The uroflowmeter.
D006801:Humans; D008297:Male; D011470:Prostatic Hyperplasia / Q000503:physiopathology; D011471:Prostatic Neoplasms / Q000503:physiopathology; D014521:Urethra / Q000503:physiopathology*; D014525:Urethral Stricture / Q000503:physiopathology; D001743:Urinary Bladder / Q000503:physiopathology*; D014555:Urination Disorders / Q000175:diagnosis*