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Occult Traumatic Loculated Tension Pneumothorax—A Sonographic Diagnostic Dilemma

Abstract This case outlines a rarely seen disease in prehospital emergency care—namely, a traumatic loculated tension pneumothorax. Prehospital thoracic ultrasound as part of a standard extended focused assessment with sonography in trauma (EFAST) algorithm failed to diagnose this life-threatening injury. We have subsequently added scanning the lateral chest wall in the fifth intercostal space to the algorithm.