Hydroactive wound dressings
Hydrocolloids have the ability to form a gel by absorbing secretions. The hydrophilic colloid particles absorb the exudate and liquefy to form a viscous gel that binds cell debris, maintain a moist wound and facilitate autolytic debridement by softening slough. The temporary topical hypoxia after the dressing is applied also inhibits colonisation with aerobic bacteria and accelerates angioneogenesis and granulation.
Hydrocolloid dressings are used for wounds that are at the cleansing, granulation or epithelialisation phase. They are particularly suitable for closure of chronic wounds or treating abrasions or burns, blistering and orofacial herpes.
Hydrocolloid dressings are made from a semi-permeable film to which a hydrocolloid matrix made of cellulose or other swellable substances, with additional healing excipients if required, is applied in addition to the adhesive. The backing film is permeable to water but prevents ingress of germs and water from outside.