Detect Covid 19 Even there is no symtoms and NRT-PCR test done..
Even you know this one- learn coorectly..
Pulse oximeter
Pulse oximetry is a noninvasive and painless test that measures your oxygen saturation level, or the oxygen levels in your blood. It can rapidly detect even small changes in how efficiently oxygen is being carried to the extremities furthest from the heart, including the legs and the arms.
* Normal limits.
* Treatments.
* Prevention
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