Apparatus for aspirating, irrigating and cleansing wounds

• US 9,205,001 B2
• Filed: 09/12/2014
• Issued: 12/08/2015
• Est. Priority Date: 10/28/2002
• Status: Expired due to Fees

• 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:
  US14/485,633
• Publication Number:
  US 20150080787A1
• Time in Patent Office: 452 Days
• Field of Search: 604/19, 604289-290, 604304-308, 604/543, 604/317, 604/327, 604319-323
• US Class Current: 1/1
• 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 treating a wound, comprising:

a wound dressing comprising;

a backing layer configured to form a closure over the wound; and

an irrigation system, the irrigation system comprising;

a spiral tube member comprising an elongated tubular body extending along a length, wherein the elongated tubular body curves around a center point constantly receding from and circling the center point; and

a plurality of apertures along the length of the spiral tube member wherein the spiral tube member is configured to deliver circulating fluid directly to the wound through the plurality of apertures along its length.

2. The apparatus of claim 1, further comprising an outlet tube configured to connect to the backing layer and draw fluid away from the wound.

3. The apparatus of claim 2, wherein the outlet tube is configured to be mounted to the backing layer at an opening in the backing layer.

4. The apparatus of claim 3, wherein the outlet tube is configured to provide fluid communication between a vacuum pump and the wound dressing.

5. The apparatus of claim 1, wherein the backing layer comprises an adhesive on a periphery of the backing layer, wherein the adhesive is configured to attach the backing layer to skin around the wound.

6. The apparatus of claim 1, further comprising:

a membrane layer comprising a plurality of apertures configured to contact the wound; and

a wound filler.

7. The apparatus of claim 6, wherein a periphery of the backing layer extends beyond and surrounds the membrane layer.

8. The apparatus of claim 1, further comprising a vacuum pump configured to apply negative pressure to the wound dressing.

9. The apparatus of claim 1, further comprising a collection container in fluid communication with the wound dressing and configured to store fluid removed from the wound.

10. The apparatus of claim 9, further comprising a pressure sensor to detect pressure in the collection canister.

11. The apparatus of claim 1, further comprising a reservoir configured to be in fluid communication with the wound dressing and to store fluid to be provided to the wound through the irrigation system.

12. The apparatus of claim 11, wherein the fluid stored in the reservoir comprises medicated fluids.

13. The apparatus of claim 1, further comprising a controller configured to control a vacuum pump.

14. The apparatus of claim 1, further comprising a pressure sensor to detect pressure in the wound.

15. A method of treating a wound, comprising:

applying a wound dressing over a wound comprising;

a backing layer configured to form a closure over the wound; and

an irrigation system, the irrigation system comprising;

a spiral tube member comprising an elongated tubular body extending along a length, wherein the elongated tubular body curves around a center point constantly receding from and circling the center point; and

a plurality of apertures along the length of the spiral tube member;

delivering fluid to the wound through the plurality of apertures of the irrigation system; and

applying negative pressure to at least the wound dressing to facilitate removal of fluid from the wound.

16. The method of claim 15, further comprising drawing fluid away from the wound with a fluid offtake tube connected to the backing layer.

17. The method of claim 16, wherein fluid drawn away from the wound is stored in a collection canister.

18. The method of claim 15, further comprising detecting a pressure in the wound with a pressure sensor at the wound.

19. The method of claim 15, wherein the wound dressing is applied to skin around the wound with an adhesive.

20. The method of claim 15, further comprising delivering medicated fluid to the wound through the plurality of apertures of the irrigation system.