Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 11/2/2025

Management of Hemothorax and Pneumothorax

Key Considerations for Intervention

  • Small primary pneumothoraces with minimal symptoms can be managed with observation alone, with 70-80% resolving without intervention, as recommended by the British Thoracic Society 1
  • Patients with small primary pneumothoraces and minimal symptoms do not require hospital admission and can be discharged with return precautions, according to the British Thoracic Society 1
  • For secondary pneumothoraces, observation is acceptable only for pneumothoraces less than 1 cm depth or isolated apical pneumothoraces in asymptomatic patients, as suggested by the British Thoracic Society 1
  • Simple aspiration is recommended as first-line treatment before considering intercostal chest drainage (ICD) for primary pneumothoraces requiring intervention, as recommended by the British Thoracic Society 2
  • Secondary pneumothoraces greater than 2 cm, particularly in patients over age 50, require ICD, as recommended by the British Thoracic Society 3, 4
  • Any pneumothorax in mechanically ventilated patients requires immediate 24-28F chest tube, although this guideline is from Praxis Medical Insights, an alternative source recommends similar intervention 5
  • Symptomatic pneumothoraces where simple aspiration has failed require ICD, as recommended by the British Thoracic Society 3, 4
  • The rate of air reabsorption in pneumothorax is 1.25-1.8% of hemithorax volume per day, which informs the decision to observe or intervene, as reported by the British Thoracic Society 1