• Ergonomics · Jan 2015

    A modified SCBA facepiece for accurate metabolic data collection from firefighters.

    • Richard M Kesler, Elizabeth T Hsiao-Wecksler, Robert W Motl, Rachel E Klaren, Ipek Ensari, and Gavin P Horn.
    • a Fire Service Institute, University of Illinois , Urbana-Champaign , IL , USA.
    • Ergonomics. 2015 Jan 1; 58 (1): 148-59.

    AbstractTo better assess the energy expenditure and exertion of firefighters during simulated firefighting activities, a commercial firefighter self-contained breathing apparatus (SCBA) facepiece was modified to interface with a portable metabolic monitoring device (Cosmed K4b(2)) while still functioning as a positive pressure SCBA air supply. To validate the device, standard National Fire Protection Association 1981 SCBA function tests were conducted and 14 subjects performed variable-workload assessments using all combinations of two test devices (Cosmed K4b(2) and metabolic cart) and two masks (modified SCBA facepiece and stock manufacturer-supplied breath collection). Metabolic data collected with the Cosmed K4b(2) via the modified facepiece were found to be accurate when compared to a ParvoMedics Truemax 2400 metabolic cart (average per cent difference: 4.6%). This modified facepiece design is suitable for use in metabolic studies requiring the utilisation of an SCBA system. Furthermore, the well-established overestimation of oxygen consumption from the Cosmed K4b(2) system was replicated.

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