胎儿脐静脉分支的解剖学观测

Anatomiccal observation on umbilical vein branches in the fetal

目的观测胎儿脐静脉的分支，探讨脐静脉血入肝及经静脉导管的流量。方法选择62例经福尔马林固定的正常胎儿肝脏，解剖显露脐静脉各分支，洲其压扁管径，并换算成各管腔的截面积；记录脐静脉各肝叶分支数及分支类型。结果胎儿脐静脉入肝分支的截面积和大于静脉导管的截面积，两者的差异有高度显著性（P＜0．001）。入肝在叶分支之截面积和占整个入肝分支截面积的69％。入肝左叶、方叶和尾状叶分支，数的分别为3支、3支和1．3支。结论胎儿脐静脉血大部分经肝脏至下腔静脉，只有一小部分经静脉导管。经肝脏的脐静脉血有2／3以上经肝左叶。

To explore the umbilical vein branches of the fetal and the quantity of blood passing through the liver and the ductus venosus. Method Sixty two normal fetal livers were chosen after being fixed with formalin. The branches of umbilical vein were anatomized, observed and measured.Results There was a significant difference of the total cross section area between the umbilical vein branches pass through the liver and the ductus venosus (P<0. 001). The sectional area passing through the liver conclusion was larger than that of ductus venosus.Conclusion In the fetal, the great majority of umbilical blood passes through the liver to in ferior vena cava and only small part flows into the ductus venosus. There is over two - thirds umbilical vein blood passing through the 1iver to left lobe.