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1973年首次应用胎儿镜采血,但流早产率高,目前一般是在超声波引导下采血。该方法的技术要点是通过超声波断层法充分描出脐静脉,再用针穿刺。其目的是:(1) 通过血液进行快速染色体分析,对遗传病、胎儿感染症等作出生前诊断;(2) 依据母体血小板减少症和 Rh 不合妊娠等免疫学疾病对胎儿的影响或发育迟缓胎儿的血液所见等掌握胎儿的状态;(3) 胎儿输血后的状态及经母体治疗胎儿时药物浓度的测定等胎儿疗效的判断;(4) 搞清药物的胎盘通透性等出生前的药理动态等。
Fetal lens blood was first applied in 1973, but the rate of flow premature delivery was high, and blood is currently being drawn under ultrasound guidance. The technical point of the method is that the umbilical vein is fully delineated by the ultrasonic tomography, and then the needle is punctured. Its purpose is to: (1) make rapid prenatal diagnosis of genetic disease, fetal infection and the like by rapid chromosomal analysis of blood; (2) influence or retardation of the fetus on the fetus by an immunological disease such as maternal thrombocytopenia and Rh unmentionable pregnancy (3) the status of the fetus after transfusion and determination of the fetus by the maternal treatment of fetal drug concentration determination; (4) to clarify the drug’s placental permeability before birth, such as pharmacology Dynamic and so on.