【摘要】 应用彩色多普勒超声血流显像系统检测胎儿脐动脉、大脑中动脉及孕妇子宫螺旋动脉等主要血管的血循环变化,通过测量其收缩期峰值流速与舒张期流速比值、阻力指数、搏动指数3项参数,能较好地反映胎盘循环的病理生理变化。脐动脉血流多普勒测值参数收缩期峰值流速与舒张期流速比值、阻力指数、搏动指数与孕周呈高度负相关;胎儿大脑中动脉血流各检测值均随孕龄增长而呈下降趋势;妊娠后孕妇子宫螺旋动脉的阻力指数、搏动指数低于妊娠前。多项指标联合运用可提高对围产儿不良结局预测的准确性与可靠性。更多还原

【Abstract】 The blood circulation in the fetal umbilical artery, middle cerebral artery and gravida uterus helicine artery was determined using color Doppler ultrasound. The pathophysiological conditions of placental circulation were indicated by the ratio of peak systolic velocity with peak diastolic velocity, resistant index and pulsatility index. Determining blood circulation of the umbilical artery, these indices has a highly negative correlation with gestational weeks; Determining blood circulation of the middle cerebral artery, these indices began to decrease with the increasing gestational weeks; Determining blood circulation of the gravida uterus helicine artery, the resistant index and pulsatility index were lower than those before pregnancy. Detecting several indices together can raise the accurateness and reliability in the prediction of perinatal fetus adverse outcomes.更多还原