A controlled study of the peripheral circulation in 47 diabetics has been performed with the aid of thermography. Infrared emission patterns over hands and feet revealed asymmetries and/or deviations of the normal skin temperature distribution in all diabetics. The thermographic findings of the diabetic patients were in most cases distinctive, with an asymmetric decrease in the emission levels over one or more toes or fingers. These thermographic abnormalities are interpreted as reflecting probable vascular disturbances, which are characteristic of diabetes mellitus.
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