Hashimoto B, Filly R A, Belden C, Callen P W, Laros R K
J Ultrasound Med. 1987 Feb;6(2):81-4. doi: 10.7863/jum.1987.6.2.81.
Oligohydramnios is an important factor influencing the management of postterm pregnancies. However, sonographic assessment of oligohydramnios has been based largely on the subjective judgement of the sonologist. From January 1982 to December 1984, 54 patients had articulated-arm B-scan ultrasound examinations and were identified as postterm. Of these patients, 25 were subjectively diagnosed as having oligohydramnios. Five patients were considered to have low normal amounts of amniotic fluid. The remainder were considered to have normal or greater than normal quantities of amniotic fluid. From this population, an amniotic fluid index was determined for each patient by finding the product of the length, width, and depth of the largest amniotic fluid pocket. Patients with a fluid index less than 60 showed a strong association with the postmaturity syndrome. Indeed, all but one postmature infant was born of a pregnancy with a fluid index less than 60. No other fetal or perinatal complications were statistically correlated with oligohydramnios in this small patient series.
羊水过少是影响过期妊娠处理的一个重要因素。然而，超声对羊水过少的评估很大程度上基于超声科医生的主观判断。1982年1月至1984年12月，54例患者接受了关节臂B型超声检查并被确定为过期妊娠。在这些患者中，25例被主观诊断为羊水过少。5例被认为羊水含量略低于正常。其余患者被认为羊水含量正常或高于正常。从这个群体中，通过计算最大羊水暗区的长、宽、深的乘积来确定每个患者的羊水指数。羊水指数小于60的患者与过期产综合征密切相关。事实上，除了一名过期产婴儿外，所有过期产婴儿均出生于羊水指数小于60的妊娠。在这个小样本患者系列中，没有其他胎儿或围产期并发症与羊水过少存在统计学相关性。
