Related Experiment Video
Updated: May 21, 2026

Single-Anastomosis Duodeno-Ileal Bypass with Sleeve Gastrectomy Model in Mice
Published on: February 10, 2023
Tests of correlation between immediate postoperative gastroduodenal transit times and weight loss after laparoscopic
Manish Parikh1, Joseph Eisner, Nicole Hindman
1Department of Surgery, NYU School of Medicine, Bellevue Hospital Center, 550 First Avenue NBV 15 South 7, New York, NY 10016, USA. parikm01@med.nyu.edu
Background:
Previous studies have shown accelerated gastric emptying after sleeve gastrectomy. This study aimed to determine whether a correlation exists between immediate postoperative gastroduodenal transit time and weight loss after laparoscopic sleeve gastrectomy (LSG). Specifically, correlation tests were conducted to determine whether more rapid transit after LSG correlated with increased weight loss.
Methods:
Data were collected from an institutional review board-approved electronic registry. All LSGs were performed over a 40-Fr bougie, starting 5 to 7 cm proximal to the pylorus. Gastroduodenal transit time (antrum to duodenum) was calculated from a postoperative day 1 esophagram. Pearson's correlation coefficient was used for statistical analysis.
Results:
The analysis included 62 consecutive LSG patients. The mean gastroduodenal transit time was 12.3 ± 19.8 s. Almost all the patients (99%) had a transit time less than 60 s. The mean percentage of excess weight loss (%EWL) was 23.8 ± 9.8% at 3 months, 37.9 ± 11.8% at 6 months, and 52.2 ± 10.8% at 12 months. No correlation was found between gastroduodenal transit time and %EWL at 3, 6, or 12 months.
Conclusion:
No correlation was found between gastroduodenal transit time and weight loss after LSG.
Related Concept Videos
Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy
Sigmoidoscopy
Sigmoidoscopy is a diagnostic procedure that uses a flexible sigmoidoscope equipped with a light source and camera to examine the rectum and sigmoid colon. The procedure involves inserting the tube through the anus...
Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and solid...
Gastric Emptying
Endoscopic Procedures I: Esophagogastroduodenoscopy
During an EGD, the endoscope can be used to: