What is hemothorax?

What is hemothorax?

• A. Accumulation of blood in the cavity of lungs
• B. Reduced oxygen in the blood
• C. Shortness of breath that worsens when lying flat
• D. Membrane that surrounds the lungs and lines the thoracic cavity

Answer: (A)

Hemothorax is the accumulation of blood in the pleural space, the thin potential area between the lung surface and the chest wall. After chest trauma or surgery, bleeding into this space can compress the lung and make breathing difficult, sometimes leading to shock if blood loss is significant. Clinically you may hear decreased or absent breath sounds on the affected side and dullness to percussion, and the patient can become tachycardic or hypotensive with larger bleeds. This description precisely matches blood collecting in the pleural space around the lungs. The other options refer to different concepts: reduced oxygen in the blood is hypoxemia, orthopnea is shortness of breath worse when lying flat, and the membrane around the lungs is the pleura.

Hemothorax is the accumulation of blood in the pleural space, the thin potential area between the lung surface and the chest wall. After chest trauma or surgery, bleeding into this space can compress the lung and make breathing difficult, sometimes leading to shock if blood loss is significant. Clinically you may hear decreased or absent breath sounds on the affected side and dullness to percussion, and the patient can become tachycardic or hypotensive with larger bleeds. This description precisely matches blood collecting in the pleural space around the lungs. The other options refer to different concepts: reduced oxygen in the blood is hypoxemia, orthopnea is shortness of breath worse when lying flat, and the membrane around the lungs is the pleura.