The relation of the pelvis and the perineal function in incontinent women: A neglected subject.

Aims: To Compare the angular parameters of the pelvis of continents and incontinent women and to correlate them with the electrical activity and the function of the pelvic floor muscles.

Methods: Cross-sectional study. Incontinent and continent women, aged between 18 and 59 years. The anatomical points were marked following the SAPO protocols, the photographic records were made and analyzed through the SAPO Software. The evaluation of the function of the MPF was performed by bidigital vaginal palpation, using the PERFECT scheme. Surface electromyographic analysis was performed in dorsal decubitus and orthostasis.

Results: The sample consisted of 40 women, 20 with SUI (IG) and 20 continents (CG), matched by age. The mean age in the CG was 43.5 years (SD 8.4), while in the IG it was 47.1 years (SD 7.8) (P = 0.16). The pelvic angle in the CG presented a mean of -14.3 ± 4.6 and the IG -16.6 ± 4.4 (P = 0.02). When compared to normality, IG presented an accentuation of anterior slope in both analyzed views (P = 0.01). There was a moderate correlation in the IG between the electrical activity of the basal pelvis in orthostasis and the anterior pelvic tilt angles in the right lateral views r = 0.51 (P = 0.02) and left lateral r = 0.46 (P = 0.04). No correlation was found in the CG.

Conclusions: In the present sample, incontinent women have a greater anterior slope of the pelvis, and the greater the degree of anterior slope, the greater the electrical activity of the PFM, during rest, and in orthostasis.