Non-Adherent Wound Dressings and Related Methods Therefor

• US 20130150764A1
• Filed: 12/09/2011
• Published: 06/13/2013
• Est. Priority Date: 12/09/2011
• Status: Abandoned Application

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Moghe, Ajit K., Patel, Harish A
• Application Number:
  US13/316,028
• Publication Number:
  US 20130150764A1
• Time in Patent Office: Days
• US Class Current: 602/44
• CPC Class Codes: A61F 13/00063 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 Class Codes: A61F 13/01012 being made of natural material, e.g. cellulose-, protein-, collagen-based
• CPC Class Codes: A61F 13/01017 synthetic, e.g. polymer based
• CPC Class Codes: A61F 2013/00217 not adhering to the wound with wax A61F2013/00161
• CPC Class Codes: A61F 2013/00238 characterised by way of knitting or weaving
• CPC Class Codes: A61L 15/28 Polysaccharides or their derivatives A61L15/225 takes precedence
• CPC Class Codes: A61L 15/34 Oils, fats, waxes or natural resins A61L15/225 takes precedence
• CPC Class Codes: A61L 15/42 Use of materials characterised by their function or physical properties liquid bandages A61L26/00
• CPC Class Codes: A61L 15/46 Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria
• CPC Class Codes: A61L 2300/202 with halogen atoms, e.g. triclosan, povidone-iodine
• CPC Class Codes: A61L 2300/404 Biocides, antimicrobial agents, antiseptic agents
• CPC Class Codes: C08L 1/02 Cellulose; Modified cellulose

Abstract

A wound dressing is disclosed. The wound dressing includes an oil emulsion and a substrate including a plurality of first yarns and a plurality of second yarns, wherein the plurality of first yarns includes a plurality of first fibers comprising a cellulosic material and the plurality of second yarns includes a plurality of second fibers comprising a non-adherent polymeric material. In other cases, the substrate can be a woven substrate, a nonwoven substrate, or a knitted substrate of nonadherent polymeric fibers or yarns.

Claims

1. A wound dressing comprising a substrate comprising a plurality of first yarns comprising a cellulosic fiber, and a plurality of second yarns comprising non-adherent polymeric fibers;

and an oil emulsion disposed on at least a portion the substrate.

2. The wound dressing of claim 1, wherein the substrate is a woven fabric including the plurality of first yarns and the plurality of second yarns respectively interwoven in a warp direction and in a weft direction.

3. The wound dressing of claim 1, wherein at least a portion of the plurality of second yarns is comprised of a non-adherent polymeric material selected from the group consisting of polyethylene, polypropylene, polyfluoroethylene, polyfluoropropylene, polyfluoropolyethylene glycol, polytetrafluoroethylene, polyethylene terephthalate, polyethylene naphthalate, polytrimethylene terephthalate, polybutylene terephthalate, and combinations thereof.

4. The wound dressing of claim 1, wherein the cellulosic material comprises about 5% to about 50% by weight of the substrate.

5. The wound dressing of claim 1, wherein the non-adherent polymeric fibers comprises about 50% to about 95% by weight of the substrate.

6. The wound dressing of claim 1, further comprising at least one a bacteriostatic agent and an antibacterial agent.

7. The wound dressing of claim 1, further comprising about 3 wt % bismuth tribromophenate, based on the weight of the wound dressing.

8. A wound dressing comprising a substrate comprised of a polymer selected from the group consisting of polyester, polypropylene, polyethylene, and polytetrafluoroethylene;

and an oil emulsion impregnated into at least a portion of the substrate.

9. The wound dressing of claim 8, wherein the substrate consists essentially of a weft knitted fabric with from about 5 wt % to about 75 wt % petrolatum.

10. The wound dressing of claim 8, wherein the substrate consists essentially of a warp knitted fabric with from about 5 wt % to about 75 wt % petrolatum.

11. The wound dressing of claim 10, further comprising from about 1 wt % to about 5 wt % of at least one of an antibacterial agent and a bacteriostatic agent.

12. The wound dressing of claim 8, wherein the substrate consists essentially of a woven polyester with from about 5 wt % to about 75 wt % petrolatum.

13. A method of preparing a wound dressing, comprising:

providing a substrate comprised of a non-adherent polymer selected from the group consisting of polyester, polypropylene, polyethylene, and polytetrafluoroethylene;

introducing an oil emulsion into the substrate to produce the wound dressing; and

sterilizing the wound dressing.

14. The method of claim 13, wherein providing the substrate comprises preparing a substrate consisting essentially of polyester, and wherein introducing the oil emulsion comprises impregnating petrolatum into the substrate to produce a wound dressing having from about 5 wt % to about 75 wt % petrolatum.

15. The method of claim 13, wherein providing the substrate comprises hydroentangling polyester fibers to produce a nonwoven substrate, and wherein wherein introducing the oil emulsion comprises impregnating petrolatum into the nonwoven substrate to produce a wound dressing having from about 5 wt % to about 75 wt % petrolatum.

16. A method of preparing a wound dressing, comprising:

providing a fabric comprising cellulosic fibers woven with non-adherent polymeric fibers comprised of at least one polymer selected from the group consisting of polyester, polypropylene, polyethylene, and polytetrafluoroethylene;

impregnating an oil emulsion into the fabric to produce the wound dressing; and

sterilizing the wound dressing.

17. The method of claim 16, wherein providing the fabric comprises weaving at least a portion of the non-adherent polymeric fibers, in the weft direction, with at least a portion of the cellulosic fibers, in the warp direction, to produce a woven fabric with at least about 50% by weight of non-adherent polymeric fibers.

18. The method of claim 16, wherein providing the fabric comprises weaving at least a portion of the non-adherent polymeric fibers, in a warp direction, and at least a portion of the cellulosic fibers, in the weft direction, to produce a woven fabric with at least about 50% by weight of non-adherent polymeric fibers.

19. The method of claim 16, further comprising disposing the fabric into a sealable package, and wherein impregnating the oil emulsion comprises introducing petrolatum into the fabric disposed in the sealable package.

20. The method of claim 19, wherein providing the fabric comprises:

weaving the cellulosic fibers with the non-adherent polymeric fibers to produce a woven article;

bleaching the woven article;

tentering the bleached, woven article;

cutting the bleached, woven article to produce a woven fabric; and

folding the woven fabric to produce a gauze.

21. The method of claim 20, wherein folding the woven fabric comprises folding the woven fabric to produce the gauze having any of three plies, four plies, five plies, six plies, eight plies, ten plies, twelve plies, sixteen plies, 24 plies, 32 plies, 48 plies, 50 plies, 144 plies, and 216 plies.

22. The method of claim 16, further comprising introducing into the fabric at least one of a bacteriostatic agent and an antimicrobial agent.

23. The method of claim 16, wherein the non-adherent polymeric fiber is comprised of a material selected from the group consisting of polyethylene, polypropylene, polyfluoroethylene, polyfluoropropylene, polytetrafluoroethylene, polyethylene terephthalate, polyethylene naphthalate, polytrimethylene terephthalate, polybutylene terephthalate, and combinations thereof.