TITLE

Pitfall of Venous Occlusion Plethysmography

AUTHOR(S)
Knox, R.; Cramer, M.; Fell, G.; Breslau, P.; Beach, K.; Strandness Jr., D.E.
PUB. DATE
April 1982
SOURCE
Angiology;Apr1982, Vol. 33 Issue 4, p268
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The supposition that the lower limb expands uniformly in circumference during venous occlusion has been investigated. The 3 compartments of the calf were found to expand to differing degrees depending on the volume of muscle within the compartment. The effect of this phenomenon on the measurement of venous outflow and capacitance using an overlapping strain gauge was assessed. When using an overlapping strain gauge, the anatomical site of overlap was found to alter the measured values of outflow and capacitance by as much as 50%. These errors do not arise with strain gauges designed to fit a small range of limb circumferences, so that no overlap occurs. The reproducibility of plethysmography may be enhanced by attention to the site and degree of overlap of gauges which are designed to fit all sizes of limb. Technicians performing venous occlusion plethysmography should be aware of these variations, so that the examination technique can be standardized.
ACCESSION #
16437731

 

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