[Radix]

Ordinarily you will not get a false ‘high’ from a Pulse Oximeter. False lows are common. Any reading below 60 or so (cannot say precisely) is valueless.

If you use an oximeter and get a reading in the 50s, throw the thing away. I have one that seems to work pretty good. A dozen years or so ago those devices were selling for hundreds of Dollars. These days they are practically giving them away.

I know that this is going to come across as seeming naive, but these things really should be approved by the FDA. You cannot use them in hospitals unless they are.

[reed13k]

They are registered with the FDA as class 2 devices.

[Cletus.D.Yokel]

:: but these things really should be approved by the FDA. You cannot use them in hospitals unless they are. ::

I will use mine for gathering data points if I fall ill.
Kinda like the PCR test.
Or spaghetti sauce on my shirt.