Ragosch V, Entezami M, Hundertmark S, Mutz A, Becker R, Weitzel H
Universitätfrauenklinik im Klinikum Benjamin Franklin, Freien Universität Berlin.
Ultraschall Med. 1997 Feb;18(1):19-25. doi: 10.1055/s-2007-1000510.
To determine the quality of prenatal sonographic weight estimation, comparing breech and vertex presentations.
In 147 breech presentations (BP) and 149 vertex presentations (VP), the biparietal head diameter (BPD), the fronto-occipital head diameter (FOD) and the transverse abdominal diameter (ATD) were measured. From these data, the weight was estimated, using Shepard's formula before 28 weeks and Hansmann's thereafter, and compared to the delivery weight. Both formula were modified to incorporate the virtual BPD (vBPD), derived from the BPD, FOD and the calculated head circumference. In the BP group, the role of examiner skills was evaluated, comparing the accuracy of experienced (DEGUM II qualifications) and average individuals.
The accuracy for BP was nearly identical to that for VP (= 0.915 vs. = 0.929). The examiners' qualifications had a detectable but not significant influence on the results (= 0.942 vs. = 0.892).
Ultrasound measurements yield comparable results in both BP and VP, if the vBPD is used. In our opinion, ultrasonic weight estimation is a useful adjunct when determining the manner of delivery in BP.
比较臀位和头位，确定产前超声体重估计的质量。
对147例臀位（BP）和149例头位（VP）测量双顶径（BPD）、枕额径（FOD）和腹横径（ATD）。根据这些数据，在28周前使用谢泼德公式、之后使用汉斯曼公式估计体重，并与出生体重进行比较。两种公式均进行了修改，纳入了从BPD、FOD和计算出的头围得出的虚拟双顶径（vBPD）。在BP组中，比较经验丰富者（具备德国妇产超声学会二级资质）和普通人员的准确性，评估检查者技能的作用。
BP的准确性与VP几乎相同（分别为0.915和0.929）。检查者资质对结果有可察觉但不显著的影响（分别为0.942和0.892）。
如果使用vBPD，超声测量在BP和VP中产生的结果相当。我们认为，超声体重估计在确定BP的分娩方式时是一种有用的辅助手段。
