Blood oxygen measurements taken with pulse oximeters in hospitals tend to be lower than they really are, according to the Equiox study, which was designed to assess the technology’s measurement ...

Dr. Takuo Aoyagi, a Japanese bioengineer, was the first to invent pulse oximetry in 1974. 2 The pulse oximeter is based on the light absorption characteristics of hemoglobin at different wavelengths.

Manufacturers increasingly but still infrequently follow Food and Drug Administration guidance that recommends testing pulse oximeters on participants with a range of skin pigmentations, according to ...