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Pulse oximetry 

Pulse oximetry
Chapter:
Pulse oximetry
DOI:
10.1093/med/9780199202447.003.0054
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date: 15 October 2019

Pulse oximetry 328

When employed correctly, pulse oximetry is a rapid non-invasive method of assessing one of the key components of tissue oxygen delivery: the oxygen saturation of haemoglobin (SaO2).

Based on the laws of light absorbance and optical density (Lambert's law and Beer's law), i.e. the principle that deoxygenated and oxygenated hemoglobin absorb light at different wavelengths....

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