The doctors and nurses didn’t believe Tomisa Starr was having trouble breathing. Two years ago, Starr, 61, of Sacramento, California, was in the hospital for a spike in her blood pressure.

Pulse oximeters measure the amount of light that passes through the skin as a way to estimate how much oxygen is in a patient’s red blood cells. Melanin, which absorbs light that passes through ...

A pulse oximeter is a small device that clips onto your fingertip, earlobe, or other body part (e.g., nose, toe) and sends ...

The Food and Drug Administration’s recommendations apply to pulse oximeters, which are clip-on devices used in hospitals and medical clinics to ensure patients are getting enough oxygen.