Comparative study between Roux-en-Y gastric bypass and sleeve gastrectomy in dogs

Aims of study to compare between Roux-en-Y gastric bypass and gastric sleeve surgery to reduce excess weight in dogs with less complication. The study was conducted on 12 overweight male dogs. Their weights ranged between 33 and 39 kg, while their ages ranged from 20 months to 38 months. The dogs were randomly divided in two equal groups. The first group underwent gastric sleeve surgery, while the second group underwent gastric bypass surgery. The following criteria were used to evaluate the results: Animals weights were checked every two weeks for eight weeks. Laparoscopy was also performed two and eight weeks after surgery to evaluate any complications at the surgical operation site and ensure that stomach or intestinal contents were not leaking into the abdominal cavity. A blood sample was taken from each animal before surgery (zero time) and at the 2nd, 4th, 6th, and 8th weeks after surgery to measure iron and vitamin B12 levels. The weights of the animals in both groups decreased during 2nd, 4th, 6th, and 8th weeks, but the animals in the second group lost significant weight (p≤0.05) more than the animals in the first group. The results of the laparoscopic examination showed that there was no leakage of stomach and intestinal contents into the abdominal cavity; However, adhesions to the omentum, adjacent organs, or another part of the intestine are observed at the site of the operation. These adhesions were less in the first group than in the second group. According to the result of the iron test, the iron level in the second group decreased more than in the first groups. Vitamin B12 levels in the second group were lower than in the first group. In conclusion, the study showed that gastric bypass surgery effects on iron and vitamin B12 also severe adhesion and loss body weight more than gastric sleeve surgery.