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死胎是指妊娠大于23+6周、无生命迹象的胎儿,是围产儿死亡的主要原因之一,产前有效预测死胎,对降低围产儿死亡率具有重大意义。利用彩色多普勒超声监测不同孕期母体子宫动脉血流参数,特别是妊娠中期子宫动脉搏动指数(PI)对与子痫前期、胎盘早剥、小于胎龄儿(SGA)相关的死胎预测有重要意义;监测胎儿各项多普勒血流参数,如脐动脉、大脑中动脉、静脉导管、腹内脐静脉等,能够反映胎儿宫内缺氧状况,提高胎儿窘迫的诊断率;联合监测母体及胎儿各项血流参数,全面评估胎儿宫内缺氧程度并及时干预,可避免死胎的发生。
A stillbirth is one of the major causes of perinatal death in a fetus of more than 23 + 6 weeks of gestation, with no signs of life. Prenatal effective prediction of stillbirth is of great importance for reducing perinatal mortality. The use of color Doppler ultrasound to monitor maternal arterial blood flow parameters during different gestations, especially the mid-second trimester uterine artery pulse index (PI), is important for the prediction of stillbirth associated with preeclampsia, placental abruption and small gestational age (SGA) Significance; monitoring fetus Doppler blood flow parameters, such as umbilical artery, middle cerebral artery, intravenous catheter, intra-abdominal umbilical vein, etc., can reflect the fetal hypoxia status and improve the diagnostic rate of fetal distress; joint monitoring of the mother and Fetal blood flow parameters, a comprehensive assessment of fetal hypoxia and prompt intervention to prevent the occurrence of stillbirth.