Sleeve Gastrectomy with Pyloroplasty in Wistar Rats: Assessment of Gastric Emptying, Intestinal Transit, and Possible Duodenogastric Alkaline Reflux.

Abstract

BACKGROUND:

Studies indicate sleeve gastrectomy (SG) as a factor of aggravation or even emergence of symptoms of gastroesophageal reflux disease. Accelerated gastric emptying is described as a mitigating factor. SG may be potentiated by adding a pyloroplasty, although with the potential risk of resulting in duodenogastric alkaline reflux. The objective was to standardize sleeve gastrectomy with pyloroplasty in rats, analyze the complementation in terms of mortality and weight evolution, and conduct assessments on gastric emptying, intestinal transit, and genesis of possible duodenogastric reflux.

METHODS:

Ninety-three male Wistar rats were divided into a pilot study (standardization of the surgical technique and the scintigraphic study), and the main study. They were then subdivided into the SHAM group, the sleeve gastrectomy (SG) group, and the sleeve gastrectomy with pyloroplasty (SGP) group. After 3 months, the animals were submitted to two scintigraphic experiments and histological analysis of gastric biopsies.

RESULTS:

The surgical groups (SG and SGP) lost initially more weight than the SHAM group, and the gastric emptying and intestinal transit in the first were more accelerated. However, no difference was found between the SG and SGP groups. Scintigraphic and histological analyses did not reveal statistical differences among the SG and SGP groups regarding gastroesophageal and duodenogastric refluxes.

CONCLUSIONS:

Pyloroplasty did not affect weight reduction or increase duodenogastric reflux, after three postoperative months in this animal model of sleeve gastrectomy.

• Authors: Marcio Gimenez, Lauro Wichert-Ana, Mariângela O Brunaldi, Leonardo Alexandre-Santos, Carla B Nonino, Ana Carolina Trevisan, Wilson Salgado Jr
• Journal: Obesity surgery (Obes Surg) Vol. 32 Issue 8 Pg. 2611-2617 (08 2022) ISSN: 1708-0428 [Electronic] United States
• PMID: 35715612 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: © 2022. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

Topics

• Animals
• Duodenogastric Reflux (surgery)
• Gastrectomy (methods)
• Gastric Emptying
• Male
• Obesity, Morbid (surgery)
• Pilot Projects
• Rats
• Rats, Wistar