“My interpretation is that-for 99.9 percent of the population without severe underlying lung disease-there are at most only trivial decreases in blood oxygen levels with surgical or cloth masks,” she said. The report found a "decrease” in oxygen saturation in surgeons, “either due to the facial mask or the operational stress.” Prescott, who is also a staff physician at the Veterans Affairs Ann Arbor Health Care System, referred to a report published in 2008 which studied deoxygenation induced by surgical masks during major surgeries. The CDC does not recommend the use of N-95 masks to the general public. “It is true that masks may cause trivial changes to oxygen and carbon dioxide levels, but this is mainly seen with N95, not surgical or cloth face masks,” Hallie Prescott, Assistant Professor in the Division of Pulmonary & Critical Care Medicine at the University of Michigan Health System, said to AFP by email. Claim: If you wear a surgical mask for a long time, the oxygen in your blood and brain reduces A screenshot of the image used in some Facebook posts, taken on June 17, 2020ĭuring the novel coronavirus pandemic, which has killed more than 450,000 people globally, the official advice from the US Centers for Disease Control and Prevention (CDC) remains that wearing a mask or face covering is recommended where social distancing is difficult.ĪFP Fact Check asked medical experts to break down the claims presented in the image.
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