Comparação de diferentes parâmetros de um dinamômetro de força transvaginal entre mulheres saudáveis e com incontinência urinária de esforço

Abstract

Changes in pelvic floor muscles (PMF) that occur in stress urinary incontinence (SUI) can be quantified using a transvaginal dynamometer. The objective of this study was to compare and test the accuracy of different parameters obtained by a transvaginal force dynamometer, from contraction of MAP, between healthy and SUI women. Seventeen healthy women (CG) and 17 women with stress urinary incontinence (GSUI) aged 20-60 years were included in this study. The MAP strength was evaluated by means of a transvaginal dynamometer, in a single test session. The data were collected with the patient in lithotomy, and the volunteers were instructed to perform a maximal contraction of the MAP and resist until exhaustion. The test was repeated three times with a 1 minute interval between tests. The dynamometric parameters used to evaluate the MAPs were: peak time (time at which the peak force occurred from the beginning of the MAP contraction), baseline (passive force), maximum force value of MAP contraction, contraction and mean contraction force of the MAP and endurance. The covariance analysis (ANCOVA) with Bonferrone's post hoc test showed that only the endurance variable was different between the groups (F=4.87, P=0.03; p2= 0.14). The accuracy of endurance to identify women with SUI was verified by the receiver operating characteristic curve (ROC). The area on the curve was 0.76 and the sensitivity and specificity were 76.60% for both conditions. In this study it was possible to verify that only the variable muscular resistance has moderate accuracy to identify women with stress urinary incontinence.