Department of Radiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Clinical Research Unit, Mashhad University of Medical Sciences, Mashhad, Iran.
J Ultrasound Med. 2021 Oct;40(10):2133-2140. doi: 10.1002/jum.15598. Epub 2020 Dec 17.
There has been a dearth of an accurate and reliable method for the measurement of fetal pelvic bones. In this study, we describe a novel, easy-to-use method for ischial and iliac bone measurement in fetal ultrasound scanning.
This prospective cross-sectional study was performed on 1179 pregnant women at 12 to 40 weeks of an uneventful gestation. Pelvic biometric indices, including the length of the ilium and ischium, were measured by a novel and easy method. Then data were analyzed by regression models to develop a formula for gestational age (GA) estimation based on pelvic bones.
The approximate ossification time of the ischium was determined to range between the 13th and 20th gestational weeks. We calculated 3 formulas using linear regression models: formula 1, GA (days) = 92.563 + (11.604 × ischial length); formula 2, GA (days) = 57.006 + (7.819 × iliac length); and formula 3, GA (days) = 65.809 + (5.610 × iliac length) + (3.431 × ischial length).
The 2-dash line method can contribute to efficient and precise ultrasound measurement of the ilium and ischium in pelvic biometry of the fetus.
目前缺乏一种准确、可靠的胎儿骨盆骨测量方法。本研究描述了一种在胎儿超声扫描中测量坐骨和髂骨的新的、易于使用的方法。
这是一项前瞻性的横断面研究，纳入了 1179 名孕 12 周至 40 周的无并发症孕妇。采用一种新的、简单的方法测量骨盆生物测量指数，包括髂骨和坐骨长度。然后通过回归模型对数据进行分析，以建立基于骨盆骨的胎龄（GA）估计公式。
坐骨的近似骨化时间确定在第 13 至 20 孕周之间。我们使用线性回归模型计算了 3 个公式：公式 1，GA（天）= 92.563 +（11.604 × 坐骨长度）；公式 2，GA（天）= 57.006 +（7.819 × 髂骨长度）；公式 3，GA（天）= 65.809 +（5.610 × 髂骨长度）+（3.431 × 坐骨长度）。
双划线法可有助于高效、精确地测量胎儿骨盆生物测量中的髂骨和坐骨。
