Which type of dressing material is classified as occlusive?

Xeroform is classified as an occlusive dressing material because it creates a barrier that significantly reduces moisture and air exchange. This specific type of dressing contains a petrolatum base, which helps to keep the wound moist while also protecting it from contamination and external irritants. The occlusiveness allows for a more favorable environment for healing, particularly in wounds that need to retain moisture to facilitate tissue regeneration.

In contrast, gauze is a porous material that allows air and moisture to escape, making it non-occlusive. Hydrocolloid dressings do provide some occlusiveness but are primarily used for their ability to absorb exudate and maintain moisture, while cotton is not designed to adhere to wounds and does not act as an occlusive barrier. This distinction helps in understanding the specific applications of different types of dressings in wound care and post-operative management.