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June 1931

THE EFFECT OF SPINAL ANESTHESIA ON ARTERIAL TONE

Author Affiliations

NASHVILLE, TENN.
From the Departments of Gynecology and Medicine of Vanderbilt University.

Arch Surg. 1931;22(6):1040-1044. doi:10.1001/archsurg.1931.01160060168011
Abstract

In a previous study1 it was shown that the cardiac output in dogs under spinal anesthesia remained at a nearly normal level unless a marked diminution in blood pressure took place. The decrease in blood pressure came first and was usually of greater degree than the later decrease in the output of the heart. This sequence of events is just the opposite of that found in experimental traumatic shock and experimental hemorrhage.2 It was believed that a further comparison of these states might throw light on the nature of the different types of shock. These subjects have received a great deal of study in the past fifteen years, but, so far as one can judge from the literature, many of our concepts as to their exact nature are vague and incomplete.

METHOD  Dogs were used. They received barbital (0.3 Gm. per kilogram) intravenously from one to two hours

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