=====Bypass graft=====
Graft selection in extracranial-intracranial [[bypass surgery]] for cerebral aneurysms has traditionally been based on clinical impression and operator preference. 

Despite a relative reduction in bypass flow over time, hemispheric flows were maintained, indicating that simple native donors can carry sufficient flow for territory demand long term when an intraoperative flow-based algorithm is used for donor selection
((Rustemi O, Amin-Hanjani S, Shakur SF, Du X, Charbel FT. Donor Selection in
Flow Replacement Bypass Surgery for Cerebral Aneurysms: Quantitative Analysis of 
Long-term Native Donor Flow Sufficiency. Neurosurgery. 2015 Oct 27. [Epub ahead
of print] PubMed PMID: 26509645.
))