The effect by the structure of vessel branches on patency rate in microvascular anastomosis

本研究旨在明确结扎部位到血管分支的适宜距离，并对微血管吻合中的距离进行评估。由于血管分支周围剥离造成优势血管痉挛，血管分支结扎组的通畅率高于血管分支附近结扎组。吻合口组的通畅率高于血管分支附近结扎组。

This research is to define the desirable distance from ligation site to vessel branches, and to assess in microvascular anastomosis. Because the procedure to dissect around vessel branches make dominant vessel spasm, the patency rate in the group that ligated away from vessel branch is higher than the group that ligated near vessel branch. Also, the patency rate in the flow through anastomosis group is higher than the group that ligated near vessel branch.