!Massive Pulmonary Embolism
!Upper Airway Obstruction
Chronic Obstructive Pulmonary Diseasecommon
Chronic Obstructive Pulmonary Disease Exacerbation
Hypercapnic Respiratory Failure
Hypersensitivity Pneumonitis
Interstitial Lung Disease
Mainstem Bronchus Intubation
Peripheral Artery Disease
Unilateral Pulmonary Process