Originally posted by d000hg
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Even if your blood oxygen stays the same you don't know what other impacts it has. Does it stay the same because it isn't restricting oxygen or is it because your body finds another way to compensate and if so does this cause any other issue? These videos are always done using slim doctors in peak health.. is it applicable to the sick, fat, and elderly? Are pulse oximeters even the best thing to measure? Etc, etc, etc...
You get the point, you need a proper study design and more than a single data point.
I am all for wearing masks by the way (just not outside that's an overreach) just saying that telling someone with a respiratory issue that they are safe to wear a mask (someone who stated they had issues breathing with it on) because you saw a youtube video of a doctor wearing a mask with a pulse oximeter on is the exact opposite of science.
It's reckless and dangerous.
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