In pneumothorax, what is the typical direction of tracheal and mediastinal shift?

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Multiple Choice

In pneumothorax, what is the typical direction of tracheal and mediastinal shift?

In a tension pneumothorax, air traps in the pleural space and raises pressure on the affected side. That pressure pushes the mediastinal structures, including the trachea, away from the injured side. So the trachea and mediastinum shift toward the opposite side while the heart and great vessels are displaced, often with reduced venous return and hemodynamic instability. Note that in a simple (non-tension) pneumothorax there is typically little to no mediastinal shift, so the away-from-side shift is a feature specific to tension physiology.

In a tension pneumothorax, air traps in the pleural space and raises pressure on the affected side. That pressure pushes the mediastinal structures, including the trachea, away from the injured side. So the trachea and mediastinum shift toward the opposite side while the heart and great vessels are displaced, often with reduced venous return and hemodynamic instability.

Note that in a simple (non-tension) pneumothorax there is typically little to no mediastinal shift, so the away-from-side shift is a feature specific to tension physiology.

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