Blood oxygen monitor on the finger of a patient in an intensive care ward.

- Image ID: B6DW86
Science Photo Library / Alamy Stock Photo
Image ID: B6DW86
andlt;strongandgt;MODEL RELEASED. Blood oxygen meterandlt;/strongandgt; on the fingerof a patient in an intensive care ward. Thisdevice, also known as a pulse oximeter, measuresthe pulse rate and oxygen concentration of theblood.