Inclusion Criteria:  Men with acute urinary retention due to prostatic hyperplasia  Exclusion Criteria:  Patient's with serious conditions and incapacity Previous urethral or prostate surgery. Urethral stricture. Urethrorrhagia. Injuries of urethra and perineum. Attempts of bladder catheterization within 15 days before the acute urinary retention episode. Urinary tract infection. Neurogenic bladder. Chronic urinary retention with a bladder volume of more than 1 liter. Obstructive uropathy due to the acute urinary retention.