Question of the Day – Friday, November 4, 2022
Can methylene blue affect pulse oximeter readings? Vital dyes, such as methylene blue, can cause erroneously low pulse oximetry readings due to absorption of light at 660 nm or 940 nm; however, these effects tend to be transient and resolve rapidly as the dyes are…
Question of the Day – Thursday, November 3, 2022
Can the use of nail polish affect pulse oximeter readings? The use of nail polish can potentially affect pulse oximeter readings if the polish absorbs light at 660 nm and/or 940 nm. A small study of volunteers wearing black, green, and blue nail polish revealed…