Multi-layer wound dressing
AssigneeJohnson & Johnson Medical, Inc.
InventorPeter Stuart Arnold
Life of this patent
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Abstract
The invention provides wound dressings comprising a molecular filtration membrane having a maximum pore size in the range of from 0.001 .mu.m to 0.5 .mu.m, and preferably in the range of from 0.01 .mu.m to 0.25 .mu.m. The wound dressings may also comprise an absorbent layer atop the molecular filtration membrane and/or a wound contact layer of wound-friendly bioabsorbable material for contacting the wound. In use, the molecular filtration membrane retains high molecular weight biopolymers and wound healing factors at the wound surface while excluding bacteria and allowing rapid egress of wound exudate through the membrane into the absorbent layer.
Claims13
A wound dressing comprising:
- a wound contacting layer comprising a bioabsorbable and hydrophilic polymeric material that forms a gel in contact with wound exudate.
- a liquid permeable molecular filtration membrane, having a maximum pore size in the range of from 0.001 .mu.m to 0.5 .mu.m;
- an absorbent layer overlying the molecular filtration membrane and comprising a pharmaceutical, a wound healing agent, a growth factor or a microbiocide capable of passing through the molecular filtration membrane;
- and
- an outer protective membrane overlying the absorbent layer on the side opposite from the molecular filtration membrane.
Dependencies are inferred from the claim text.