What immediate management steps should I take for a patient suspected of having a tension pneumothorax before emergency services arrive?

Guideline-aligned answer with reasoning, red flags and references. Clinically reviewed by Dr Kola Tytler MBBS CertHE MBA MRCGP.

Posted: 22 August 2025 Guideline-Aligned (High Confidence) Clinically Reviewed
Dr Kola Tytler MBBS CertHE MBA MRCGPClinical Lead • iatroX

For a patient suspected of having a tension pneumothorax before emergency services arrive, the immediate management steps, as outlined in UK guidelines for pre-hospital settings, focus on critical assessment and intervention by trained professionals.

  • Clinical Assessment: A pneumothorax should be diagnosed using clinical assessment for the purpose of triage or intervention .
  • Chest Decompression Criteria: Chest decompression should only be performed if the patient has either haemodynamic instability or severe respiratory compromise .
  • Decompression Method: If chest decompression is necessary and the expertise is available, open thoracostomy should be used instead of needle decompression, followed by a chest drain in patients who are breathing spontaneously .
  • Post-Decompression Observation: After chest decompression, patients should be observed for signs of recurrence of the tension pneumothorax .
  • Open Pneumothorax Management: In patients with an open pneumothorax, cover it with a simple occlusive dressing and observe for the development of a tension pneumothorax .

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