Comparison of Variability in Attainable Travel Distance & Human Performance Between 2 Types of SCSR
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Previous research has shown performance variability between 4 models of SCSR, furthermore with body weight (Turner, et al., 2002). Others have indicated that the usable oxygen supply by a chemical oxygen SCSR is variable at high work rates, which would produce a wide variation of travel distance during an escape (Johnson, et al., 2007).
This investigation would measure the distance traveled while using a single submaximal work rate in order to evaluate whether the quantity of usable oxygen in two different types of SCSR affects escape distance.
While breathing from an SCSR, subjects (10 miners) would exercise on a treadmill at a submaximal level of energy expenditure (~1.35 L/min.) until fatigued, oxygen supply is exhausted, CO2 is not scrubbed effectively, FIO2 < 19.5%, or FICO2 > 4%
SCSR would include chemical oxygen (Draeger OXY-K Plus and CSE SR100) and compressed oxygen (Ocenco EBA 6.5 and Ocenco M20). Dockable-hybrid SCSR (TPI) will be included pending NIOSH-approval.
Results would determine whether use rate affects the quantity of usable oxygen provided by different SCSR.