Evaluation of automatic titration of oxygen with a new version of FreeO2 (V4)

In the previous studies, the investigators used many times automatic titration of oxygen on spontanous breathing patient (FreeO2 device) with a prototype develop in our lab in collaboration with Laval university. In this study, we want to evaluate the new version of the FreeO2 device (V4)

Inclusion Criteria:

• Age > or = 18 years old
• Patient receiving oxygen between 1 to 6 lpm for medical pathology
• Admitted to a medical service for less than 72 hours (emergency room not included)

Exclusion Criteria:

• Unreliable SpO2 signal
• Emergency or intensive care hospitalization
• Absence of NIV or intubation criteria at baseline
• Sleep apnea not paired
• Long-term Oxygen Therapy
• Active delirium and cognitive impairment preventing informed consent