Negative pressure wound therapy dressing system

• US 9,950,100 B2
• Filed: 05/19/2017
• Issued: 04/24/2018
• Est. Priority Date: 04/28/2004
• Status: Active Grant

• Current Assignee: Smith & Nephew PLC
• Original Assignee: Smith & Nephew PLC
• Inventors: Blott, Patrick Lewis, Hartwell, Edward Yerbury, Lee-Webb, Julian, Nicolini, Derek
• Primary Examiner(s): SU, SUSAN SHAN
• Application Number:
  US15/600,365
• Publication Number:
  US 20170266356A1
• Time in Patent Office: 340 Days
• Field of Search: 604304-308
• 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: A61M 1/74 Suction control underwater drainage A61M1/61
• CPC Class Codes: A61M 1/75 Intermittent or pulsating suction A61M1/63, A61M1/772 take precedence
• 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 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 1/964 having venting means on or near the dressing
• 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 35/00 Devices for applying media, e.g. remedies, on the human body devices for handling toiletry or cosmetic substances A45D; absorbent pads, e.g. swabs, A61F13/15

Abstract

A dressing (2) and an apparatus (1) comprising the dressing, for cleansing the wounds (5) in which an irrigant fluid from a reservoir (12) connected to a conformable would dressing and would exudate from the dressing are moved by a device (18) (which may be a single pump or two pumps) for moving fluid through a flow Path (6, 7, 9, 10) which passes through the dressing with a means for providing simultaneous aspiration and irrigation of the wound, to provide a desired balance of fluid at a controlled nominal flow rate that removes materials deleterious to wound healing, while distributing materials that are beneficial in promoting would healing over the wound bed.

Claims

1. A negative pressure wound therapy dressing system comprising:

a substantially conformable wound filler configured to be positioned in a wound;

a backing layer configured to be positioned over the wound filler to provide a substantially fluid tight seal over the wound;

a first aperture configured to be in fluid communication with a negative pressure source configured to aspirate fluid from the wound;

a fluid aspiration manifold comprising a plurality of flow channels in fluid communication with the first aperture, the plurality of flow channels radially extending from the first aperture;

a second aperture configured to be in fluid communication with an irrigation source configured to provide irrigant to the wound; and

a third aperture configured to be in fluid communication with a pressure sensor configured to measure pressure at the wound,

wherein each of the first, second, and third apertures are separate from one another.

2. The system of claim 1, wherein:

the first aperture is configured to be fluidically connected to the source of negative pressure via a first tube, the second aperture is configured to be fluidically connected to the irrigation source via a second tube, and the third aperture is configured to be fluidically connected to the pressure sensor via a third tube, and

each of the first, second, and third tubes are separate from one another.

3. The system of claim 1, further comprising a boss configured to be fluidically connected to the negative pressure source and to the irrigation source, the boss comprising the first, second, and third apertures.

4. The system of claim 3, wherein the boss is circular.

5. The system of claim 1, further comprising a first boss and a second boss, the first boss and the second boss including the first, second, and third apertures.

6. The system of claim 5, wherein the first boss is circular.

7. The system of claim 1, wherein a measurement of pressure at the wound enables control of operation of at least one of the negative pressure source or the irrigation source.

8. The system of claim 1, wherein the negative pressure source comprises a first pump and the irrigation source comprises a second pump.

9. The system of claim 8, wherein the first pump is configured to cycle negative pressure.

10. The system of claim 1, wherein the wound filler comprises foam.

11. A kit comprising the system of claim 1 in combination with a negative pressure wound therapy device including the negative pressure source and the irrigation source.

12. The kit of claim 11, wherein the device is configured to control operation of at least one of the negative pressure source or the irrigation source based on measured pressure at the wound.

13. The kit of claim 11 further comprising a canister configured to store fluid aspirated from the wound.

14. A method of controlling a negative pressure wound therapy system, the method comprising:

applying negative pressure through a first aperture of the system including a substantially conformable wound filler configured to be positioned in a wound and a backing layer configured to be positioned over the wound filler to provide a substantially fluid tight seal over the wound, the first aperture being in fluid communication with a fluid aspiration manifold comprising a plurality of flow channels radially extending from the first aperture;

providing irrigant through a second aperture of the system; and

measuring pressure through a third aperture of the system,

wherein each of the first, second, and third apertures are separate from one another.

15. The method of claim 14, wherein the first aperture is configured to be fluidically connected to the source of negative pressure via a first tube, the second aperture is configured to be fluidically connected to the irrigation source via a second tube, and the third aperture is configured to be fluidically connected to the pressure sensor via a third tube, and wherein each of the first, second, and third tubes are separate from one another.

16. The method of claim 14, wherein the system further comprises a boss attached to the backing layer, and wherein the first, second, and third apertures are formed in the boss.

17. The method of claim 16, wherein the boss is circular.

18. The method of claim 14, wherein the system further comprises first and second bosses, the first boss attached to the backing layer, and wherein the first, second, and third apertures are formed in the first and second bosses.

19. The method of claim 17, wherein the first boss is circular.

20. The method of claim 18, further comprising controlling operation of at least one of the negative pressure source or the irrigation source based on a measurement of pressure at the wound.

21. The method of claim 14, further comprising cycling the negative pressure.