The Skin Temperature of an Extremity as a Measure of Its Blood Flow

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Abstract
Comparison of finger blood flow as detd. by plethysmographic method of Goetz and the finger skin temp. indicates that skin temp. varies directly with blood flow only when the part of the body under consideration loses heat at a rate greater than 240 Cal./hr./sq. meter. Thus skin temp. changes can be used as a measure of blood flow changes only when there exists a marked temp. gradient between the skin and the ambient air.