A HUMAN NECESSITIES
A61 MEDICAL OR VETERINARY SCIENCE; HYGIENE
A61M DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
A61M2205/00 General characteristics of the apparatus
A61M2205/33 Controlling, regulating or measuring
A61M2205/3306 Optical measuring means
A61M2205/3313 used specific wavelengths