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1. Data Collection Project for Weight Loss Surgery (0502007736)

  • PI: Dr. Pomp
  • Investigators: Dr. Dakin, Dr. Strain, Dr. Hefazi, Ms. Ebel


  • All patients who receive weight loss surgery are asked for their permission to use their data on basic demographics, type of surgery and possible complications prior to and following surgery for comparative purposes
  • Nothing is required of the patient other than permission to use their information
  • The purpose of this study is to learn more about how weight loss occurs with surgery, possible complications of surgery and how the different surgeries compare

2. Enterra Therapy Gastric Stimulation System (0803009686)

  • PI: Dr. Dakin


  • The Enterra™ system is a device indicated for the treatment of patients with long term, uncontrolled (not helped by medication) nausea and vomiting from gastroparesis of diabetic or idiopathic origin
  • This is not an ongoing clinical trial study but requires IRB approval as the FDA gave the Enterra system an approval of a Humanitarian Device Exemption (HDE) of a Humanitarian Use Device (HUD)

3. Laparoscopic Gastric Bypass or Sleeve Gastrectomy for Type 2 Diabetes Mellitus: A Pilot Prospective Study in Overweight and Mildly Obese Subjects (Pending activation)

  • PI: Dr. Pomp
  • Support: WCMC and patient self pay
  • Investigators: Dr. Dakin, Dr. Strain, Dr. Sinha, Dr. Brillon, Ms. Ebel


  • In this pilot study, patients who are either overweight or mildly obese (i.e. with BMIs <35) who request Roux-en-Y Gastric Bypass as an assist to managing their diabetes are given surgery on a self-pay basis and followed for the resolution of their diabetes
  • This research study is being conducted to increase the understanding of and identify the mechanisms by which blood sugar elevations improve rapidly for some bariatric surgery patients, often before significant weight loss has occurred.

NIDDK LABS Center (DK 03-006)

  • PI: Dr. Paul Berk
  • LABS 2, Longitudinal Assessment of Bariatric Surgery (LABS 2 #0508008060)
  • PI (Weill Cornell): Dr. Alfons Pomp
  • Investigators: Drs.  Strain, Dakin, Hefazi Ms. Ebel and Ms Honohan


  • As a follow-up to the LABS 1 study previously completed which examined the 30 day mortality rate after bariatric procedures in 5000 patients, the LABS 2 study is a comprehensive longer term assessment of 2,400 patients. This protocol will assess the long-term effects of weight loss on health, gender issues, behavioral factors, work issues and leisure activities over 8 years.
  • For more information on the LABS Consortium and their ongoing research go

6. Body Composition and REE Responses to Bariatric Surgeries (NIH, DK 03-022 sub contract to Weill Cornell)

  • PI: Dympna Gallagher, Ed.D
  • PI: Dr. Strain, Weill Cornell (No Weill Cornell IRB approval required)
  • Investigators: Drs. Pomp, Dakin, Strain, Ms. Ebel


  • Consenting patients (52) will undergo multiple studies prior to and following bariatric procedures of body composition in order to examine the changes that occur. Measurement include total intracellular and extracellular body water, skeletal muscle mass, organ sizes, and bone mineral content using dilution techniques, MRI, and dual energy-X-ray absorptiometry
  • Screening only at Weill Cornell and referral to St. Lukes for consenting and studies. Dr. Strain, who was chairperson of the LABS BC work group, will liaison with the Body Composition Laboratory and be involved in patient follow-up, data analysis, and manuscript preparation.

7. Psychosocial Issues in Bariatric Surgery (0710009452)

  • PI: Dr. Strain
  • Investigators: Dr. Pomp, Dr. Dakin, Ms. Ebel


  • Patients will be asked to participate in telephone interviews conducted by Columbia University concerning psychosocial issues (LABS 3)
  • The purpose is to learn more about patients undergoing bariatric surgery and to follow them over time. Specifically, we are trying to find out what types of psychological and eating behavior characteristics will have an impact on the long-term results of bariatric surgery. With this information we may be able to learn what kinds of treatment are most helpful for patients
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New York-Presbyterian. The University Hospitals of Columbia and Cornell