Certified Wound Ostomy Nurse (CWON) Practice Test

Which dressing type can provide a protective barrier without the need for pouching?

1. Hydrocolloid

2. Zinc oxide

3. Foam dressing

4. Alginate

The correct answer is: Zinc oxide

The correct choice is zinc oxide. Zinc oxide is a topical barrier used to protect the skin from irritants and moisture. It is commonly utilized in situations such as diaper dermatitis or skin breakdown and can be applied directly to the skin to create a physical barrier. This provides protection without the use of an additional pouching system, making it especially useful in caring for compromised skin. Other dressing types such as hydrocolloids, foam dressings, and alginates serve specific purposes and usually require additional applications or systems. Hydrocolloid dressings are designed to provide moisture and support healing in wounds but are not purely a barrier and may need a pouch when used in certain situations. Foam dressings offer absorption and cushioning but are also not solely used as a barrier without additional coverings. Alginate dressings are excellent for managing exudate but are also not meant for barrier protection without additional dressing systems. Thus, zinc oxide stands out as the primary option for providing a protective barrier on its own.