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A A Pract ; 14(7): e01237, 2020 May.
Article in English | MEDLINE | ID: covidwho-601324


We evaluated a full-face snorkel mask with an airway circuit filter to protect health care providers against airborne pathogens. First, a quantified N95 fit test was performed using aerosolized saline. Second, cardiorespiratory variables (heart rate, peripheral oxygen saturation, end-tidal carbon dioxide tension, and inspired fraction of carbon dioxide) were measured at rest and during moderate exercise. The modified mask passed the United States Occupational Safety and Health Administration (OSHA) N95 respirator (N95) fit test requirements with a fit factor of 142. Neither hypercapnia nor hypoxemia occurred. This modified mask has the potential to protect providers who care for patients with coronavirus disease 2019 (COVID-19).

Coronavirus Infections/prevention & control , Equipment Design , Health Personnel , Infectious Disease Transmission, Patient-to-Professional/prevention & control , Pandemics/prevention & control , Pneumonia, Viral/prevention & control , Respiratory Protective Devices , Betacoronavirus , Carbon Dioxide , Coronavirus Infections/transmission , Heart Rate , Humans , Masks , Oximetry , Oxygen , Pneumonia, Viral/transmission , Respiration , United States , United States Occupational Safety and Health Administration
Apunts Sports Medicine ; 2020.
Article | COVIDWHO | ID: covidwho-549135


ABSTRACT Introduction: Due to the mandatory use of a mask, and the authorization to do outdoor sports in Catalonia, we try to assess the physiological impact of the hypercapnia hypoxia generated by the masks during aerobic sports practice Methods: Eight subjects (2 women) were assessed at baseline with and without a mask, and then a 21-flex test was performed following the Ruffier protocol with a mask Control of HR (heart rate), concentration of O2 and CO2 inside the mask and SatO2 The test was carried out in ambient air in squares in the city of Barcelona Results: A decrease in O2 was recorded comparing the three conditions, baseline 20 9%, baseline mask 18 3%, post-exercise 17 8% (p <0 001) An increase in CO2 in the three preconditions (464, 14162, 17000 ppm;p <0 001) Basal saturation O2 was 97 6 ± 1 5% and post exercise 92 1 ± 4 12% (p 0 02) Conclusions: The use of masks in athletes causes hypoxic and hypercapnic breathing, being more evident in effort The use of masks during a short exercise with an intensity around 6-8 METS, decreases O2 by 3 7% and increases the CO2 concentration by 20%