[Preoperative determination of bladder contractility in patients with stress incontinence (author's transl)].

Postoperative retention of urine following surgical treatment of female stress incontinence can be avoided by preoperative determination of the detrusor contractility by sudden interruption of the urinary flow during micturition. During voiding, the intravesical pressure can be (1) normal, (2) low or even zero, when the voiding occurs by an increase of the intra-abdominal pressure or by decreasing the ureteral resistance. Because of the bladder output relation, a normal detursor contraction can be seen during the "Stop-test", despite a minimal intravesical pressure during micturition. In patients with ineffective detrusor contraction, operative correction includes the risk of postoperative residual urine.