The effects of wearing facemasks on oxygenation and ventilation at rest and during physical activity
| Autor: | Richard Speicher, Steven L. Shein, Elizabeth Pace, Kathleen Deakins, Kira K. Mascho, Sofie Whitticar |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Male
Viral Diseases Physiology Epidemiology Emotions Social Sciences Walking Anxiety Hypoxemia Medical Conditions Heart Rate Medicine and Health Sciences Psychology Public and Occupational Health Hypoxia Multidisciplinary Masks Chemistry Infectious Diseases Anesthesia Physical Sciences Breathing Medicine Female medicine.symptom Research Article Chemical Elements Adult N95 Respirators Science Rest Cardiology Sitting Hypercarbia Heart rate medicine Humans Exercise physiology Exercise business.industry Biological Locomotion SARS-CoV-2 Chemical Compounds Biology and Life Sciences COVID-19 Covid 19 Physical Activity Carbon Dioxide Confidence interval Oxygen Surgical mask Medical Risk Factors business Pulmonary Ventilation human activities |
| Zdroj: | PLoS ONE PLoS ONE, Vol 16, Iss 2, p e0247414 (2021) |
| ISSN: | 1932-6203 |
| Popis: | Background Facemasks are recommended to reduce the spread of SARS-CoV-2, but concern about inadequate gas exchange is an often cited reason for non-compliance. Research question Among adult volunteers, do either cloth masks or surgical masks impair oxygenation or ventilation either at rest or during physical activity? Study design and methods With IRB approval and informed consent, we measured heart rate (HR), transcutaneous carbon dioxide (CO2) tension and oxygen levels (SpO2) at the conclusion of six 10-minute phases: sitting quietly and walking briskly without a mask, sitting quietly and walking briskly while wearing a cloth mask, and sitting quietly and walking briskly while wearing a surgical mask. Brisk walking required at least a 10bpm increase in heart rate. Occurrences of hypoxemia (decrease in SpO2 of ≥3% from baseline to a value of ≤94%) and hypercarbia (increase in CO2 tension of ≥5 mmHg from baseline to a value of ≥46 mmHg) in individual subjects were collected. Wilcoxon signed-rank was used for pairwise comparisons among values for the whole cohort (e.g. walking without a mask versus walking with a cloth mask). Results Among 50 adult volunteers (median age 33 years; 32% with a co-morbidity), there were no episodes of hypoxemia or hypercarbia (0%; 95% confidence interval 0–1.9%). In paired comparisons, there were no statistically significant differences in either CO2 or SpO2 between baseline measurements without a mask and those while wearing either kind of mask mask, both at rest and after walking briskly for ten minutes. Interpretation The risk of pathologic gas exchange impairment with cloth masks and surgical masks is near-zero in the general adult population. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|