What is the purpose of an occlusive dressing?

• A. To prevent air from entering the wound.
• B. To absorb blood and keep the wound dry.
• C. To allow air exchange and ventilation.
• D. To provide cooling.

Answer: (A)

Occlusive dressings are meant to seal the wound so air and contaminants cannot get in, while trapping moisture to create a moist healing environment. This barrier helps protect the wound, reduces evaporation, and supports faster epithelial growth. In chest trauma, that seal also helps prevent air from entering the pleural space, reducing the risk of pneumothorax. They aren’t used to absorb blood, they don’t aim to allow air exchange, and they don’t provide cooling.