通过盆底动态三维超声图像评估阴道高压区。
Vaginal high-pressure zone assessed by dynamic 3-dimensional ultrasound images of the pelvic floor.
作者信息
Jung Sung-Ae, Pretorius Dolores H, Padda Bikram S, Weinstein Milena M, Nager Charles W, den Boer Derkina J, Mittal Ravinder K
机构信息
Pelvic Floor Function and Disorder Group, University of California, San Diego, School of Medicine, San Diego, CA, USA.
出版信息
Am J Obstet Gynecol. 2007 Jul;197(1):52.e1-7. doi: 10.1016/j.ajog.2007.04.026.
OBJECTIVE
The purpose of this study was to determine the shape and characteristics of the vaginal high-pressure zone (HPZ) by imaging a compliant fluid-filled bag that had been placed in the vaginal HPZ with the 3-dimensional ultrasound system.
STUDY DESIGN
Nine nulliparous asymptomatic women underwent 3-dimensional ultrasound imaging and vaginal pressure measurements. A compliant bag was placed in the vagina and filled with various volumes of water. Three-dimensional ultrasound volumes of the pelvic floor were obtained at each bag volume while the subjects were at rest and during pelvic floor contraction.
RESULTS
At low volumes, the bag was collapsed for a longitudinal extent of approximately 3.3 +/- 0.2 cm (length of vaginal HPZ). With increasing bag volume, there was opening of the vaginal HPZ in the lateral dimension before the anteroposterior dimension. Pelvic floor contraction produced a decrease in the anteroposterior dimension but not the lateral dimension of the bag in the region of the vaginal HPZ.
CONCLUSION
We propose that the shape and characteristics of the vaginal HPZ are consistent with the hypothesis that the puborectalis muscle is responsible for the genesis of the vaginal HPZ.
目的
本研究的目的是通过使用三维超声系统对放置在阴道高压区（HPZ）的一个可顺应的充液袋进行成像，来确定阴道高压区的形状和特征。
研究设计
九名未生育的无症状女性接受了三维超声成像和阴道压力测量。一个可顺应的袋子被放置在阴道内并填充不同体积的水。在每个袋子体积下，当受试者休息时以及盆底收缩时，获取盆底的三维超声容积。
结果
在低体积时，袋子在纵向大约3.3±0.2厘米的范围内塌陷（阴道高压区的长度）。随着袋子体积增加，阴道高压区在横向维度上比前后维度更早打开。盆底收缩导致阴道高压区区域袋子的前后维度减小，但横向维度未减小。
结论
我们提出，阴道高压区的形状和特征与耻骨直肠肌是阴道高压区形成原因这一假说相符。
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