Apparatus for aspirating, irrigating and cleansing wounds

• US 9,844,474 B2
• Filed: 12/30/2014
• Issued: 12/19/2017
• Est. Priority Date: 10/28/2002
• Status: Active Grant

• Current Assignee: Smith & Nephew PLC
• Original Assignee: Smith & Nephew PLC
• Inventors: Blott, Patrick Lewis, Greener, Bryan, Hartwell, Edward Yerbury, Walker, Tina Michelle, Nicolini, Derek, Lee-Webb, Julian
• Primary Examiner(s): Kidwell, Michele M
• Application Number:
  US14/585,786
• Publication Number:
  US 20150173954A1
• Time in Patent Office: 1,085 Days
• 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 13/05 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 13/512 characterised by its apertures, e.g. perforations
• CPC Class Codes: A61F 2013/00174 possibility of applying pressure
• CPC Class Codes: A61F 2013/00221 biodegradable, non-irritating
• CPC Class Codes: A61F 2013/00536 for draining or irrigating wounds
• CPC Class Codes: A61F 2013/0054 for deep wounds
• CPC Class Codes: A61F 2013/00927 with biological activity, e.g. enzymes for debriding wounds or others, collagen or growth factors
• CPC Class Codes: A61M 1/74 Suction control underwater drainage A61M1/61
• 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 1/85 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 1/96 Suction control thereof
• 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 3/0208 before use
• CPC Class Codes: A61M 3/0212 after use
• 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

Abstract

An apparatus for cleansing wounds in which irrigant fluid from a reservoir connected to a conformable wound dressing and wound exudate from the dressing are recirculated 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. The cleansing means (which may be a single-phase, e.g. microfiltration, system or a two-phase, e.g. dialytic system) 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 dressing and a method of treatment using the apparatus.

Claims

1. An apparatus for treatment of a wound, comprising:

a lower porous film comprising a plurality of apertures, the lower porous film adapted to conform to a shape of the wound, wherein the lower porous film comprises a disc-shaped periphery; and

a plurality of circumferentially-arranged spaces, each space defined by the lower porous film and an upper membrane attached to the lower porous film, wherein each space has an outer periphery adjacent the disc-shaped periphery of the lower porous film and opens in a radially-inward direction toward a center portion of the lower film, and wherein the outer peripheries of each of the plurality of circumferentially-arranged spaces are circumferentially spaced apart around the disc-shaped periphery of the lower porous film;

wherein the lower porous film is sealed to said upper membrane along at least a portion of the outer peripheries of each of the plurality of the circumferentially-arranged spaces.

2. The apparatus of claim 1, further comprising a backing layer capable of forming a relatively fluid tight seal of closure over the wound.

3. The apparatus of claim 2, further comprising a conduit configured to be in fluid communication with a space under the backing layer.

4. The apparatus of claim 2, further comprising a wound filler positionable beneath the backing layer and above the lower porous film.

5. The apparatus of claim 4, wherein the wound filler is conformable to the shape of the wound.

6. The apparatus of claim 2, further comprising a source of negative pressure configured to provide negative pressure to a space beneath the backing layer.

7. The apparatus of claim 1, wherein each of the outer peripheries of the plurality of circumferentially-arranged spaces has a curved shape.

8. The apparatus of claim 1, wherein each of the outer peripheries of the plurality of circumferentially-arranged are separated by portions comprising only the lower porous film.

9. The apparatus of claim 1, comprising four circumferentially-arranged spaces.

10. The apparatus of claim 1, comprising six circumferentially-arranged spaces.

11. The apparatus of claim 1, comprising eight circumferentially-arranged spaces.