Alginate wound dressing and method of making the same

Patent metadata

Field	Value
Publication number	US-10179074-B2
Application number	US-201213549839-A
Country	US
Kind code	B2
Filing date	Jul 16, 2012
Priority date	Jul 16, 2012
Publication date	Jan 15, 2019
Grant date	Jan 15, 2019

Abstract

A method ( 400 ) of manufacturing a wound dressing includes obtaining alginate fibers ( 108 ) and the step ( 404 ) of spraying either the alginate fibers ( 108 ) or a dressing or dressing layer ( 610 ) of the alginate fibers with an aqueous solution ( 801 ) comprising a polysaccharide, which can be carboxymethylcellulose. The step of spraying can occur while the alginate fibers, dressing, or dressing layer are wet. A step ( 405 ) of flash drying can follow to remove the solute of the aqueous solution to leave the polysaccharide along the alginate. The step of spraying can be selective, such that only portions of the dressing layer include the polysaccharide.

First claim

What is claimed is:

1. A wound dressing, comprising:
a dressing layer manufactured from alginate fibers; and
carboxymethylcellulose;
the carboxymethylcellulose is selectively deposited along the dressing layer with a spray of an aqueous solution.

2. The wound dressing of claim 1 , wherein the dressing layer comprises silver ions.

3. The wound dressing of claim 1 , wherein the carboxymethylcellulose is deposited in a repeating pattern along the dressing layer.

4. The wound dressing of claim 1 , wherein the carboxymethylcellulose is deposited only on a wound-covering subportion of the dressing layer.

5. The wound dressing of claim 1 , wherein the dressing layer is non-woven.

6. The wound dressing of claim 1 , the alginate fibers comprising extruded alginate fibers.

7. The wound dressing of claim 1 , wherein the carboxymethylcellulose is about fifteen percent by weight of the one or more alginate fibers.

8. The wound dressing of claim 1 , further comprising a medication.

9. The wound dressing of claim 1 , the alginate fibers flash dried.

10. The wound dressing of claim 1 , the carboxymethylcellulose selectively deposited along the dressing layer with the spray of the aqueous solution while the alginate fibers are wet.

11. The wound dressing of claim 1 , the spray comprising a carboxymethylcellulose concentration of about ten percent.

12. The wound dressing of claim 1 , the spray applied to only selected portions of the wound dressing.

13. The wound dressing of claim 12 , the selected portions comprising wound covering portions of the wound dressing.

Assignees

• Chakravarthy Debashish
• Medline Ind Inc

Inventors

• Chakravarthy Debashish

Classifications

• A61F2013/00229

  with alginate · CPC title

• A61F2013/0091

  with disinfecting or anaesthetics means, e.g. anti-mycrobic · CPC title

• A61F2013/00936

  metal · CPC title

• A61F2013/00748

  with hydrocolloids or superabsorbers · CPC title

• A61F13/00063

  comprising medicaments or additives, e.g. odor control, PH control, debriding, antimicrobic (drug delivery dressings A61K9/70; chemical aspect of the additives A61L15/00) · CPC title