AdvertisementWhen it comes to darker skin, pulse oximeters fall short04:18Download AudioResumeJuly 11, 2022Craig LeMoultfacebookEmailA pulse oximeter is worn by Brown University professor Kimani Toussaint. The devices have been shown in research to produce inaccurate results in dark-skinned people, and Toussaint's lab is developing technology that would be more accurate, regardless of skin tone. (Craig LeMoult)