Wound, Ostomy and Continence Nurses Society (WOCN) Practice Exam

Which type of sponge in NPWT is preferred for tunneled areas?

1. Black sponge

2. Silver sponge

3. White sponge

4. Foam sponge

The correct answer is: White sponge

The white sponge, also known as a soft foam, is preferred for tunneled areas in Negative Pressure Wound Therapy (NPWT) due to its ability to conform to the irregular shapes and contours of the wound. This type of sponge provides gentle compression and promotes even distribution of negative pressure throughout the wound bed, which is essential in tunneled wounds where depth and irregularity can complicate healing. Additionally, the white sponge has a lower density compared to other types, allowing it to fill the entire tunnel without exerting excessive pressure on the surrounding tissue. This characteristic helps maintain tissue perfusion and reduces the risk of further injury to the wound. The soft nature of the sponge also minimizes discomfort for the patient, promoting better adherence and compliance with therapy. In contrast, other types of sponges, such as black, silver, and foam sponges, may not provide the same level of adaptability to tunneled areas. Black sponges are typically used for more stable, shallow wounds or wounds with significant exudate. Silver sponges have antimicrobial properties and are often chosen for infected wounds but may not be specifically designed for tunneled areas or softer tissues. Foam sponges can be effective but may be less suitable for deep tunneling compared to the specific properties of