Department of Ultrasound, Second Xiangya Hospital of Central South University, 139 Middle Renmin Rd, 410011 Changsha, Hunan, China.
J Ultrasound Med. 2013 Jul;32(7):1227-32. doi: 10.7863/ultra.32.7.1227.
This study aimed to establish reference ranges for Doppler parameters of the fetal dorsalis pedis artery and to compare them with those of the anterior tibial artery.
Dorsalis pedis artery velocimetry was performed in 138 singleton fetuses. Intraobserver repeatability coefficients and differences between measurements of bilateral legs were also evaluated. Comparisons were made between the pulsatility index in the dorsalis pedis and anterior tibial arteries.
The average maximum velocity of the dorsalis pedis artery increased from approximately 12.2 cm/s at 18 weeks' gestation to 33.6 cm/s at 39 weeks' gestation, whereas the minimum velocity did not show any significant variation during the observed gestational weeks. The average pulsatility index increased from about 2.0 at 18 weeks' gestation to 3.1 at 39 weeks' gestation. The pulsatility index was lower in the dorsalis pedis artery than in the anterior tibial artery.
Doppler parameters of the dorsalis pedis artery can be easily and accurately acquired by trained examiners and therefore are potential means for evaluating related fetal vascular development. However, it is still unclear whether changes exist in fetuses with limb diseases, and further investigation is needed.
本研究旨在建立胎儿足背动脉多普勒参数的参考范围，并将其与胫前动脉的参数进行比较。
对 138 例单胎胎儿进行足背动脉血流速度测量。还评估了观察者内重复性系数和双侧腿测量值之间的差异。比较了足背和胫前动脉的搏动指数。
足背动脉的平均最大速度从 18 周妊娠时的约 12.2cm/s 增加到 39 周妊娠时的 33.6cm/s，而最小速度在观察到的妊娠周内没有显示出任何显著变化。平均搏动指数从 18 周妊娠时的约 2.0 增加到 39 周妊娠时的 3.1。足背动脉的搏动指数低于胫前动脉。
经过培训的检查者可以轻松准确地获得足背动脉的多普勒参数，因此是评估相关胎儿血管发育的潜在手段。然而，肢体疾病胎儿是否存在变化尚不清楚，需要进一步研究。
