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No, the mask does not lower the oxygen levels



By Amy Norton HealthDay Reporter

Wednesday, November 3, 2020 (HealthDay News) – Masks: Yes, they may not be the most pleasant items to wear, but they do not deprive humans of oxygen, a study says. new research confirmed.

These findings will contradict a common myth about anti-masking – that masking is unhealthy.

Claims that masks reduce oxygen supplies, cause carbon dioxide “intoxication” and weaken the immune system have acquired steam, partly fueled by social media.

At the same time, health authorities – including the World Health Organization and the American Lung Association ̵

1; have released statements exposing those myths. But the claims still exist.

So researchers at McMaster University in Canada began testing the view: They gave 25 adults (average age: 76.5 years) a portable pulse oximeter to measure blood oxygen levels. masked staff, as well as before and after.

Investigators found no signs of hypoxia or hypoxia in the blood.

Of course, “this supports what we already know,” said Dr. Aaron Glatt, an infectious disease specialist not involved in the study. “There is no reduction in oxygen when wearing the mask.”

Glatt, a spokesman for the American Infectious Diseases Association, noted that some people may feel uncomfortable wearing a mask. But that’s not a reason not to do it, he said.

“I see the mask as a seat belt,” said Glatt. “They are not necessarily comfortable, but they protect you.”

For the study, Dr. Noel Chan’s team equips each participant with a disposable, non-medicated three-layer mask. Volunteers wear them during normal daily activities or at rest, and use a pulse oximeter to monitor oxygen levels for an hour before wearing the mask, while wearing them for an hour and an hour later. there.

Overall, there was no associated decrease in oxygen saturation in the blood. On average, the oxygen saturation was 96.1% before participants put on the mask, then slightly higher when they wore the mask and then – 96.5% and 96.3%, respectively.

The findings were published online in the form of a research letter in the October 30 issue of Journal of the American Medical Association.




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