., Rachel Hogen, Liliana Bordeianou, Karim Alavi, Paul E. Wise, Ranjan Sudan, and Ranjan CME Committee of the SSAT. “Erratum to: Clostridium Difficile Infection from a Surgical Perspective.” J Gastrointest Surg, August 2015. https://doi.org/10.1007/s11605-015-2863-7.
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    • Bindal, Vivek, and Ranjan Sudan. “Has mini gastric bypass come of age?” Surg Obes Relat Dis, 2015. https://doi.org/10.1016/j.soard.2014.10.001.
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    • Sudan, Ranjan. “Is sleeve gastrectomy the magic bullet?” Surg Obes Relat Dis, 2014. https://doi.org/10.1016/j.soard.2014.05.003.
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    • Madon, S., S. Sahay, and R. Sudan. “E-Government policy and health information systems implementation in Andhra Pradesh, India: Need for articulation of linkages between the macro and the micro.” Information Society, October 1, 2007. https://doi.org/10.1080/01972240701572764.
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    • Sudan, D., R. Sudan, D. Schafer, and A. Langnas. “Without victory there is no survival: transarterial lipiodol chemoembolization and hepatocellular carcinoma.” Hepatology, July 1998. https://doi.org/10.1002/hep.510280137.
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  • Conference Papers

    • Sudan, R. “Association for surgical education: highlights and selected abstracts from the 2014 annual meeting.” In Teach Learn Med, 27:105–9, 2015. https://doi.org/10.1080/10401334.2014.979188.
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