Can a Face Mask Cause CO2 Poisoning? Fact-Checking The Conspiracy
published in Respiratory Physiology and Neurobiology, twenty subjects wearing surgical masks walked on treadmills for one hour. Scientists measured their blood oxygen and carbon dioxide concentrations, respiratory and heart rates, and core temperatures. After that hour, the scientists found no significant change in these measurements.
With N95 masks, it’s a slightly different story. There is some evidence that these masks, which tend to fit more tightly over the wearers face, can decrease oxygen levels and increase carbon dioxide levels. Aof ten healthcare workers found that the oxygen and carbon dioxide concentrations within N95 masks fell below workplace standards set by the
Occupational Safety and Health Administration. Still, when the scientists compared the subjects’ blood oxygen levels after one hour on the treadmill in an N95 mask versus an hour without, they found no difference.published in the American Journal of Infection Control found similar results with pregnant study subjects — after an hour of walking in N95 masks, the blood oxygen levels of pregnant women and non-pregnant women alike hadn’t changed.
chronic obstructive pulmonary disease , wearing a face mask for a long period of time might pose more of a risk than to the general public. The
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