Journal
SKIN RESEARCH AND TECHNOLOGY
Volume 20, Issue 1, Pages 43-49Publisher
WILEY
DOI: 10.1111/srt.12081
Keywords
blood flow; heat flux; stratum corneum; thermal resistance; moisture
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PurposeWe analyzed skin heat conduction under moist and dry heat conditions to confirm the influence of moist heat on the skin and subcutaneous region. MethodsSix healthy subjects placed their forearms in moist and dry heat air chambers, and the thickness of and moisture levels in the stratum corneum were measured. Skin surface temperatures, heat flux, and skin blood flow were measured in 11 healthy subjects. ResultsWithin 10min, the stratum corneum in skin exposed to moist heat reached a thickness of about 150%, and water content in the stratum corneum increased to about 200%. In contrast, the thickness of water content in the stratum corneum did not change in the dry heat condition. Skin surface temperatures of skin exposed to moist heat were significantly higher after 0.5min of exposure (P<0.01), the skin surface heat flux was greater, and blood flow was significantly higher (P<0.05) after 10min than that of skin exposed to dry heat. ConclusionStratum corneum moisture levels and skin surface heat conductivity were higher in the moist heat condition and skin blood flow was significantly greater than that in skin exposed to dry heat. Therefore, moist heat is more efficient at warming the body than dry heat.
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