Cos (@c0s)
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Yup, this is complete political BS (or a completely incompetence) on his part @pmcl You're right: normal SpO2 levels taken with pulse oximeter a nurse would typically put on your finger) is between 95 to 100 (which corresponds to arterial oxygen of 75 to 100 mm/Hg, if one wants to go deeply technical). Levels <90 are considered low. As my former boss used to say to schmucks like that "dr" above: "You're either an idiot or an enemy."
