title: Acute urinary retention--a urodynamic assessment.
abstract: Thirty male patients with acute urinary retention were studied by standard urodynamic techniques on admission to hospital. Ten individuals also underwent cystography and sequential urodynamic testing over 96 h. Twenty-three per cent of patients did not require subsequent prostatectomy. Inability to initiate a voiding contraction during cystometry at the time of admission was associated with a prolonged duration of retention and a greater retained volume. The internal urethral meatus is closed in retention, and release of the retention results in an increase in profile length and maximum urethral closure pressure and a decrease in maximum urethral pressure. Free catheter drainage was associated with a reduction in bladder capacity and the appearance of detrusor instability.
mesh_terms: D000208:Acute Disease; D000368:Aged; D006801:Humans; D008297:Male; D008875:Middle Aged; D014521:Urethra / Q000503:physiopathology; D001743:Urinary Bladder / Q000503:physiopathology; D014555:Urination Disorders / Q000209:etiology / Q000503:physiopathology* / Q000628:therapy; D014563:Urodynamics