Effect of Direct and Indirect Hand Heating on Hand Comfort and Finger Dexterity During Cold Exposure

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Authors
  1. Brajkovic, D.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);Toronto Univ, Toronto ONT (CAN) Dept of Community Health
Abstract
In the past, torso heating has been shown to be an effective method of keeping the extremities warm without hampering finger dexterity. This thesis examined the effects of different levels of torso heating (using an electrically heated vest) and body clothing insulation to determine the most effective means by which the extremities (fingers and toes) could be kept comfortable for three hours during exposure to -15C air while vest heater power was reduced. Finger dexterity was measured using two different tests to determine if finger dexterity could be maintained during torso heating. The results indicate that the extremities can be maintained at a comfortable level (finger and toe skin temperature above 25C) for three hours, but only when an adequate combination of clothing and heating are provided. The effect of torso heating on bare hand comfort was also examined during exposure to -25C air while the rate of body heat storage, core temperature, mean body skin temperature, finger temperature, finger blood flow, finger comfort and finger dexterity were measured during direct (using electrically heated gloves) and indirect hand heating (using active torso heating). The results indicate that during direct hand heating, the rate of body heat storage (S) was not a good indicator of extremity temperature over time, whereas during indirect heating, S was a good indicator of extremity temperature. TRUNCATED
Keywords
Handwear characteristics;Finger dexterity;Direct hand heating;EHV (Electrically Heated Vest)
Report Number
DCIEM-CR-2000-007 — Contract Report; Master's Thesis
Date of publication
28 Jun 1999
Number of Pages
310
DSTKIM No
CA001273
CANDIS No
513638
Format(s):
Hardcopy;Document Image stored on Optical Disk

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