Silver containing wound dressing
AssigneeConvatec Technologies Inc.
InventorDavid Malcolm Woods
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Abstract
A wound dressing having anti-microbial activity comprises a first fiber capable of bonding with silver (1) cations. The wound dressing comprises a blend of the first fiber to which silver (1) cations are bonded and a second fiber which is substantially free from silver. The wound dressing comprises from 0.01 to 5.0 percent by weight of silver (1) cations, based on the weight of fiber.
Claims19
A wound dressing comprising gel-forming fibres having anti-microbial activity, comprising a first fibre, which is gel-forming and substantially insoluble in water having silver (I) cations bonded thereto and discoloring on exposure to light, and a second fibre, which is gel-forming and substantially free from silver, wherein the wound dressing comprises a uniform blend of the first fibre and the second fibre, said wound dressing comprising from 0.01 to 5.0 percent by weight of silver (I) cations based on a total weight of first and second fibres, whereby discoloration of the blend on exposure to light is lessened compared with discoloration on exposure to light of a batch of the first fibre having a same average amount of the silver (I) cations present as is present in the blend.
A wound dressing comprising gel-forming fibres having anti-microbial activity, comprising a first fibre, which is gel-forming and substantially insoluble in water having silver (I) cations bonded thereto and discoloring on exposure to light, and a second fibre, which is gel-forming and substantially free from silver, wherein the wound dressing consisting essentially of a uniform blend of the first fibre and the second fibre, said wound dressing comprising from 0.01 to 5.0 percent by weight of silver (I) cations based on a total weight of first and second fibres, whereby discoloration of the uniform blend on exposure to light is lessened compared with discoloration on exposure to light of a batch of the first fibre having a same average amount of the silver (I) cations present as is present in the uniform blend.
Dependencies are inferred from the claim text.