Brain, blood and rectal temperature during whole body cooling |
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Authors: | J P Kiley F L Eldridge D E Millhorn |
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Abstract: | To determine if rectal temperature is an adequate index of brain temperature during changing thermal conditions, we measured rectal, cerebral cortical, and carotid arterial blood temperatures simultaneously during whole body cooling in adult cats. The mean steady state rectal, brain and carotid arterial temperatures at the onset of cooling were: 39.2 +/- 0.2, 38.5 +/- 0.2, and 38.3 +/- 0.3 degrees C, respectively. Rectal temperature decreased faster than both brain and arterial blood, while only a small temperature difference was observed between brain and arterial blood, brain always exceeding blood. Rectal temperature cannot be considered an adequate index of brain temperature. Carotid arterial temperature is a better estimate of brain temperature. |
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