Skip to article
Astra

Emergency Medicine

Tension Pneumothorax

Tension pneumothorax is a time-critical clinical diagnosis of respiratory and/or circulatory compromise from pleural air under pressure. Decompress immediately when instability or severe respiratory compromise is present; do not delay for imaging, then provide definitive pleural drainage.

Clinical question: How should physicians recognize and immediately decompress suspected tension pneumothorax without delaying lifesaving treatment?

Clinical emergency

Recognize tension physiology and decompress without imaging delay

The immediate decision is based on physiologic compromise, not radiographic confirmation.

Tension pneumothorax is progressive intrapleural air accumulation that impairs ventilation and venous return, potentially causing rapid cardiopulmonary collapse.ScienceDirectPrehospital decompression of tension pneumothorax: Have we moved the needle?PubMedTension Pneumothorax - StatPearls - NCBI Bookshelf In trauma, ICU, and prehospital populations, reported incidence is approximately 1% to 3%, although the true frequency is uncertain.Wolters KluwerClinical Presentation of Patients With Tension... : Annals of SurgeryScienceDirectPrehospital decompression of tension pneumothorax: Have we moved the needle?

Suspect the diagnosis in a compatible setting—thoracic trauma, positive-pressure ventilation, or iatrogenic pleural injury—with acute respiratory or circulatory deterioration. Hemodynamic instability or severe respiratory compromise should trigger immediate decompression before imaging.PubMedPrehospital management of chest injuries in severely injured patients—a systematic review and clinical practice guideline update - PMCnice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICE Waiting for chest radiography in mechanically ventilated patients with suspected tension pneumothorax has been associated with increased risk of death; major authorities therefore support emergency thoracostomy when suspicion is high.PubMedClinical manifestations of tension pneumothorax: protocol for a systematic review and meta-analysis

Presentation should be interpreted according to ventilatory status rather than a fixed “classic signs” checklist.Wolters KluwerClinical Presentation of Patients With Tension... : Annals of SurgeryPubMedClinical manifestations of tension pneumothorax: protocol for a systematic review and meta-analysis
Clinical contextHigher-yield manifestationsImmediate implication
Spontaneously breathing patientPredominantly respiratory signs and symptoms may predominate; hypotension is less reliable than in ventilated patients.Wolters KluwerClinical Presentation of Patients With Tension... : Annals of SurgeryBMJTension pneumothorax—time for a re-think? | Emergency Medicine JournalEscalating respiratory distress with a compatible mechanism warrants urgent reassessment and decompression if severe compromise develops.nice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICE
Assisted or mechanically ventilated patientHypoxemia, hypotension, and/or cardiac arrest are commonly reported presentations.Wolters KluwerClinical Presentation of Patients With Tension... : Annals of SurgeryAcute deterioration should prompt immediate decompression when tension pneumothorax is suspected; do not wait for radiography.PubMedClinical manifestations of tension pneumothorax: protocol for a systematic review and meta-analysisnice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICE

Bedside diagnosis

Use imaging only when it does not defer required decompression

Imaging clarifies uncertain or stable cases; it must not interrupt emergency treatment.

In an unstable patient with suspected tension pneumothorax, diagnosis is clinical and decompression takes priority over chest radiography or CT.PubMedClinical manifestations of tension pneumothorax: protocol for a systematic review and meta-analysisPubMedTension Pneumothorax - StatPearls - NCBI Bookshelfnice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICE CT is the most definitive imaging modality for pneumothorax when radiography is uncertain, but routine CT is inappropriate for suspected tension physiology.PubMedTension Pneumothorax - StatPearls - NCBI Bookshelf

When the patient is sufficiently stable for testing, chest radiography and point-of-care ultrasound can support the diagnosis. eFAST may augment clinical assessment only when skilled operators and equipment are immediately available and use will not delay transfer or treatment; a negative chest eFAST does not exclude pneumothorax.nice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICE

Absent lung sliding is not specific for pneumothorax: mimics include COPD blebs, consolidation, atelectasis, mainstem intubation, scarring, and interstitial lung disease. In the appropriate setting, absent lung sliding together with a dilated inferior vena cava or mediastinal shift should heighten concern for tension physiology.ScienceDirectUltrasound Findings in Tension Pneumothorax: A Case Report

Testing sequence is determined by physiologic stability, not by the availability of imaging.PubMedClinical manifestations of tension pneumothorax: protocol for a systematic review and meta-analysisPubMedTension Pneumothorax - StatPearls - NCBI Bookshelfnice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICE
Patient stateTesting roleAction
Hemodynamic instability or severe respiratory compromise with suspected tension pneumothoraxDo not obtain imaging before decompression.nice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICEImmediate chest decompression, followed by definitive chest drainage.PubMedTension Pneumothorax - StatPearls - NCBI Bookshelfnice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICE
Stable or responding to resuscitationChest radiography and/or ultrasound may support diagnosis; CT can resolve uncertainty when appropriate.PubMedTension Pneumothorax - StatPearls - NCBI Bookshelfnice org ukTrauma: Service deliveryTreat the identified pneumothorax according to clinical status and reassess for deterioration.PubMedTension Pneumothorax - StatPearls - NCBI BookshelfPubMedAcute Pneumothorax Evaluation and Treatment - NCBI - NIH

Procedure

Choose a rapid decompression method, then secure definitive pleural drainage

The optimal initial technique depends on expertise, access, equipment, and the need for immediate release.

Emergency decompression may be performed with needle decompression, simple/open thoracostomy, or tube thoracostomy. Comparative studies have not established superiority among these approaches.PubMedPrehospital management of chest injuries in severely injured patients—a systematic review and clinical practice guideline update - PMC NICE recommends open thoracostomy rather than needle decompression when expertise is available in the prehospital setting, and in hospital recommends open thoracostomy followed by chest drain placement for tension pneumothorax.nice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICE StatPearls similarly describes immediate needle decompression followed by tube thoracostomy as standard emergency management.PubMedTension Pneumothorax - StatPearls - NCBI Bookshelf

Needle decompression should be understood as a bridge, not definitive treatment. Catheter obstruction, kinking, dislodgement, insufficient intrapleural reach, or ongoing air leak can leave or recreate tension physiology; proceed to tube thoracostomy after initial release and reassess continuously.PubMedTension Pneumothorax - StatPearls - NCBI Bookshelfnice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICEScienceDirectTension Pneumothorax Managed Without Immediate ...

Anatomic and device selection remain debated. In one ultrasound pilot study, 28 of 30 healthy volunteers had a smaller skin-to-pleura distance at the fifth intercostal space along the midaxillary line than at the second intercostal space midclavicular line.ScienceDirectUsing Ultrasound to Determine Optimal Location for Needle Decompression of Tension Pneumothorax: A Pilot Study - ScienceDirect CT-based analyses cited in that study estimated lower anticipated failure at the fifth intercostal space midaxillary line than the second intercostal space midclavicular line, but available evidence is heterogeneous and primarily based on anatomic measurements rather than clinical outcomes.ScienceDirectUsing Ultrasound to Determine Optimal Location for Needle Decompression of Tension Pneumothorax: A Pilot Study - ScienceDirectScienceDirectPrehospital decompression of tension pneumothorax: Have we moved the needle?PubMedMeta-analysis of the optimal needle length and decompression site for tension pneumothorax and consensus recommendations on current ATLS and ETC guidelines

Initial decompression options and their practical role in suspected tension pneumothorax.PubMedPrehospital management of chest injuries in severely injured patients—a systematic review and clinical practice guideline update - PMCPubMedTension Pneumothorax - StatPearls - NCBI Bookshelfnice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICE
MethodRoleKey limitation or next step
Needle decompressionRapid temporizing release when immediate thoracostomy is not feasible.PubMedTension Pneumothorax - StatPearls - NCBI Bookshelfnice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICEFailure may result from inadequate catheter length or other device limitations; follow with definitive chest drainage.ScienceDirectUsing Ultrasound to Determine Optimal Location for Needle Decompression of Tension Pneumothorax: A Pilot Study - ScienceDirectPubMedTension Pneumothorax - StatPearls - NCBI Bookshelf
Open or finger thoracostomyImmediate pleural decompression when expertise is available; recommended by NICE over needle decompression in specified trauma settings.nice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICERequires trained operators and must be followed by chest drain placement for definitive management.nice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICE
Tube thoracostomyDefinitive drainage after emergency decompression.PubMedTension Pneumothorax - StatPearls - NCBI Bookshelfnice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICEMonitor for recurrent tension physiology and procedural complications.PubMedTension Pneumothorax - StatPearls - NCBI Bookshelfnice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICE

Needle-site evidence and limitations

Chest-wall thickness varies substantially. A standard 4.4-cm angiocatheter was projected to fail in 50% of one CT-based population at the second intercostal space midclavicular line.ScienceDirectUsing Ultrasound to Determine Optimal Location for Needle Decompression of Tension Pneumothorax: A Pilot Study - ScienceDirect An abstract of 141 adults found BMI greater than 30 associated with increased odds of anticipated failure using a 5-cm catheter, reinforcing the need to consider body habitus and available catheter length.annemergmedYMEM_v70_i4_sS_COVER.indd

Monitoring

Reassess immediately for failed decompression, recurrence, and competing causes of collapse

Clinical response—not the procedure itself—confirms that tension physiology has been addressed.

Following any decompression, reassess oxygenation, ventilation, blood pressure, chest findings, and overall trajectory immediately. NICE specifically recommends observation for recurrent tension pneumothorax after chest decompression.nice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICE Persistent deterioration after a needle attempt should be treated as possible unsuccessful decompression, ongoing leak, malposition, or an alternative/additional cause of shock or hypoxemia; establish definitive drainage without delay when tension physiology persists.PubMedTension Pneumothorax - StatPearls - NCBI BookshelfScienceDirectTension Pneumothorax Managed Without Immediate ...

Tube thoracostomy and the underlying injury can produce complications, including pulmonary injury and recurrent tension physiology. Ongoing monitoring after stabilization is therefore necessary.PubMedTension Pneumothorax - StatPearls - NCBI Bookshelf

Common questions

Can a normotensive patient have tension pneumothorax?

Yes. In spontaneously breathing patients, respiratory signs and symptoms may predominate, while hypotension is relatively uncommon and less sensitive than in mechanically ventilated patients. Clinical deterioration and severe respiratory compromise should drive intervention.BMJTension pneumothorax—time for a re-think? | Emergency Medicine JournalWolters KluwerClinical Presentation of Patients With Tension... : Annals of Surgerynice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICE

Should point-of-care ultrasound delay decompression?

No. In suspected tension pneumothorax with hemodynamic instability or severe respiratory compromise, decompress before imaging. Ultrasound may augment assessment only when immediately available and non-delaying; a negative eFAST does not exclude pneumothorax.nice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICE

Is needle decompression definitive treatment?

No. Needle decompression is an emergency temporizing method. Definitive management requires chest drainage, and patients require observation for recurrent tension physiology after decompression.PubMedTension Pneumothorax - StatPearls - NCBI Bookshelfnice org ukRecommendations | Major trauma: assessment and initial management | Guidance | NICE

What is the preferred needle decompression site?

No single site is conclusively supported by clinical-outcome evidence. Studies suggest the fifth intercostal space near the midaxillary line often has a shorter chest-wall distance than the second intercostal midclavicular site, but evidence is heterogeneous and patient anatomy, laterality, equipment, and local protocol matter.ScienceDirectUsing Ultrasound to Determine Optimal Location for Needle Decompression of Tension Pneumothorax: A Pilot Study - ScienceDirectScienceDirectPrehospital decompression of tension pneumothorax: Have we moved the needle?PubMedMeta-analysis of the optimal needle length and decompression site for tension pneumothorax and consensus recommendations on current ATLS and ETC guidelines

References

  1. Tension pneumothorax—time for a re-think? | Emergency Medicine Journalemj.bmj.com · emj.bmj.com
  2. Pneumothorax: An update on clinical spectrum, diagnosis ...www.sciencedirect.com · www.sciencedirect.com
  3. Clinical Presentation of Patients With Tension... : Annals of Surgeryjournals.lww.com · journals.lww.com
  4. Ultrasound Findings in Tension Pneumothorax: A Case Reportwww.sciencedirect.com · www.sciencedirect.com
  5. Using Ultrasound to Determine Optimal Location for Needle Decompression of Tension Pneumothorax: A Pilot Study - ScienceDirectwww.sciencedirect.com · www.sciencedirect.com
  6. Prehospital decompression of tension pneumothorax: Have we moved the needle?www.sciencedirect.com · www.sciencedirect.com
  7. Finger Thoracostomy for Tension Pneumothoraxjournals.lww.com · journals.lww.com
  8. Prehospital management of chest injuries in severely injured patients—a systematic review and clinical practice guideline update - PMCpmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
  9. Clinical manifestations of tension pneumothorax: protocol for a systematic review and meta-analysispmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
  10. New strategies in the management of pneumothorax - PMCpmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
  11. Meta-analysis of the optimal needle length and decompression site for tension pneumothorax and consensus recommendations on current ATLS and ETC guidelinespmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
  12. Tension Pneumothorax - StatPearls - NCBI Bookshelfwww.ncbi.nlm.nih.gov · www.ncbi.nlm.nih.gov
  13. Spontaneous Pneumothorax - StatPearls - NCBI Bookshelf - NIHwww.ncbi.nlm.nih.gov · www.ncbi.nlm.nih.gov
  14. Acute Pneumothorax Evaluation and Treatment - NCBI - NIHwww.ncbi.nlm.nih.gov · www.ncbi.nlm.nih.gov
  15. EMS Pneumothorax Identification Without Ancillary Testing - StatPearls - NCBI Bookshelfwww.ncbi.nlm.nih.gov · www.ncbi.nlm.nih.gov
  16. Research Forum Educational Program 2017www.annemergmed.com · www.annemergmed.com
  17. Recommendations | Major trauma: assessment and initial management | Guidance | NICEwww.nice.org.uk · www.nice.org.uk
  18. Major trauma: assessment and initial manaement DRAFTwww.nice.org.uk · www.nice.org.uk
  19. Major traumawww.nice.org.uk · www.nice.org.uk
  20. Trauma: Service deliverywww.nice.org.uk · www.nice.org.uk
  21. Emergency Ultrasound Imaging Criteria Compendiumwww.annemergmed.com · www.annemergmed.com
  22. YMEM_v70_i4_sS_COVER.inddwww.annemergmed.com · www.annemergmed.com
  23. [Prehospital treatment of tension pneumothorax in children- ...pubmed.ncbi.nlm.nih.gov · pubmed.ncbi.nlm.nih.gov
  24. Tension Pneumothorax Managed Without Immediate ...www.sciencedirect.com · www.sciencedirect.com