Batra A, Chellani H K, Mahajan J, Suri S, Das S K
Department of Obstetrics & Gynaecology, Safdarjang Hospital, New Delhi.
Indian J Med Res. 1990 Dec;92:399-403.
Ultrasonic biparietal diameter (BPD), femur length, abdominal circumference, femur length/abdominal circumference ratio, estimated fetal weight, ponderal index, estimated fetal length were measured within 72 h of delivery of 30 small-for-date (SFD) and 174 non-SFD newborns. Evaluation of each ultrasound variable in the antenatal diagnosis of SFD fetus was assessed. Abdominal circumference and estimated fetal weight were the best predictors in confirming SFD in 73.3 and 76.6 per cent respectively, followed by BPD (63.3%). Other variables (femur length, femur length/abdominal circumference ratio, estimated fetal length and ponderal index) were less accurate in diagnosis of SFD babies. For all variables studied negative predictive value was high (almost 90% or above). However, positive predictive value for abdominal circumference and estimated fetal weight were satisfactory. This study demonstrates the usefulness of abdominal circumference and estimated fetal weight in recognising SFD. It also shows that various growth variables could be used to rule out the diagnosis of IUGR with reasonable accuracy (negative predictive value greater than or equal to 90).
在30例小于胎龄儿（SFD）和174例非小于胎龄儿的新生儿出生后72小时内，测量其超声双顶径（BPD）、股骨长度、腹围、股骨长度/腹围比值、估计胎儿体重、 ponderal指数、估计胎儿长度。评估每个超声变量在产前诊断SFD胎儿中的作用。腹围和估计胎儿体重分别是确诊SFD的最佳预测指标，确诊率分别为73.3%和76.6%，其次是双顶径（63.3%）。其他变量（股骨长度、股骨长度/腹围比值、估计胎儿长度和ponderal指数）在诊断SFD婴儿时准确性较低。对于所有研究变量，阴性预测值较高（几乎90%或以上）。然而，腹围和估计胎儿体重的阳性预测值令人满意。本研究证明了腹围和估计胎儿体重在识别SFD中的有用性。它还表明，各种生长变量可用于以合理的准确性排除宫内生长受限的诊断（阴性预测值大于或等于90）。
