However, questions and controversy still surround the at-home use of pulse oximeters, especially when used to monitor for COVID-19. When doctors pointed out early in the pandemic that people with the coronavirus frequently arrive at the hospital with abnormally low oxygen levels, sales of pulse oximeters skyrocketed - especially after an op-ed piece in The New York Times recommended using them to detect a life-threatening condition called "silent hypoxia" that can indicate a severe coronavirus infection.
The small devices usually clip onto your finger and painlessly check your blood to determine how well your lungs are working, but Apple Watch Series 6 will build it right into the smartwatch.
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