Buffered wound dressing materials

A - Human Necessities – 61 – L

Patent

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Details

A61L 15/32 (2006.01) A61L 15/18 (2006.01) A61L 15/20 (2006.01) A61L 15/64 (2006.01) A61L 27/00 (2006.01)

Patent

CA 2246895

The invention provides solid bioabsorbable materials comprising a weak, water-soluble acid buffer system dissolved or dispersed in a protein matrix in an amount of at least 0.1 mmol/g based on the weight of the material. The buffer system comprises a weak, water-soluble, physiologically acceptable acid and a water-soluble, physiologically acceptable conjugate base of a weak acid. The material is preferably used as or in wound dressings in order to maintain wound surfaces at acid pH, preferably pH 3.5 to 6.5 Preferably, the material is a collagen sponge having a solid hydrogen phosphate/dihydrogen phosphate buffer dispersed therein.

Cette invention divulgue des matières bioabsorbables solides, comprenant un système de tampon pour acide faible soluble dans l'eau, dissous ou dispersé dans une matrice de protéine à raison d'au moins 0,1 mmol/g, par rapport au poids de cette matière. Le système de tampon comprend un acide faible, soluble dans l'eau, physiologiquement acceptable, et une base conjuguée d'acide faible, soluble dans l'eau, physiologiquement acceptable. Cette matière est utilisée, de préférence, comme pansement ou dans des pansements, afin de maintenir les surfaces de blessures à un pH acide, d'une valeur allant de préférence de 3,5 à 6,5. De préférence, cette matière est une éponge en collagène dans laquelle est dispersé un tampon solide hydrogénophosphate/dihydrogénophosphate.

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