title: Studies on cerebral blood flow and oxygen metabolism in patients with established cerebral infarcts undergoing omental transposition.
abstract: Regional cerebral blood flow, blood volume, fractional oxygen extraction, and oxygen consumption were measured by positron emission tomography in 4 stroke patients prior to and 6 months following omental transposition surgery. Preoperatively, 3 patients showed the typical picture of established infarction with a matched reduction in flow and oxygen metabolism and a normal oxygen extraction fraction in the symptomatic hemisphere. One patient showed a chronically impaired perfusion reserve with a proportionally greater reduction in flow than oxygen metabolism and a compensatory rise in oxygen extraction ratio. No change in the physiological parameters was demonstrated in the postoperative studies.
mesh_terms: D002544:Cerebral Infarction / Q000000981:diagnostic imaging / Q000378:metabolism* / Q000503:physiopathology / Q000601:surgery; D002548:Cerebral Revascularization / Q000379:methods*; D002560:Cerebrovascular Circulation; D005260:Female; D006801:Humans; D008297:Male; D009852:Omentum / Q000637:transplantation*; D010101:Oxygen Consumption; D011184:Postoperative Period; D011446:Prospective Studies; D014055:Tomography, Emission-Computed