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• W2043969447 startingPage "687" @default.
• W2043969447 abstract "Regional cerebral blood flow (rCBF) and laser-Doppler perfusion were measured in rats after controlled cortical impact injury (CCII), a model of traumatic brain injury. Male Long-Evans rats were anesthetized with isoflurane and surgically prepared with arterial and venous cannulae. CCII was induced after a craniectomy by deforming the right parietal cortex to a depth of 2 mm with a metal cylinder traveling at a velocity of 5.2 m/s. Laser-Doppler perfusion was monitored from the surface of the left frontal cortex. rCBF, using14 C-isopropyliodoamphetamine, and laser-Doppler perfusion were measured in three groups of rats consisting of a sham group (n = 6), a group 30 min after CCII (n = 6), and a group 4 h after CCII (n = 5). CCII was characterized by cortical ischemia (rCBF < 20 mL centered dot 100 g-1 centered dot min-1) surrounding the site of impact. The occipital cortex, a cortical region distant from the impact site, was also ischemic in some, but not all, injured rats. In the 30-min group, the ischemic zone showed very sharp boundaries with cortical areas of hyperperfusion surrounding the ischemic zone. In the 4-h group, the ischemic boundaries were not as sharp and the hyperperfusion surrounding the ischemic zone was no longer present. The caudate-putamen, hippocampus, and thalamus showed significant reductions in rCBF ranging from 50% to 30% of control 30 min and 4 h postinjury, respectively. We conclude that complex changes in rCBF occur shortly after CCII and persist for at least 4 h. During this time several brain regions, especially the cortical areas, may suffer damage due to the ischemia. (Anesth Analg 1995;80:687-95)" @default.
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• W2043969447 date "1995-04-01" @default.
• W2043969447 modified "2023-10-14" @default.
• W2043969447 title "Regional Cerebral Blood Flow After Controlled Cortical Impact Injury in Rats" @default.
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• W2043969447 doi "https://doi.org/10.1097/00000539-199504000-00007" @default.
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