OC25.04: A study on the practicality of the semi‐automatic measurement for the urogenital hiatus

Abstract

The purpose of this study is to evaluate whether real-time shear wave elastography can detect the difference of the elastic modulus between contracting state and resting state in the levator ani muscle and to evaluate the feasibility of real-time shear wave elastography in comparing the elastic modulus of contracting and resting state of the levator ani muscle. Methods: Study 24 cases of female patients who were examined by perineal ultrasound, all the examinations were completed by the same doctor. The average values of Young's modulus (KPa) displayed by SWE were taken. The sampling box was placed at the junction of levator ani muscle and the inferior branch of the pubis and belly of levator ani muscle. The Young's modulus of the patient under the resting state and the maximum contraction state were measured. Results: The belly of the levator ani muscle: The Young's modulus was average (32.9 + 16.5) KPa in the resting state and the average (75.4 + 44.4) KPa under the maximum contraction state. The difference between the two was statistically significant (P < 0.01).The junction of levator ani muscle and the inferior branch of the pubis: The Young's modulus was average (28.2 + 15.7) KPa in the resting state and the average (84.6 + 36.5) KPa (P<0.001) under the maximum contraction state. Conclusions: Real-time shear wave elastic imaging can detect the difference of Young's modulus at resting and contraction states, and the Young's modulus is obviously greater under contraction states than that of under the state of resting state. Real-time shear wave elastography can be used as a useful tool for evaluating the contractile function of the levator ani muscle. SWE technology can evaluate the modulus of elasticity of LAM contraction state. OC25.02Fetal head engagement is associated with larger pelvic hiatal dimensions in nulliparous women at term