Pneumothorax
Basics
Description
Description
- Presence of free air in the intrapleural space
- Spontaneous pneumothorax is due to atraumatic rupture of alveolus, bronchiole, or bleb
- Primary spontaneous pneumothorax (2/3 of incidences):
- No underlying pulmonary pathology present
- Rupture of small subpleural cyst or bleb
- Primarily young, healthy patients (20–40 yr old) with tall, thin body habitus
- Risk factors: Smoking, family history, Marfan syndrome, homocystinuria, thoracic endometriosis
- Evidence of possible increased incidence with changes in weather pattern/atmospheric pressure
- Secondary spontaneous pneumothorax from underlying pulmonary pathology (see Etiology)
- Tension pneumothorax:
- Air continues to enter pleural space through bronchoalveolar disruption and becomes trapped via “ball-valve” mechanism
- Intrapleural pressure increases
- Venous return to right heart decreases, resulting in decrease in cardiac output
- Mediastinum shifts toward uninvolved side, mechanically interfering with right atrial filling
- Ventilation compromise and ventilation/perfusion mismatch result in hypoxemia
Etiology
Etiology
- Idiopathic
- Airway disease:
- Chronic obstructive pulmonary disease (COPD)
- Asthma
- Cystic fibrosis
- Infections:
- Necrotizing bacterial pneumonia
- TB
- Fungal pneumonia
- Pneumocystis carinii
- Neoplasm
- Interstitial lung disease:
- Sarcoidosis
- Idiopathic pulmonary fibrosis
- Lymphangiomyomatosis
- Tuberous sclerosis
- Pneumoconioses
- Connective tissue diseases
- Pulmonary infarction
- Endometriosis
- Blunt chest trauma
- Penetrating trauma to neck or trunk
- Iatrogenic:
- Central line placement
- Other vascular access procedures
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Citation
Schaider, Jeffrey J., et al., editors. "Pneumothorax." 5-Minute Emergency Consult, 6th ed., Lippincott Williams & Wilkins, 2020. Emergency Central, emergency.unboundmedicine.com/emergency/view/5-Minute_Emergency_Consult/307236/all/Pneumothorax.
Pneumothorax. In: Schaider JJJ, Barkin RMR, Hayden SRS, et al, eds. 5-Minute Emergency Consult. Lippincott Williams & Wilkins; 2020. https://emergency.unboundmedicine.com/emergency/view/5-Minute_Emergency_Consult/307236/all/Pneumothorax. Accessed November 9, 2024.
Pneumothorax. (2020). In Schaider, J. J., Barkin, R. M., Hayden, S. R., Wolfe, R. E., Barkin, A. Z., Shayne, P., & Rosen, P. (Eds.), 5-Minute Emergency Consult (6th ed.). Lippincott Williams & Wilkins. https://emergency.unboundmedicine.com/emergency/view/5-Minute_Emergency_Consult/307236/all/Pneumothorax
Pneumothorax [Internet]. In: Schaider JJJ, Barkin RMR, Hayden SRS, Wolfe RER, Barkin AZA, Shayne PP, Rosen PP, editors. 5-Minute Emergency Consult. Lippincott Williams & Wilkins; 2020. [cited 2024 November 09]. Available from: https://emergency.unboundmedicine.com/emergency/view/5-Minute_Emergency_Consult/307236/all/Pneumothorax.
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