A Quantitative Test for Measuring Reactivity to Cold by the Digital Plethysmograph Technique: Application to 66 control subjects and 65 patients with Raynaud's phenomenon

Planchon, B.; de Faucal, Ph.; Essboui, S.; Grolleau, J. Y.
June 1986
Angiology;Jun1986, Vol. 37 Issue 6, p433
Academic Journal
The authors have developed a vascular reactivity test to cold using the digital plethvsmograph technique with a mercury strain gauge. Three types of arterial reactivity were determined: local reactivity after immersion of the hand in 11°C water, general reactivity after thorax ventilation, and cumulative reactivity associating both of these cooling modes. The method is based on tneasurement of the digital plethysmographic signal expressed as a ratio of a reference warm amplitude obtained after immersion of the hand in 45°C water for 3 mm. The method was tested and perfected in 66 control subjects before being applied to 65 patients with Raynaud's disease. Significant differences were noted between these 2 groups, especially in cumulative reactivity (p < 10-9), which led to numerical expression of results in 5 types of increasingly important reactivity. It would appear that the test has diagnostic and prognostic value in the exploration of vascular acrosyndromes and their therapeutic follow-up.


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