ACQUIRED URETEROVAGINAL FISTULA SECONDARY TO OVARIOHYSTERECTOMY IN A DOG: DIAGNOSIS USING ULTRASOUND-GUIDED NEPHROPYELOCENTESIS AND ANTEGRADE URETEROGRAPHY

A one year old Jack Russel terrier became urinary incontinent one week after elective ovariohysterectomy. Intravenous urography and cystourethrography showed right hydronephrosis but failed to demonstrate the cause of incontinence. Nephropyelocentesis under ultrasound guidance produced exudate and subsequent antegrade ureterography demonstrated a ureterovaginal fistula. Exploratory laparotomy confirmed this diagnosis and indicated that the ureter had been included in a ligature around the vaginal stump. This is an uncommon complication of ovariohysterectomy.