Respiratory Responses during Exercise in Self-contained Breathing Apparatus among Firefighters and Nonfirefighters

Autor: David Hostler, David R. Pendergast
Rok vydání: 2018
Předmět:
Respiratory rate
SCBA
self-contained breathing apparatus
RR
respiratory rate
Work rate
03 medical and health sciences
0302 clinical medicine
ETCO2
end-tidal carbon dioxide
Heart rate
Medicine
Exertion
Respiratory system
IDLH
immediately dangerous to life and health
Safety
Risk
Reliability and Quality
Exercise
Protective equipment
VO2
oxygen consumption
Chemical Health and Safety
HR
heart rate
business.industry
lcsh:Public aspects of medicine
Public Health
Environmental and Occupational Health
Self-contained breathing apparatus
lcsh:RA1-1270
030229 sport sciences
VO2max
maximal oxygen consumption
Hypoventilation
VE
ventilation
Carbon dioxide retention
Anesthesia
Breathing
PaCO2
partial pressure carbon dioxide in arterial blood
Original Article
medicine.symptom
business
Safety Research
030217 neurology & neurosurgery
Zdroj: Safety and Health at Work
Safety and Health at Work, Vol 9, Iss 4, Pp 468-472 (2018)
ISSN: 2093-7911
DOI: 10.1016/j.shaw.2018.02.002
Popis: Background: Firefighters are required to use self-contained breathing apparatus (SCBA), which impairs ventilatory mechanics. We hypothesized that firefighters have elevated arterial CO2 when using SCBA. Methods: Firefighters and controls performed a maximal exercise test on a cycle ergometer and two graded exercise tests (GXTs) at 25%, 50%, and 70% of their maximal aerobic power, once with a SCBA facemask and once with protective clothing and full SCBA. Results: Respiratory rate increased more in controls than firefighters. Heart rate increased as a function of oxygen consumption (V.O2) more in controls than firefighters. End-tidal CO2 (ETCO2) during the GXTs was not affected by work rate in either group for either condition but was higher in firefighters at all work rates in both GXTs. SCBA increased ETCO2 in controls but not firefighters. Conclusions: The present study showed that when compared to controls, firefighters’ hypoventilate during a maximal test and GXT. The hypoventilation resulted in increased ETCO2, and presumably increased arterial CO2, during exertion. It is proposed that firefighters have altered CO2 sensitivity due to voluntary hypoventilation during training and work. Confirmation of low CO2 sensitivity and the consequence of this on performance and long-term health remain to be determined. Keywords: Carbon dioxide retention, Exercise, Protective equipment, Self-contained breathing apparatus
Databáze: OpenAIRE
Externí odkaz: