Backe B, Nakling J
Norwegian Institute of Hospital Research, Trondheim.
Acta Obstet Gynecol Scand. 1994 Feb;73(2):113-8. doi: 10.3109/00016349409013412.
Evaluation of the precision of routine ultrasound term prediction.
Population based follow-up without intervention.
Ultrasound screening in routine clinical practice.
1650 women residing in one Norwegian county giving birth during a 12-month period. All pregnancies were singleton with spontaneous onset of labor, all records contained a term predicted with routine ultrasound in the second trimester.
Difference between actual and predicted day of delivery, and difference between ultrasound predicted term and term calculated from last menstrual period.
More women delivered within two weeks of ultrasound term than two weeks of term calculated from the last menstrual period (87.5% and 79.3%, p < 0.001). Deliveries were significantly closer to the ultrasound predicted term than the term calculated from the last menstrual period, with the exception of deliveries in the 39th week after LMP where no significant difference was found between ultrasound term and LMP-term. No difference was found in the mean performance of 14 different ultrasound operators.
In a population representative of deliveries in one county, routine ultrasound term prediction performed in three medium sized hospitals more accurately predicted day of delivery than term calculated from the date of last menstrual period.
评估常规超声孕周预测的准确性。
基于人群的无干预随访。
常规临床实践中的超声筛查。
居住在挪威一个郡的1650名妇女在12个月期间分娩。所有妊娠均为单胎且自然临产，所有记录均包含孕中期常规超声预测的孕周。
实际分娩日期与预测分娩日期的差异，以及超声预测孕周与根据末次月经计算的孕周的差异。
与根据末次月经计算的孕周相比，更多妇女在超声预测孕周的两周内分娩（分别为87.5%和79.3%，p<0.001）。分娩日期与超声预测孕周的接近程度显著高于根据末次月经计算的孕周，但在末次月经后第39周分娩的情况除外，此时超声孕周与末次月经孕周之间未发现显著差异。14名不同超声操作员的平均表现未发现差异。
在一个郡具有代表性的分娩人群中，三家中型医院进行的常规超声孕周预测比根据末次月经日期计算的孕周更准确地预测了分娩日期。
