Cerebral microcirculatory changes during exposure to hypoxia.

P Weinbrecht; I Longmuir; J Knopp; M Mills

doi:10.1007/978-1-4684-7433-6_28

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Cerebral microcirculatory changes during exposure to hypoxia.

P Weinbrecht·I Longmuir·J Knopp·M Mills

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Abstract

Changes in the red blood cell content of the cat cerebral cortical vessels were monitored using reflecting light during a decrease in PIO2. The following observations were made: 1) the capillary bed red blood cell content increased during hypoxia prior to the arteriole response at an arterial oxygen tension of 52.0 mmHg; 2) at arterial oxygen tensions below 52 mmHg the red blood cell content increased in all vessels simultaneously; 3) as the PIO2 decreased, the increase in red blood cell content occurred earlier in all vessels. Capillaries, therefore, can respond to hypoxia independently of the arteriole in cat cerebral cortical tissue.

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Animals Arterioles Capillaries Cats Cerebral Cortex Cerebrovascular Circulation Erythrocyte Count Female Hypoxia Oxygen Journal Article Research Support, U.S. Gov't, P.H.S.

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P Weinbrecht, I Longmuir, J Knopp, M Mills. 1987. Cerebral microcirculatory changes during exposure to hypoxia.. https://doi.org/10.1007/978-1-4684-7433-6_28

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