Objective To observe pulsative index (PI), resistant index (RI) of placental helicine arteries by colour Doppler, analyses relation between PI, RI and developing of pregnant hypertension.
目的本研究采用彩色多普勒检测孕妇子宫胎盘床螺旋
脉
数（PI），阻力数（RI），预测妊
征的发生、发展及预
。
Objective To observe pulsative index (PI), resistant index (RI) of placental helicine arteries by colour Doppler, analyses relation between PI, RI and developing of pregnant hypertension.
目的本研究采用彩色多普勒检测孕妇子宫胎盘床螺旋脉数（PI），阻力数（RI），预测妊征的发生、发展及预。
：以上例句、词性分类均由互联网资源自
生成，部分未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们
正。
