Safety and Health at Work

  • 제9권4호
  • /
  • Pages.468-472
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  • 2018
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  • 2093-7911(pISSN)
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  • 2093-7997(eISSN)
산업안전보건연구원 (Occupational Safety and Health Research Institute, Korea Occupational Safety and Health Agency)
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Respiratory Responses during Exercise in Self-contained Breathing Apparatus among Firefighters and Nonfirefighters

  • Hostler, David (SUNY University at Buffalo, Department of Exercise and Nutrition Sciences, Center for Research and Education in Special Environments (CRESE)) ;
  • Pendergast, David R. (SUNY University at Buffalo, Department of Physiology and Biophysics)
  • 투고 : 2017.02.16
  • 심사 : 2018.02.09
  • 발행 : 2018.12.30
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초록

Background: Firefighters are required to use self-contained breathing apparatus (SCBA), which impairs ventilatory mechanics. We hypothesized that firefighters have elevated arterial $CO_2$ 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 ($V_{O_2}$) more in controls than firefighters. End-tidal $CO_2$ ($ETCO_2$) 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 $ETCO_2$ 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 $ETCO_2$, and presumably increased arterial $CO_2$, during exertion. It is proposed that firefighters have altered $CO_2$ sensitivity due to voluntary hypoventilation during training and work. Confirmation of low $CO_2$ sensitivity and the consequence of this on performance and long-term health remain to be determined.

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참고문헌

  1. Louhevaara V, Smolander J, Tuomi T, Korhonen O, Jaakkola J. Effects of an SCBA on breathing pattern, gas exchange, and heart rate during exercise. J Occup Med 1985;27:213-6.
  2. Louhevaara V, Tuomi T, Smolander J, Korhonen O, Tossavainen A, Jaakkola J. Cardiorespiratory strain in jobs that require respiratory protection. Int Arch Occup Environ Health 1985;55:195-206. https://doi.org/10.1007/BF00383753
  3. Butcher SJ, Jones RL, Mayne JR, Hartley TC, Petersen SR. Impaired exercise ventilatory mechanics with the self-contained breathing apparatus are improved with heliox. Eur J Appl Physiol 2007;101:659-69. https://doi.org/10.1007/s00421-007-0541-5
  4. Donovan KJ, McConnell AK. Do fire-fighters develop specific ventilatory responses in order to cope with exercise whilst wearing self-contained breathing apparatus? Eur J Appl Physiol Occup Physiol 1999;80:107-12. https://doi.org/10.1007/s004210050565
  5. Williams-Bell FM, Boisseau G, McGill J, Kostiuk A, Hughson RL. Air management and physiological responses during simulated firefighting tasks in a high-rise structure. Appl Ergon 2010;41:251-9. https://doi.org/10.1016/j.apergo.2009.07.009
  6. Lanphier EH, Bookspan J. Carbon dioxide retention. In: Lundgren CEG, Miller JN, editors. The Lung at Depth. Marcel Dekker; 1999. p. 211-36.
  7. Thalmann ED, Sponholtz DK, Lundgren CE. Effects of immersion and static lung loading on submerged exercise at depth. Undersea Biomed Res 1979;6:259-90.
  8. Ray AD, Pendergast DR, Lundgren CE. Respiratory muscle training reduces the work of breathing at depth. Eur J Appl Physiol 2010;108:811-20.
  9. Ray AD, Pendergast DR, Lundgren CE. Respiratory muscle training improves swimming endurance at depth. Undersea Hyperb Med 2008;35:185-96.
  10. Held HE, Pendergast DR. Relative effects of submersion and increased pressure on respiratory mechanics, work, and energy cost of breathing. J Appl Physiol 1985;2013(114):578-91.
  11. Butcher SJ, Jones RL, Eves ND, Petersen SR. Work of breathing is increased during exercise with the self-contained breathing apparatus regulator. Appl Physiol Nutr Metab 2006;31:693-701. https://doi.org/10.1139/h06-073
  12. Ogoh S, Ainslie PN. Regulatory mechanisms of cerebral blood flow during exercise: new concepts. Exerc Sport Sci Rev 2009;37:123-9. https://doi.org/10.1097/JES.0b013e3181aa64d7
  13. Brothers RM, Ganio MS, Hubing KA, Hastings JL, Crandall CG. End-tidal carbon dioxide tension reflects arterial carbon dioxide tension in the heat-stressed human with and without simulated hemorrhage. Am J Physiol Regul Integr Comp Physiol 2011;300:R978-83. https://doi.org/10.1152/ajpregu.00784.2010
  14. Robertson RJ, Goss FL, Dube J, Rutkowski J, Dupain M, Brennan C, Andreacci J. Validation of the adult OMNI scale of perceived exertion for cycle ergometer exercise. Med Sci Sports Exerc 2004;36:102-8. https://doi.org/10.1249/01.MSS.0000106169.35222.8B
  15. Louhevaara V, Tuomi T, Korhonen O, Jaakkola J. Cardiorespiratory effects of respiratory protective devices during exercise in well-trained men. Eur J Appl Physiol Occup Physiol 1984;52:340-5. https://doi.org/10.1007/BF01015224
  16. Grassi B, Ferretti G, Costa M, Ferrigno M, Panzacchi A, Lundgren CE, Marconi C, Cerretelli P. Ventilatory responses to hypercapnia and hypoxia in elite breathhold divers. Respir Physiol 1994;97:323-32. https://doi.org/10.1016/0034-5687(94)90068-X
  17. Pendergast DR, Lindholm P, Wylegala J, Warkander D, Lundgren CE. Effects of respiratory muscle training on respiratory $CO_2$ sensitivity in SCUBA divers. Undersea Hyperb Med 2006;33:447-53.

피인용 문헌

  1. Evaluation of CBRN Respirator Protection in Simulated Fire Overhaul Settings vol.65, pp.7, 2018, https://doi.org/10.1093/annweh/wxab004
  2. Preventing and Monitoring Work-Related Diseases in Firefighters: A Literature Review on Sensor-Based Systems and Future Perspectives in Robotic Devices vol.18, pp.18, 2021, https://doi.org/10.3390/ijerph18189723