Reversed seromuscular gastrocystoplasty for bladder augmentation

The aim of this study was to prevent the complications of gastrocystoplasty by using reversed seromuscular gastrocystoplasty for bladder augmentation. Healthy mongrel dogs were used in the study. A diamond shaped segment was separated from the remainder of the stomach preserving the right gastroepip loic artery in 11 dogs. The gastric mucosa was removed. A reversed seromusc ular gastrocystoplasty was performed. The animals were observed for a mean of 7.7 months. Thereafter, relaparotomy was performed in all animals. A bla dder stone was found in 1 dog. In the histopathological evaluation of the u rinary bladder, it was seen that the gastric serosal surface was covered wi th the urothelium in all dogs. Transitional epithelial hyperplasia in 1 dog (12.5%) and squamous metaplasia in 2 dogs (25%) were identified. There wer e no statistical differences between preoperative and postoperative values of urine and blood pH and serum sodium, potassium, chloride, and bicarbonat e levels. Complications of gastrocystoplasty such as hypochloremic metaboli c alkalosis and hematuria and dysuria syndrome, are prevented by this proce dure. The shrinkage of the gastric patch surface may also be prevented by f acing the smooth gastric serosa to the internal surface of the urinary blad der.