If your SpO2 dropped to the level of brain dysfunction and muscular paralysis simply because you put a piece of cloth across your face, you should never have been in the medical field to begin with because there’s something severely wrong with your pulmonary system.
You should seek medical assistance to help identify and correct whatever abnormality is causing this problem for you. In an N95 mask and walking on a treadmill for an hour at 2.5mph, normal test subjects see a ~0.4% decrease in SpO2. http://www.rcjournal.com/contents/05.10/05.10.0569.pdf
You have no idea what you are talking about. This percentage happens with everyone wearing a mask.
Happens with all the nurses, we all measured it.
No brain dysfunction happens at 86%, another example of you being stupiid and lying about all this.