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Updated: Dec 8, 2025

Roux-en-Y Gastric Bypass Operation in Rats
Published on: June 11, 2012
Hyperammonemic Encephalopathy: A Complication of Gastric Bypass Surgery
Varun Reddy1, Jinal K Patel2, Dilendra Weerasinghe3
1Internal Medicine, Medical Center of Trinity, Trinity , USA.
Abstract:
Hyperammonemia is a metabolic abnormality characterized by elevated levels of ammonia in the blood. This case report illustrates a 72-year-old Caucasian female with a history of prior gastric bypass surgery done 15 years ago, who was admitted multiple times for acute encephalopathy over the course of a few months. The patient was found to have a gastro-gastric fistula seen on a CT scan of the abdomen, which was the culprit of her acute encephalopathy. The patient underwent fistula closure via esophagogastroduodenoscopy.
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