| abstract |
A wound dressing material comprises a solid bioabsorbable substrate dyed with an antioxidant dyestuff. The substrate may comprise collagen, oxidised regenerated cellulose, alginates, chitosans, galactomannans, glycosaminoglycans and mixtures thereof. The dyestuff may be selected from a group consisting of aniline dyes, acridine dyes, thionine dyes, bis-naphthalene dyes, thiazine dyes, azo dyes, anthraquinones and mixtures thereof. The dressing may be for the treatment of ulcers, especially, venous ulcers, decubitus ulcers or diabetic ulcers. The material for the wound dressing may have a free radical acticity in the diphenylpicrylhydrazyl (DPPH) test for antioxidant activity of at least 15%. Also provided is a method of making such materials and wound dressing comprising such materials. |