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Journal of Korean Neurosurgical Society 1993;22(8): 877-883.
The Effect of Halothane-induced Acidosis on Focal Cerebral Ischemia in Rat.
Ki Soo Han, Ki Chan Lee, Jeong Wha Chu, Hoon Kap Lee
Department of Neurosurgery, College of Medicine, Korea University, Seoul, Korea.
The current study was performed to investigate the influence of acidosis on focal cerebral ischemia in view of morphometric assay and neuropathological examination. The acidosis was induced by increment of halothane concentration and by decreasing respiratory rate. The mean pH were 7.423+/-0.012 in control group and 7.184+/-0.038 in acidosis group. Twenty-four hours after MCA occlusion(MCAO), neutral red staining and perfusion fixation was performed. The ischemic area was measured and morphometric analysis was undertaken. In acidosis group, the infarct area was 25.23+/-4.78% of the total cerebral area;in control group, the infarct area was 27.69+/-4.05%. The histopathological findings were examined under light microscopy, in which the field scanning was carried out from the midline by 0.5mm interval at cortical and basal ganglia levels. These results indicated that although there was no satistically significant difference in infarct area between acidosis and control group, increased acidosis aggravated the extent of histopathologic ischemic neuronal damage.
Key Words: Acidosis; Focal cerebral ischemia; Morphometric assay histopathologic examination
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