Plethysmographic Studies of the Blood Flow Through Normal Hands

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Abstract
It is demonstrated how the combined use of the blood flow at rest and after graded circulatory arrest offers a basis for classification of the hand circulation. At 32[degree]C of local temperature, the vasospastic hand is characterized by a low resting flow and a high peak flow and repayment of the hyperemic flow. The opposite picture is typical in hands with advanced structural disease of the arteries. The use of the hyperemic curve in the calculations is discussed. Data is presented concerning the spontaneous variation of the hand circulation during a single experiment as well as over a period of a couple of weeks.