[The so-called resting pressure quotient--the urodynamic equivalent of clinical pelvic floor insufficiency].

The maximum urethral closure pressure ratio (UCPR) was checked in 370 patients by making recordings with 300 ml in the bladder in the sitting position and 100 ml in the supine position. The result was either an increase or a decrease in the UCPR in the 300 ml profile as compared to the 100 ml profile. The "resting pressure quotient" was judged to be positive in the former case and negative in the latter. The resting pressure quotient was found to be dependent on the subjective degree of incontinence: negative resting pressure quotients became more frequent as the degree of incontinence increased, and positive quotients decreased correspondingly. The probability was found to be more than 99.7% that there was a difference in frequency distribution between the group of 138 continent or minimally stress-incontinent patients and the 232 manifestly stress-incontinent women. The resting pressure quotient described here is the measured equivalent of the clinically diagnosed pelvic floor insufficiency. If the stress pressure profile is difficult to evaluate, this quotient can be taken into account in the urodynamic diagnosis. Negative closure pressure quotients suggest urethral incontinence.