title: Flow-assisted surgical technique in cerebrovascular surgery.
abstract: BACKGROUND
  Cerebrovascular surgery is a technically challenging subspecialty of neurosurgery. A flow-based approach to cerebrovascular surgery can help to optimize neurosurgical interventions.
  
  
  METHODS
  Direct intraoperative flow measurements can be made using a quantitative ultrasonic microvascular flow probe. In this article, we review the applications and utility of the FAST in aneurysm and EC-IC bypass surgery.
  
  
  RESULTS
  In aneurysm surgery, flow measurements provide a quick and repeatable method to assess vessel patency and avoid complications related to vascular compromise. In bypass for flow augmentation in the setting of ischemia, flow measurements assess bypass patency and can assess the physiologic success of the bypass strategy. In bypass for flow replacement in the setting of planned vessel sacrifice, flow measurements can measure the flow deficit resulting from the vessel occlusion, assess the adequacy of in situ donor vessels, and confirm the ultimate adequacy of the bypass at the completion of surgery.
  
  
  CONCLUSIONS
  The FAST strategy provides a useful approach to optimizing decision making and outcomes during cerebrovascular surgery.
authors.affiliation: Department of Neurosurgery, University of Illinois at Chicago, Chicago, IL, USA. hanjani@uci.edu
authors.forename: Sepideh
authors.initials: S
authors.lastname: Amin-Hanjani
authors.forename: Fady T
authors.initials: FT
authors.lastname: Charbel
mesh_terms: D002545:Brain Ischemia / Q000503:physiopathology / Q000517:prevention & control; D002536:Cerebral Arteries / Q000000981:diagnostic imaging / Q000601:surgery / Q000648:ultrastructure; D002548:Cerebral Revascularization / Q000295:instrumentation / Q000379:methods / Q000592:standards; D002560:Cerebrovascular Circulation / Q000502:physiology; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery*; D008833:Microcirculation / Q000000981:diagnostic imaging / Q000502:physiology; D008991:Monitoring, Physiologic / Q000295:instrumentation / Q000379:methods; D019635:Neurosurgical Procedures / Q000295:instrumentation / Q000379:methods* / Q000592:standards; D014463:Ultrasonography / Q000295:instrumentation / Q000379:methods*; D014656:Vascular Surgical Procedures / Q000295:instrumentation / Q000379:methods*