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Updated: Jun 3, 2026
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Roux-en-Y Gastric Bypass Operation in Rats
Published on: June 11, 2012
Root cause analysis of internal hernia and Roux limb compression after laparoscopic Roux-en-Y gastric bypass using
Ahmed R Ahmed1, Danilo Miskovic, Thormela Vijayaseelan
1Department of Surgery and Cancer, Imperial College London, London, United Kingdom. ahmed.ahmed@imperial.nhs.uk
Summary
Surgical errors during laparoscopic Roux-en-Y gastric bypass can lead to internal hernia (IH) and Roux limb compression (RC). Missing stitches in the mesenteric window are a key predictor for IH, highlighting the need for systematic closure techniques.
Area of Science:
- Bariatric Surgery
- Surgical Complications
- Human Reliability Assessment
Background:
- Internal hernia (IH) and Roux limb compression (RC) are known complications of laparoscopic Roux-en-Y gastric bypass (LRYGB).
- Identifying surgical technical errors is crucial for preventing these adverse outcomes.
Purpose of the Study:
- To systematically identify surgical technical errors leading to IH and RC after retrocolic LRYGB.
- To evaluate the utility of human reliability assessment in analyzing surgical errors.
Main Methods:
- An observational clinical human reliability assessment approach was employed.
- Operating videos of 12 IH, 13 RC, and 21 control cases were analyzed by blinded investigators.
- Errors were categorized using the external error mode system.
Main Results:
- Complication groups had significantly more errors than controls (IH: 5.85, RC: 3.54, Control: 0.90).
- Missing intermesenteric stitches on both sides of the Roux limb were the most significant differentiating errors.
- A missed stitch between the Roux limb mesentery and transverse mesocolon independently predicted IH (B = 1.727, P = .025).
- No specific technical errors were identified for RC.
Conclusions:
- Human reliability assessment is effective for identifying operative failures in LRYGB.
- Systematic closure of the transverse mesenteric window may prevent internal hernia complications after retrocolic LRYGB.
