Dyspnea Ddx

Airways diseaseo Upper airway obstruction (foreign body, anaphylaxis, mass)o Asthmao COPDo Mucous plugging

Parenchyma lung diseaseo Pneumoniao ARDSo Interstitual lung disease (fibrosis)

Vascularo PEo Pulmonary HTNo Vasculitis

Pleural diseaseo Pneumothorax, o Pleural effusion

Chest wall deformitieso Scoliosis and kyphosiso Ank spon

Neuromuscularo Polymyosistiso ALSo Phrenic nerve paresiso Guillain barre syndromeo Myasthenia gravis and eaton-lamberts

CVSo CHFo Mitral stenosiso Severe anemia