Clipped to a fingertip, a pulse oximeter uses light beams to analyze your heart rate and the amount of oxygen being carried in your bloodstream. Normal levels in otherwise-healthy adults range between ...

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.

Early on in the COVID-19 pandemic, Kimani Toussant’s wife, an epidemiologist, brought him an article about how pulse oximeters appeared to be less accurate in people with darker skin. The small ...

(CNN)-- Often when Dr. Thomas Valley sees a new patient in the intensive care unit at Michigan Medicine in Ann Arbor, he clamps a pulse oximeter on their finger -- one of the many devices he uses to ...

In a suit filed against CVS, Walgreens, GE Healthcare and many other medical technology companies and sellers of pulse oximeters – devices that use light to measure oxygen saturation in the blood – ...