title: The use of ultrasound for postoperative monitoring of cerebral bypass grafts: A technical report.
abstract: Duplex ultrasound and transcranial Doppler are valuable tools for post-operative monitoring of extracranial-intracranial cerebral bypass grafts. Here we describe our technique for the evaluation of both high-flow and low-flow cerebral bypass grafts over a nine year period. 186 bypass grafts were studied daily during the inpatient period between Jan 2005 and Dec 2014 after surgery for various cerebrovascular pathologies. There was a technical success rate of 97%. Duplex ultrasonographic flow measurements had excellent interobserver reliability with an intraclass correlation coefficient (ICC) of 0.89 (p=0.009). Technical nuances are highlighted and a brief discussion of pathology is undertaken.
authors.affiliation: Department of Neurological Surgery, University of Washington School of Medicine, 325 9th Ave, Seattle, WA 98104, USA. Electronic address: rymorton@gmail.com.
authors.forename: Ryan P
authors.initials: RP
authors.lastname: Morton
authors.affiliation: Department of Neurological Surgery, University of Washington School of Medicine, 325 9th Ave, Seattle, WA 98104, USA.
authors.forename: Isaac Joshua
authors.initials: IJ
authors.lastname: Abecassis
authors.affiliation: Department of Neurological Surgery, University of Washington School of Medicine, 325 9th Ave, Seattle, WA 98104, USA.
authors.forename: Anne E
authors.initials: AE
authors.lastname: Moore
authors.affiliation: Department of Neurological Surgery, University of Washington School of Medicine, 325 9th Ave, Seattle, WA 98104, USA.
authors.forename: Cory M
authors.initials: CM
authors.lastname: Kelly
authors.affiliation: Department of Neurological Surgery, University of Washington School of Medicine, 325 9th Ave, Seattle, WA 98104, USA; Department of Radiology, University of Washington School of Medicine, 325 9th Ave, Seattle, WA 98104, USA; Department of Mechanical Engineering, University of Washington, Stevens Way, Box 352600, Seattle, WA 98195, USA.
authors.forename: Michael R
authors.initials: MR
authors.lastname: Levitt
authors.affiliation: Department of Neurological Surgery, University of Washington School of Medicine, 325 9th Ave, Seattle, WA 98104, USA; Department of Radiology, University of Washington School of Medicine, 325 9th Ave, Seattle, WA 98104, USA.
authors.forename: Louis J
authors.initials: LJ
authors.lastname: Kim
authors.affiliation: Department of Neurological Surgery, University of Washington School of Medicine, 325 9th Ave, Seattle, WA 98104, USA.
authors.forename: Laligam N
authors.initials: LN
authors.lastname: Sekhar
mesh_terms: D002548:Cerebral Revascularization / Q000009:adverse effects / Q000379:methods*; D002560:Cerebrovascular Circulation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic; D011183:Postoperative Complications / Q000000981:diagnostic imaging*; D019737:Transplants / Q000000981:diagnostic imaging*; D017585:Ultrasonography, Doppler, Transcranial / Q000379:methods*
keywords: Duplex; EC-IC bypass; Flow; Transcranial Doppler; Ultrasound; Vasospasm