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February 1935


Author Affiliations

From the Medical Department of the Hebrew Orphan Asylum, New York.

Am J Dis Child. 1935;49(2):361-366. doi:10.1001/archpedi.1935.01970020076007

The circulatory system of the normal person provides the body tissues with an adequate supply of oxygenated blood. Under basal conditions the rate at which blood flows to the points of utilization is obviously a determining factor in the adequacy of this supply. It was recognized early that a measurement of the velocity of blood flow would give valuable information as to the efficiency of the circulatory system. The speed of the blood flow is not the same in different parts of the circulatory system because of the differences in gravity and the variations in the size of the capillary bed (there is a marked increase peripheralward). Nevertheless, if the velocity is determined between any two points in the body, this value can be established as a standard. Though not an absolute representation of the rate of blood movement throughout the circulatory system, determinations of the rate between similar points

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