Wound dressing for use in vacuum therapy
AssigneeConvatec Technologies Inc.
InventorsWayne Bonnefin, Sarah Wroe, Amelia Prentice
Life of this patent
Estimating the term…
Abstract
A wound dressing for use in vacuum wound therapy comprising a wound contact layer which is an open structure comprising a yarn comprising gel-forming filaments or fibres, the structure having a porosity which allows exudate to flow through it.
Claims20
A wound dressing for use in vacuum wound therapy comprising
- a wound contact layer comprising an open structure in a form of a net comprising a spun yarn comprising a blend of gel-forming filaments or fibres and textile fibres, the net having a pore or mesh size from 0.5 mm2 to 5.0 mm2 that allows exudate to flow through the net, wherein the yarn has a linear density of 20 tex to 40 tex, wherein the yarn has a dry tensile strength of at least 10 cN/tex, wherein the textile fibers have an absorbency of between 5 g/g and 10 g/g as measured by the free swell method, and wherein the blend of gel-forming filaments or fibres and textile fibres includes only one type of gel-forming filaments or fibres.
A device for vacuum wound therapy comprising:
- a wound dressing comprising an open structure in a form of a net comprising a spun yarn comprising a blend of gel-forming filaments or fibres and textile fibres, the net having a pore or mesh size from 0.5 mm2 to 5.0 mm2 that allows exudate to flow through the net, wherein the yarn has a linear density of 20 tex to 40 tex, wherein the yarn has a dry tensile strength of at least 10 cN/tex, and wherein the blend of gel-forming filaments or fibres and textile fibres includes only one type of gel-forming filaments or fibres;
- a source of vacuum situated to be separated from a wound bed by the wound dressing;
- and
- a vacuum sealing layer separate from the wound dressing that covers the wound dressing and is adapted to retain relative vacuum in the wound dressing,
- wherein the pore or mesh size of the net facilitates application of strain to tissue through pores or mesh of the net to stimulate tissue growth when a vacuum of at least 0.4 atm is applied by the source of vacuum to the wound dressing such that the relative vacuum is retained in the wound dressing by the vacuum sealing layer.
A wound dressing comprising a wound contact layer comprising an open structure in a form of a net comprising a spun yarn comprising a blend of gel-forming filaments or fibres and textile fibres, the net having a pore or mesh size from 0.5 mm2 to 5.0 mm2 that allows exudate to flow through the net, wherein the yarn has a linear density of 20 tex to 40 tex, wherein the yarn has a dry tensile strength of at least 10 cN/tex, and wherein the blend of gel-forming filaments or fibres and textile fibres includes only one type of gel-forming filaments or fibres.
Dependencies are inferred from the claim text.