Bilayered devices for enhanced healing

Patent metadata

Field	Value
Publication number	US-11458042-B2
Application number	US-201615568767-A
Country	US
Kind code	B2
Filing date	Apr 25, 2016
Priority date	Apr 23, 2015
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

Disclosed herein is a multilayered wound dressing comprising a first layer; the first layer including channels that facilitate neovascularization of a wound; and a second layer in contact with the first layer, the second layer having the same or different chemical composition as the first layer; where the second layer comprises at least one surface that has a texture and the direction of the texture is operative to facilitate cell orientation and growth. A method includes forming a first layer of a polymeric material; forming a second layer of the same polymeric material as the first layer on the first layer; and forming a textured surface of the second layer of the same polymeric material as the first layer, the textured surface being operative to facilitate directional cell growth when used in a wound dressing, where the first layer and the second layer are formed using an additive manufacturing process.

First claim

What is claimed is:

1. A multilayered wound dressing comprising: a first layer; the first layer comprising channels that facilitate neovascularization of a wound; wherein the first layer comprises a gel; and a second layer in direct contact with the first layer, the second layer having the same or different chemical composition as the first layer; wherein the second layer comprises at least one surface that has a texture that comprises a plurality of spaced features; wherein each feature has a substantially different geometry than a neighboring feature; the plurality of spaced features arranged in a plurality of groupings, the spaced features within each of the groupings being spaced apart at an average distance of about 10 nanometers to about 200 micrometers; the adjacent groupings of features being spaced from each other to define an intermediate tortuous pathway; wherein a direction of the texture is operative to facilitate cell orientation and growth and wherein the textured surface of the second layer does not contact the first layer.

2. The multilayer wound dressing of claim 1 , wherein the first layer comprises a surface that has a texture that is complementary to a patient's anatomy where the wound is located.

3. The multilayer wound dressing of claim 1 , wherein the first layer and the second layer are biodegradable layers.

4. The multilayer wound dressing of claim 1 , wherein the gel comprises a copper capillary alginate gel.

5. The multilayer wound dressing of claim 4 , wherein the copper capillary alginate gel is stabilized with barium ions.

6. The multilayer wound dressing of claim 4 , wherein the copper capillary alginate gel is stabilized using Cd 2+ , Cu 2+ , Ca 2+ , Ni 2+ , Co 2+ , and Mn 2+ .

7. The multilayer wound dressing of claim 1 , wherein the first layer and the second layer comprise polylactic-glycolic acid (PLGA), poly-caprolactone (PCL), copolymers of polylactic-glycolic acid and poly-caprolactone (PCL-PLGA copolymer), polyhydroxy-butyrate-valerate (PHBV), polyorthoester (POE), polyethylene oxide-butylene terephthalate (PEO-PBTP), poly-D,L-lactic acid-p-dioxanone-polyethylene glycol block copolymer (PLA-DX-PEG) or a combination comprising at least one of the foregoing polymers.

8. The multilayer wound dressing of claim 1 , wherein the first layer and the second layer comprise a copolymer of polyurethane and poly lactic acid or a copolymer of polyurethane and polylactic-glycolic acid.

Assignees

• Univ Florida
• Sharklet Tech Inc

Inventors

• Magin Chelsea Marie
• Brennan Anthony B
• Willenberg Bradley Jay
• Schultz Gregory Scott
• Neale Dylan Burton

Classifications

• A61F13/022

  having more than one layer with different fluid retention characteristics · CPC title

• A61L27/60

  Materials for use in artificial skin · CPC title

• A61L15/425

  Porous materials, e.g. foams or sponges · CPC title

• A61L27/50

  Materials characterised by their function or physical properties {, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials} · CPC title

• A61L15/42

  Use of materials characterised by their function or physical properties (liquid bandages A61L26/00) · CPC title