[Combined Bypass and Cerebral Aneurysm Surgery:How to Choose and Practice?]

The treatment for cerebral aneurysms has been changing along with the advancements in endovascular treatment. In particular, the induction of a flow-diverter stent can treat even cavernous portion aneurysms, which have been difficult to treat without parent artery occlusion. The definite advantages of the open surgery are low recurrence rates, high angiographic outcome, and bypass. Herein, we describe the bypass method for treating cerebral aneurysms. The purpose of the bypass, difference between high-flow and low-flow bypasses, how to select the donor artery, and variation of bypass technique are described.