Gilani Syed Amir, Javaid Amber, Bala Alsafi Abdella
Ian Donald Interuniversity School for Obstetrical and Gynecological Ultrasound, Pakistani branch, Faculty of Radiological Sciences and Medical Imaging, Alzaiem Alazhari University, Khartoum, Sudan.
Med Ultrason. 2010 Jun;12(2):110-3.
To evaluate the ductus venosus hemodynamic parameters in 31-40 weeks gestation normal fetus in the Pakistani population using Doppler ultrasonography.
In a standardized protocol 106 pregnant women (31 to 40 gestation weeks) were scanned. The peak systolic velocity (maximum velocity during S wave) (PSV), peak velocity index (peak velocity S wave minus peak velocity A wave/peak velocity D wave) (PVI), and S/A ratio (peak velocity S wave/peak velocity A wave) were measured.
Out of 106 patients, 100 patients were successfully scanned (94% success rate). In the 31-35 weeks gestational age group the mean PSV was 59.7 cm/s, PI 0.7, and S/A 2.16. In the 36-40 weeks gestational age group the mean PSV was 72.9 cm/s, PI 0.42, and S/A 2.46.
As the normal pregnancy advances the PSV, the flow resistance and S/A ratio in ductus venosus increase.
使用多普勒超声评估巴基斯坦人群中孕31至40周正常胎儿的静脉导管血流动力学参数。
按照标准化方案对106名孕周为31至40周的孕妇进行扫描。测量收缩期峰值流速（S波期间的最大流速）（PSV）、峰值流速指数（峰值流速S波减去峰值流速A波/峰值流速D波）（PVI）以及S/A比值（峰值流速S波/峰值流速A波）。
106例患者中，100例成功完成扫描（成功率94%）。在孕31 - 35周年龄组中，平均PSV为59.7厘米/秒，PI为0.7，S/A为2.16。在孕36 - 40周年龄组中，平均PSV为72.9厘米/秒，PI为0.42，S/A为2.46。
随着正常妊娠进展，静脉导管的PSV、血流阻力和S/A比值增加。
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