OP20.01: Clinical value of the angular parameter variation of anterior compartment by transperineal ultrasonography

To evaluate the angular parameter variation of anterior compartment, then explored the relevance between it and the anterior compartment prolapsed measured by transperineal ultrasonography. Transperineal ultrasound images was performed on 192 female patients without prolapse and 450 female patients with prolapse by 2 doctors. The angular parameters were detected when at rest and on maximum Valsalva manoeuvre respectively. The angle between the straight line connecting the bladder neck to the inferior margin of the pubis symphysis and the midline of the pubis symphysis (α), the cystourethral posterior angle (b) and the inclining urethral angle (γ) were detected and compared. Then we analysed the relevance between the angular parameters and the degree of the anterior compartment prolapse (1th to 3rd degree). The interclass correlation coefficient (ICC) of angle α,b,γ between 2 doctors respectively were 0.736, 0.641, 0.635 at reat, and they were 0.794, 0.659, 0.739 on maximum Valsalva manoeuvre, angle α,b,γ both at rest and on maximum Valsalva manoeuvre between in non-parous and parous without significant(p>0.05), angle α at rest among the four groups (non-prolapse group, 1th to 3rd degree prolapse group) were significant (p<0.01), angle α,b,γ on maximum Valsalva manoeuvre among the 4 groups were significant (p<0.01), the correlation coefficient of angle a,b,γ between the anterior compartment angular parameter variation and the anterior compartment prolapsed respectively were 0.966, 0.428, 0.878, with significances. The angle α,b,γ could be changed with the anterior compartment prolapse; angle α could be a quick and efficient ultrasonographic parameter for evaluating the degree of the anterior compartment prolapsed, with the high correlation coefficient and no influence in measurements with the angle between the horizontal reference line inferior margin of the pubis symphysis and the midline of the pubis symphysis.