[Pelvic floor muscle contraction and maximum urethral closure pressure]. / Contraction des muscles du plancher pelvien et pression de clôture urétrale maximale.

ABSTRACT

OBJECTIVES: The aim of this study was to precise the relationship between the pelvic floor muscle (PFM) contraction and the maximum urethral closure pressure (MUCP) at rest and during a containing effort. MATERIALS Longitudinal study, observational, single-center retrospective performed in successively 358 women addressed for urodynamics. MUCP at rest and during a containing effort, gain of MUCP, functional urethral length (FUL), scores USP and ICQ-SF, cervico-urethral mobility (CUM) according to POP-Q classification and leak point pressure were analyzed according to the PFM contraction. RESULTS: One hundred and seventy-three had genuine stress urinary incontinence, 25 urge urinary incontinence, 148 mixed incontinence and 12 had no urinary incontinence. PFM contraction was not associated with a hysterectomy, age, parity, BMI, CUM, FUL, MUCP at rest, the severity of the incontinence assessed by ICIQ-SF score and leak point pressure. There was a proportional relationship between PFM contraction and the value of MUCP measured during this contraction (P<0.0001) on the one hand, and the gain of MUCP (P<0.0001) on the other. MUCP at rest was independent from the MUCP during the containing effort and the gain of MUCP. CONCLUSIONS: The strength of contraction of the PFM is not correlated with MUCP at rest but proportional to the augmentation of the MUCP during the containing effort.