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Updated: Jul 12, 2026

Roux-en-Y Gastric Bypass Operation in Rats

Roux-en-Y Gastric Bypass Operation in Rats

Published on: June 11, 2012

Adding malabsorption for weight loss failure after gastric bypass.

Robert E Brolin¹, Ronald P Cody

¹Department of Surgery, University of Pittsburgh Medical School, Pittsburgh, PA, USA. rbrolin@njbariatricspc.com

Surgical Endoscopy

|September 5, 2007

Summary

This study presents a revisional Roux-en-Y (RY) gastric bypass technique for patients with inadequate weight loss. The distal modification achieved satisfactory weight loss in nearly half of the patients studied.

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Area of Science:

Bariatric Surgery
Gastroenterology
Surgical Techniques

Background:

Revisional Roux-en-Y (RY) gastric bypass is indicated for patients with unsatisfactory weight loss after primary bariatric surgery.
Previous bariatric operations may include pure restrictive procedures or primary gastric bypass.
Assessing the efficacy of revisional RY gastric bypass is crucial for improving patient outcomes.

Observation:

A distal modification technique for RY gastric bypass was performed on 54 patients.
The technique involved lengthening the Roux limb to create a 75-100 cm common channel below the enteroenterostomy.
The gastrojejunostomy was concomitantly revised during the procedure.

Findings:

Of the 54 patients, 47 had undergone primary gastric bypass and 7 had failed pure restrictive operations.
The mean excess weight loss was 47.9% in patients followed for one year or longer.
This revisional approach yielded satisfactory weight loss in approximately 50% of the patient cohort.

Implications:

The described distal modification of RY gastric bypass offers a viable option for patients with suboptimal weight loss post-bariatric surgery.
This technique may improve weight management outcomes in a significant portion of patients who did not achieve desired results from initial bariatric procedures.
Further research could explore long-term efficacy and patient selection criteria for this revisional strategy.