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Department of Surgery
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 Obesity

Columbia University Center for Metabolic and Weight Loss Surgery
Surgical Procedures & Innovations  Obesity Surgery Revisions


New Incisionless Procedure to treat Weight Regain after Gastric Bypass Surgery

The study is currently on hold.

EndoSurgical Operating System

The TransPort™ instrument is used to perform the EROS Procedure (Endolumenal Revision of Obesity Surgery). This instrument has four working channels, through which the physician can pass surgical and visualization instruments. The device is advanced through the mouth and into the GI tract in a flexible state, and then locked into a configuration conforming to the patient's anatomy. The physician then navigates the long slender "scope" portion to visualize anatomical structures and deliver therapy with efficiency and precision.

The Columbia University Center for Metabolic and Weight Loss Surgery is conducting a study to investigate a new, less invasive surgical option to treat weight regain in post-gastric bypass patients. If you were originally successful with your bypass surgery but now find yourself regaining some of your lost weight, you may be a candidate for the EROS (Endolumenal Revision of Obesity Surgery) procedure.

Weight regained after gastric bypass surgery may be caused by an enlarged pouch and/or stretching of the stoma, the opening between the stomach pouch and small intestine. The EROS Procedure is a new surgical option to treat weight regain in post-gastric bypass patients. The procedure uses FDA-cleared endoscopic instruments to decrease pouch and stoma size and recreate a restriction to encourage weight loss. It does not require surgical incisions. In the procedure, an endoscopic suturing device is introduced through the mouth. Sutures are placed in the stomach pouch and stoma to reduce their size which slows the exit of food from the stomach pouch, enabling patients to better restrict food intake and reverse their weight re-gain. The EROS procedure is expected to provide important advantages over surgery, including, minimal post-operative pain, fast recovery time, and no scarring.


To participate in the study, you should have a BMI of 40 or above if you donít have any existing health problems (such as high blood pressure, diabetes, or sleep apnea). You should have a BMI of 35-40 if you do have any of these health problems.

If you would like to find out more about the study, please contact our offices at 212.305.4000.






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