Emergency Decompression of Tension Pneumothorax
A 25-year-old man is brought in after a head-on motor vehicle collision. He is unresponsive with a Glasgow Coma Scale score of 8. His neck veins are distended, breath sounds are absent on the right, and percussion there is hyperresonant. Blood pressure is 78/44 mm Hg. Which of the following is the most urgent initial intervention?
- A.Pericardiocentesis
- B.Cervical spine immobilization
- C.Endotracheal intubation
- D.Right needle thoracostomyCorrect
Explanation
Distended neck veins with absent breath sounds and a hyperresonant percussion note on one side is the clinical triad of tension pneumothorax, and it is simultaneously a breathing failure and a circulation failure. Under the ATLS primary survey, immediately life-threatening breathing and circulation problems are treated the moment they are found rather than deferred, and no imaging is required. Needle or finger decompression of the affected hemithorax vents the trapped air, converting a tension pneumothorax into a simple pneumothorax and restoring venous return within seconds, after which a chest tube is placed. Although his Glasgow Coma Scale score of 8 is a clear indication for a definitive airway, intubating first is dangerous because positive pressure ventilation forces more air into the pleural space and can precipitate cardiac arrest. Pericardiocentesis treats tamponade, which would present with distended neck veins but equal breath sounds and a normal percussion note. Cervical spine immobilization is standard precautionary care in blunt trauma but does not treat an immediate threat to life. Decompression is performed at the fifth intercostal space anterior to the mid-axillary line in adults, which is more reliable than the traditional second intercostal space in the mid-clavicular line. Chest tube insertion follows immediately as definitive management.
Why each option
- A.
- Pericardiocentesis targets cardiac tamponade, which presents with distended neck veins but equal breath sounds and normal percussion. It would not relieve pleural pressure.
- B.
- Cervical spine immobilization is routine precautionary care in blunt trauma but treats no immediate threat to life and must not delay decompression.
- C.
- Intubation is indicated for his depressed consciousness but is dangerous before decompression, because positive pressure ventilation worsens the tension.
- D.
- Correct. Needle or finger decompression of the right hemithorax immediately relieves the tension and restores venous return.
Reference: ATLS Advanced Trauma Life Support, 10th ed., American College of Surgeons, 2018, Airway and Thoracic Trauma
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