Effects of the Y-U pyloroplasty on gastric emptying and duodenogastric reflux in the dog.

M. E. Stanton
R. M. Bright
R. Toal
Robert C. DeNovo Jr., University of Tennessee, Knoxville
M. McCracken
J. B. McLauren

Abstract

A Y-U pyloroplasty was performed on 5 healthy adult dogs. Gastric emptying half times of a canned food meal were measured by scintigraphy three times before surgery and three times from 6 to 8 weeks after surgery. Fluoroscopic studies of gastric and duodenal motility were made before surgery and 3, 7, and 35 days after surgery. The gastric emptying half time was decreased after surgery. By positive contrast fluoroscopy, the strength of antral contractions was seen to be decreased in three of the five dogs. On days 7 and 35, fluoroscopic findings were comparable to preoperative studies. Duodenogastric reflux was seen fluoroscopically in three dogs on four different occasions. This may reflect normal reflux patterns in the dog. No gastrointestinal problems were evident after surgery in four dogs. Reflux oesophagitis developed in one dog after surgery, which resolved with therapy. Studies of the Y-U pyloroplasty after 2 months indicated that it decreased gastric emptying time of solid food. Results of PM examination showed no abnormal gross or histopathological changes of oesophageal, gastric, or proximal duodenal tissues.