Tsuzaki T, Iwamoto K, Maeda K
Nihon Sanka Fujinka Gakkai Zasshi. 1982 Mar;34(3):315-20.
Ultrasonographic measurements of fetal limb bones were studied in the cases ranged from 15 to 41 weeks of gestation. The growths of BPD, fetal femur length (FFL) and fetal humerus length (FHL) were studied, though some cases showed the difficulty in fetal biparietal diameter (BPD) measurement due to either engagement into the pelvis or rotation of fetal head. Correlation between BPD ad FFL or FHL was also evaluated. 1) Both FFL and FHL showed linear growth patterns during 16 to 40 weeks of gestation. The correlation equation; Y = 0.20X - 0.85 (R = 0.99) was obtained where X was gestational age and Y was FFL. In another equation, Y = 0.16X - 0.28 (R = 0.99) when Y was FHL. These equations showed the increment of FFL and FHL are 2.0mm and 1.6mm per a week respectively. 2) Correlation coefficients between BPD and FFL or FHL were as high as 0.97 and 0.98 respectively. 3) Comparison of in vivo ultrasonic and postnatal radiographic measurements of the femur bone of an autopsied stillbirth infant showed that the ultrasonically measured FFL corresponded to the length of ossified part of the bone. 4) Both FFL and FHL were evaluated as useful as BPD for the estimation of gestation age.
对妊娠15至41周的病例进行了胎儿四肢骨骼的超声测量。研究了双顶径（BPD）、胎儿股骨长度（FFL）和胎儿肱骨长度（FHL）的生长情况，不过有些病例由于胎儿入盆或胎头旋转而难以测量胎儿双顶径（BPD）。还评估了BPD与FFL或FHL之间的相关性。1）FFL和FHL在妊娠16至40周期间均呈线性生长模式。得到相关方程：Y = 0.20X - 0.85（R = 0.99），其中X为孕周，Y为FFL。在另一个方程中，当Y为FHL时，Y = 0.16X - 0.28（R = 0.99）。这些方程表明FFL和FHL每周分别增加2.0mm和1.6mm。2）BPD与FFL或FHL之间的相关系数分别高达0.97和0.98。3）对一名死产儿尸体解剖的股骨进行体内超声测量与产后X线测量的比较表明，超声测量的FFL与骨化部分的长度相对应。4）FFL和FHL在估计孕周方面被评估为与BPD一样有用。
