What is the primary function of an occlusive dressing?

The primary function of an occlusive dressing is to create an airtight seal, which is crucial in specific medical situations, particularly in case of penetrating injuries, such as those caused by gunshots or stab wounds. This type of dressing is designed to prevent air from entering a wound, which is vital when dealing with chest injuries that could lead to a pneumothorax or tension pneumothorax. By sealing the wound, it helps to establish a controlled environment that promotes healing and prevents complications like air embolism.

In addition to its role in managing chest wounds, an occlusive dressing can also help keep contaminants and moisture out, which is important for preventing infection. It is specially constructed to adhere securely to the skin and maintain its seal even with movement or changes in pressure, which is essential for effective treatment in emergency situations.