Following trauma, what clinical finding should alert EMS to a possible hemothorax?

• A. Absent breath sounds
• B. Clear lung sounds
• C. Bradycardia
• D. Wheezing

Answer: (A)

The presence of absent breath sounds following trauma is a significant clinical finding that may indicate a hemothorax. A hemothorax occurs when blood accumulates in the pleural space, which can compromise lung function and impede normal respiratory sounds. This accumulation can result from blunt or penetrating trauma that damages blood vessels in the thoracic cavity.

When blood fills the pleural space, it can push against the lung, leading to reduced lung volume and potential collapse of the affected lung. Therefore, when assessing a patient after trauma, if absent or diminished breath sounds are noted on one side of the chest, it raises a strong suspicion of a hemothorax, warranting immediate medical intervention.

In contrast, clear lung sounds generally indicate that there is no fluid, obstruction, or collapse in the lungs or pleural space, making it less suggestive of a hemothorax. Bradycardia, or a slow heart rate, is not typically associated with hemothorax and can result from various other conditions. Wheezing, which is indicative of bronchospasm or airway obstruction, would not be expected in the scenario of a hemothorax. Hence, clinicians should prioritize absent breath sounds in the context of trauma as a key indicator for potential