Jurkovic D, Jauniaux E, Kurjak A, Hustin J, Campbell S, Nicolaides K H
Ultrasonic Institute, Medical Faculty, University of Zagreb, Yugoslavia.
Obstet Gynecol. 1991 Mar;77(3):365-9.
Transvaginal color Doppler was used to investigate the uteroplacental circulation of 45 patients with normal intrauterine pregnancies at 4-18 weeks' gestation. The main uterine artery and the radial and spiral arteries were demonstrated, and characteristic flow velocity waveforms were obtained in more than 90% of cases. The indices of impedance to flow decreased with gestation and there was a progressive fall in these indices from the uterine artery, through the radial, to the spiral artery. Blood velocity in the uterine artery increased exponentially with gestation.
采用经阴道彩色多普勒技术对45例妊娠4 - 18周宫内妊娠正常的患者进行子宫胎盘循环研究。显示了子宫主要动脉以及放射状动脉和螺旋动脉，并在90%以上的病例中获得了特征性的血流速度波形。血流阻抗指数随孕周增加而降低，且这些指数从子宫动脉经放射状动脉到螺旋动脉呈逐渐下降趋势。子宫动脉中的血流速度随孕周呈指数增加。
