Unbacked and modifiable tapes and skin dressings
Inventors
Assignees
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Publication Number
US-11944519-B2
Publication Date
2024-04-02
Expiration Date
Abstract
Tapes and methods including an unbacked construction of at least one liquid layer adhesive that has been at least one of dried and cured. Occlusive tissue dressings, tapes and methods including an elastomeric drape and, for backed drapes and some unbacked drapes, a liquid component, at least partially cross-linked at least after one of drying and curing, suitable for application at a dressing-to-skin interface in order to create a substantially air-tight seal. The same or a different liquid component may be applied by a user at a tube-to-dressing interface of an elastomeric drape to create a similar air-tight seal around the tube, if not occlusively sealed during its manufacture. Featured are unbacked tapes, a drape with liquid sealant component, a liquid layered drape with liquid sealant component, and a liquid layered drape.
Core Innovation
The disclosure describes unbacked, planar, viscoelastic multilayer adhesive tape constructions and wound dressings that conform to tissue and provide an occlusive barrier. The construction includes multiple adhesive layers formed from at least two different adhesive formulas that provide skin adhesion, cohesive strength, elasticity, and resistance to pinhole propagation. Following adhesion to tissue via a biocompatible adhesive, the tape is configured for stretch removal without causing tissue damage or pain.
The disclosure further describes kits comprising removable liners, separate cover materials, and liquid-delivered sealants that dry or cure within thirty minutes to form an occlusive tissue seal. These kits seal dressing-to-skin and tube-to-dressing interfaces, including configurations for negative-pressure wound therapy. Documented embodiments include an eight-layer laminate that remains occlusive during five-day in-vitro testing.
Claims Coverage
The claims identify six independent claims covering six inventive features directed to unbacked tissue-adhering tape constructions and related kit configurations.
Unbacked multilayer tape removable by stretching
Claim 1 covers an unbacked, planar, viscoelastic tape construction with at least three adhesive layers formed from at least two different adhesive formulas, including a biocompatible tissue-adhering surface and at least one removable liner, configured for removal from tissue without damage by stretching at a lift angle of 45 degrees or less.
Tissue-covering kit with separate cover material
Claim 36 covers a kit comprising an unbacked, layered, viscoelastic adhesive tape construction with one or more adhesive layers, a biocompatible adhesive, at least one removable liner, and a physically separate cover material to cover a portion of the tape and prevent sticking to other surfaces, removable from tissue by stretching without damage.
Kit for creating an occlusive tissue seal
Claim 47 covers a kit comprising an unbacked, layered, viscoelastic adhesive tape construction, at least one biocompatible adhesive, at least one removable liner, and a container of liquid-delivered sealant that dries or cures within thirty minutes as an occlusive layer over the outer edge, bonding to the tape and surrounding tissue to form an occlusive seal.
Pattern-coated multilayer tape removable by stretching
Claim 54 covers an unbacked, planar tape with at least three viscoelastic adhesive layers, including adhesives derived from different formulas, and a biocompatible adhesive for tissue attachment, wherein the layered construction is a pattern coating removable from tissue without damage by stretching at a lift angle of 45 degrees or less.
Multilayer tissue-adhering tape with removable liner
Claim 59 covers an unbacked, planar tape with at least three adhesive layers, a biocompatible adhesive surface for adhering to tissue, and at least one removable liner, configured for removal from tissue without damage by stretching at a lift angle of 45 degrees or less.
Multilayer tape with different adhesive formulas
Claim 63 covers an unbacked, planar tape with at least three adhesive layers, including adhesives derived from different formulas, a biocompatible tissue-adhering surface, and at least one removable liner, configured for removal without tissue damage by stretching at a lift angle of 45 degrees or less.
The independent claims cover six inventive features directed to stretch-removable unbacked viscoelastic adhesive tapes and related kit systems featuring separate cover materials or liquid-delivered occlusive sealants.
Stated Advantages
The tape construction is removable from the tissue surface without damaging the tissue by stretching.
The separate cover material in the kit prevents the covered portion or second surface of the tape from sticking to other surfaces after application to tissue.
The sealant is capable of forming an occlusive bond between the tape and the surrounding tissue.
The tape construction enables stretch removal with no adhesive left behind.
Documented Applications
Wound dressings that conform to tissue and provide an occlusive barrier.
Negative-pressure wound therapy, including sealing dressing-to-skin and tube-to-dressing interfaces.
A drape kit with liners, a flange, a tube connector, and an optional adhesive patch, including a repositionable flange design.
Adhering the tape construction to a tissue surface, including skin, and subsequently removing it by stretching.
Covering an area of a tissue surface with a tape kit that includes a separate cover material.
Creating an occlusive seal on a tissue surface by applying a sealant over the outer edge of the tape construction.
Adhesive layers suspending an agent, component, or composition containing a pharmaceutical and/or antimicrobial.
Tape-kit arrangements involving a tubular applicator or a tube or catheter positioned through or over the tape.
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