What are the most common wavelengths of light used in pulse oximetry?
A) 600 nm and 760 nm
B) 660 nm and 760 nm
C) 660 nm and 940 nm
D) 600 nm and 940 nm

Question

Quizplus · Accepted Answer

The most common wavelengths of light used in pulse oximetry are 660 nm and 940 nm. The 660 nm wavelength is absorbed by oxygenated hemoglobin, while the 940 nm wavelength is absorbed by both oxygenated and deoxygenated hemoglobin. By comparing the absorbance of these two wavelengths, the device can determine the oxygen saturation level in the blood.

What Are the Most Common Wavelengths of Light Used in Pulse