Which injury can present with open wound and air leakage into the chest cavity during inspiration, but is not necessarily associated with a tension physiology?

• A. Sucking chest wound
• B. Open pneumothorax
• C. Hemothorax
• D. Pulmonary contusion

Answer: (B)

Open pneumothorax occurs when air enters the pleural space through a chest wall defect during inspiration. Because the wound opens to the atmosphere, air can move in and out with breathing, so pressure in the pleural space does not have to build up to cause a life‑threatening tension state. This mechanism fits the description of an open wound with air leaking into the chest during inspiration but isn’t inherently a tension pneumothorax unless air becomes trapped and pressure rises. Hemothorax involves blood in the pleural space, and pulmonary contusion is injury to lung tissue itself without a chest wall opening, so they don’t match the described mechanism. A sucking chest wound is a type of open chest wound, but the key concept here is the open pneumothorax mechanism—air leaking into the pleural space through a chest wall defect during inspiration.