Moist wound dressings - types and properties

When choosing the optimal type of dressing for wound treatment, it is important to consider such factors as the amount of wound discharge, the condition of the surrounding tissue, the location, size and depth of the wound, as well as the presence or risk of infection. In medical practice, different types of bandages are used, which may have different properties and principles of action. Here are some of those. Film dressings are semipermeable transparent membranes, usually made of polyurethane, coated with glue. They create a wet environment by limiting water penetration. Foam bandages are made of polyurethane, polyethylene or silicone. They are designed to maintain a moist environment and absorb secretions from the wound. They usually have a hydrophilic layer that is in direct contact with the wound bed. Hydrocolloid dressings contain gel-like matrices of gelatin, pectin, and carboxymethyl cellulose, which are usually attached to a semipermeable film or foam base. They create a moist environment by forming a gel from the wound fluid and maintaining their permeability. Hydrogel dressings consist of hydrophilic polymers such as agarose, alginate, carboxymethyl cellulose or collagen. They are biocompatible and structurally similar to the extracellular matrix. Alginate wound dressings are made from calcium and sodium salts of alginic acid and are a non-woven and non-adhesive structure. The choice of the optimal type of wound dressing should be based on the individual characteristics of the wound and the needs of the patient.