Journal of Occupational and Environmental Hygiene · 2005 · 21 citations · 2 references
Life SciencesKinesiologyPhysiologyExercise PhysiologyExercise TestingThermal ComfortBreathing ExercisesCardiorespiratory FitnessLung VolumesMechanical VentilationBreathing Exercise PhysiologyComfortCoolingInspiratory Flow Rate EffectsPowered Air-purifying RespiratorsRespirator Performance EvaluationRespiratory Mechanics During Exercise
Sixteen subjects exercised at 80-85% of maximal aerobic capacity on a treadmill while wearing a tight-fitting, FRM40-Turbo Powered Air Purifying Respirator (PAPR). The PAPR was powered by a DC power supply to give flow rates of 0%, 30%, 66%, 94%, and 100% of rated maximum blower capacity of 110 L/min. As flow rate was reduced, so was performance time. There was a 20% reduction in performance time as blower flow changed from 100% to 0% of maximum. Significant differences in breathing apparatus comfort and facial thermal comfort were found as flow rate varied. It was concluded that inadequate blower flow rate decreases performance time, facial cooling, and respirator comfort.
2