Advanced First Aid For Survival-Part 3

Penetrating Chest Trauma

Penetrating chest trauma often creates serious or fatal injury because of the vital structures and processes that are housed within the chest cavity. Maintaining adequate pressures within the chest cavity is essential for adequate breathing.

The lungs are surrounded by thin, durable membranes called pleura. The parietal pleura lines the chest wall. The visceral pleura is attached to the surface of the lung. Between the two pleural layers is a small amount of fluid, which serves both as a lubricant and a means to provide surface tension to keep the lungs inflated. A fluid bond between the visceral and parietal pleura creates a steady pull between the two pleural layers, which leads to a constant intrapleural negative pressure.

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