The inspired oxygen content of air is 21%. Not 95%. And a mask does not change that. There is no such thing as an SpO2 oxygen intake.
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then you are at odds with the medical profession, and dead wrong.
No. I know what I am talking about. As is deal with this for a living.
You state that SpO2 oxygen intake. There is no such thing. The oxygen intake for the human body on room air is 21%. The SPo2 is the oxygen saturation as measured by fast Fourier transformation comparing 480 nm to 440 nm absorbed light at the level of the capillary usually a finger tip or ear lob. This translates to the oxygenation saturation. Masks do not change the inspires level of oxygenation in the air. Air is made of 78% nitrogen and 21% oxygen with the remaining 1% carbon dioxide and other gases
You state unequivocally that there is a change in inspired oxygen concentration by using terms you are unfamiliar with and trying to convince people you have some expertise. It is glaringly obvious you don’t know the first thing about respiratory physiology
Your premise may be that wearing a mask reduces oxygen saturation in the blood stream 6% or so. That would be in generally unhealthy lungs with simple surgical masks. Even a six percent reduction in a healthy lung where the average saturation is 97-100 would not cause any significant issues as the steep part of the oxygen desaturation curve starts around 85% where small changes in alveolar oxygen produce large changes in arterial oxygen.
You can look this up in basic physiology books or basic respiratory units. I am not at odds with most medical professionals Becuase I am a medical expert in reapirstoeu physiology and practice it everyday
Next time get your facts straight before having your head handed to you from an knowledge stand point.