Provision of wound filler

• US 9,801,761 B2
• Filed: 06/02/2015
• Issued: 10/31/2017
• Est. Priority Date: 07/02/2010
• Status: Active Grant

• Current Assignee: Smith & Nephew PLC
• Original Assignee: Smith & Nephew PLC
• Inventors: Hicks, John Kenneth
• Primary Examiner(s): Zalukaeva, Tatyana
• Assistant Examiner(s): Weng, Kai
• Application Number:
  US14/728,950
• Publication Number:
  US 20150335493A1
• Time in Patent Office: 882 Days
• Field of Search: 604313, 604317, 604319, 604543, 604304
• 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 13/00987 Apparatus or processes for manufacturing non-adhesive dressings or bandages
• CPC Class Codes: A61F 13/05 specially adapted for use with sub-pressure or over-pressure therapy, wound drainage or wound irrigation, e.g. for use with negative-pressure wound therapy [NPWT]
• CPC Class Codes: A61F 2013/00357 implanted wound fillings or covers
• CPC Class Codes: A61L 26/0019 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61L 26/0085 Porous materials, e.g. foams or sponges
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 2210/04 Skin

Abstract

A process of manufacturing a wound dressing filler and/or wound dressing.

Claims

1. A solventless system for forming a porous wound filler at a wound site, comprising:

a drape comprising an opening and configured to be secured over a wound cavity to form a seal;

a base component;

a catalyst component;

a releasing agent;

a mixer configured to mix the base component, catalyst component, and releasing agent to form a liquid filler material, the mixer configured to deliver the liquid filler material to the wound cavity; and

wherein the base component and the catalyst component of the liquid filler material are configured to react to form a wound filler comprising;

a solid porous wound filling portion positioned under the drape; and

a removable excess portion positioned outside the wound cavity, wherein the base component and the catalyst component of the liquid foam filler are further configured to react to expand outward to form a porous wound filler and apply an outward force against the wound cavity and the drape to direct the porous wound filler through the aperture to form the removable excess portion without causing the seal to lift away from the wound cavity.

2. The solventless system of claim 1, wherein the base component comprises polydimethylsiloxane.

3. The solventless system of claim 1, wherein the catalyst component comprises platinum.

4. The solventless system of claim 1, wherein the releasing agent comprises hydrogen.

5. The solventless system of claim 1, wherein the drape is gas permeable.

6. The solventless system of claim 1, wherein the solid porous wound filling portion of the wound filler comprises biocompatible foam.

7. The solventless system of claim 6, wherein the solid porous wound filling portion of the wound filler comprises silicon-based foam.

8. The solventless system of claim 6, wherein the solid porous wound filling portion of the wound filler comprises polyurethane based foam.

9. The solventless system of claim 1, wherein the solid porous wound filling portion of the wound filler contacts a surface of the wound.

10. The solventless system of claim 1, wherein the solid porous wound filling portion of the wound filler substantially fills an entire volume of the wound cavity.

11. The solventless system of claim 1, wherein the removable excess portion of the wound filler is semi-solid.

12. The solventless system of claim 1, wherein the removable excess portion of the wound filler is configured to be removable with a cutting implement.

13. A solventless system for forming a porous wound filler at a wound site, comprising:

a drape comprising an opening and configured to be secured over a wound cavity to form a seal;

an injector comprising a nozzle member and configured to inject a filler material through the opening in the drape via the nozzle member;

a liquid filler material contained in the injector and configured to expand outward as the liquid filler material cures to form;

a solid porous wound filling portion positioned under the drape;

a removable excess portion positioned outside the wound cavity, wherein the liquid filler material is further configured to apply an outward force against the wound cavity and the drape as the liquid filler material cures to thereby direct the liquid filler material through the opening to form a removable excess portion positioned outside the wound cavity without causing the seal to lift away from the wound cavity, and;

a suction port configured to be secured over the opening of the drape subsequent to injecting the filler material through the opening of the drape and further configured to fluidicly connect the injected filler material to a source of negative pressure.

14. The apparatus of claim 13, further comprising a source of negative pressure.

15. The apparatus of claim 14, wherein the source of negative pressure comprises a vacuum pump system.

16. A solventless system for forming a porous wound filler at a wound site, comprising:

a wound dressing comprising;

a drape comprising an opening and configured to be secured over a wound cavity to form a seal;

a liquid filler material configured to be injectable under the drape through the opening, the liquid filler material configured to cure into;

a solid wound filling portion configured to substantially fill an entire volume of the wound cavity;

an excess portion positioned outside the wound cavity, wherein the liquid filler material is further configured to apply an outward force against the wound cavity and the drape as the liquid filler material cures to thereby direct the liquid filler material through the opening to form a removable excess portion positioned outside the wound cavity without causing the seal to lift away from the wound cavity, and;

a fluid communication port configured to be locatable over the opening in the drape and to fluidly connect the cured filler material with a source of negative pressure.

17. The apparatus of claim 16, further comprising a source of negative pressure.

18. The apparatus of claim 17, wherein the source of negative pressure comprises a vacuum pump system.

19. The apparatus of claim 16, the liquid filler material further configured to expand outward as the liquid filler material cures.