【摘要】 <正> 了解胎儿在子宫内的生长发育是否符合妊娠周数,对妊娠期的正确处理具有重要的意义。估计妊娠周数的方法有多种,利用超声探测是一种较为准确的方法。妊娠13周前超声测量胎儿顶臀长度,和妊娠26周前测量胎头双顶径均比较准确。但亦有认为在27周后超声测量胎头双顶径的准确度则明显下降。最近,一些学者提出妊娠中期的前半段超声测量胎儿股骨长度可以更准确地推测妊娠周数,并认为在妊娠中期后股骨长度的探测仍然精确。更多还原

【Abstract】 Measurement of the fetal femur length was made with a linear array, real-time lutrasound scanner with freeze frame and electronic caliper in 171 gravid women from 24-42 weeks’ gestation. Fetal biparietal diameter was measured in each case for comparison. Analysis of the data by means of least-square linear regression generated the foliowing equation: Y = 0.2837++++0.1781X (Y = femur length; X = gestational age). The result showed a high degree of correlation coefficient (r = 0.9455) in the relationship between fetal femur length and gestational age which is higher than that between fetal biparietal diameter and gestational age. The relationship between femur length and biparietal diameter is linear with only small variability throughout gestrtaon. Furthermore, it has also shown that ultrasonic measurement of the femur length is highly reproducible within a 2 mm range and real-time equipment has allowed easy measurement of femur length. These results suggest that the ultrasonic measurement of the fetal femur length can be added to those already in use as a sensitive and precise method for estimation of intrauterine fetal growth and development, and is particular in clinical significance as used in association with measurement of the biparietal diameter.更多还原