"High tie" (HT) and "low tie" (LT) of the inferior mesenteric artery (IMA) are two strategies in colorectal cancer surgery. HT describes ligation of the root of the IMA resulting in a more extended lymphadenectomy due to apical lymph node dissection. Apical lymph node metastasis is associated with a poor prognosis [1]. LT describes ligation of the IMA distal to the left colic artery (LCA) preserving this branch’s blood supply to the anastomosis.

中文翻译：

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腹腔镜 D3 淋巴结清扫与左结肠动脉和乙状结肠动脉保留直肠癌 - 视频小插曲

肠系膜下动脉（IMA）的“高位”（HT）和“低位”（LT）是结直肠癌手术中的两种策略。HT 描述了 IMA 根部的结扎，由于根尖淋巴结清扫，导致更大范围的淋巴结切除术。根尖淋巴结转移与预后不良有关[1]。LT 描述了左结肠动脉 (LCA) 远端 IMA 的结扎，以保留该分支对吻合口的血液供应。