AN EXPERIMENTAL STUDY OF THE RESISTANCE TO COMPRESSION OF THE ARTERIAL WALL

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Abstract
The object of this study was to determine whether the resistance to compression of the arterial wall introduces an error of any importance in the clinical measurement of systolic blood-pressure by methods employing circular compression of the arm. PREVIOUS STUDIES AND PRESENT STATUS OF THE QUESTION Very few studies of this problem have been made, and none of these can stand criticism. Von Basch1 measured crudely the pressure necessary to close the empty radial artery. He found that this was 1 mm. for normal, and not much above 5 mm. for sclerotic vessels. Martin,2 in a few experiments on the normal carotids of man, horse, and dog, found that a pressure of 2 mm. was sufficient to collapse the arterial wall; in arteries from an advanced case of arteriosclerosis only 7 mm. were required. No subsequent direct experiments were made, until those in 1908, by Herringham and Womack,

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