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EFFECT OF ANTI-PLATELET DRUGS (PYRIDINE DERIV. AND INDOMETHACIN) ON REGIONAL CEREBRAL BLOOD FLOW AFTER TOTAL CEREBRAL ISCHEMIA IN DOG Hisayuki Tabuse 1 1Department of emergency medicine, Kawasaki Medical School pp.1157-1164
Published Date 1981/11/1
DOI https://doi.org/10.11477/mf.1406204852
  • Abstract
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Sixty-three mongrel dogs were exposed to 8-10 min. of complete cerebral ischemia with Aortic occlusion balloon catheter and followed by 120min. of recirculation. The degree and distribution of post-ischemic reperfusion in 11 different cerebral regions were then assessed using radioactive label-led microspheres (15±3μm). The animals were divided into 3 groups by the administration of drugs as follows: 1) no additional drugs ; 2) Indo-methacin (selective inhibitor of cyclooxygenase) 4mg/kg 5min. after ischemia ; 3) Pyridine deriv. (OKY-1580 Na-salt, selective inhibitor of throm-boxane synthetase) infusion 100γ/kg/min. beginning 5min. after ischemia.

Animals receiving no additional drugs had low cerebral blood flow rates at 120min. after ischemia especially in basal ganglia and cerebral cortex. Animals receiving Indomethacin did not differ significantly from the no additional drug group. The significant enhancement and redistribution of post-ischemic reperfusion at 120min. after ischemia occurred in animals receiving Pyridine deriv. with reversal of the state of poor reperfusion.

These observations implicate an imbalance of prostaglandin pathways in platelets and blood vessel walls in the genesis of impaired post-ischemic reflow and suggest the usefulness of Pyridine deriv. in the treatment of local vasoconstriction of the brain after total cerebral ischemia.


Copyright © 1981, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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