Patients admitted in the emergency care unit with an exacerbation of COPD or a cardiogenic APE requiring a non-invasive ventilation (i.e. for COPD patients pH\< 7.35, for APE patients: PCO2 \> 45 mmHg)
Patients affiliated to a social security system
You may not be if
Patients for which a non-invasive ventilation was initiated upon pre-hospital care
Contraindication for non-invasive ventilation
Patients for which non-invasive ventilation is not indicated
Patients for which capillary or arterial blood gas analyses are impossible
Adults subject to legal guardianship (guardianship, conservatorship)
