title: Intraoperative sonographic assessment of graft patency during extracranial-intracranial bypass.
abstract: Extracranial-intracranial (EC-IC) bypass may be necessary to facilitate treatment of unclippable posterior circulation fusiform aneurysms. Although intraoperative digital subtraction angiography (DSA) allows assessment of graft patency, this technique, because of difficulties inherent in performing selective catheterization and angiography in the operating room, has limitations. Duplex sonography, in contrast, is easily performed, and provides information regarding graft patency and blood flow direction during EC-IC bypass procedures. This latter information proved useful in determining the time of parent artery occlusion after two EC-IC bypass procedures performed for treatment of a fusiform midbasilar artery aneurysm.
authors.affiliation: Department of Neurological Surgery, University of Wisconsin School of Medicine, Madison 53792-3232, USA.
authors.forename: B
authors.initials: B
authors.lastname: Badie
authors.forename: F T
authors.initials: FT
authors.lastname: Lee
authors.forename: M A
authors.initials: MA
authors.lastname: Pozniak
authors.forename: C M
authors.initials: CM
authors.lastname: Strother
mesh_terms: D000328:Adult; D001807:Blood Vessel Prosthesis; D001921:Brain / Q000473:pathology; D002548:Cerebral Revascularization; D006801:Humans; D007432:Intraoperative Period; D018810:Magnetic Resonance Angiography; D008279:Magnetic Resonance Imaging; D008297:Male; D018616:Ultrasonography, Doppler, Duplex; D014654:Vascular Patency