Permanent urinary diversion in two Vietnamese pot-bellied pigs by extrapelvic urethral or urethropreputial anastomosis.

Permanent urinary diversion was performed in a Vietnamese pot-bellied pig to bypass apparent urethral obstruction at the level of the urethral recess and in a second pig to correct bleeding from perineal urethrostomy. In the first pig, extrapelvic anastomosis of the penile portion of the urethra to the pelvic portion of the urethra was performed. In the second pig, the penis was amputated and the pelvic portion of the urethra was anastomosed to the preputial epithelium, creating a urethropreputial conduit. Postoperatively, positive-contrast radiography demonstrated continuity of the anastomoses, and both pigs were able to urinate normally. The pig with the urethropreputial anastomosis developed hematuria and nocturia that were controlled by continuous administration of antibiotics and resolved following cleansing of the preputial diverticulum 1 year after surgery. Extrapelvic urinary diversion should be considered for permanent resolution of urethral obstruction in Vietnamese pot-bellied pigs; urethral anastomosis is preferable to urethropreputial anastomosis, because of the greater risk of ascending urinary tract infection associated with urethropreputial anastomosis.