Cerebral Microangiography After Hypocarbia and Hypercarbia
نویسنده
چکیده
Cerebral Microangiography After Hypocarbia and Hypercarbia • Ischemic infarction was obtained in the basal ganglia and internal capsule of the Rhesus monkey by clipping the middle cerebral artery at its origin through a transorbital approach. The postmortem microvasculature was demonstrated using microtized barium (Micropaque) and soft x-ray technology. The effects on this microvasculature induced by antemortem variations in Paco,, in the normal and the acutely infarcted animal were studied. Microangiography was shown to be useful in the study of dynamic vascular changes in the deep structures of the ischemic brain. Additional
منابع مشابه
Cerebral microangiography after hypocarbia and hypercarbia. Demonstration of deep vascular changes produced by Pa CO2 variations in the normal and ischemic brain of the rhesus monkey.
Cerebral Microangiography After Hypocarbia and Hypercarbia • Ischemic infarction was obtained in the basal ganglia and internal capsule of the Rhesus monkey by clipping the middle cerebral artery at its origin through a transorbital approach. The postmortem microvasculature was demonstrated using microtized barium (Micropaque) and soft x-ray technology. The effects on this microvasculature indu...
متن کاملLocal Mechanism of CO2 Action on Cat Pial Arterioles
1. Hoedt-Rasmussen K, Skinhoj E, Paulson O, et al: Regional cerebral blood flow in acute apopiexy. Arch Neurol (Chicago) 17: 271-281, 1967 2. Cannon PJ, Sciacca RR, Brust JCM, et al: Measurement of regional cerebral blood flow with '"Xe and a multiple-crystal scintillation camera. Stroke 5: 371-383, 1974 3. Donley RF, Sundt TM, Anderson RE, et al: Blood flow measurements and the look through ar...
متن کاملLocal cerebral blood flow following transient cerebral ischemia. II. Effect of arterial PCO2 on reperfusion following global ischemia.
Following 5 minutes of global ischemia, local cerebral blood flow (LCBF) was shown to have an initial reactive hyperemia that was followed, within the first hour, by persistent hypoperfusion (Part I). Intracranial pressure (ICP) was never elevated during the period of poor reperfusion. These experiments attempted to reverse the state of subnormal LCBF by inducing hypercarbia or hyocarbia or mai...
متن کاملPulmonary vascular resistance before and after cardiopulmonary bypass. The effect of PaCO2.
To examine whether CPB influences pulmonary vascular sensitivity to CO2, we compared the effect of slight induced hypocarbia and hypercarbia on pulmonary circulation before and after CPB in ten mechanically ventilated patients undergoing CABG. Hypocarbia was produced by increasing tidal volume slightly and hypercarbia was then induced by adding CO2 to the inspired gas mixture. In another ten pa...
متن کاملIntraoperative Secondary Insults During Orthopedic Surgery in Traumatic Brain Injury.
BACKGROUND Secondary insults worsen outcomes after traumatic brain injury (TBI). However, data on intraoperative secondary insults are sparse. The primary aim of this study was to examine the prevalence of intraoperative secondary insults during orthopedic surgery after moderate-severe TBI. We also examined the impact of intraoperative secondary insults on postoperative head computed tomographi...
متن کامل