多数肠系膜上静脉、下腔静脉H型搭桥分流术的失败可归因于肠系膜上静脉的管径小。作者所在的霍普金斯医院在开展上述手术的初期,注意到肠系膜上静脉常在相当十二指肠第三部水平分支,因而该处通常并非其管径之最大部分,如于十二指肠第三部和胰腺钩状突之顶部,将肠系膜上静脉向近心端游离至其穿入胰腺颈部后方处,即可避开其所有的分支,该处静脉管腔之直径最大。作者利用此种解剖上的特点,改良了肠系膜上静脉、下腔静脉H型搭桥分流的手术方法。将移植血管的一端与下腔静脉作端侧吻合后,另 Most of the superior mesenteric vein, inferior vena cava bypass bypass failure can be attributed to the small diameter of the superior mesenteric vein. At the beginning of the procedure, Hopkins Hospital, the author, noticed that the superior mesenteric vein usually branches at the level of the third part of the duodenum, so the area is usually not the largest part of its diameter, The third part of the intestine and the top of the pancreas crooked process, freeing the superior mesenteric vein proximally to its posterior part of the neck of the pancreas to avoid all its branches, where the venous lumen has the largest diameter. The authors use this anatomical feature to improve the superior mesenteric vein, inferior vena cava bypass bypass surgery method. One end of the transplanted blood vessel will be anastomosed to the inferior vena cava and the other