CHANGES IN ARTERIAL INFLOW IN THE DOG'S LEG FOLLOWING VENOUS OCCLUSION: EVALUATION OF RESULTS OBTAINED WITH DIFFERENT TYPES OF FLOW RECORDERS

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Abstract
Expts. were performed to determine the effect of local elevation of venous pressure, by tourniquet or partial vein ligation, on arterial inflow to the leg of the anesthetized dog as measured by the rotameter, orifice meter and thermostromuhr. With the rotameter and orifice meter, arterial inflow decreased during venous pressure elevation and increased temporarily above the control value immediately following release of venous constriction. There is no reasonable doubt that under these conditions the immediate effect of such a procedure is a decrease in arterial inflow into a limb. With the thermostromuhr, the inflow changes were reversed, increasing and decreasing, respectively, with venous pressure elevation and release. These results are believed to be erroneous and can be attributed largely to the inadequacy of the thermostromuhr in measuring blood flow under conditions in which backflow is present in the cyclic flow pattern. The results of this study do not necessarily have any bearing on the therapeutic value of intermittent venous occlusion in the treatment of peripheral vascular disease.