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EXPERIMENTAL MODEL PRODUCING GLOBAL BRAIN ISCHEMIA BY CLAMPING THE AORTA IN DOGS Takayuki Matsumae 1 , Kazuhiko Iijima 1 , Toshihide Yonezawa 1 1Department of Anesthesiology, School of Medicine, Chiba University pp.349-355
Published Date 1984/4/1
DOI https://doi.org/10.11477/mf.1406205298

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  • Abstract
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Canine cerebral blood flow is supplied not only through carotid and vertebral arteries, but also through rich network of collaterals. Therefore, it is said that total body arrest is requested to as-sure the global brain ischemia. The global ische-mic models, reported previously, were by the simultaneous occlusion of aorta and vena cava. In our model, however, the gloval cerebral ischemia was producted by clamping only the ascending aorta.

Cardiovascular changes such as increases in left ventricular and pulmonary arterial pressure, and decrease in left ventricular dp/dt followed after ceasing of ascending aortic blood stream.

The heart continued to beat during 60 minutes of the clamping. Despite of increased central ve-nous pressure, sagittal sinus pressure and intra-cranial pressure remained unchanged during the aorta clamping. Ten-minutes of total cerebral ische-mia was produced in 46 dogs and successful studies on cerebral and systemic variables were carried out in 68% of them.

The method of clamping the aorta without oc-clusion of vena cava seems to be unsuitable for long term survival study because of severe loading of lung circulation. However, we conclude that this simple model is of great use for short term experiment on global brain ischemia.


Copyright © 1984, 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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