Which injury involves a direct chest impact causing potential injury to the lung or intercostal vessels from a broken rib?

• A. Rib injury
• B. Hemothorax
• C. Pulmonary contusion
• D. Open pneumothorax

Answer: (A)

Direct chest trauma that breaks a rib can injure structures directly beneath the rib, especially the lung and the intercostal vessels that run along the undersides of the ribs. A fractured rib can have sharp edges that puncture lung tissue or lacerate these vessels, matching the description of injury caused by the broken rib. Hemothorax describes blood in the pleural space, which is a potential consequence but not the initial injury from the broken rib itself. Pulmonary contusion is bruising of lung tissue from blunt force, which can occur with rib fractures but centers on the lung rather than the fracture causing the injury. An open pneumothorax involves a penetrating wound with air entering the pleural space, not simply a rib fracture from blunt impact. So the scenario is best described as a rib injury from a broken rib.