How is a "sucking chest wound" defined?

A "sucking chest wound" is defined as an open chest injury that allows air to enter the pleural space. This occurs when there is a breach in the chest wall due to trauma, such as a gunshot or stab wound, which causes a disruption of the negative pressure within the pleural cavity. When this pressure is compromised, air can be drawn into the pleural space, especially during inhalation, leading to complications like pneumothorax, respiratory distress, and potentially life-threatening conditions. Recognizing this type of injury is critical for prompt and effective treatment, often requiring the application of a one-way sucking chest wound dressing to prevent further air ingress while allowing trapped air to escape. Understanding the nature of such an injury is essential for effective emergency medical care in the field.