St Mary's Hospital, Imperial College Healthcare NHS Trust, London, UK.
Neurourol Urodyn. 2012 Apr;31(4):502-7. doi: 10.1002/nau.21181. Epub 2011 Dec 20.
To compare the urethral sphincter morphology and levator hiatal dimensions between white and black premenopausal nulliparous asymptomatic women using 3D/4D translabial ultrasonography.
Nulliparous black and white women were recruited in a tertiary gynecological center. All women were completely asymptomatic for pelvic floor dysfunction. Women were assessed with 3D/4D translabial ultrasound scan of the pelvic floor, at rest. Measurements of the total urethral sphincter volume (TSV), rhabdosphincter volume, (RSV) and levator hiatal dimensions (LH) were taken at rest, after voiding.
Twenty-three white and 14 black women (37 in total) were investigated. Subjects did not differ by age or body mass index (BMI). Black women were found to have significantly larger rhabdosphincters (RS) than their white counterparts (8.88 cm(3) ± 1.65 vs. 5.97 cm(3) ± 1.82, respectively, P = 0.000). With respect to levator hiatal dimensions at rest, black women had a significantly wider transverse diameter (LHt) than white women (mean difference of LHt = 0.43 cm, 95% CI 0.08-0.78, P < 0.05).
Asymptomatic black nulliparous women have significantly larger rhabdosphincters than their white counterparts. Racial differences in the female urethral morphology could provide an insight on the pathophysiology of stress urinary incontinence.
使用三维/四维经会阴超声比较白种和黑种绝经前、无症状、初产妇的尿道括约肌形态和肛提肌裂孔尺寸。
在一家三级妇科中心招募初产妇的白种和黑种女性。所有女性均无盆底功能障碍相关的任何症状。对所有女性进行三维/四维经会阴盆底超声扫描检查，在静息和排尿后分别测量总尿道括约肌体积（TSV）、肛提肌体积（RSV）和肛提肌裂孔尺寸（LH）。
共调查了 23 名白种女性和 14 名黑种女性（共 37 名）。两组在年龄和体重指数（BMI）方面无差异。与白种女性相比，黑种女性的肛提肌（RS）明显更大（8.88cm3±1.65 比 5.97cm3±1.82，P=0.000）。在静息时的肛提肌裂孔尺寸方面，黑种女性的横向直径（LHt）明显大于白种女性（LHt 的平均差异为 0.43cm，95%CI 0.08-0.78，P<0.05）。
无症状的黑种初产妇的肛提肌明显大于白种初产妇。女性尿道形态的种族差异可能为压力性尿失禁的病理生理学提供了一个见解。
