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连续观测１００例正常成人的门静脉ＣＴ测量值。门静脉直径平均（１３４７±２３２）ｍｍ；门静脉分叉部中心９２％在Ｔ１１Ｔ１２水平。门静脉高压组门静脉直径平均（１７３４±２５９）ｍｍ，明显大于正常组（Ｐ＜０．００１）；其分支短径也明显大于正常组（Ｐ＜０．００１）。门静脉分叉部中心９４％在Ｔ１０Ｔ１１水平。门静脉及其分支短径的ＣＴ测量值是判断门静脉是否增粗的可靠指标；门静脉的ＣＴ测量可为ＴＩＰＳ术前定位提供解剖标志。
Continuous observation of 100 cases of normal adult portal vein CT measurements. Portal vein diameter average (13 47 ± 2 32) mm; portal vein bifurcation center 92% at T11 T12 level. The mean diameter of portal vein in portal hypertension was (1734 ± 259) mm, which was significantly larger than that in normal group (P <0.001). The short diameter of branch was also significantly higher than that in normal group (P <0.001). 94% of portal vein bifurcation center in the level of T10 T11. The measurement of the short diameter of the portal vein and its branches is a reliable indicator of whether the portal vein is thickened. CT measurements of the portal vein provide an anatomical landmark for the preoperative positioning of the TIPS.