A modified SCBA facepiece for accurate metabolic data collection from firefighters

<div><p>To 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 K4b²) 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 K4b² and metabolic cart) and two masks (modified SCBA facepiece and stock manufacturer-supplied breath collection). Metabolic data collected with the Cosmed K4b² 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 K4b² system was replicated.</p></div

Average Speed under comfortable, fast, and slow walking conditions in 63 persons with mild, moderate, and severe MS.

<p>Note: Data are presented as mean (SD); CWS = Comfortable walking speed; FWS = Faster walking speed; SWS = Slower walking speed.</p

Demographic, Clinical, and Walking/Gait Characteristics of 63 persons with mild, moderate, and severe MS.

<p>Note: Data are presented as mean (SD) unless otherwise noted; 1 participant with moderate disability did not provide MS type; RRMS = Relapsing-remitting multiple sclerosis; EDSS = Expanded Disability Status Scale; 6MW = 6-minute walk; AD = Assistive Device; FAP = Functional ambulation profile; MSWS-12 = Multiple Sclerosis Walking Scale-12.</p

Actual and accelerometer-measured steps taken and accelerometer accuracy in 63 persons with mild, moderate, and severe MS.

<p>Note: Data are presented as mean (SD); CWS = Comfortable walking speed; FWS = Faster walking speed; SWS = Slower walking speed.</p