Anatomical variation of bony pelvis from the viewpoint of transobturator sling placement for stress urinary incontinence

INTRODUCTION AND HYPOTHESIS: The aim of the study was to investigate the variability of bony pelvis architecture from the viewpoint of transobturator sling placement. METHODS: The pelvimetry was performed on 122 women who underwent pelvic computed tomography. Measurements included: the distance between the interobturator foramina line and inferior pubic symphysis (IF-PS distance) as well as pubic arch angle, pubic ramus width, and pubic symphysis length. RESULTS: The length of the IF-PS distance varied between 7.4 and 26.9 mm (mean 15.2 ± 4.3 mm, median 14.2 mm). The distribution of measurements was asymmetrical with a tilt of the values towards shorter distances. In 11.5% of women, the IF-PS distance was longer than 20 mm. The IF-PS distance correlated with the pubic ramus width (r = 0.37, p < 0.0001) and pubic arch angle (r = −0.22, p = 0.017). CONCLUSION: The IF-PS distance varies considerably in the general population of women.