TITLE

PLETHYSMOGRAPHIC STUDIES OF THE BLOOD FLOW THROUGH NORMAL HANDS

AUTHOR(S)
Hillestad, Leif K.
PUB. DATE
April 1962
SOURCE
Angiology;Apr1962, Vol. 13 Issue 4, p161
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
An experimental study of the normal hand flow by means of plethysmography has been done, and a system founded for distinguishing between normal and pathologic hand blood flow. The great range of normal resting hand flow make this method unsuitable for separating normal from disordered hand blood flow. Introduction of the reactive hyperemia flow following graded circulatory arrest made such a distinction possible. Furthermore, it became possible to distinguish between vasospastic and obliterative arterial disease of the hand. The hyperemia flow curve and its use are discussed. It is demonstrated that the peak flow alone may be an unreliable representative for the hyperemia flow. For a correct assessment the total increases of flow should be incorporated in the calculations. In this report the hyperemia flow was expressed by the peak flow, the area and the repayment. Their different behavior by direct heating is shown. A collecting pressure of 50 or 60 mm Hg gave the best volume increase and did not interfere with the arterial inflow immediately after release of the circulatory arrest. In sequences of equal periods of circulatory arrest a small decrease of hyperemia flows occurred, contrary to what has earlier been found. The methodologic variability of hand plethysmography has been examined during single experiments and in the course of some weeks. The variation found made plethysmography acceptable for clinical research. The variation was less with the subjects seated than supine.
ACCESSION #
16370528

 

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