Device for the treatment of wounds using a vacuum

• US 7,959,624 B2
• Filed: 11/02/2005
• Issued: 06/14/2011
• Est. Priority Date: 11/02/2004
• Status: Active Grant

• Current Assignee: BSN Medical GmbH (Svenska Cellulosa AB SCA)
• Original Assignee: Birgit Riesinger
• Inventors: Riesinger, Birgit
• Primary Examiner(s): Zalukaeva; Tatyana
• Assistant Examiner(s): SU, SUSAN SHAN
• Application Number:
  US11/666,958
• Publication Number:
  US 20080009812A1
• Time in Patent Office: 2,050 Days
• Field of Search: 604/305, 604/306, 604/307, 604/308
• US Class Current: 604/543
• 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
• 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
• 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

The invention relates to a device (100) for treating wounds of the human or animal body using a vacuum and having a gas-tight wound-covering element (4), which, when placed in contact with the body of the patient, forms a wound space (10) between the respective wound and the wound-covering element, at least one connecting site (5.1; 5.2), which is in contact with the wound space (10), an absorption body (2), which is a layer, enclosed in an envelope, of a textile section, interspersed with super-absorbing particles, the envelope being permeable to liquids and having pores, the size of which does not exceed that of the super-absorbing particles. The absorption body (2), which is to be inserted in the wound space (10), has an initial volume, which enlarges in the course of the absorption process, and a final volume, so that, due to the size of the pores of the envelope, the absorbed wound secretions remain within the absorption body (2) and, with that, below the wound-covering element, until the absorption body is removed from the wound space.

Claims

1. Device for treating wounds of a human or animal patient using a vacuum and comprising:

an air-tight wound-covering element, which, when placed in contact with the body of the patient, forms a wound space between the respective wound and the wound-covering element,

at least one connecting site, which is in contact with the wound space and over which the air in the wound space can be evacuated, and

at least one two-dimensional absorption body, which is to be disposed in the wound space underneath the wound covering element,

the improvement wherein

the absorption body is at least one layer of a textile section, which is enclosed in an envelope and interspersed with super-absorbing particles, the envelope being liquid permeable and having pores, the size of which essentially does not exceed that of the super-absorbing particles, the envelope comprising a peripheral overhang which extends along the entire periphery of the envelope,

the absorption body, which is to be inserted in the wound space, has an initial volume (V1), which enlarges in the course of the absorption process and assumes a final volume (V2), such that, due to the size of the pores of the envelope, the absorbed wound secretions remain within the absorption body and, with that, below the wound covering element, until the absorption body is removed from the wound space, and

in plan view, the layer has an area, which is 3% to 90% smaller than that of the envelope when placed flat.

2. The device of claim 1, wherein the absorption body is glued over its whole surface to the wound-covering element, a periphery at the wound-covering element being left free.

3. The device of claim 1, wherein the absorption body, when filled close to its capacity, approaches a circular shape in cross-section.

4. The device of claim 1, wherein the textile section of the absorption body consists of a nonwoven cellulose material.

5. The device of claim 1, wherein the wound-covering element is made of a material that does not shrink when in contact with the body of the patient.

6. The device of claim 1, wherein an external surface on the wound-covering element is capable of supporting an ink print.

7. The device of claim 1, wherein the connecting site has a valve.

8. The device of claim 1, wherein a pressure indicator is integrated in the device.

9. The device of claim 1, wherein the envelope of the absorption body is sewn on by ultrasonic seams.

10. The device of claim 1, wherein the absorption body, at its periphery, has an overhang of enveloping material.

11. The device of claim 1, wherein the absorption body, due to an increase in its weight, mechanically counteracts a hypergranulation of wound tissue over a skin level of the patient and adds to a pressure caused by an aspiration wherein the pressure faces the center of the body of the patient.

12. The device of claim 1, wherein the peripheral overhang extends between a seam and an outermost circumference of the envelope.

13. The device of claim 1, further comprising a liquid-permeable, mucous membrane-compatible protective element, which, when placed in contact with the body of the patient, is disposed on a side of the absorption body opposite to the wound-covering element and, in plan view, is equal in area to the enveloped absorption body.

14. The device of claim 13, wherein at least one of the absorption body and the liquid-permeable protective element is exchanged when the device is in contact with the body of the patient.

15. The device of claim 13, wherein active substances, such as nanocrystalline silver particles, which affect the wound-healing process, are applied to at least one of the material of the absorption body and of the protective element.

16. The device of claim 13, wherein the protective element is film-like.

17. The device of claim 13, wherein the protective element is a section of textile material.

18. The device of claim 13, wherein the protective element comprises a foam material.

19. The device of claim 13, wherein the protective element comprises a loose bed of material pieces underneath the absorption body.

20. The device of claim 1, wherein the connecting site is connected to a hose line.

21. The device of claim 20, wherein a pressure manometer is connected directly to at least one of the connecting site and the hose line.

22. The device of claim 20, wherein at least one of a vacuum bottle and a vacuum pump is connected to the hose line.

23. The device of claim 20, wherein a piston and cylinder arrangement is connected to at least one of the connecting site and the hose line.

24. The device of claim 1, wherein a pressure distributor, contacting the envelope of the absorption body, is disposed below the wound covering element, yet above the enveloped absorption body.

25. The device of claim 24, wherein the pressure distributor is a template of a foam material, which is permeable to gases.

26. The device of claim 24, wherein the pressure distributor has a loop-like or meandering end piece of the suction tube passed through the connecting site, and wherein the end piece defines a distance (A) between the wound-covering element and the enveloped absorption body.