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KMID : 0853020150180020074
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Journal of Korean Burn Society
2015 Volume.18 No. 2 p.74 ~ p.80
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The Mechanism of Low Temperature Burn and Clinical Cases
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김승수:Kim Seung-Soo
양완석:Yang Wan-Suk/심정현:Sim Jeong-Hyun/서대우:Suh Dae-Woo/백승현:Baik Seung-Hyun/백봉수:Baik Bong-Soo
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Abstract
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Purpose: This study was designed to better understand the mechanism of low temperature burn and to show clinical cases of low temperature burn.
Methods: The local temperature increase of electric pad was investigated at 4 different surface cooling conditions. Blocks (5x5x2 cm3) made of silicone rubber, aluminum, or urethane foam were placed on the top of the electric pad, and temperature between the blocks and electric pad was measured up to 7 hours after switching on maximally (level 7). Each block has different thermal conductivity (TC) and TC of silicone rubber (0.2 W/m·oC) is similar to TC of human skin (0.37 W/m·oC). TC of aluminum is higher and TC of urethane foam is lower than TC of human skin. Experiments were performed on two occasions with or without a blanket covering over the electric pad and blocks.
Results: The initial surface temperature (18oC) of the electric pad under the silicone rubber block was elevated to 36.5oC at 1 hour, 41.8oC at 3 hours, 44.2oC at 5 hours, and 45.5oC at 7 hours. After covering the electric pad and blocks with a blanket, the temperature of the electric pad under the silicone rubber block was elevated to 40.9oC at 1 hour, 51.8oC at 3 hours, 56.1oC at 5 hours and 58.1oC at 7 hours. Under the same conditions, surface temperatures under the urethane foam and aluminum blocks were 70.8oC and 50.2oC respectively at 7 hours.
Conclusion: The local temperature increase of electric pad was dependent on the surface cooling conditions, heating time and blanket covering over the electric pad. The surface temperature increased to 56.1oC at 5 hours after blanket cov-ering over the silicone block which temperature can cause severe injuries on the human skin within a minute.
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KEYWORD
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Burns, Heating, Mattresses
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