Figure 4.

(a) In voiding urohydropropulsion, the urinary bladder is distended with sterile fluid. (b) The cat is held in a vertical position after the urinary bladder is distended. (c) The transurethral catheter is removed and the urinary bladder is gently agitated by grasping it through the abdominal wall. (d) The urinary bladder is gently compressed inducing micturition and voiding of the urocystoliths into the cup (arrowheads). (e) Most cats experience hematuria after voiding urohydropropulsion