A. Hold the penis at a 30° to 45° angle when inserting the catheter. The penis should be held at a 90° angle to straighten the urethra and facilitate catheter insertion. B. Perform catheterization when you recognize the urge to void. Clients with BPH may not sense the urge due to urinary retention. Catheterization should be performed at scheduled intervals to prevent bladder overdistention. C. Use soap and water to wash the catheter after each use. Proper cleaning of the catheter with soap and water helps prevent infection and prolongs the catheter’s usability. D. Inflate the balloon when the urine flow stops. Self-catheterization uses a straight catheter, which does not have a balloon for inflation (balloons are used in indwelling catheters).