The Effect of Pelvic Floor Muscle Contraction on Detrusor Overactivity Pressure in Neurogenic and Nonneurogenic Women During Urodynamic Study: A Cross-Sectional Study

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ObjectiveThe aims of this study were to investigate whether detrusor overactivity can be influenced by a pelvic floor muscle contraction in multiple sclerosis–associated overactive bladder and idiopathic overactive bladder volunteers and to compare urodynamic findings between the two groups.DesignEighteen women with multiple sclerosis–associated overactive bladder and 17 women with overactive bladder responded the overactive bladder V8 questionnaire and performed urodynamic study with electromyography of pelvic floor muscle to confirm the presence of a 15-sec pelvic floor muscle contraction during a detrusor overactivity, when present. Variables were the following: overactive bladder-V8 questionnaire, maximum cystometric capacity, volume at first detrusor overactivity, maximum detrusor overactivity amplitude, and percentage of detrusor overactivity pressure reduction.ResultsAll participants had a reduction in detrusor overactivity pressure when pelvic floor muscle contraction was requested. Multiple sclerosis–associated overactive bladder group showed significant higher detrusor overactivity amplitude than overactive bladder group (P = 0.02). Overactive bladder group had their detrusor overactivity pressure reduced in a greater extent when compared with multiple sclerosis–associated overactive bladder group (P = 0.01).ConclusionsThe results suggest that pelvic floor muscle contraction is able to reduce detrusor overactivity pressure in multiple sclerosis–associated overactive bladder and overactive bladder population.

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