title: An explanation for the persistence of residual urine after external sphincterotomy.
abstract: After external urethral sphincterotomy 7 patients were found to have residual urine in excess of 80 ml. By measurement of the urethral pressure and analysis of the cystometrogram it was found that these patients fail to sustain bladder contraction and, thereby, fail to empty the bladder completely.
mesh_terms: D006801:Humans; D008297:Male; D009119:Muscle Contraction; D009132:Muscles / Q000601:surgery; D011183:Postoperative Complications; D011312:Pressure; D014521:Urethra / Q000503:physiopathology / Q000601:surgery*; D001743:Urinary Bladder / Q000503:physiopathology; D014554:Urination; D014555:Urination Disorders / Q000209:etiology*