Dressing
Inventors
Buan, John • Middaugh, Richard L. • Wojciechowski, Timothy • Lash, Thomas E.
Assignees
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Publication Number
US-11666680-B2
Publication Date
2023-06-06
Expiration Date
Abstract
A dressing includes a drape, a pressure-sensitive acrylic-based adhesive on a skin-facing surface of the drape, an island of absorbent material, a silicone gel backing film, and a silicone gel on the silicone gel backing film. The drape is a thin film capable of maintaining a negative pressure underneath the drape upon application of a vacuum. The island of absorbent material has a smaller area than the drape and is applied onto the skin-facing surface of the drape. The silicone gel backing film has a frame shape and a smaller footprint than the drape and a larger footprint than the island of absorbent material.
Core Innovation
A transparent thin-film drape is provided for a negative pressure wound dressing, and the drape maintains a negative pressure underneath the drape upon application of a vacuum. The silicone gel is visible through the transparent drape, and a pressure-sensitive acrylic-based adhesive is placed on a skin-facing surface of the drape to support attachment at a sealed interface under vacuum.
An island of absorbent material is applied onto the skin-facing surface of the drape with a smaller area than the drape, leaving a first margin of adhesive-coated drape around the island. A silicone gel backing film having a frame shape is affixed to the drape by contact with the pressure-sensitive acrylic-based adhesive surrounding the island, leaving a second margin of adhesive-coated drape around the silicone gel backing film. Silicone gel is provided on the silicone gel backing film in at least substantially matching frame shape while leaving the second margin around the silicone gel.
A release liner having a larger area than the drape is arranged to contact the pressure-sensitive acrylic-based adhesive in the second margin of adhesive-coated drape and to contact the silicone gel. The dressing can include a casting sheet arrangement so the drape is cast onto the casting sheet and internal components are made visible through a casting sheet opening. A drape opening can be provided for vacuum connection with an optional air-permeable/liquid-impermeable filter.
Claims Coverage
The independent claims present inventive features for a structural wound dressing, a method of assembling the dressing, and a dressing variant that includes a cast-and-kiss-cut casting sheet for placement. Across the claims, the inventive features emphasize a transparent vacuum-capable drape with visible silicone gel, a skin-facing pressure-sensitive acrylic-based adhesive with defined margins, a smaller absorbent island, a frame-shaped silicone gel backing film with silicone gel, and release liner placement relative to the adhesive and silicone gel.
Transparent vacuum-maintaining drape with visible silicone gel
A drape that is a thin film capable of maintaining a negative pressure underneath the drape upon application of a vacuum, wherein the drape is transparent and the silicone gel is visible through the drape.
Skin-facing pressure-sensitive acrylic-based adhesive with adhesive margins
A pressure-sensitive acrylic-based adhesive on a skin-facing surface of the drape; an island of absorbent material having a smaller area than the drape and applied onto the skin-facing surface of the drape so as to leave a first margin of adhesive-coated drape around the island of absorbent material.
Frame-shaped silicone gel backing film bonded via adhesive leaving a second margin
A silicone gel backing film having a frame shape, the silicone gel backing film being affixed to the drape by being brought in contact with the pressure-sensitive acrylic-based adhesive on the skin-facing surface of the drape surrounding the island of absorbent material and leaving a second margin of adhesive-coated drape around the silicone gel backing film; and a silicone gel on the silicone gel backing film at least substantially matching the frame shape of the silicone gel backing film surrounding the island of absorbent material while leaving the second margin of adhesive-coated drape around the silicone gel.
Release liner larger than the drape contacting adhesive and silicone gel
A release liner having a larger area than the drape, the release liner being in contact with the pressure-sensitive acrylic-based adhesive in the second margin of adhesive-coated drape and in contact with the silicone gel.
Assembling a transparent thin-film drape with a casting sheet hole and adhesive-backed absorbent island
Forming a hole through a casting sheet and a drape, which is a thin transparent film formed on the casting sheet; applying an island of absorbent material onto a skin-facing surface of the drape, wherein the skin-facing surface of the drape has a pressure-sensitive acrylic-based adhesive deposited thereon, leaving a first margin of adhesive-coated drape around the island of absorbent material.
Applying frame-shaped silicone gel backing film to the adhesive leaving a second margin
Applying a silicone gel backing film having a silicone gel deposited thereon onto the pressure-sensitive acrylic-based adhesive on the skin-facing surface of the drape and surrounding the island of absorbent material leaving a second margin of adhesive-coated drape around the silicone gel backing film.
Transparent negative-pressure drape variant with casting sheet kiss cutting for visibility during placement
A drape that is a transparent thin film capable of maintaining a negative pressure underneath the drape upon application of a vacuum; a pressure-sensitive acrylic-based adhesive on a skin-facing surface of the drape; an island of absorbent material having a smaller area than the drape and applied onto the skin-facing surface of the drape so as to leave a first margin of adhesive-coated drape around the island of absorbent material; a silicone gel backing film having a frame shape and surrounding the island of absorbent material, the silicone gel backing film being affixed to the drape so as to leave a second margin of adhesive-coated drape around the silicone gel backing film; a silicone gel on the silicone gel backing film affixed to the skin-facing surface of the drape and surrounding the island of absorbent material while leaving the second margin of adhesive-coated drape around the silicone gel; and a casting sheet on which the drape was cast, the casting sheet being kiss cut to define a casting sheet opening through which the island of absorbent material and the silicone gel are visible during placement of the dressing, and a remainder of the casting sheet being removable from the drape after the drape has been brought in contact with the skin.
The independent claims collectively cover a dressing structure with a transparent negative-pressure thin-film drape, visible silicone gel, and defined adhesive margins around a smaller absorbent island and a frame-shaped silicone gel backing film, with a release liner contacting both the adhesive margin and silicone gel. They also cover assembling such a dressing by forming a hole through a casting sheet and transparent drape, applying the adhesive-backed absorbent island, and applying the silicone gel backing film while leaving adhesive margins, as well as a variant where the drape is cast on a kiss-cut casting sheet to create a casting sheet opening for visibility during placement.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Use with vacuum communication via a drape hole to an oxygen-scavenging reactor in a closed chamber with a relief valve for managing leakage/pressure thresholds within an enclosed volume.
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