Performance when breathing through different respirator inhalation and exhalation resistances during hard work

Journal of Occupational and Environmental Hygiene
D M CarettiFrank C Koh

Abstract

Respirator inspiratory and expiratory breathing resistances impact ventilation and performance when studied independently. However, it is less clear as to how various combinations of inhalation and exhalation resistance affect user performance. The present study investigated the performance of 11 individuals during constant load, demanding work to exhaustion while wearing respirators with eight different combinations of inhalation and exhalation resistance. Exercise performance time, performance rating, minute volume, and peak inspiratory and expiratory airflow were recorded at the end of each test trial, and independent correlations with inhalation resistance and exhalation resistance were assessed. The combined impacts of respirator inhalation and exhalation resistances were quantified as the total external work of breathing (WOB(tot)) and correlations between the test variables and WOB(tot) were also examined. Significantly linear decreases in performance were found with increased inhalation resistances independent of exhalation resistance (R(2) = 0.99; p < 0.001) and with increased WOB(tot) (R(2) = 0.92; p < 0.001). Performance also decreased with increased exhalation resistance but no significant relationships were found. ...Continue Reading

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Citations

Jun 12, 2012·Journal of Huazhong University of Science and Technology. Medical Sciences = Hua Zhong Ke Ji Da Xue Xue Bao. Yi Xue Ying De Wen Ban = Huazhong Keji Daxue Xuebao. Yixue Yingdewen Ban·Man Qiu, Sheng Wang
Jul 22, 2006·Journal of Occupational and Environmental Hygiene·Karen CoyneFrank Koh
Apr 28, 2012·The Annals of Occupational Hygiene·Hyun-Woo Cho, Chung-Sik Yoon
Oct 2, 2007·Prehospital Emergency Care : Official Journal of the National Association of EMS Physicians and the National Association of State EMS Directors·William E NorthingtonDavid Hostler
Feb 13, 2016·Journal of Biological Engineering·Arthur T Johnson
Oct 30, 2015·Journal of Occupational and Environmental Hygiene·Jo Anne G Balanay, Claudiu T Lungu
Mar 6, 2008·Journal of Cerebral Blood Flow and Metabolism : Official Journal of the International Society of Cerebral Blood Flow and Metabolism·Nicola A EnglystChristopher D Byrne
Dec 29, 2010·Journal of Occupational and Environmental Medicine·Philip HarberYihang Liu
Sep 28, 2021·Revista Portuguesa De Cardiologia : Orgão Oficial Da Sociedade Portuguesa De Cardiologia = Portuguese Journal of Cardiology : an Official Journal of the Portuguese Society of Cardiology·Tiago PimentaAfonso Rocha
Nov 10, 2020·American Journal of Infection Control·Sinan SousanJo Anne Balanay

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