Tension pneumothorax<unk> 
Catamenial pneumothorax
Traumatic pneumothorax
Iatrogenic pneumothorax
Catamenial pneumothorax
Iatrogenic pneumothorax
Pulmonary
Airway obstruction
Anaphylaxis
Angioedema
Aspiration
Asthma
Cor pulmonale
Inhalation exposure
Noncardiogenic pulmonary edema
Pneumonia
Pneumocystis Pneumonia (PCP)
Pulmonary embolism
Pulmonary hypertension
Tension pneumothorax
Idiopathic pulmonary fibrosis acute exacerbation
Cystic fibrosis exacerbation
Cardiac
Cardiac tamponade
Cardiogenic pulmonary edema (CHF)
Myocardial Infarction
Pericarditis
Myocarditis
Other Associated with Normal/↑ Respiratory Effort
Abdominal distension
Anemia
CO Poisoning
Salicylate toxicity
Diabetic ketoacidosis (DKA)
Diaphragm injury
Electrolyte abnormalities
Epiglottitis
Flail chest
Hypotension
Metabolic acidosis
Pneumonia
Pneumothorax/hemothorax
Renal Failure
Sepsis
Toxic ingestion
Other Associated with ↓ Respiratory Effort
Guillain-Barre syndrome
Multiple sclerosis
Myasthenia Gravis
Lambert-Eaton Syndrome
Organophosphate toxicity
Stroke (Main)
Tick paralysis
Airway obstruction
Anaphylaxis
Angioedema
Aspiration
Asthma
Cor pulmonale
Inhalation exposure
Noncardiogenic pulmonary edema
Pneumonia
Pneumocystis Pneumonia (PCP)
Pulmonary embolism
Pulmonary hypertension
Tension pneumothorax
Idiopathic pulmonary fibrosis acute exacerbation
Cystic fibrosis exacerbation
Cardiac tamponade
Cardiogenic pulmonary edema (CHF)
Myocardial Infarction
Pericarditis
Myocarditis
Abdominal distension
Anemia
CO Poisoning
Salicylate toxicity
Diabetic ketoacidosis (DKA)
Diaphragm injury
Electrolyte abnormalities
Epiglottitis
Flail chest
Hypotension
Metabolic acidosis
Pneumonia
Pneumothorax/hemothorax
Renal Failure
Sepsis
Toxic ingestion
Guillain-Barre syndrome
Multiple sclerosis
Myasthenia Gravis
Lambert-Eaton Syndrome
Organophosphate toxicity
Stroke (Main)
Tick paralysis
ALS
Ascites
Uncorrected ASD
Congenital heart disease
COPD exacerbation
Fever
Hyperventilation
Interstitial lung disease
Neoplasm
Obesity
Panic attack
Pleural effusion
Polymyositis
Porphyria
Pregnancy
Rib fracture<unk> 
Thyroid Disease
URI
Spontaneous pneumothorax
Tension pneumothorax
Hemothorax
Catamenial pneumothorax
Traumatic pneumothorax
Chylothorax
Iatrogenic pneumothorax
Lung abscess