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DTIC ADA274744: Rewarming Methodologies in the Field |
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by Defense Technical Information Center |
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The Heatpac is currently used by the U.S. Marine Corps to |
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warm cold- stressed infantry personnel in the field. |
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Recently, this system has been modified so a small |
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wetting chamber called Humipac can be attached to the |
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Heatpac so personnel can breathe warm humidified air. The |
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air is saturated to 95-99% humidity with a temperature |
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range of 45.3 to 49.4 deg C. In a series of experiments |
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using a USMC issue sleeping bag, we compared the |
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effectiveness of the Heatpac vs. combined Heatpac/Humipac |
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vs. rewarming by shivering. Subjects wearing only |
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swimming trunks were placed in 12.8 deg C water for 1 hr. |
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At the end of that period, any of the three interventions |
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were randomly assigned. In all conditions, the subject |
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was placed in a sleeping bag. HR, T(re) and T(es) |
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temperatures, and metabolic rates were monitored during |
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the cooling phase and for 120 min during the rewarming |
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phase. Breathing the warm humidified air did not |
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significantly alter the rate of body rewarming. In some |
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cases, normal shivering induced as large an increase in |
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core temperature as did the active interventions. |
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Additional studies are underway to investigate the |
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relative role that these various rewarming systems have |
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on thermogenesis. |
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Date Published: 2018-03-14 06:28:15 |
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Identifier: DTIC_ADA274744 |
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Item Size: 11756997 |
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Language: english |
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Media Type: texts |
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# Topics |
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DTIC Archive; Feith, S ; NAVAL HEALTH... |
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