WOUND CLEANSING APPARATUS IN-SITU

• US 20100298793A1
• Filed: 08/02/2010
• Published: 11/25/2010
• Est. Priority Date: 10/28/2003
• Status: Active Grant

• Current Assignee: Bryan Greener, Derek Nicolini, Edward Yerbury Hartwell, Julian Lee-Webb, Patrick Lewis Blott
• Original Assignee: Bryan Greener, Derek Nicolini, Edward Yerbury Hartwell, Julian Lee-Webb, Patrick Lewis Blott
• Inventors: Hartwell, Edward Yerbury, Lee-Webb, Julian, Nicolini, Derek, Blott, Patrick Lewis, Greener, Bryan
• Granted Patent: US 8,080,702 B2
• Time in Patent Office: Days
• US Class Current: 604/319
• CPC Class Codes: A61F 13/00068 specially adapted for application or removal of fluid, e.g. irrigation or drainage of wounds, under-pressure wound-therapy A61F13/0216 takes precedence; drainage appliances for wounds in general A61M27/00
• CPC Class Codes: A61F 13/0206 with absorbent fibrous layers, e.g. woven or non-woven absorbent pads or island dressings
• CPC Class Codes: A61F 13/0213 the fluid retention member being a layer of hydrocolloid, gel forming material
• CPC Class Codes: A61F 13/0259 characterised by the release liner covering the skin adhering layer
• 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: A61M 1/75 Intermittent or pulsating suction A61M1/63, A61M1/772 take precedence
• CPC Class Codes: A61M 1/77 Suction-irrigation systems aspiration tips supplying fluids A61M1/85; specific for negative pressure wound therapy A61M1/92; combined with tracheal tubes A61M16/0463
• CPC Class Codes: A61M 1/772 operating alternately
• CPC Class Codes: A61M 1/81 Piston pumps, e.g. syringes
• CPC Class Codes: A61M 1/82 Membrane pumps, e.g. bulbs
• CPC Class Codes: A61M 1/85 with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants for negative pressure wound therapy A61M1/92, A61M1/94; combined with tracheal tubes A61M16/0463; dental instruments with combined rinsing and aspirating A61C17/0208
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 1/916 specially adapted for deep wounds
• CPC Class Codes: A61M 1/92 with liquid supply means
• CPC Class Codes: A61M 1/962 having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction
• CPC Class Codes: A61M 1/985 the dressing itself forming the collection container
• CPC Class Codes: A61M 2205/075 Bulb type
• CPC Class Codes: A61M 2205/106 reciprocating
• CPC Class Codes: A61M 2205/7518 bacterial
• CPC Class Codes: A61M 2205/8206 : battery-operated
• CPC Class Codes: A61M 27/00 : Drainage appliance for wounds or the like , i.e. wound drains, implanted drains negative pressure wound therapy devices A61M1/90; implements for holding wound open A61B17/02 ; middle ear drainage A61F11/202
• CPC Class Codes: A61M 3/0216 : Pressure
• CPC Class Codes: A61M 3/022 : Volume; Flow rate
• CPC Class Codes: A61M 3/0229 : Devices operating in a closed circuit, i.e. recycling the irrigating fluid
• CPC Class Codes: A61M 35/30 : Gas therapy for therapeutic treatment of the skin
• CPC Class Codes: Y10T 29/49826 : Assembling or joining

Abstract

An apparatus for cleansing wounds, in which wound exudate is removed from a wound bed and selectively cleansed and returned to the wound. The cleansing means removes materials deleterious to wound healing, and the cleansed fluid, still containing materials that are beneficial in promoting wound healing, is returned to the wound bed. The associated wound dressing and cleansing means are conformable to the wound, and may have irrigant fluid circulated from a reservoir by a device for moving fluid through a flow path which passes through the dressing and a means for fluid cleansing and back to the dressing.

Claims

1. (canceled)

2. (canceled)

3. (canceled)

4. (canceled)

5. (canceled)

6. (canceled)

7. (canceled)

8. (canceled)

9. (canceled)

10. (canceled)

11. A wound dressing apparatus, which comprises:

a wound dressing including a backing layer for positioning over a wound area; and

a negative pressure system comprising;

a miniature pump for applying negative pressure to the wound dressing to move wound exudate from the wound area, the miniature pump being integral with the dressing; and

a pressure control device configured to control or vary the pressure under the backing layer applied by the pump in response to a pressure detected underneath the backing layer.

12. The wound dressing apparatus of claim 11, wherein the pump is adapted to apply negative pressure of up to 114 mmHg.

13. The wound dressing apparatus of claim 11, wherein the pump is adapted to apply negative pressure of up to 380 mmHg.

14. The wound dressing apparatus of claim 11, wherein the pump includes a battery for powering the pump, the battery adapted to be mounted to the backing layer.

15. The wound dressing apparatus of claim 11, wherein the wound dressing comprises:

a film positionable adjacent to the wound area, an absorbent member positioned adjacent the film, and a top member.

16. The wound dressing apparatus of claim 11, wherein the micropump is mounted to the backing layer above the top member.

17. The wound dressing apparatus of claim 15, further comprising an adhesive film, the adhesive film adapted to secure the wound dressing in place and to provide a fluid-tight seal between the wound dressing and the wound area.

18. The wound dressing apparatus of claim 15, further comprising a chamber including at least one of medicaments, anti-infectives, anti-inflammatory agents, anti-oxidants, protease inhibitors, vitamins, ion exchangers, and pH adjusting agents.

19. The wound dressing apparatus of claim 15, wherein the absorbent member comprises a material selected from the group consisting of foams, hydrophilic polymeric materials, and hydrophobic materials.

20. The wound dressing apparatus of claim 15, wherein the absorbent member includes at least one of medicaments, anti-infectives, anti-inflammatory agents, anti-oxidants, protease inhibitors, vitamins, ion exchangers, and pH adjusting agents.

21. The wound dressing apparatus of claim 11, wherein the backing layer comprises a transparent or translucent material.

22. The wound dressing apparatus of claim 11, wherein the wound dressing includes a bleed valve adapted to respond to a degree of pressure in the wound dressing.

23. The wound dressing apparatus of claim 11, wherein the wound dressing includes a bleed valve adapted to respond to a degree of exudate build-up in the wound dressing.

24. A wound dressing apparatus, comprising:

a wound dressing including an absorbent member positionable relative to a wound area, the absorbent member being disposed underneath a backing layer; and

a negative pressure system mounted on the wound dressing, the negative pressure system including;

a miniature pump for applying negative pressure to the wound area to facilitate removal of wound exudate from the wound area,

the portable pump being integral with the wound dressing,

a pressure control device configured to control or vary the pressure under the backing layer applied by the pump in response to a pressure detected underneath the backing layer.

25. The wound dressing apparatus of claim 24, wherein the pump includes a battery for powering the pump.