Department of Obstetrics and Gynecology, Eastern Virginia Medical School, 825 Fairfax Ave, Suite 310, Norfolk, VA 23507 USA.
J Ultrasound Med. 2014 Feb;33(2):323-8. doi: 10.7863/ultra.33.2.323.
The aim of this pilot study was to measure the angle of rotation of the uterus at the fundus from horizontal using 3-dimensional sonography in women presenting for annual gynecologic examinations.
A total of 51 patients participated in the study. All patients underwent transvaginal sonography, and 3-dimensional volumes were acquired. The cervicouterine angle and the angle of rotation at the fundus were measured.
The uteri were noted to be anteverted in 64.7%, retroverted in 25.5%, and euverted in 9.8%. They were noted to be pointing toward the right side of the pelvis in 49.0%, to the left side in 39.2%, and at the midline in 11.8%. The median cervicouterine angle was 122° (interquartile range [IQR], 105°-137°). The median angle of rotation at the fundus away from horizontal in either a clockwise or counterclockwise direction on the transverse B-plane was 10.4° (IQR, 7.1°-19.0°), with a maximal angle of 43°, and on the coronal C-plane, it was 10.0° (IQR, 3.0°-20.0°), with a maximal angle of 43°. Noneuverted uteri were more likely to be rotated at the fundus.
Our study reveals that, contrary to traditional thinking, the uterus can be rotated at the fundus in relation to the body (z-axis) along the longitudinal axis of the cervical canal.
本初步研究旨在通过对行年度妇科检查的女性进行经阴道三维超声检查，测量子宫底在水平面上的旋转角度。
共有 51 例患者参与了本研究。所有患者均接受经阴道超声检查，并采集三维容积。测量宫颈-子宫角和子宫底的旋转角度。
子宫前屈占 64.7%，后屈占 25.5%，水平位占 9.8%。子宫指向骨盆右侧占 49.0%，左侧占 39.2%，中线占 11.8%。宫颈-子宫角的中位数为 122°（四分位间距[IQR]，105°-137°）。在横轴 B 平面上，子宫底顺时针或逆时针远离水平方向的旋转角度中位数为 10.4°（IQR，7.1°-19.0°），最大角度为 43°；在冠状 C 平面上，旋转角度中位数为 10.0°（IQR，3.0°-20.0°），最大角度为 43°。非水平位的子宫更易发生子宫底旋转。
与传统观念相反，我们的研究表明子宫可以沿着宫颈管的纵轴在子宫底围绕身体（z 轴）旋转。
