Hepatic Segmentation and Intrahepatic Venous Drainage System in the Right Surgical Lobe of the Human Liver, Especially in the Posterior Sector.

我们用解剖的方法描述了197例肝脏右手术叶肝内血管分支的模式。首先，51.7%的病例可通过肝内门静脉分支形态识别右侧后节段。1)将后扇形主干简单地分为节段门静脉分支病毒（P6）和节段门静脉分支VII （P7）主干，根据P6和P7的分布范围，可以很容易地识别出S6和S7。2)虽然没有后分区干，但由于P6和P7形成了一个主干，因此从门静脉分枝模式可以识别出S6和S7。三条肝静脉（RHV， SHV， MHV）通常不能帮助识别该区域的肝节。因此，门静脉和肝静脉系统的不规则结构的不理想组合表明，在30-40%的病例中，右后节段不能在解剖学上得到最终确定。其次，在右爱下区，RHV、SHV和MHV呈互补静脉引流关系。在右肺上区，厚静脉分支被赋予了不同的名称，我们根据它们与右上门静脉分支（P7和P8）、RHV、MHV、shv及其分支的地形关系，系统地将这些分支分为5类“右上根”（RSR）。我们对上区域的形态学检查显示P7和P8的大小同时增加或减少，这表明RSRs在静脉回流中起有限的作用。总的来说，静脉回流似乎并没有汇聚到单一的特定静脉，而是被多个上静脉带走：RHV、MHV、shv和5条RSRs。

We describe the pattern of intrahepatic vessels ramification in the right surgical lobes of 197 livers by the method of dissection. Firstly, the right posterior segments could be identified based on the ramification patterns of the intrahepatic portal veins in 51.7% of the cases as follows.1)The posterior sectorial trunk was simply divided into segmental portal branches VIRUS (P6) and segmental portal branches VII (P7) trunks, S6 and S7 were readily identified based on the territories of P6 and P7, respectively.2) Although the posterior sectorial trunk was absent, both S6 and S7 were identifiable from the portal ramification pattern since either P6 and P7 formed a single trunk. The three hepatic veins (RHV, SHV, MHV) often did not aid the identification of the liver segments in the region. Consequently, the less than ideal combinations of irregular configurations of the portal and hepatic venous systems suggested that the right posterior segments cannot be conclusively identified anatomically in 30-40% of cases. Secondly, on the lower region of the right love, the RHV, SHV and MHV showed complementary venous drainage relationships. In the upper region of the right lobe various names have been given to the thick venous tributaries, we systematically classified these tributaries into 5 types of "right superior radicles" (RSR), according to their topographical relationships with the right superior portal branches (P7 and P8), RHV, MHV, SHVs and their tributaries. Our morphometric examination of the upper region revealed that the sizes of P7 and P8 increased or decreased simultaneously, and suggested that the RSRs played limited roles in venous return. Overall, the venous return did not seem to converge into a single particular vein, but was carried away by multiple superior veins: the RHV, MHV, SHVs and 5 RSRs.