Medical dressings and uses thereof
Inventors
Assignees
Marine Biology & Environmental Technologies LLC • Marine Biology & Environmental Technologies LLC
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Publication Number
US-12232934-B2
Publication Date
2025-02-25
Expiration Date
Abstract
This invention provides compositions and methods of treating subjects with wounds. Compositions include dressings comprising a sheet and an adhesive, wherein the adhesive is adhered to the sheet, and wherein the sheet has channels. In some embodiments, the channels comprise two different classes of channels (e.g. liquid channels and air channels). These dressing can be applied to various kinds of skin injuries and remain affixed, protecting the injury from contaminants and at the same time, allowing exchange of exudates on the proximal (injury) side to the distal side and exchange of topical agents applied from the distal side of the dressing to the wound while also allowing exchange of gasses from the injury to the air and air to the wound.
Core Innovation
The invention relates to a dermatologically acceptable dressing that includes a sheet and a pressure-sensitive adhesive adhered to the sheet. The sheet comprises rayon material and has water permeability, with a proximal side and a distal side, and the dressing includes channels forming a channel zone where the adhesive, the sheet, and the dressing are dermatologically acceptable.
The channels traverse the sheet from the proximal side to the distal side at an angle from 20 degrees to 90 degrees relative to the sheet. The channels are 1 to 160,000 in number per cm2 of distal side surface area and have a diameter of 25 µm to about 10 mm, and the sheet material without the channels consists of specified air permeability and moisture vapor permeability at defined measurement conditions.
The dressing includes a plurality of channel zones and a plurality of non-perforation zones of at least 0.5 cm width running parallel to a periphery measured along the width of the dressing. At least one non-perforation zone is positioned between channel zones.
Claims Coverage
The document includes one independent claim. The independent claim defines the dressing structure around a pressure-sensitive adhesive, a rayon sheet with water-permeable angled through-channels, specified channel count and diameter, defined channel and non-perforation zones, and dermatological acceptability, while also setting baseline permeability characteristics for the rayon sheet without the channels.
Angled through-channels in a dermatologically acceptable pressure-sensitive adhesive rayon dressing
A dressing comprising a pressure-sensitive adhesive adhered to a dermatologically acceptable rayon sheet, wherein the sheet has channels forming a channel zone that traverse the sheet from a proximal side to a distal side at an angle, with a channel angle from 20 degrees to 90 degrees relative to the sheet.
Specified channel density and channel diameter on the distal side
The channels traverse the sheet and are 1 to 160,000 in number per cm2 of the distal side surface area, and have a diameter of 25 µm to about 10 mm.
Permeability-defined rayon sheet material without channels
The sheet material is rayon and the sheet material without the channels consists of an air permeability of 0.01 cm3/s/cm2 to 1000 cm3/s/cm2 and a moisture vapor permeability of at least 500 gms/m2/24 hours when measured at 37 degrees C. and 100% to 10% relative humidity.
Channel zones separated by non-perforation zones running parallel to the periphery
The dressing has a plurality of channel zones and a plurality of non-perforation zones of at least 0.5 cm width running parallel to a periphery measured along the width of the dressing wherein at least one of the non-perforation zones is positioned between channel zones of the plurality of channel zones.
Across the independent claim, the core inventive structure is a dermatologically acceptable, pressure-sensitive adhesive dressing using a rayon sheet with water-permeable angled through-channels at a defined channel angle, with defined channel density and diameter, baseline air and moisture vapor permeability for rayon without channels, and plural channel zones separated by non-perforation zones running parallel to the periphery.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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