Excess cumulative blood flow and repayment during reactive hyperemia in human cutaneous tissue
- 1 January 1980
- journal article
- research article
- Published by Wiley in Acta Physiologica Scandinavica
- Vol. 108 (1), 1-6
- https://doi.org/10.1111/j.1748-1716.1980.tb06493.x
Abstract
The influence of duration of vascular occlusion upon the reactive hyperemic response in human cutaneous tissue was studied in 6 subjects. Blood flow in cutaneous tissue was measured dorsally on the distal phalanx of the 2nd finger by the local 133Xe washout technique. Post-occlusive blood flow, calculated from the steepest part of the 133Xe washout curve just after release of vascular occlusion, reached a maximum value when duration of vascular occlusion was 12 min. Excess cumulative blood flow, i.e., the integrated blood flow during reactive hyperemia minus integrated pre-ischemic blood flow for a period corresponding to the duration of the reactive hyperemic response, increased with increasing duration of vascular occlusion from 3-24 min. Fractional repayment, i.e., excess cumulative blood flow divided by pre-ischemic blood flow times duration of vascular occlusion, was not correlated significantly to duration of vascular occlusion. There was a significant inverse correlation between fractional repayment and pre-occlusive blood flow, indicating that, besides metabolic factors, pre-ischemic blood flow in cutaneous tissue is influenced by other factors, such as heat regulation.Keywords
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