目的　为肠系膜上静脉胰后干切除及血管重建提供形态学基础。  方法　选取男、女性标本各50例，切除胰十二指肠后，测量肠系膜上静脉胰后干的长度和向上纵向折叠长度，以推算肿瘤手术时可切除的静脉的最大长度。  结果　肠系膜上静脉胰后干长度男、女性分别为（3.5±0.8）cm和（3.3±0.6）　cm；长度大于3.0 cm的分别为80%（40例）和76.0%（38例）。切除胰十二指肠后，胰腺钩突以下肠系膜上静脉向上纵向折叠长度为4.0~5.1cm。  结论　胰头肿瘤合并受浸润胰后干切除后，血管重建是可行的。

Objective　To provide anatomic basis for the resection of post-pancreas trunk of superior mesenteric vein (SMV) and the sequencing vessel anastomosis during the surgical treatment of pancreas uncinate process carcinoma.　Methods　For presumpting the resectable greatest length of the veins during the surgical process of pancreas uncinate process carcinomam, the abdominal specimens (50 male, and 50 female) were used in this study. The length of the SMV behind the uncinate process, and the longitudinal flexure of the SMV were measured after removing the pancreas and duodenum.　Results　The length of the post-pancreas trunk of SMV was about（3.5±0.8）cm and（3.3±0.6）cm for male and female respectively. For 40 male specimens (80%) and 38 female specimens (76%), the length of the post-pancreas trunk exceeded 3.0cm, respectively. The average length of longitudinal flexure of the SMV ranged from 4.0cm to 5.1cm after resecting the pancreas and duodenum.　Conclusions　This study provides a clinical anatomic evidence for the direct end-to-end anastomosis of SMV during the duodenopancreatectomy.