Physical demands of firefighter search and rescue in ambient environmental conditions.
This study investigated the physiological responses and limitations to a simulated search and rescue scenario in a high-rise building under ambient conditions. Sixteen firefighters performed the scenario under four conditions: standard duration breathing apparatus (SDBA) and 45 mm hose; extended duration breathing apparatus (EDBA) and 45 mm hose; SDBA and 70 mm hose; EDBA and 70 mm hose. Core temperature, skin temperature and heart rate were monitored. In four of 32 trials the casualty was rescued; the remainder of the trials were terminated for safety, high core temperature or shortage of air. Final core temperature and heart rate were higher in the EDBA (39.1 degrees C; 72% heart rate reserve (HRR)) than SDBA conditions (38.6 degrees C; 67%HRR). No differences were observed between hose sizes. The scenario proved too onerous to complete successfully in the majority of cases. Replacing SDBA with EDBA eliminates air supply as a limiting factor, but brings with it challenges of managing thermal strain.
Optimal Performance Ltd., Bedford House, Clifton, Bristol, UK. vic@optimalperformance.co.uk
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Richmond
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Rayson
D M
DM
Wilkinson
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JM
Carter
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Blacker
D000328:Adult; D001831:Body Temperature; D005260:Female; D005390:Fires; D006339:Heart Rate; D006801:Humans; D008297:Male; D008348:Manikins; D016272:Occupational Health; D018635:Rescue Work; D012134:Respiratory Protective Devices; D012881:Skin Temperature; D013647:Task Performance and Analysis