How do pulse oximeters guess the oxygen level in your blood?
In: Other
It doesn’t guess it, it’s directly measured via light absorption. Oxygenated hemoglobin (HbO2) absorbs different wavelengths of light in different intensities than the non-oxygenated form (Hb). By using 2 LEDs with different wavelengths, you can work out how high the percentage of the oxygenated form is.
Latest Answers