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Author: Vanessa Ngan, Staff Writer, 2005.
Synthetic wound dressings originally consisted of two types; gauze-based dressings and paste bandages such as zinc paste bandages. In the mid-1980s the first modern wound dressings were introduced which delivered important characteristics of an ideal wound dressing: moisture keeping and absorbing (e.g. polyurethane foams, hydrocolloids) and moisture keeping and antibacterial (e.g. iodine-containing gels).
During the mid 1990s, synthetic wound dressings expanded into the following groups of products:
Silver containing dressings
No single dressing is suitable for all types of wounds. Often a number of different types of dressings will be used during the healing process of a single wound. Dressings should perform one or more of the following functions:
Synthetic wound dressings can be broadly categorized into the following types.
|Passive products||Traditional dressings that provide cover over the wound, eg gauze and tulle dressings|
|Interactive products||Polymeric films and forms which are mostly transparent, permeable to water vapour and oxygen, non-permeable to bacteria, eg hyaluronic acid, hydrogels, foam dressings|
|Bioactive products||Dressings which deliver substances active in wound healing, eg hydrocolloids, alginates, collagens, chitosan, keratin|
The following table describes some of the many different types of wound dressings and their main properties.
|Polyurethane or silicone foams||
Different types of wounds and the different stages of a healing wound require different dressings or combinations of dressings. The following table shows suitable dressings for particular wound types.
|Wound type||Dressing type|
|Clean, medium-to-high exudate (epithelialising)||
|Clean, dry, low exudate (epithelialising)||
|Clean, exudating (granulating)||
The dressings may require secondary dressings such as absorbent pad and bandages.
Wound dressings can cause problems, including:
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