don't have a pulse oximeter S.C. but i understand that what our brain is telling us, with "ansd" is not always life threatening.actually, i think they say it is not life threatening at all...ha ha, who says, and who knows since it is still in "infancy". sometimes i feel so awful i check my hr/bp and it is not er condition or even sometimes it is normalish....so why the breath issues? brain cog, body tremors, etc. sometimes it is uber messed up, especially bp.