Hypoxia at Multiple Wavelengths of Light

Inclusion Criteria: * Is between 18 and 35 years of age * Is American Society Anesthesiologist status 1 * Has a BMI between 18 and 30 Exclusion Criteria: * Currently taking any medications other than birth control pills * Has participate in an investigational drug study within one month prior to the start of the study * Fails the Allen's Test to confirm patency of the colateral artery * Subject is female with a positive pregnancy test, or is female and is unwilling to use effective birth control between the time of screening and study termination * Has a positive urine continine or drug test * Has an reported allergy to Lidocaine * Has anemia or other hemoglobinopathy * Has a room air saturation less than 95% by pulse oximetry * Has an abnormal EKG * Has an abnormal pulmonary function test via spirometry * Is intolerant to a breathing mask apparatus * Has a COHb greater than 3%, or MetHb greater than 2% * Has another condition, which in the opinion of the principle investigator would not be suitable for participation in the study * Is unwilling or unable to provide informed consent or comply with the study procedures