title: Measurement of Blood Flow in an Intracranial Artery Bypass From the Internal Maxillary Artery by Intraoperative Duplex Sonography.
abstract: This study explored the hemodynamic characteristics of a subcranial-intracranial bypass from the internal maxillary artery by measuring blood flow on intraoperative duplex sonography. The hemodynamic parameters of the internal maxillary artery (n = 20), radial artery (n = 20), internal maxillary artery-middle cerebral artery bypass (n = 42), and internal maxillary artery-posterior cerebral artery bypass (n = 9) were measured by intraoperative duplex sonography. There was no significant difference in the internal diameters of the internal maxillary and radial arteries (mean ± SD, 2.51 ± 0.34 versus 2.56 ± 0.22 mm; P = .648). The mean radial artery graft length for subcranial-intracranial bypasses was 88.5 ± 12.78 mm (95% confidence interval [CI], 80.8-90.2 mm). Internal maxillary artery-middle cerebral artery bypasses required a shorter radial artery graft than internal maxillary artery-posterior cerebral artery bypasses (77.8 ± 2.47 versus 104.8 ± 4.77 mm; P = .001). The mean flow volumes were 85.3 ± 18.5 mL/min (95% CI, 76.6-93.9 mL/min) for the internal maxillary artery, 72.6 ± 26.4 mL/min (95% CI, 64.3-80.9 mL/min) for internal maxillary artery-middle cerebral artery bypasses, and 45.4 ± 6.7 mL/min (95% CI, 40.7-50.0 mL/min) for internal maxillary artery-posterior cerebral artery bypasses. All grafts were opened after the success of the salvage procedures had been established, and the early patency rates (1 month after the operation) were 95% for internal maxillary artery-middle cerebral artery bypasses and 100% the internal maxillary artery-posterior cerebral artery bypasses. Measurement of blood flow by intraoperative sonography can be helpful in decision making and predicting graft patency and success after neurosurgical bypass procedures.
authors.affiliation: Department of Neurosurgery, Fu Xing Hospital, Capital Medical University, Beijing, China.
authors.forename: Zaitao
authors.initials: Z
authors.lastname: Yu
authors.affiliation: Department of Neurosurgery, Fu Xing Hospital, Capital Medical University, Beijing, China.|Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China.
authors.forename: Xiang'en
authors.initials: X
authors.lastname: Shi
authors.affiliation: Department of Neurosurgery, Peoples University for Medical and Health Sciences, Nawabshah, Sindh, Pakistan.
authors.forename: Shams Raza
authors.initials: SR
authors.lastname: Brohi
authors.affiliation: Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China.
authors.forename: Hai
authors.initials: H
authors.lastname: Qian
authors.affiliation: Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China.
authors.forename: Fangjun
authors.initials: F
authors.lastname: Liu
authors.affiliation: Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
mesh_terms: D000328:Adult; D000368:Aged; D002536:Cerebral Arteries / Q000000981:diagnostic imaging / Q000502:physiology / Q000601:surgery*; D002560:Cerebrovascular Circulation / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008438:Maxillary Artery / Q000000981:diagnostic imaging / Q000502:physiology / Q000601:surgery*; D008875:Middle Aged; D016343:Monitoring, Intraoperative / Q000379:methods*; D019635:Neurosurgical Procedures / Q000379:methods*; D018616:Ultrasonography, Doppler, Duplex / Q000379:methods*; D055815:Young Adult
keywords: extracranial-intracranial bypass; hemodynamics; internal maxillary artery; intraoperative duplex sonography; subcranial-intracranial bypass; vascular ultrasound