What is pulse oximetry and how does it work?

What is pulse oximetry and how does it work? Pulse oximetry is a noninvasive method that enables rapid measurement of the oxygen saturation of hemoglobin in arterial blood.1 It can rapidly detect changes in oxygen saturation, thus providing an early warning of dangerous hypoxemia.2, 3 How it works: A pulse oximeter (like the Nonin GO2) shines light at two wavelengths—red and infrared—through a…

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