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[The correlation of the severity of stress urinary incontinence with static and stress urethral pressure profiles].

The urethral pressure profile (UPP) at rest and under stress was recorded by means of double lumen microtip transducer catheter in 58 females with stress urinary incontinence (SUI). The patients were divided into three groups including mild to moderate SUI patients (n = 29, group 1), severe SUI patients (n = 16, group 2) and very severe SUI patients (n = 13, group 3) according to a one-hour pad test. The functional urethral length (FUL) was divided into four equal lengths and the pressure transmission ratio (PTR) was calculated for each quartile for each female. We examined the correlation of the severity of SUI with urethral pressure parameters: maximum urethral closure pressure (MUCP) at rest and functional urethral length (FUL) at rest and PTR. SUI patients showed a negative association between the severity of SUI and MUCP, but no significant differences in the FUL were seen between the different groups. PTR was shown to be similar in order for all groups of SUI patients showing a linear decrease in the value of the PTR along the FUL. However, we found a negative association between the severity of SUI and PTR (P < 0.05) at the middle part of the FUL (Q3). These findings indicate that there are more defective distal sphincter mechanisms in severe SUI patients than in mild to moderate SUI patients. There was an overlap between the different groups in both MUCP and PTR at the middle urethra (Q3), suggesting that other parameters are related with the severity of SUI.