The purpose of the study is to randomly and prospectively evaluate the differences in outcomes between the control group (closed full facemask immediate post-extubation with standard oxygenating device used post-operatively in PACU) and the SuperNO2VA™ group (SuperNO2VA™ immediate post-extubation and post-operatively in PACU)

Inclusion Criteria:

1. Age 18 years of age or older
2. Patients scheduled for general anesthesia with a supraglottic device or ETT
3. American Society of Anesthesiology (ASA) Physical Status I-IV (E)
4. Has provided written informed consent
5. BMI > 35 kg/m2 or documented Obstructive Sleep Apnea

Exclusion Criteria:

1. Inability to give informed consent
2. ASA V (E)
3. Allergy to Propofol
4. Any condition, in the Investigator's opinion, that would conflict or otherwise prevent the subject from complying with study required procedures, schedule or other study conduct
5. BMI < 35 kg/m2 with no documented diagnosis (known) of Obstructive Sleep Apnea
6. Known diagnosis of moderate to severe COPD/lung disease
7. Patients that remained intubated post-operatively
8. Patient refusal to wear the treatment device (SuperNO2VA™, nasal cannula, or oxygen facemask) for the duration of the study period postoperatively