The effect of the moisture content of a local heat source on the blood flow response of the skin

• Published in: Archives of Dermatological Research 2009-09, Vol.301 (8), p.581-585
• Main Authors: Petrofsky, Jerrold Scott, Bains, Gurinder, Raju, Chinna, Lohman, Everett, Berk, Lee, Prowse, Michelle, Gunda, Shashi, Madani, Piyush, Batt, Jennifer
• Format: Article
• Language: English
• Subjects: Adult; Biological and medical sciences; Dermatology; Female; Hot Temperature; Humans; Male; Medical sciences; Medicine; Medicine & Public Health; Original Paper; Regional Blood Flow; Skin - blood supply; TRPV Cation Channels - physiology; Water - analysis
• ISSN: 0340-3696; 1432-069X
• DOI: 10.1007/s00403-009-0957-3

Numerous studies have examined the effect of local and global heating of the body on skin blood flow. However, the effect of the moisture content of the heat source on the skin blood flow response has not been examined. Thirty-three subjects, without diabetes or cardiovascular disease, between the ages of 22 and 32 were examined to determine the relationship between the effects of dry vs. moist heat applied for the same length of time and with the skin clamped at the same skin temperature on the blood flow response of the skin. The skin, heated with an infrared heat lamp (skin temperature monitored with a thermocouple) to 40°C for 15 min, was either kept moist with wet towels or, in a separate experiment, kept dry with Drierite (a desiccant) between the towels to remove any moisture. Before and after heat exposure of the forearm, blood pressure, heart rate, skin moisture content, skin temperature, and skin blood flow were recorded. The results of the experiment showed that there was no change in skin moisture after 15 min exposure to dry heat at 40°C. However, with moist heat, skin moisture increased by 43.7%, a significant increase ( P