Film dressing
-Wound dressing categories
Wound dressing might be categorized in several different ways based on composition, form and function .
1-Film dressing
These dressing are transparent adhesive -coated materials that are permeable to gases such as vapor and oxygen ,occurs , but impermeable to bacteria. Film dressings tend to allow accumulation of large volumes of wound exudate beneath the dressing . Film Dressings have been used experimentally with some success to control skin bacteria during surgery .(22) film dressings are designed as surgical drapes , but typically of polymeric films spread with appropriate polysaccharide dressing (5).
2-Biological dressings
Biological dressings are at much earlier stage of development than other dressing types, these dressings are coated with treated collagen, the major application of these material is expected to be for sever burns where they may be regarded as a temporary skin substitute (22) and to serve as anti-microbial barrier layer to prevent the loss of body fluids, proteins and electrolytes.(28)
3-Hydrocolloid dressings
Hydrocolloid dressings are easily removed from the healing wound with out damage to the newly formed granulation tissue and new epidermis of the healing site
