Devices for prevention of pressure ulcers
First Claim
1. A support surface for preventing pressure ulcers in a patient, the support surface comprising a multi-layer composite fabric comprising:
- a skin contact layer comprising a woven fabric of synthetic filament yarns woven to provide air permeability and moisture vapor permeability and having a thickness of less than 1 mm, the skin contact layer having an upper, skin contact surface and a bottom surface;
an absorbent middle layer abutting the bottom surface of the skin contact layer, the middle layer comprising a breathable microfiber fabric woven from synthetic fibers having a cross-sectional shape that includes a plurality of voids for generating a capillary effect for moisture transition from an upper surface of the middle layer to a bottom surface of the middle layer, wherein the skin contact layer and the middle layer are stitched together using a stitching pattern that is optimized to produce an open pattern with minimal puckering;
a bottom layer attached to the skin contact layer and the middle layer at a peripheral edge of each layer, the bottom layer comprising a breathable, waterproof fabric having a thickness of less that 1 mm that is woven from synthetic yarn to produce a moisture vapor transfer rate within the range of 5,000 to 20,000 grams per meter squared per 24 hours.
1 Assignment
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Accused Products
Abstract
A support surface, such as an underpad, for preventing pressure sores in a patient is a multi-layer textile assembly having a skin contact layer formed from a fabric of synthetic filament yarns woven to provide air permeability and moisture vapor permeability and having a thickness of less than 1 mm. An absorbent middle layer is formed from a breathable microfiber fabric woven to provide for moisture transition from an upper surface of the middle layer to a bottom surface of the middle layer. The skin contact layer and the middle layer are stitched together using a stitching pattern optimized to produce an open pattern with minimal puckering. A bottom layer is formed from a breathable, waterproof fabric woven from synthetic yarn to produce a moisture vapor transfer rate within the range of 5,000 to 20,000 grams per meter squared per 24 hours. The three layers are attached together around their outer edges.
88 Citations
24 Claims
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1. A support surface for preventing pressure ulcers in a patient, the support surface comprising a multi-layer composite fabric comprising:
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a skin contact layer comprising a woven fabric of synthetic filament yarns woven to provide air permeability and moisture vapor permeability and having a thickness of less than 1 mm, the skin contact layer having an upper, skin contact surface and a bottom surface; an absorbent middle layer abutting the bottom surface of the skin contact layer, the middle layer comprising a breathable microfiber fabric woven from synthetic fibers having a cross-sectional shape that includes a plurality of voids for generating a capillary effect for moisture transition from an upper surface of the middle layer to a bottom surface of the middle layer, wherein the skin contact layer and the middle layer are stitched together using a stitching pattern that is optimized to produce an open pattern with minimal puckering; a bottom layer attached to the skin contact layer and the middle layer at a peripheral edge of each layer, the bottom layer comprising a breathable, waterproof fabric having a thickness of less that 1 mm that is woven from synthetic yarn to produce a moisture vapor transfer rate within the range of 5,000 to 20,000 grams per meter squared per 24 hours. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A support surface for preventing pressure ulcers in a patient, the support surface comprising a multi-layer composite fabric comprising:
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a skin contact layer comprising a woven fabric of nylon-polyester filament yarns woven to provide a pore size of 4 to 10 microns and having a thickness of less than 1 mm, the skin contact layer having an upper, skin contact surface and a bottom surface; an absorbent middle layer abutting the bottom surface of the skin contact layer, the middle layer comprising a breathable microfiber fabric woven from polyester fibers having a cross-sectional shape that includes a plurality of channels for generating a capillary effect for moisture transition from an upper surface of the middle layer to a bottom surface of the middle layer, wherein the skin contact layer and the middle layer are stitched together with a tension and a stitch length that is optimized to produce minimal puckering; a bottom layer attached to the skin contact layer and the middle layer at a peripheral edge of each layer, the bottom layer comprising a breathable, waterproof fabric coated with polyurethane and having a thickness of less that 1 mm that is woven from synthetic yarn to produce a moisture vapor transfer rate within the range of 5,000 to 20,000 grams per meter squared per 24 hours. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification