Wijma Jacobus, Weis Potters Annemarie E, van der Mark Thomas W, Tinga Dick J, Aarnoudse Jan G
Martini Hospital Groningen, Groningen, The Netherlands.
Neurourol Urodyn. 2007;26(3):372-6. doi: 10.1002/nau.20354.
(i) To describe the displacement and recovery of the vesical neck position during pregnancy and after childbirth and (ii) to discriminate between compliance of the vesical neck supporting structures with and without pelvic floor contraction.
We focussed on the biomechanical properties of the vesical neck supporting structures during pregnancy and after childbirth by calculating the compliance and the hysteresis as a result from of abdominal pressure measurements and simultaneous perineal ultrasound.
This study shows that compliance of the supporting structures remains relatively constant during pregnancy and returns to normal values 6 months after childbirth. Hysteresis, however, showed an increase after childbirth, persisting at least until 6 months post partum.
Vaginal delivery may stretch and or load beyond the physiological properties of the pelvic floor tissue and in this way may lead to irreversible changes in tissue properties which play an important role in the urethral support continence mechanism.
（i）描述孕期及产后膀胱颈位置的移位及恢复情况；（ii）区分膀胱颈支撑结构在盆底收缩和未收缩时的顺应性。
通过计算腹部压力测量及同步会阴超声结果得出的顺应性和滞后现象，我们重点研究了孕期及产后膀胱颈支撑结构的生物力学特性。
本研究表明，支撑结构的顺应性在孕期保持相对稳定，并在产后6个月恢复至正常水平。然而，滞后现象在产后有所增加，至少持续至产后6个月。
阴道分娩可能会使盆底组织拉伸和/或负荷超出其生理特性，从而可能导致组织特性发生不可逆变化，而这些变化在尿道支撑控尿机制中起着重要作用。
