Some of those finger blood oxygen meters have a logging function with a graph and min/max blood oxygen levels reached overnight.
Does it show a consistent trace curve? Sounds like something really isn't right with what you are describing.
Not sure what you mean. There are small blood oxygen meters that you put your finger into and they give a reading. Some of these can log those readings over hours and show a graph, and also the min/max.
Would you please answer my other questions?
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