<unk> 
Spontaneous<unk> 
Catamenial<unk> 
Traumatic<unk> 
Iatrogenic<unk> 
Catamenial<unk> 
Iatrogenic<unk> 
Airway/Pulmonary
Bronchial injury
Diaphragmatic trauma
Hemothorax
Pneumomediastinum
Pulmonary contusion
Tracheal injury
Trachobronchial injury
Traumatic<unk> <unk> 
Cardiac/Vascular
Cardiac injury
Blunt cardiac injury
Cardiac contusion
Commotio cordis
Penetrating cardiac injury
Cardiac tamponade
Traumatic aortic transection
Musculoskeletal
Clavicle fracture
Clavicle fracture (peds)
Rib fracture
Flail chest
Scapular fracture
Scapulothoracic dissociation
Sternoclavicular dislocation
Sternum fracture
Thoracic and lumbar fractures and dislocations
Other
Esophageal injury or Perforation
Pneumomediastinum
Pneumopericardium
Traumatic asphyxia
Bronchial injury
Diaphragmatic trauma
Hemothorax
Pneumomediastinum
Pulmonary contusion
Tracheal injury
Trachobronchial injury
Traumatic<unk> <unk> <unk> 
Cardiac injury
Blunt cardiac injury
Cardiac contusion
Commotio cordis
Penetrating cardiac injury
Cardiac tamponade
Traumatic aortic transection
Blunt cardiac injury
Cardiac contusion
Commotio cordis
Penetrating cardiac injury
Cardiac tamponade
Cardiac contusion
Commotio cordis
Clavicle fracture
Clavicle fracture (peds)
Rib fracture
Flail chest
Scapular fracture
Scapulothoracic dissociation
Sternoclavicular dislocation
Sternum fracture
Thoracic and lumbar fractures and dislocations
Clavicle fracture (peds)
Flail chest
Esophageal injury or Perforation
Pneumomediastinum
Pneumopericardium
Traumatic asphyxia
Pulmonary
Airway obstruction
Anaphylaxis
Angioedema
Aspiration
Asthma
Cor pulmonale
Inhalation exposure
Noncardiogenic pulmonary edema
Pneumonia
Pneumocystis Pneumonia (PCP)
Pulmonary embolism
Pulmonary hypertension<unk> 
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<unk> /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<unk> 
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<unk> /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
Spontaneous<unk> 
Thyroid Disease
URI
Tension pneumothorax
Spontaneous pneumothorax
Hemothorax
Catamenial pneumothorax
Chylothorax
Traumatic pneumothorax
Iatrogenic pneumothorax
Pneumopericardium