The effect of pelvic floor muscle contraction on detrusor overactivity pressure in neurogenic and non-neurogenic women during urodynamic study: a cross-sectional study.

OBJECTIVE: The aim of this study was to investigate if detrusor overactivity (DO) can be influenced by a pelvic floor muscle (PFM) contraction in multiple sclerosis-associated overactive bladder (MS) and idiopathic overactive bladder (OAB) volunteers and compare urodynamic findings between the two groups.

DESIGN: Eighteen women with MS and seventeen women with OAB responded the OAB-V8 questionnaire and performed urodynamic study (UDS) with electromyography of PFM to confirm the presence of a 15-seconds PFM contraction during a DO, when present. Variables were: OAB-V8 questionnaire, maximum cystometric capacity, volume at first DO, maximum DO amplitude and percentage of DO pressure reduction.

RESULTS: All participants had a reduction in DO pressure when PFM contraction was requested. MS group showed significant higher DO amplitude than OAB group (p=0.02). OAB group had their DO pressure reduced in a greater extent when compared to MS group (p=0.01). ConclusionThe results suggest that PFM contraction is able to reduce DO pressure in MS and OAB population.