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 ORIGINAL CONTRIBUTION
Year : 1989  |  Volume : 55  |  Issue : 1  |  Page : 25--29

Responses To Thermal Stresses in Psoriasis of Hand



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PMID: 28112109

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Fifteen subjects having psoriasis on the hand, comprising both sexes, between 22 and 56 years in age and suffering for durations varying from 10 months to 20 years each with a sex and age niatched control were studied. A thermistor thermometer measured the skin temperature in ambient condition at the finger tip and at selected sites on the dorsa of hands and fingers, both at lesion site and lesion-free adjacent ones. In all cases except one, the thermistor readings were significantly lower (p ) in the psoriatic lesions than in the uninvolved adjacent skin. The hands were next subjected to thermal stresses: first by immersion in an ice-water bath at O'C (cold challenge) and later in a hot water bath at 450C (heat challenge) each for a period of 60 seconds. Immediately after each stress period,ithe fingertip temperatures were recorded, in psoriatic subjects, the finger-tip temperature dropped on cold challenge and the amount of drop expressed as percentage of the basal temperature was significantly less (p ) than the corresponding value for the control. There was no significant difference (p 0.05) in the respo se to the heat challenge between psoriat c and normal subjects. It appears that there is some fault in the local vasomotor tone in subjects with hand psoriasis.






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Online since 15th March '04
Published by Wolters Kluwer - Medknow