title: [Hemodynamic response of the digital artery to heat and cold in normal subjects, in systemic scleroderma and in Raynaud's disease].
abstract: Measurement of digital systolic pressure under hot and cold conditions provides objective data (in mm Hg) of the humero-digital gradient and of spasm induced by cold. Normal values are: digital systolic pressure at 30 degrees C: 94 +/- 12% of humeral systolic pressure; at 15 degrees C: 94.46 +/- 9.32%, and at 10 degrees C: 93.6 +/- 12% of digital systolic pressure at 30 degrees C. The significance of these two parameters resides in the fact that the humero-digital gradient is of etiological value in organic arterial disease, the specificity of the test being 94.4% in allowing distinction between Raynaud's disease and systemic sclerosis. The cold-induced spasm can provide quantitative evaluation of a clinical Raynaud's phenomenon with which it is correlated (specificity: 96%).
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001794:Blood Pressure; D001795:Blood Pressure Determination / Q000379:methods; D003080:Cold Temperature; D005260:Female; D005385:Fingers / Q000098:blood supply*; D006358:Hot Temperature; D006801:Humans; D008297:Male; D008875:Middle Aged; D011928:Raynaud Disease / Q000503:physiopathology*; D012595:Scleroderma, Systemic / Q000503:physiopathology*; D013696:Temperature
vernacular_title: Hémodynamique de l'artère digitale au chaud et au froid des sujets sains, dans la sclérodermie généralisée et dans la maladie de Raynaud.