Is there any change in pelvic floor electromyography during the first 6 months after radical retropubic prostatectomy? - Abstract

The aim of this study is to determine electromyographic pelvic floor muscles activity during the first 6 months post RRP and its relationship to urinary continence.

Thirty-eight men (mean age of 63.1 ± 5.7 year) with prostate cancer scheduled for open radical retropubic prostatectomy were evaluated.

EXCLUSION CRITERIA: Pelvic radiotherapy, systemic or neurologic diseases, pre-operative International Prostate Symptoms Score (IPSS) >7 and OABq ≥8. Surface electromyography (sEMG) evaluation, IPSS, Urinary Distress Inventory, Incontinence Impact Questionnaire, and Overactive Bladder Questionnaire-short form were applied before and at 1, 3, and 6 months after RRP. Six months after surgery, 18 men (47.4 %) presented urinary leakage. The sEMG evaluations within the first 6 months presented changes in fast contraction amplitude (p = 0.006), rest amplitude after fast contraction (p = 0.04), 10 s sustained contraction mean amplitude (p = 0.024) and final rest amplitude (p = 0.011). We observed that continent and incontinent patients as a group presented electromyographic changes during the first 6 months after radical prostatectomy that could be justified by the denervation/reinnervation of the external urethral sphincter. This finding is consistent with the adaptation of the pelvic floor musculature to the new urethral sphincter condition following surgery.

Written by:
Hacad CR, Glazer HI, Zambon JP, Burti JS, Almeida FG.   Are you the author?
Department of Urology - Female Urology and Voiding Dysfunction, Federal University of São Paulo - UNIFESP, São Paulo, Brazil.

Reference: Appl Psychophysiol Biofeedback. 2015 Mar;40(1):9-15.
doi: 10.1007/s10484-015-9271-3

PubMed Abstract
PMID: 25735504 Prostate Cancer Section