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 a drop in SaO2 of 3, 5, and 6 percent, respectively.
Ralston AC, Webb RK, Runciman WB. Potential errors in pulse oximetry. III: Effects of interferences, dyes, dyshaemoglobins and other pigments. Anaesthesia. 1991 Apr;46(4):291-5. doi: 10.1111/j.1365-2044.1991.tb11501.x. PMID: 2024749