Pressure measurements during pelvic floor muscle contractions: The effect of different positions of the vaginal measuring device

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Abstract
The purpose of the present investigation was to assess whether different positions of the vaginal measuring device affect the pressure readings during pelvic floor muscle (PFM) contraction.Twelve women with stress urinary incontinence (SUI) participating in a PFM exercise program, volunteered for the study. The diagnosis of SUI was based on urodynamic investigation and pad test. The mean age of the women was 40.9 years (24–50).The women performed three PFM contractions with a vaginal balloon placed in four different positions: 1) against the vaginal vault and in the posterior fornix, 2) in the proximal upper third of the vagina, 3) with the middle of the balloon 3.5 cm from the introitus vagina and 4) with half of the balloon outside the introitus vagina.The results demonstrated significant differences between recordings from the four vaginal positions: position 1, median pressure 5 cm H2O; position 2, 9 cm H2O; position 3, 15 cm H2O; and position 4, 8 cm H2O.It is concluded that the position of the vaginal device affects the results. This may be one important factor which could explain the variability of vaginal pressure recordings during PFM contractions. For most women the highest pressure was recorded in position 3.

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