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本研究应用彩色多普勒对正常妊娠及妊高征（ＰＩＨ）患者的脐动脉（ＵｍＡ）血流的收缩期峰值流速（Ｓ）与舒张末期流速（Ｄ）比值（Ｓ／Ｄ）的变化，结合胎盘微血管的改变，进行了相关性分析，现将结果报告如下。１ 资料与方法１１ 研究对象 １９９６年５月至１９９８年
In this study, changes of peak systolic flow velocity (S) and diastolic flow velocity (D) ratio (S / D) in umbilical artery (UmA) blood flow in patients with normal pregnancy and PIH were analyzed by color Doppler. Combined with changes in placental microvascular, a correlation analysis, the results are reported as follows. 1 Materials and Methods 1 1 research object May 1996 to 1998