| Objective:Observation of the morphological characteristics and branch distribution ofPosterior branch of right portal veins of the liver,. This study will provide detailedmorphological information for the precise sygery of liver transplantation and hepaticsegment resection.Methods:52cases of10%formalin-fixed adult livers, which have no occupyinglesions, were observed in present study. the hepatic portal vein were revealed byremoving the liver parenchyma from the diaphragmatic surface. And the right branchof the hepatic portal trunk were exposed. the number of branches of right portal vein,walking, and patterns of branches were observed. Measurement of data of the posteriorbranch of the hepatic Posterior right portal vein trunk and its branches were conductedand analysis statistically.Results:1The posterior branch of right portal vein branch form is divided in to fourkinds.(1) The arcuate mode Group(15/52cases28.8%)Go according to the backbone of the venous arch-shaped form,(A-group)andWith or without the P6-0branch (B-group)，Venous arch were divided into groups, A1(10/15) venous arch-trunk out of shape smoothing groups, A2(5/15) the group of thebackbone of the venous arch twists and turns in the bifurcation point. B1(4/15) TheP6-0branch group, B2(11/15) None of the P6-0branch group.(2) Two branch group (24/52cases42.2%), we summarized four differentbranching morphogenesis Group：Group A (11/24)45.8%: Ⅵ segment of the trunk and Ⅶ segment of the trunk approximately the same diameter close to the ideal form of a branch group.Group B29.2%(7/24): P6-0-branch group, if there is the indication of segment Ⅵother branches.Group C12.5%(3/24): Ⅵ segment, Ⅶ paragraph trunk directly from the bottomof the main portal vein.Group D12.5%(3/24): the part of the branch of the Ⅶ segment was walkingdown the shape to segment Ⅵ.B, C, D, mutated form of two-branch type, attributed to the variation groupanalysis.(3)Three-branch group (11/52cases21.5%), this group is characterized by abranch to supply the segment Ⅵ issued in the wedge-shaped area between the portalvein of segment Ⅵsegment Ⅶ, Ⅶ segment of the middle region or segment Ⅵthe Ⅶsegment part sub. We divided into two groups according to the branchingmorphogenesis：Group A (6/1154.5%): variation of group。Group B (5/1145.5%): variation group.(4) Variation group (22/52cases42.3%), all relative to the theory, normal form ofthe abnormal morphology and other forms of variation are summarized to the variationof group.2Hepatic vein in the right posterior section of the variability(17/5232.7%) specimens, the right hepatic vein is a branch to take shape theboundaries of areas Ⅵ and Ⅶ segment to provide a basis for segmentation.(35/5267.3%) Ⅵ segment, segment Ⅶ branch of the hepatic vein。(8/5215.4%) dysplasia ofthe right hepatic vein backflow can not be all of segment Ⅵ.(1/521.92%), developmentof the right hepatic vein is extremely bad, can only backflow part of Ⅶ segment, and theliver meridians extremely developed, while backflow Ⅴ segment through the entiresegment Ⅵ Ⅴ section of the lower edge of backflow.The study also found five cases of liver short vein (of SHV), venous arch group1cases, two branches of the group of three cases, the special case of short hepatic veins.Branch of the case of short hepatic veins in the two branches of the group to walk theline Ⅵ segment, Ⅶ segment boundaries area, as the segment Ⅵ typical sign of theⅦ segment boundariesResults: This study found that there was a large variation between the right portalvein branch and the Right posterior segment of the hepatic vein. Liver resection and living donor liver transplantation needs the branch form of preoperative portal vein andhepatic vein. branches of the situation accurate understanding. The study has a guidingrole in liver surgery and interventional treatment... |
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