Health24.com | What Is a pulse oximeter, and should you get one to warn of Covid-19?

A pulse oximeter measures the concentration of oxygen in the blood by clipping the device onto a patient's finger.

from Health24 News https://www.health24.com/Medical/Infectious-diseases/Coronavirus/what-is-a-pulse-oximeter-and-should-you-get-one-to-warn-of-covid-19-20200429