HEAT STRAIN PRODUCED BY A 3 AIRCREW CHEMICAL DEFENCE ENSEMBLES UNDER HOT CONDITIONS: IMPROVEMENT WITH AN AIR-COOLING VEST

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Authors
  1. Vallerand, A.L.
  2. Schmegner, I.F.
  3. Michas, R.D.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
The heat strain produced by three different Canadian Forces chemical defence (CD) individual protection ensembles (IPE) was studied under simulated hot cockpit conditions with an air-cooling vest (AC) and with no cooling (NC). Seven healthy males were randomly subjected to six heat stress tests (37C, 50% r.h., target of 150 min) using the helicopter IPE with AC-4 mask (H4), the helicopter IPE with AR-5 hood/respirator (H5), and the CF-18 fighter IPE (F) with AR-5 respirator and anti-G suit. Whatever the IPE, AC increased heat exposure time and totalheat losses, and decreased the change in core (delta T sub re/h) and whole body mean skin temperatures (delta T sub sk(WB)/h) (P<0.05). Differences within IPEs appeared restricted to the F-NC condition. F-NC produced a lower heat exposure time (vs H4-NC and H5-NC) and sweat evaporation rate (vs H4-NC), and a greater delta T sub sk(WB)/h (vs H4-NC and H5-NC) and T sub re at min 80 (vs H5-NC) (P<0.05). TRUNCATED
Report Number
DCIEM-91-40 — Reprint
Date of publication
15 Jan 1992
Number of Pages
18
Reprinted from
Performance of Protective Clothing, vol 4, no 1133, 19
DSTKIM No
93-00243
CANDIS No
127470
Format(s):
Hardcopy;Originator's fiche received by DSIS;Document Image stored on Optical Disk

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