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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。
Objective To observe the branch of fetal umbilical vein to explore the umbilical vein into the liver and intravenous catheter flow. Methods Sixty-two normal fetal livers fixed with formalin were dissected to reveal the branches of the umbilical vein. The diameter of the umbilical vein was squashed and converted into the cross-sectional area of each lumen. The number of branches and the types of branches in the umbilical vein . Results Fetal umbilical vein into the hepatic branch of the cross-sectional area and larger than the cross-sectional area of the venous catheter, the difference was highly significant (P <0.001). The cross-sectional area of the hepatic branch in the leaf and 69% of the cross-sectional area of the entire hepatic branch. Liver left lobe, square leaf and caudate lobe branch, the number of 3, 3 and 1.3. Conclusion Most of fetal umbilical cord blood to the inferior vena cava through the liver, only a small part of the intravenous catheter. The umbilical cord blood by the liver more than 2/3 of the left hepatic lobe.