Lubusky Marek, Prochazka Martin, Langova Martina, Vomackova Katherine, Cizek Ludek
Department of Obstetrics and Gynecology, Palacky University, Teaching Hospital, Olomouc, Czech Republic.
Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub. 2007 Dec;151(2):323-6. doi: 10.5507/bp.2007.055.
A comparison of fetal ultrasonographic biometric parameters of the head (head circumference - HC, biparietal diameter - BPD) in breech presented fetuses.
Ultrasound biometry was performed in accordance with the method presented in the reference tables. In all breech presented fetuses, the HC, BPD and FL (femur length) were measured. High-risk and multiple pregnancies were excluded from the study.
A total of 111 ultrasonographic biometries were performed between the 31(st) - 38(th) week of gestation. Fetuses in the breech position had a significantly lower BPD compared to HC and FL. The difference between BPD and HC was 16.2 days (95%Cl 14.3-18.1; p = 0.001). Maternal age at delivery was 20 - 36 years (average 28.1; median 28.0).
According to our results, fetuses in the breech position have a significantly lower BPD compared to HC or FL. HC and FL parameters correlate with gestational age. In cases of ultrasonographic biometric discrepancy between BPD and FL, the fetal position should be taken into account. Breech-presented fetuses have an elongated head shape and ultrasound biometrics should evaluate its circumference (HC). It is important to responsibly interpret the results so as not to stress the expecting mother with suspicions of fetal pathology.
比较臀位胎儿头部的超声生物测量参数（头围 - HC、双顶径 - BPD）。
根据参考表中给出的方法进行超声生物测量。对所有臀位胎儿测量 HC、BPD 和股骨长度（FL）。该研究排除了高危妊娠和多胎妊娠。
在妊娠第 31 至 38 周期间共进行了 111 次超声生物测量。与 HC 和 FL 相比，臀位胎儿的 BPD 显著更低。BPD 和 HC 的差异为 16.2 天（95%置信区间 14.3 - 18.1；p = 0.001）。分娩时产妇年龄为 20 - 36 岁（平均 28.1；中位数 28.0）。
根据我们的结果，与 HC 或 FL 相比，臀位胎儿的 BPD 显著更低。HC 和 FL 参数与孕周相关。在 BPD 和 FL 的超声生物测量存在差异的情况下，应考虑胎儿位置。臀位胎儿头部形状拉长，超声生物测量应评估其头围（HC）。负责任地解读结果很重要，以免让准妈妈因怀疑胎儿病理而感到焦虑。
