A method for recording urine outflow from the ureter in conscious dogs.

Ureterostomy: Under intravenous pentobarbitone (30mg/~g) anaesthesia the ureter is approached retroperitoneally through a paravertebral incision extending from the costovertebral angle to the iliac crest. The muscles of the abdominal wall are cut along the line of incision. The ureter is identified in the retroperitoneal tissue and is drawn out without disturbing its blood supply. A longitudinal incision of about J Cm is made into the lumen at the middle of the exposed ureter. This slit in the ureter is approximated subcutaneously to a stab wound of the same sizemade in the skin about 2 cm lateral to the main incision and a cutaneous ureterostomy is done by stitching the margins of the exposed mucous membrane of the ureter to the skin margins of the stab wound. Care is taken that there is no stretch or twist of the ureter and that its blood supply is least disturbed. The muscle layers are then closed with interrupted stitches leaving adequate gap for the ureter to pass to and from the ureterostomy site. The main skin incision is then closed.