双顶径：确定人工流产胎儿孕周的一项有用指标。
Biparietal diameter: a useful measure for determining gestational age of human abortuses.
作者信息
Sailaja K, Ahuja R K, Gopinath G
机构信息
Department of Anatomy, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India.
出版信息
Natl Med J India. 1996 Jul-Aug;9(4):165-7.
BACKGROUND
The crown-rump length is conventionally used to determine the age of human abortuses. However, it is not reliable as it is dependent on the positioning of the conceptus. We compared this with the biparietal diameter and foot length for determining the gestational age.
METHODS
Different measurements, commonly used to assess gestational age, were measured in 146 human abortuses for which an accurate obstetric history could not be elicited. Measurements taken were crown-rump length, biparietal diameter and foot length. These were correlated with the observations at antenatal examinations before finalizing the approximate age.
RESULTS
Multiple regression analysis of the data indicated that of the three measurements, the biparietal diameter was the most reliable for determining foetal gestational age between 8 and 26 weeks. The age determined with the biparietal diameter correlated well with that of abortuses with an accurate obstetric history.
CONCLUSION
The biparietal diameter of a human foetus may be used to determine its age if the obstetric history regarding the period of gestation is vague or not available.
背景
传统上使用头臀长来确定人工流产胎儿的孕周。然而，由于它依赖于胎儿的位置，所以并不可靠。我们将其与双顶径和足长进行比较以确定孕周。
方法
对146例无法获取准确产科病史的人工流产胎儿进行了常用于评估孕周的不同测量。测量的指标有头臀长、双顶径和足长。在确定大致孕周之前，将这些测量结果与产前检查的观察结果进行关联。
结果
对数据的多元回归分析表明，在这三项测量中，双顶径在确定8至26周胎儿孕周时最为可靠。用双顶径确定的孕周与有准确产科病史的流产胎儿的孕周相关性良好。
结论
如果关于妊娠期的产科病史不明确或无法获取，胎儿的双顶径可用于确定其孕周。
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