Vascular reconstruction of intracranial lesions is sometimes required during various operations. A few examples are: A3-A3 side-to-side anastomosis for anterior communicating aneurysm in order to secure the blood flow to the distal anterior cerebral artery, STA-radial artery graft-A3 hemi-bonnet bypass for bilateral injury of the anterior cerebral artery, and direct stitching for aneurysmal neck laceration, etc. In this paper we describe the various techniques of vascular reconstruction for intracranial lesions and tumors. Some special microsurgical instruments, such as a micro-needle folder for stitching in a deep field, should be sterilized individually, and be ready for use at any time because injury to vessels in a deep operative field occurs suddenly. If the injured vessels are reconstructed quickly and completely, the neurological deficits after surgery can be limited and at times even prevented. Therefore veins or arteries that are or have been damaged should be reconstructed as much as possible.
