Sivamainthan (Siva) Vithiananthan, MD, FACS, FASMBS, FICS
Professor of Surgery, Clinician Educator, Warren Alpert Medical School at Brown University
Adjunct Clinical Assistant Professor, Bryant University Physician Assistant Program
Chief of Bariatric and Minimally Invasive Surgery, The Miriam Hospital
Medical Director of the Center for Bariatric Surgery, The Miriam Hospital
Accepting New Patients
Siva Vithiananthan, MD serves as Chief of Minimally Invasive and Bariatric Surgery at the Center for Bariatric Surgery, leads the surgical team. Dr. Vithiananthan specializes in laparoscopic surgical procedures, both bariatric and non-bariatric, and has many years of experience in bariatric surgery. He is also an Associate Professor of Surgery (clinical) at The Warren Alpert Medical School of Brown University. His main research focus is on advanced surgical techniques and the metabolic and physiological effects of weight loss surgery.
Dr. Vithiananthan received his medical degree from Columbia University College of Physicians and Surgeons in New York, New York. He completed his residency at Baystate Medical Center in Springfield, Massachusetts, and fellowships at New York Presbyterian Hospital in New York, New York, and the University of Connecticut School of Medicine/Hartford Hospital in Hartford, Connecticut.
Board Certification: American Board of Surgery (General Surgery, Surgical Critical Care)
Medical School: Columbia University Vagelos College of Physicians and Surgeons, New York, NY
Residency: General Surgery - Baystate Medical Center, Springfield, MA, and Tufts University School of Medicine, Boston, MA
Surgical Critical Care - University of Connecticut, Hartford Hospital, Hartford CT
Advanced Laparoscopic Surgery - NewYork-Presbyterian/Columbia University Irving Medical Center, New York City, NY
Memberships in Societies:
Fellow - American College of Surgeons (FACS)
Fellow - American Society for Metabolic and Bariatric Surgery (FASMBS)
Fellow - International College of Surgeons (FICS) - U.S. Section
Society of American Gastrointestinal and Endoscopic Surgeons
International Federation for the Surgery of Obesity and Metabolic Disorders
Association for Academic Surgery
International College of Surgeons
New England Surgical Society
Hospital Affiliations: The Miriam Hospital
- Mort T, Vithiananthan S., Extubation of the Difficult Airway over an Airway Exchange Catheter: Relationship between Catheter Size and Patient Tolerance. Critical Care Medicine, 27.1, A 57:1999
- Vithiananthan S, Evasovich M, Keating K., Esophageal Doppler Monitor Correcting Pulmonary Artery Catheter Hemodynamic Data in The Presence of Tricuspid Regurgitation. Chest, 4 (suppl 2), 421s – 422s, 1999
- Vithiananthan S, Cooper Z, Betten K, Stapleton GS, Carter J, Huang EH, Whelan RL. Hybrid laparoscopic flexure takedown and open procedure for rectal resection is associated with significantly shorter length of stay than equivalent open resection. Diseases of the Colon and Rectum. 2001 Jul;44(7):927-35.
- Bond DS, Raynor HA, Vithiananthan S, Sax HC, Pohl D, Roye GD, Ryder BA, Wing RR. Differences in salivary habituation to repeated presentations of a taste stimulus in bariatric surgery candidates and normal-weight controls. Obesity Surgery. 2009 Jul;19(7):873-8. [Epub 2009 May 20].
- Bond DS, Vithiananthan S, Leahey TM, Thomas JG, Sax HC, Pohl D, Ryder BA, Roye GD, Giovanni J, Wing RR. Prevalence and degree of sexual dysfunction in a sample of women seeking bariatric surgery. Surgery for Obesity and Related Diseases. 2009 Nov-Dec;5(6):698-704. [Epub 2009 Jul 24].
- Bond DS, Jakicic JM, Vithiananthan S, Thomas JG, Leahey TM, Sax HC, Pohl D, Roye GD, Ryder BA, Wing RR. Objective quantification of physical activity in bariatric surgery candidates and normal-weight controls. Surgery for Obesity and Related Diseases. 2010 Jan-Feb;6(1):72-8. [Epub 2009 Sep 10].
- Bond DS, Jakicic JM, Unick JL, Vithiananthan S, Pohl D, Roye GD, Ryder BA, Sax HC, Wing RR. Pre- to Postoperative Physical Activity Changes in Bariatric Surgery Patients: Self Report vs. Objective Measures. Obesity 2010;18: 2395-2397
- Bond DS, Wing RR, Vithiananthan S, Sax HC, Roye GD, Ryder BA, Pohl D, Giovanni. Significant resolution of female sexual dysfunction after bariatric surgery. Surgery for Obesity and Related Diseases 2011; 1: 1-7 Jan-Feb
- Thomas JG, Bond DS, Ryder BA, Leahey TM, Vithiananthan S, Roye GD, Wing RR: Ecological momentary assessment of recommended postoperative eating and activity behaviors. Surgery for Obesity and Related Diseases 2011; 7:206-12
- Dale S. Bond, PhD, Sivamainthan Vithiananthan, MD, Justin M. Nash, PhD, J. Graham Thomas, PhD, Rena R. Wing, PhD. Improvement of Migraine Headaches in Severely Obese Patients after Bariatric Surgery. Neurology 76:1135-1138, 2011
- Bond DS, Unick JL, Jakicic JM, Vithiananthan S, Pohl D, Roye GD, Ryder BA, Sax HC, Giovanni J, Wing RR. Objective Assessment of Time Spent Being Sedentary in Bariatric Surgery Candidates. Obesity Surgery 2011; 21: 811-814
- Unick JL, Bond DS, Jakicic JM, Vithiananthan S, Ryder BA, Roye GD, Pohl D, Sax HC, Wing RR. Comparison of two objective monitors for assessing physical activity and sedentary behavior in bariatric surgery patients. Obesity Surgery 22:347-35, 2012
- Leahey TM, Bond DS, Raynor HA, Roye GD, Vithiananthan S, Ryder BA, Sax HC, Wing RR. Effects of bariatric surgery on food cravings: do food cravings and the consumption of craved foods “normalize” after bariatric surgery? Surgery for Obesity and Related Diseases 8 (1):84-91, February 2012
- Bond DS, Unick JS, Jakicic JM, Vithiananthan S, Trautvetter S, O’Leary K, Wing R: Physical Activity and Quality of Life in Severely Obese Individuals Seeking Bariatric Surgery.
Health and Quality of Life Outcomes, 10:86, 2012
- Vithiananthan S, Gero D, Zhang JY, Machan JT: “A Case-Controlled Matched-Pair Cohort Study of Single Incision and Conventional Laparoscopic Gastric Band Patients in a Single US Center with 1-year Follow-up” Surgical Endoscopy, July 26, 2012
- Bond DS, Thomas JG, Unick JL, Raynor HA, Vithiananthan S, Wing RR: Self-reported and objectively measured sedentary behaviors in bariatric surgery candidates. Surgery for Obesity and Related Diseases 9(1):123-8, 2013 Jan.
- Tong I, Bourjeily G, Casas R, Vithiananthan S: Contraception Use in Women Undergoing Bariatric Surgery. Obesity Research & Clinical Practice, 8(6):e608-13, 2014 Nov-Dec http://dx.doi.org/10.1016/j.orcp.2014.08.006
- Bond DS; Vithiananthan S, Thomas JG, Trauvetter J, Unick JL, Jakicic JM; Pohl D, Ryder BA; Roye GD, Sax HC, Wing RR: Bari-Active: A randomized controlled trial of a preoperative intervention to increase physical activity in bariatric surgery patients. Surgery for Obesity and Related Disease 11 (1): 169-77, Jan-Feb 2015
- Bond DS, Thomas JG, King WC; Vithiananthan S; Webster JR, Ryder B, Pohl D, Roye GD, Sax H, Wing R: Exercise improves quality of life in bariatric surgery candidates: Results from the Bari-Active randomized controlled trial. Obesity 23 (3): 536-42, March 2015
- Bond DS, Thomas JG, Vithiananthan S, Webster J; Unick JL, Ryder BA, Pohl D: Changes in Enjoyment, Self-Efficacy and Motivation during a Randomized Trial to Promote Habitual Physical Activity Adoption in Bariatric Surgery Patients, Surgery for Obesity & Related Diseases. 12(5):1072-9, 2016 Jun.
- Bond DS, Thomas JG, Vithiananthan S, Raynor H, Webster J; Unick JL: “Greater Adherence to Recommended Morning Physical Activity is Associated with Greater Total Intervention-Related Physical Activity Changes in Bariatric Surgery Patients” Journal of Physical Activity and Health, Accepted February 2017, http://journals.humankinetics.com/doi/pdf/10.1123/jpah.2016-0529
- Bond DS, Thomas JG, Vithiananthan S, Unick J, Webster J. Roye GD, Ryder BA, Sax HC: Intervention-related increases in preoperative physical activities are maintained 6-months after bariatric surgery: Results from the bari-active trial. International Journal of Obesity 41 (3): 467-470, March 2017
- M. Giorgi, B. Ryder, D. Roye, T. Stafford, T. Chong, J. Malek, S. Sangisetty, S. Vithiananthan: “Safety of Retrievable Inferior Vena Cava Filter Placements in High-Risk Bariatric Surgery Patients,” Bariatric Surgical Practice and Patient Care, 13 (1), January 2018
- Goldstein SP, Thomas G, Vithiananthan, S, Blackburn JA, Jones DB, Webster J, Jones R, Evans EW, Dushay J, Moon J, Bond DS: Study Protocol of Multi-sensor Ecological Momentary Assessment of Behavioral and Psychosocial Predictors of Weight Loss Following Bariatric Surgery: A Multicenter Prospective Longitudinal Evaluation, BMC Obesity, Nov 5, 5:27 2018, PMCID:PMC6217766
- Bueter M, Gero D. Giorgi M, Vithiananthan S: Defining Global Benchmarks in Bariatric Surgery: A Multicenter Analysis of Minimally Invasive Roux-en-Y Gastric Bypass and Sleeve Gastrectomy Annals of Surgery, Submitted January 2019