Force-length relationship in the pelvic floor muscles under transverse vaginal distension: a method study in healthy women

Neurourology and Urodynamics
M Verelst, G Leivseth

Abstract

The purpose of this study was to investigate whether there is a relationship between changes in the diameter of the urogenital hiatus and force developed in pelvic floor musculature. In addition, we wanted to examine the reliability of the method that measures force development in the pelvic floor in the transverse direction of the urogenital hiatus. Passive and total force in the pelvic floor was measured with an intra-vaginal device in 20 healthy parous volunteers. The measurements were done with a consecutively increasing diameter in the transverse plane of the urogenital hiatus. The procedure was repeated with a few days interval. The measurements show an increase in force with an increasing device-diameter. The results are reliable at all the diameters tested, estimated by the within-subject day-to-day variability which was non-significant. The 40 mm diameter device is most favourable, estimated by Bland Altman plots of the test-retest measurements. Force development in pelvic floor muscles increased as a function of vaginal diameter when measured in the frontal plane. The measurements were reliable at all the different diameters chosen.

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Citations

May 24, 2011·International Urogynecology Journal·Milena M WeinsteinRavinder K Mittal
Nov 11, 2009·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Mélanie MorinJean-François Pilon
Aug 16, 2012·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Cindy Auchincloss, Linda McLean
Jan 25, 2011·PM & R : the Journal of Injury, Function, and Rehabilitation·Fabiana Roberta NunesRinaldo Roberto Jesus Guirro
Mar 16, 2007·Neurourology and Urodynamics·J M MillerJ O L DeLancey
Nov 29, 2013·Neurourology and Urodynamics·Jennifer A KrugerAndrew J Taberner
Jan 1, 2021·Journal of Neurogastroenterology and Motility·Matthieu GraslandClaire Hentzen
Jan 8, 2021·Neurourology and Urodynamics·Catriona S CzyrnyjLinda McLean

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