Multi-component dressing for treating wounds of the human or animal body using a reduced pressure

• US 7,775,998 B2
• Filed: 11/02/2005
• Issued: 08/17/2010
• Est. Priority Date: 11/02/2004
• Status: Active Grant

• Current Assignee: BSN Medical GmbH (Essity AB)
• Original Assignee: Birgit Riesinger
• Inventors: Riesinger, Birgit
• Primary Examiner(s): Lewis; Kim M
• Application Number:
  US11/666,848
• Publication Number:
  US 20080004559A1
• Time in Patent Office: 1,749 Days
• Field of Search: 602/43, 602/46, 602/48, 602/2, 604/289, 604/290, 604304-308
• US Class Current: 602/2
• 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 13/0209 comprising superabsorbent material
• CPC Class Codes: A61F 13/025 having a special distribution arrangement of the adhesive
• 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 2013/00153 coloured or with decoration pattern or printing
• CPC Class Codes: A61F 2013/00174 possibility of applying pressure
• CPC Class Codes: A61F 2013/00182 with transparent part
• CPC Class Codes: A61F 2013/00536 for draining or irrigating wounds
• CPC Class Codes: A61F 2013/0054 for deep wounds
• CPC Class Codes: A61F 2013/00561 with adhesive connecting means plasters with a double adhesive layer A61F2013/00421; with cyano-acrylic adhesive A61F2013/00459; adhesives for plasters A61F2013/00655; with absorbent adhesives A61F2013/00757; with permeable adhesive layers A61F2013/00761; different adhesion of different adhesive layers A61F2013/00804; changing the adhesion force with strain value A61F2013/00838
• CPC Class Codes: A61F 2013/00714 adhesives for mucosae
• CPC Class Codes: A61F 2013/00846 with transparent or translucent part
• CPC Class Codes: A61F 2013/00936 metal wound bandages with a metallic layer A61F2013/00234
• CPC Class Codes: A61M 1/66 Pre-evacuated rigid containers, e.g. Redon bottles
• CPC Class Codes: A61M 1/67 Containers incorporating a piston-type member to create suction, e.g. syringes cupping glasses A61M1/08; with a flexible member creating suction A61M1/68
• CPC Class Codes: A61M 1/964 having venting means on or near the dressing
• CPC Class Codes: A61M 1/985 the dressing itself forming the collection container

Abstract

A multi-component dressing (100) for treating wounds of the human or animal body, using a reduced pressure, comprising a wound-covering element (4) for mounting the dressing (100) at the surface of the skin and the mucous membrane having at least one connecting site (5) through which material in the wound space (10) can be evacuated. The multi-component dressing has super-absorbing polymers, the absorbed wound secretions remaining bound to polymers in the wound space until the latter are removed from the wound space and the polymers, due to their binding capacity, supporting reciprocal synergies with the sub-atmospheric pressures. Wound exudate, promoted by the reduced pressure, is also stored and controlled by polymerized granulates.

Claims

1. A multi-component wound dressing for treating a wound on a human or animal body using a reduced pressure, said dressing comprising a wound covering element adapted to be applied to the surface of the skin to cover the wound, thereby forming a wound space, said wound covering element having at least one connector configured to connect to a pressure reducing device and through which only gases in the wound space can be evacuated,

the improvement wherein

the dressing has super-absorbing polymers which absorb the wound secretions in the wound space;

wherein the absorbed wound secretions, bound to the polymers, remain in the wound space until the polymers are removed; and

wherein the polymers, due to their bonding capacity, support reciprocal synergies with the sub-atmospheric pressures.

2. The multi-component dressing of claim 1, wherein the polymers are selected from the group of sodium polyacrylates.

3. The multi-component dressing of claim 1, wherein the dressing has at least one enveloped absorption body with at least one layer of a textile section that is interspersed with supra-absorbing particles.

4. The multi-component dressing of claim 3, wherein the absorption body is enclosed in a liquid-permeable envelope, which has pores, the size of which essentially does not exceed that of the supra-absorbing particles.

5. The multi-component dressing of claim 4, wherein the absorption body, which is adapted to be placed in the wound space, has an initial volume (V1), which becomes enlarged in the course of the absorption process, and assumes a final volume (V2) with which the wound space and, with that, the respective wound material, can be filled during the swelling process.

6. The multi-component dressing of claim 4, wherein the layer, in plan view of its flat side, has a two-dimensional extent, which is 3% to 90% smaller than that of the envelope when placed flat.

7. The multi-component dressing of claim 3, wherein the material of the absorption body contains an active substance which has an effect on the wound healing process.

8. The multi-component dressing of claim 3, wherein the absorption body is glued to the wound covering element, a periphery being left free at the wound covering element.

9. The multi-component dressing of claim 7, wherein the active substance includes nanocrystalline silver particles.

10. A wound dressing for treating a wound on a human or animal body using a reduced pressure, said dressing comprising:

a wound covering element adapted to be applied to the surface of the skin to cover the wound, thereby forming a sealed wound space, said wound covering element having at least one connector configured to connect to a pressure reducing device and through which only gases in the wound space can be evacuated whereby a sub-atmospheric pressure environment is provided in the wound space,

a pressure reducing device connected to the at least one connector; and

super-absorbing polymers which absorb wound secretions in the wound space;

wherein

the absorbed wound secretions, bound to the polymers, remain in the wound space until the polymers are removed; and

the polymers, due to their bonding capacity together with the sub-atmospheric pressure environment of the wound space, promote movement of secretions to the polymers.