A conformable medical dressing

Patent metadata

Field	Value
Publication number	US-2016015570-A1
Application number	US-201414773956-A
Country	US
Kind code	A1
Filing date	Mar 5, 2014
Priority date	Mar 11, 2013
Publication date	Jan 21, 2016
Grant date	—

Abstract

The disclosed medical dressing is highly flexible and conformable over skin, while maintain strong adhesive securement to skin over extended periods of time. The dressing comprises a backing layer, support material, and a plurality of specifically placed slits in the support material, which allow for stretching and recovery of the backing layer.

First claim

1 . A medical dressing comprising:
a first major surface, second major surface, opposite the first major surface, and a perimeter, wherein the second major surface comprises an adhesive; a backing layer that is elastic; a support material secured to the backing layer that is less elastic than the backing layer, wherein the support material extends adjacent the entire perimeter but is not continuous across the entire dressing; a plurality of slits through the support material, wherein each slit is a long narrow through cut in the support material and wherein each slit is spaced from an adjacent slit.

2 . (canceled)

3 . The medical dressing of claim 1 , wherein the adhesive covers only a portion of the second major surface.

4 . (canceled)

5 . The medical dressing of claim 1 , wherein the backing layer is at the first major surface.

6 . The medical dressing of claim 1 , wherein the support material is at the first major surface.

7 . The medical dressing of claim 1 , wherein the backing layer, (independently) has an elongation to break of at least 200% and the support layer (independently) has an elongation to break of less than 200%.

8 . The medical dressing of claim 1 , wherein the ratio of the modulus at 10% elongation of a second portion without slits to the modulus at 10% elongation of a first portion with slits is at least 2:1.

9 . The medical dressing of claim 8 , where the modulus at 10% elongation of the first portion with slits is less than 2 Newtons.

10 . (canceled)

11 . The medical dressing of claim 1 , wherein the slits are in the support material and backing layer.

12 . (canceled)

13 . The medical dressing of claim 1 , wherein a first portion of the plurality of slits are parallel to one another and a second portion of the plurality of slits are parallel to one another but perpendicular to the first portion of the plurality of slits.

14 . The medical dressing of claim 1 , wherein the plurality of slits are adjacent the perimeter of the medical dressing.

15 . The medical dressing of claim 1 , wherein the plurality of slits directly contact a portion of the perimeter and extend from the perimeter inward to the medical dressing.

16 . The medical dressing of claim 1 , wherein the plurality of slits are only adjacent a portion of the perimeter of the medical dressing directly contacting the perimeter and extending from the perimeter inward to the medical dressing.

17 . The medical dressing of claim 1 , wherein the perimeter forms a dressing area, and wherein the plurality of slits are at a first portion of the dressing area and a second portion of the dressing area is free of slits.

18 . The medical dressing of claim 17 , wherein the first portion of the dressing area comprising the plurality of the slits has a elasticity greater than the second portion of the dressing area that is free of any slits.

19 . The medical dressing of claim 17 , wherein the plurality of slits at the first portion of the dressing area comprise slits extending radially from the first portion of the dressing area.

20 . (canceled)

21 . (canceled)

22 . The medical dressing of claim 1 , wherein each slit has a length that is at least 5 times greater than a width.

23 . (canceled)

24 . The medical dressing of claim 1 , further comprising an absorbent material recessed from the perimeter.

25 . (canceled)

26 . (canceled)

27 . The medical dressing of claim 1 , wherein the backing layer is transparent.

28 . The medical dressing of claim 1 , wherein the backing layer is generally impermeable to liquid and can transmit moisture vapor at a rate of at least 300 g/m 2 /24 hrs at 37° C./100-10% RH.

Assignees

• 3M Innovative Properties Co

Inventors

• Heinecke Steven B
• Peterson Donald G

Classifications

• A61F13/0243

  characterised by the properties of the skin contacting layer, e.g. air-vapor permeability · CPC title

• A61F13/0236 Primary

  characterised by the application/handling support layer · CPC title

• A61F13/023

  wound covering film layers without a fluid retention layer · CPC title