Gasser B, Ditesheim P J, Willemetz J C
Gynakol Rundsch. 1989;29(1):22-31.
The recent development of ultrasound techniques linked to a continuous or pulsed Doppler system allows an immediate and atraumatic study of fetal blood flow to be performed. Using pulsed Doppler techniques, blood velocity waves can be analyzed and blood flow can then be calculated using ultrasound to determine the diameter of the fetal vessel; the result is expressed in milliliters per minute. A study of aortic and umbilical venous blood flow has been carried out with a prototype pulsed Doppler system with 128 gates. The same probe was used to obtain pictures by B mode ultrasound as well as to generate Doppler waves. The study group consisted of 90 normal pregnancies between 32 and 41 weeks of gestation. The umbilical venous blood flow has been measured in 50 subjects and the aortic blood flow in 79 subjects. The average aortic blood flow varied from 345 to 618 ml/min. In the umbilical vein, the flow was between 240 and 420 ml/min. It was noticed that as pregnancy advanced, blood flow slightly increased. The paper discusses the results obtained and the problems encountered with this method.
与连续或脉冲多普勒系统相关的超声技术的最新发展，使得能够对胎儿血流进行即时且无创的研究。使用脉冲多普勒技术，可以分析血流速度波，然后利用超声确定胎儿血管直径来计算血流量；结果以每分钟毫升数表示。已使用具有128个采样门的脉冲多普勒系统原型对主动脉和脐静脉血流进行了研究。同一探头用于通过B型超声获取图像以及生成多普勒波。研究组由90例妊娠32至41周的正常孕妇组成。对50名受试者测量了脐静脉血流量，对79名受试者测量了主动脉血流量。主动脉平均血流量在345至618毫升/分钟之间变化。在脐静脉中，血流量在240至420毫升/分钟之间。注意到随着妊娠进展，血流量略有增加。本文讨论了所获得的结果以及该方法遇到的问题。
