Question

What is the most accurate way to measure blood oxygen?

Answer 1

Pulse oximetry and arterial blood gas tests are methods to measure how much oxygen is in your blood. Normal oxygen saturation levels range from 97% to 99% in healthy people. When your blood oxygen is too low, it's called hypoxemia.

Answer 2

BONJOUR,
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$pulse \: oximetry \: \\ arterial \: blood \: gas \: \\ is \: the \: most \: accurate \: way \: to \: measure \: blood \: oxygen$