Effect of pelvic position on ultrasonic measurement parameters of pelvic floor

Abstract

Abstract Objective To analyse the effect of pelvic position on ultrasonic measurement parameters of pelvic floor. Methods This study included 50 participants who visited Fujian Maternity and Child Health Hospital from May 2020 to May 2022. All participants were assessed by medical professionals for general information and Pelvic floor four dimensional ultrasound. Ultrasonic measurements were performed in three different positions of the pelvis (anterior pelvic tilt, posterior pelvic tilt, and neutral pelvic tilt) based on lithotomy position. Results Chi square test indicated that the differences in the diagnosis of urethral funnelling, cystocele, uterine prolapse, perineal overactivity, and hiatal ballooning among neutral position, anterior pelvic tilt, and posterior pelvic tilt were statistically significant (P = .008, P＜.001, P = .003, P＜.001, and P＜.001 respectively). Repeated ANOVA analysis showed that the difference among neutral position, anterior pelvic tilt, and posterior pelvic tilt in hiatal area (at contraction), hiatal area (at rest), hiatal area (at valsalva), bladder neck descent, urethral rotation angle, cervical descent, rectal ampulla descent, hiatal area increase, hiatal area decrease,cervical position (at rest), rectal ampulla position (at rest), bladder neck position(at valsalva), cervical position (at valsalva), and rectal ampulla position (at valsalva) were statistically significant (P < .001, P < .001, P < .001, P < .001, P = .001, P < .001, P < .001, P < .001, P < .001, P < .001, P < .001, P < .001, P < .001, and P < .001 respectively). Conclusion Participants perform pelvic floor muscle contraction and Valsalva maneuver better in posterior pelvic tilt than other positions. And posterior pelvic tilt thus became the position that the most pelvic organ prolapse were diagnosed.