双胎输血综合征是指双胎时由于胎盘上血管吻合,使两个胎儿间血流不均衡,一个胎儿(供血儿)发生贫血,另一胎儿(受血儿)导致多血症,因而在发育上出现明显的差异。本病严重影响两个胎儿的预后。一、病因及病理:本病只发生在一卵性双胎病例,由于血管吻合使血液供给偏于一方时始出现。单绒毛膜胎盘时,几乎所有病例均有血管吻合,而发生不同程度的血液转输现象。血管吻合有动脉-动脉、静脉-静脉、和动脉-静脉等三类,当动静脉吻合时,动脉侧胎儿则为供血者,静脉侧胎儿为受血者,血液流向一方。于是,供血儿发生贫血、发育不良、因尿量减少羊水也因之减少,有及因失 Twin blood transfusion syndrome refers to the twins due to placental vascular anastomosis, so that two blood flow between the fetus is not balanced, one fetus (for blood) anemia, the other fetus (by blood) lead to hyperlipidemia, and therefore in Significant differences in development. The disease seriously affects the prognosis of two fetuses. First, the etiology and pathology: The disease occurs only in an egg twin cases, due to vascular anastomosis when the blood supply to one side began to appear. Single chorionic placenta, almost all cases of vascular anastomosis, and the occurrence of varying degrees of blood transfusion phenomenon. Vascular anastomosis artery - artery, vein - vein, and artery - vein and other three categories, when the arteriovenous anastomosis, the arterial side of the fetus is the donor, the venous side of the fetus for the recipient, the blood flow to one side. As a result, the blood supply anemia, dysplasia, due to decreased urine output of amniotic fluid, and because of loss