title: Cerebral hemodynamics and metabolism of severe diffuse brain injury measured by PET.
abstract: Cerebral hemodynamics and metabolism in three patients with severe diffuse brain injury were measured 10 days after onset using PET. In this study, regional cerebral blood flow (rCBF), oxygen extraction fraction (rOEF), cerebral blood volume (rCBV), cerebral metabolic rate for oxygen (rCMRO2), cerebral metabolic rate for glucose (rCMRglc) and cerebral metabolic ratio (rCMRO2/rCMRglc) were measured. The Glasgow Coma Scale scores on admission were 4, 5 and 5, respectively, and CT on admission showed typical findings of diffuse brain injury. As a result, PET revealed misery perfusion and hyperglycolysis in Patient 1 and matching low perfusion and low glucose metabolism in Patients 2 and 3. Although Patient 1 died, Patients 2 and 3 had good recoveries. We speculate that a long-lasting anaerobic state, indicated by a high OEF value and low metabolic ratio, is an important undesirable factor related to the outcome.
authors.affiliation: Department of Neurosurgery, Kyoto Prefectural University of Medicine, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Yamaki
authors.forename: Y
authors.initials: Y
authors.lastname: Imahori
authors.forename: Y
authors.initials: Y
authors.lastname: Ohmori
authors.forename: E
authors.initials: E
authors.lastname: Yoshino
authors.forename: T
authors.initials: T
authors.lastname: Hohri
authors.forename: T
authors.initials: T
authors.lastname: Ebisu
authors.forename: S
authors.initials: S
authors.lastname: Ueda
mesh_terms: D000293:Adolescent; D000328:Adult; D001921:Brain / Q000000981:diagnostic imaging / Q000378:metabolism*; D001930:Brain Injuries / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D002560:Cerebrovascular Circulation / Q000502:physiology*; D003128:Coma / Q000000981:diagnostic imaging / Q000503:physiopathology; D003847:Deoxyglucose / Q000031:analogs & derivatives; D005260:Female; D005462:Fluorine Radioisotopes; D019788:Fluorodeoxyglucose F18; D005947:Glucose / Q000378:metabolism; D006019:Glycolysis; D006801:Humans; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology; D010104:Oxygen Radioisotopes; D014055:Tomography, Emission-Computed
chemical_list: D005462:Fluorine Radioisotopes; D010104:Oxygen Radioisotopes; D019788:Fluorodeoxyglucose F18; D003847:Deoxyglucose; D005947:Glucose