What signs strongly suggest a tension pneumothorax in a prehospital patient?

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Multiple Choice

What signs strongly suggest a tension pneumothorax in a prehospital patient?

In tension pneumothorax, air builds up under pressure in the pleural space and compresses the lung as well as the heart and great vessels. That pressure stops blood from returning to the heart, causing a drop in preload and a fall in blood pressure. Because the affected lung is collapsed, breath sounds are reduced or absent on that side. The increasing pressure also pushes the mediastinal structures away from the injured side, which is why tracheal deviation can appear, though it tends to be a late sign. Neck veins become distended because the elevated intrathoracic pressure impedes venous return. So the combination of hypotension, unilateral decreased or absent breath sounds, and neck vein distension (with tracheal shift as a later finding) is the hallmark of a tension pneumothorax in the prehospital setting. By contrast, a hyperresonant chest with clear breath sounds points more to a simple pneumothorax without the hemodynamic collapse, bilateral clear breath sounds with normal vitals suggest no tension, and a chest wall contusion without respiratory distress does not indicate tension physiology.

In tension pneumothorax, air builds up under pressure in the pleural space and compresses the lung as well as the heart and great vessels. That pressure stops blood from returning to the heart, causing a drop in preload and a fall in blood pressure. Because the affected lung is collapsed, breath sounds are reduced or absent on that side. The increasing pressure also pushes the mediastinal structures away from the injured side, which is why tracheal deviation can appear, though it tends to be a late sign. Neck veins become distended because the elevated intrathoracic pressure impedes venous return.

So the combination of hypotension, unilateral decreased or absent breath sounds, and neck vein distension (with tracheal shift as a later finding) is the hallmark of a tension pneumothorax in the prehospital setting. By contrast, a hyperresonant chest with clear breath sounds points more to a simple pneumothorax without the hemodynamic collapse, bilateral clear breath sounds with normal vitals suggest no tension, and a chest wall contusion without respiratory distress does not indicate tension physiology.

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