Poll V
Br J Obstet Gynaecol. 1976 Mar;83(3):217-20. doi: 10.1111/j.1471-0528.1976.tb00812.x.
Ultrasonic measurement of the biparietal diameter is a frequently used technique in the assessment of fetal maturity. The popularity of this technique is based partly upon the claim that it can be performed with considerable presicion, but recently published work has not supported this claim. This paper describes a blind clinical trial in which the precision of a single biparietal measurement was determined under normal clinical conditions. The results show that this measurement can be determined with a precision better than +/- 1.6 mm (+/- 2 standard deviations). The clinical significance of this result is discussed.
超声测量双顶径是评估胎儿成熟度时常用的一项技术。这项技术之所以流行，部分原因在于宣称其能以相当高的精度进行测量，但最近发表的研究并不支持这一说法。本文描述了一项盲法临床试验，该试验在正常临床条件下测定了单次双顶径测量的精度。结果表明，这一测量的精度优于±1.6毫米（±2个标准差）。本文还讨论了这一结果的临床意义。
