Negative pressure wound treatment device, and methods

• US 8,025,650 B2
• Filed: 06/12/2007
• Issued: 09/27/2011
• Est. Priority Date: 06/12/2006
• Status: Active Grant

• Current Assignee: Wound Care Technologies, Inc. (Baxter International Inc.)
• Original Assignee: Wound Care Technologies, Inc. (Baxter International Inc.)
• Inventors: Duchon, Douglas, Anderson, Paul J.
• Primary Examiner(s): HAND, MELANIE JO
• Application Number:
  US11/818,059
• Publication Number:
  US 20080004549A1
• Time in Patent Office: 1,568 Days
• Field of Search: 604/304, 604/305, 604/313, 604/369, 602/46
• US Class Current: 604/313
• 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 2013/00174 possibility of applying pressure
• CPC Class Codes: A61F 2013/00217 not adhering to the wound with wax A61F2013/00161
• CPC Class Codes: A61M 1/73 comprising sensors or indicators for physical values
• CPC Class Codes: A61M 1/75 Intermittent or pulsating suction A61M1/63, A61M1/772 take precedence
• CPC Class Codes: A61M 1/81 Piston pumps, e.g. syringes
• CPC Class Codes: A61M 1/90 Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
• 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 1/984 portable on the body
• CPC Class Codes: A61M 2202/0014 removed from the body
• CPC Class Codes: A61M 2205/584 having a color code
• CPC Class Codes: A61M 2209/088 on the body

Abstract

A negative pressure (i.e., vacuum or suction) wound healing device and system incorporating the device. The device of the present disclosure is smaller, lighter, portable, and overall more manageable by both the user and the medical personnel than the conventional systems. The device could be readily worn by the user.

Claims

1. A system for applying negative pressure on a wound, the system comprising:

a device including structure configured to provide negative pressure on the wound via a first vacuum line, wherein the device weighs no more than 3 lbs;

a dressing material sealably covering the wound, the first vacuum line extending between the device and the dressing material to provide negative pressure to the wound sealably covered by the dressing material; and

an expandable spray-in foam located within the wound below the dressing material, the spray-in foam exposed to the negative pressure provided by the device, wherein the spray-in foam has an initial flowable state and a final set state wherein the spray-in foam automatically substantially conforms to a shape of the wound.

2. A system according to claim 1, wherein the device is configured to be mounted on a person.

3. A system according to claim 1, wherein the device weighs no more than about 2.5 lbs.

4. A system according to claim 3, wherein the device weighs no more than about 2 lbs.

5. A system according to claim 4, wherein the device weighs no more than about 1.5 lbs.

6. A system according to claim 1, wherein the housing of the device has a volume of no more than about 125 in³.

7. A system according to claim 1, wherein the device includes a housing having at least a flexible and expandable portion.

8. A system according to claim 1, wherein the structure within the device configured to provide negative pressure on the wound includes a peristaltic pump.

9. A system according to claim 1, wherein the structure within the device configured to provide negative pressure on the wound includes a syringe pump.

10. A system according to claim 1, wherein the pump includes a three-way check valve to prevent application of negative pressure to the device.

11. A system according to claim 1, wherein the dressing material is connected to the device via a plurality of vacuum lines.

12. A system according to claim 1, further comprising a container connected to the device for storing extrudate obtained by the applied pressure on the wound.

13. A system according to claim 12, wherein the container is located outside of a housing of the device, the housing configured to enclose the structure for providing negative pressure on the wound.

14. A method of applying negative pressure on an open wound, the method comprising:

spraying expandable foam on the wound, wherein the foam has an initial flowable state and a final set state wherein the foam automatically substantially conforms to a shape of the wound;

sealably covering the wound and the foam with a dressing material; and

applying negative pressure on the wound to create a vacuum under the dressing material, wherein the negative pressure is applied by a pump portably mounted on a person'"'"'s body, wherein the pump includes a three-way check valve.

15. A method according to claim 14, wherein the pump is a peristaltic pump.

16. A method according to claim 14, wherein the pump is a syringe pump.

17. A system for applying negative pressure on a wound, the system comprising:

a device including structure configured to provide negative pressure on the wound via a first vacuum line, wherein a housing of the device has a volume of no more than about 125 in³;

a dressing material sealably covering the wound, the first vacuum line extending between the device and the dressing material to provide negative pressure to the wound sealably covered by the dressing material; and

an expandable spray-in foam located within the wound below the dressing material, the spray-in foam exposed to the negative pressure provided by the device, wherein the spray-in foam has an initial flowable state and a final set state wherein the spray-in foam automatically substantially conforms to a shape of the wound.

18. A system for applying negative pressure on a wound, the system comprising:

a device including structure configured to provide negative pressure on the wound via a first vacuum line, wherein the device includes a housing having at least a flexible and expandable portion;

a dressing material sealably covering the wound, the first vacuum line extending between the device and the dressing material to provide negative pressure to the wound sealably covered by the dressing material; and

an expandable spray-in foam located within the wound below the dressing material, the spray-in foam exposed to the negative pressure provided by the device, wherein the spray-in foam has an initial flowable state and a final set state wherein the spray-in foam automatically substantially conforms to a shape of the wound.

19. A system for applying negative pressure on a wound, the system comprising:

a device including structure configured to provide negative pressure on the wound via a first vacuum line, wherein the structure within the device configured to provide negative pressure on the wound includes a peristaltic pump;

a dressing material sealably covering the wound, the first vacuum line extending between the device and the dressing material to provide negative pressure to the wound sealably covered by the dressing material; and

an expandable spray-in foam located within the wound below the dressing material, the spray-in foam exposed to the negative pressure provided by the device, wherein the spray-in foam has an initial flowable state and a final set state wherein the spray-in foam automatically substantially conforms to a shape of the wound.

20. A system for applying negative pressure on a wound, the system comprising:

a device including structure configured to provide negative pressure on the wound via a first vacuum line, wherein the structure within the device configured to provide negative pressure on the wound includes a syringe pump;

a dressing material sealably covering the wound, the first vacuum line extending between the device and the dressing material to provide negative pressure to the wound sealably covered by the dressing material; and

an expandable spray-in foam located within the wound below the dressing material, the spray-in foam exposed to the negative pressure provided by the device, wherein the spray-in foam has an initial flowable state and a final set state wherein the spray-in foam automatically substantially conforms to a shape of the wound.

21. A system for applying negative pressure on a wound, the system comprising:

a device including structure configured to provide negative pressure on the wound via a first vacuum line;

a dressing material sealably covering the wound, the first vacuum line extending between the device and the dressing material to provide negative pressure to the wound sealably covered by the dressing material;

an expandable spray-in foam located within the wound below the dressing material, the spray-in foam exposed to the negative pressure provided by the device, wherein the spray-in foam has an initial flowable state and a final set state wherein the spray-in foam automatically substantially conforms to a shape of the wound; and

a container connected to the device for storing extrudate obtained by the applied pressure on the wound, wherein the container is located outside of a housing of the device, the housing configured to enclose the structure for providing negative pressure on the wound.