The segment of the superior mesenteric vein between the two confluences of the gastrocolic vein and ths ileocolicvein is called the "surgical trunk".
位于胃结肠静脉和回结肠静脉注入下腔静脉处之间的一段肠系膜上静脉被命名为“外科干”。
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Conclusion: the lower part of the surgical trunk of the superior mesenteric vein is the abouchement of the ileocolicvein and the upper part was the nearest right abouchement from the ileocolicvein.