In a patient with blunt chest trauma, isolated crepitus over the right ribs and unilateral decreased breath sounds, which injury is most likely?

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Multiple Choice

In a patient with blunt chest trauma, isolated crepitus over the right ribs and unilateral decreased breath sounds, which injury is most likely?

Rib fracture findings are being tested here. Palpable crepitus over the ribs points to a chest wall injury from blunt trauma. When a rib is fractured, especially on one side, there’s a high likelihood of bleeding into the pleural space from torn intercostal vessels or lung injury, which results in a hemothorax. The unilateral decrease in breath sounds fits this, because blood in the pleural space dulls and silences the sounds that should be heard on the affected side. Think through how other injuries would present. A tension pneumothorax tends to cause severe distress, rapidly evolving shock, tracheal deviation, and often distended neck veins, with breath sounds reduced but accompanied by signs of high intrathoracic pressure. A simple pneumothorax also reduces breath sounds, but you’d expect hyperresonant percussion and less association with an isolated rib fracture crepitus. Pulmonary contusion can cause decreased breath sounds and hypoxia, but the key clue here is the rib fracture with focal crepitus, which most strongly points to a pleural bleed into the chest cavity. So the combination of rib fracture signs and unilateral reduced breath sounds makes hemothorax the best fit for the described scenario.

Rib fracture findings are being tested here. Palpable crepitus over the ribs points to a chest wall injury from blunt trauma. When a rib is fractured, especially on one side, there’s a high likelihood of bleeding into the pleural space from torn intercostal vessels or lung injury, which results in a hemothorax. The unilateral decrease in breath sounds fits this, because blood in the pleural space dulls and silences the sounds that should be heard on the affected side.

Think through how other injuries would present. A tension pneumothorax tends to cause severe distress, rapidly evolving shock, tracheal deviation, and often distended neck veins, with breath sounds reduced but accompanied by signs of high intrathoracic pressure. A simple pneumothorax also reduces breath sounds, but you’d expect hyperresonant percussion and less association with an isolated rib fracture crepitus. Pulmonary contusion can cause decreased breath sounds and hypoxia, but the key clue here is the rib fracture with focal crepitus, which most strongly points to a pleural bleed into the chest cavity.

So the combination of rib fracture signs and unilateral reduced breath sounds makes hemothorax the best fit for the described scenario.

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