Wound Dressing Inhibiting Lateral Diffusion of Absorbed Exudate
First Claim
1. A wound dressing comprising:
- a proximal hydrophilic layer fabricated from a first fibrous polymer and configured for placement adjacent to a portion of skin producing exudate to absorb the exudate; and
a hydrophobic layer having a first side in contact with the proximal hydrophilic layer and a second side opposite the first side, the hydrophobic layer comprising a second fibrous polymer including fibers that comprise fibers of poly(caprolactol) and poly(hexamethylene biguanide hydrochloride) in the fibers of poly(caprolactol), the second fibrous polymer configured for receiving the exudate absorbed by the proximal hydrophilic layer and storing the exudate at inter-fiber gaps to inhibit lateral diffusion of the exudate in the wound dressing.
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Accused Products
Abstract
A wound dressing including a hydrophilic layer and a hydrophobic layer is described. The hydrophilic layer absorbs exudate from a wound and the hydrophobic layer absorbs the exudate from the hydrophilic layer and traps the exudate. Because the hydrophilic layer is used adjacent to the wound, the exudate is readily absorbed thereby reducing the risk of maceration and infection of the wound tissue by the exudate. The hydrophobic layer receives the absorbed exudate from the hydrophilic layer and traps the exudate through an interaction that in turn prevents lateral diffusion of the exudate through the bandage to healthy portions of the skin. The hydrophilic and hydrophobic layers are fabricated from polymer fibers that can be spun to include components that facilitate wound healing, such as poly(hexamethylene biguanide) and/or hyaluronic acid.
20 Citations
29 Claims
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1. A wound dressing comprising:
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a proximal hydrophilic layer fabricated from a first fibrous polymer and configured for placement adjacent to a portion of skin producing exudate to absorb the exudate; and a hydrophobic layer having a first side in contact with the proximal hydrophilic layer and a second side opposite the first side, the hydrophobic layer comprising a second fibrous polymer including fibers that comprise fibers of poly(caprolactol) and poly(hexamethylene biguanide hydrochloride) in the fibers of poly(caprolactol), the second fibrous polymer configured for receiving the exudate absorbed by the proximal hydrophilic layer and storing the exudate at inter-fiber gaps to inhibit lateral diffusion of the exudate in the wound dressing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11, 21, 22, 28, 29)
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9. (canceled)
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12-20. -20. (canceled)
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23. A wound dressing comprising:
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a proximal hydrophilic layer fabricated from a first fibrous polymer and configured for placement adjacent to a portion of skin producing exudate to absorb the exudate, the first fibrous polymer of the proximal hydrophilic layer comprising first fibers of poly(ethylene oxide) and second fibers poly(ethylene-co-vinyl alcohol), the first fibers and the second fibers having an interstitial gap size of between 1 micron and 2.5 microns; and a hydrophobic layer in contact with the proximal hydrophilic layer, the hydrophobic layer comprising a second fibrous polymer configured for receiving the exudate absorbed by the proximal hydrophilic layer and storing the exudate at inter-fiber gaps to inhibit lateral diffusion of the exudate in the wound dressing. - View Dependent Claims (24, 25, 26, 27)
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Specification