Hemothorax

A collection of blood in the space between the chest wall and the lung (the pleural cavity).

Causes, incidence, and risk factors

The most common cause of hemothorax is chest trauma. Hemothorax can also occur in patients with lung or pleural cancer , or in patients with a defect of the blood clotting mechanism. Hemothorax is also common after thoracic or heart surgery, as well as in patients who suffer pulmonary (lung) infarction (tissue death). In blunt chest trauma, a rib may lacerate lung tissue or an artery, causing blood to collect in the pleural space. In penetrating chest trauma, a weapon such as a knife or bullet lacerates the lung. A large hemothorax is often a cause of shock in the trauma victim. Hemothorax may also be associated with pneumothorax (air trapped in the pleural cavity). Depending upon the amount of blood or air in the pleural cavity, a collapsed lung can lead to respiratory and hemodynamic failure (tension pneumothorax).

Signs and tests

  • A
    • physical examination reveals decreased or absent breath sounds on the affected side. Signs of hemothorax may be seen on the following tests:
  • Chest X-ray
  • Thoracentesis
  • Pleural fluid analysis

    • Treatment

  • The objective of treatment is to stabilize the patient, stop bleeding, and remove blood and air in the pleural space. A chest tube is inserted through the chest wall to drain the blood and air, and it is left in place for several days to re-expand the lung. The cause of the hemothorax should be also treated. However, in trauma patients, depending on the severity of the injury, chest tube drainage is often all that is necessary, and surgery is often not required.

    • Expectations (prognosis)

    The outcome depends upon the underlying cause of the hemothorax.

    Complications

  • Shock
  • Fibrosis or scarring of the pleural membranes

    • Calling your health care provider

    Call 911 for any penetrating or serious blunt injury to the chest, or if chest pain or shortness of breath occur. Go to the emergency room or call the local emergency number (such as 911) if severe chest pain, severe difficulty breathing , absent breathing, and/or other symptoms of hemothorax occur.

    Prevention

    Use safety measures (such as seat belts) to avoid injury. Depending on the cause, a hemothorax may not be preventable.

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