Related Experiment Video
Updated: Jul 31, 2026
Roux-en-Y Gastric Bypass Operation in Rats
Published on: June 11, 2012
Marginal ulcer after gastric bypass: a prospective 3-year study of 173 patients
J A Sapala1, M H Wood, M A Sapala
1Surgical Services, Detroit Riverview Hospital, MI, USA.
Background:
Marginal ulceration (MU) after Roux-en-Y gastric bypass (RYGB) is a well-recognized complication. Its incidence varies between 1% and 16%. Factors associated with the development of MU include pouch size, pouch orientation, staple line integrity, and mucosal ischemia. Nonsteroidal anti-inflammatory drugs (NSAIDs) and Helicobacter pylori may also contribute to MU, but their mechanism of action in the RYGB patient has not been studied.
Methods:
In 1994 a prospective 3-year study was designed to document the incidence of MU after near-total gastric bypass (NTGB). In this procedure the transected pouch was limited to the cardia, and the gastrojejunostomy was made along the greater curvature. A total of 173 patients entered the study. All patients who experienced postoperative nausea, vomiting, or abdominal pain underwent endoscopic examination of the pouch, stoma, and proximal Roux-en-Y limb. Gastrograffin studies were used within the first 2 weeks of operation.
Results:
One year after operation, MU was not identified in any patient. At 3 years follow-up, MU was documented in one patient (0.6%) with a dilated gastric reservoir (60 cc).
Conclusion:
This study reviews the etiology, diagnosis, and treatment of MU in the RYGB patient and offers specific recommendations to reduce its occurrence. It also confirms a preliminary impression that NTGB is an effective operation in preventing MU formation.
Insights
Near-total gastric bypass (NTGB) significantly reduces marginal ulceration (MU) risk after Roux-en-Y gastric bypass (RYGB). This study found only a 0.6% incidence of MU after 3 years, suggesting NTGB is effective in preventing this complication.
Area of Science:
- Bariatric Surgery
- Gastrointestinal Surgery
- Surgical Complications
Background:
- Marginal ulceration (MU) is a known complication following Roux-en-Y gastric bypass (RYGB), with incidence rates ranging from 1% to 16%.
- Factors contributing to MU include pouch size, orientation, staple line integrity, and mucosal ischemia.
- The roles of NSAIDs and Helicobacter pylori in MU development post-RYGB require further investigation.
Purpose of the Study:
- To document the incidence of marginal ulceration (MU) after near-total gastric bypass (NTGB).
- To evaluate the efficacy of NTGB in preventing MU formation.
- To review the etiology, diagnosis, and treatment of MU in RYGB patients.
Main Methods:
- A prospective 3-year study involving 173 patients undergoing near-total gastric bypass (NTGB).
- NTGB procedure involved a limited cardia pouch and a greater curvature gastrojejunostomy.
- Postoperative monitoring included endoscopic examination and Gastrograffin studies for symptomatic patients.
Main Results:
- No cases of marginal ulceration (MU) were identified at the 1-year follow-up.
- After 3 years, only one patient (0.6%) developed MU, associated with a dilated gastric reservoir (60 cc).
Conclusions:
- Near-total gastric bypass (NTGB) appears to be highly effective in preventing marginal ulceration (MU) formation.
- The study supports NTGB as a beneficial modification for reducing MU risk in RYGB patients.
- Recommendations for reducing MU occurrence in RYGB patients are provided.
