Wound dressing with vacuum reservoir

• US 10,463,773 B2
• Filed: 09/29/2016
• Issued: 11/05/2019
• Est. Priority Date: 09/07/2005
• Status: Active Grant

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Haggstrom, Kurt, Fink, E. David, Grundmeier, Katja
• Primary Examiner(s): Anderson, Catharine L
• Application Number:
  US15/280,009
• Publication Number:
  US 20170014556A1
• Time in Patent Office: 1,132 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 13/0209 comprising superabsorbent material
• 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 1/732 Visual indicating means for vacuum pressure
• CPC Class Codes: A61M 1/74 Suction control underwater drainage A61M1/61
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 1/966 having a pressure sensor on or near the dressing
• CPC Class Codes: A61M 1/984 portable on the body
• CPC Class Codes: A61M 1/985 the dressing itself forming the collection container
• CPC Class Codes: A61M 2205/15 Detection of leaks
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/3344 Measuring or controlling pressure at the body treatment site
• CPC Class Codes: A61M 2205/3368 Temperature
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2205/584 having a color code
• CPC Class Codes: A61M 2205/587 Lighting arrangements
• CPC Class Codes: A61M 2205/6081 Colour codes
• 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 39/24 Check- or non-return valves

Abstract

A wound dressing apparatus includes a wound dressing member dimensioned for positioning relative to a wound bed. The wound dressing member including an internal vacuum reservoir and has a port in communication with the vacuum reservoir for applying subatmospheric pressure to the vacuum reservoir to facilitate removal of fluid from the wound bed. The wound dressing member includes a visual pressure indicator associated therewith for indicating a level of pressure within the vacuum reservoir. The visual pressure indicator includes color indicia having a plurality of colors corresponding to a condition of the pressure within the vacuum reservoir. The wound dressing member includes a lower absorbent member positionable adjacent the wound bed and an upper member which at least partially defines the vacuum reservoir. At least one of the top member and the lower absorbent member has the visual pressure indicator mounted thereto.

Claims

1. A wound dressing apparatus for use in negative pressure wound therapy, the wound dressing apparatus comprising:

a wound dressing, the wound dressing comprising;

a wound contact layer configured to be in direct contact with a wound;

a wound cover layer configured to be positioned over the wound, wherein the wound cover layer defines an internal vacuum reservoir when the wound cover layer is positioned over the wound; and

an absorbent layer positioned between the wound contact layer and the wound cover layer; and

a visual indicator configured to indicate a condition of the wound dressing, wherein the visual indicator comprises one or more light emitting sources positioned within a periphery of the wound cover layer of the wound dressing.

2. The wound dressing apparatus according to claim 1, wherein the visual indicator comprises a color indicator.

3. The wound dressing apparatus according to claim 1, further comprising a vacuum pump configured to provide negative pressure to the reservoir.

4. The wound dressing apparatus according to claim 3, wherein the vacuum pump is configured to be positioned external to the wound cover layer.

5. The wound dressing apparatus according to claim 3, wherein the vacuum pump comprises a manual pump.

6. The wound dressing apparatus according to claim 3, wherein the vacuum pump comprises a compressible suction device.

7. The wound dressing apparatus according to claim 3, wherein the vacuum pump comprises an automated pump.

8. The wound dressing apparatus according to claim 1, further comprising an adhesive material on an underside of the wound cover layer to contact tissue surrounding the wound.

9. The wound dressing apparatus according to claim 8, wherein the adhesive material comprises an annular layer positioned on a peripheral portion of the wound cover layer.

10. The wound dressing apparatus according to claim 1, wherein the absorbent layer comprises a super absorbent polymer and a fibrous material.

11. The wound dressing apparatus according to claim 10, wherein the fibrous material comprises cellulose.

12. The wound dressing apparatus according to claim 1, further comprising a vacuum port on the wound cover layer in fluid communication with the internal vacuum reservoir.

13. The wound dressing apparatus according to claim 12, further comprising a flexible tubing configured to connect the vacuum port to a vacuum pump.

14. The wound dressing apparatus according to claim 1, wherein the visual indicator is configured to indicate a condition within the vacuum reservoir associated with a negative pressure level or a leak in the wound dressing.

15. The wound dressing apparatus according to claim 1, further comprising an electronic signaling module circuit board and a battery power source in electrical communication with the visual indicator.

16. The wound dressing apparatus according to claim 1, wherein the wound cover layer is transparent, and the visual indicator is configured to be viewed through the transparent wound cover layer.

17. The wound dressing apparatus according to claim 1, wherein the visual indicator comprises a plurality of different visual indicia.

18. The wound dressing apparatus according to claim 1, wherein the visual indicator comprises a plurality of light emitting sources for different conditions.

19. The wound dressing apparatus according to claim 2, wherein the visual indicator comprises a plurality of light emitting sources of different colors.