Negative pressure wound treatment device, and methods

• US 9,839,727 B2
• Filed: 03/05/2015
• Issued: 12/12/2017
• 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: Anderson, Paul J., Duchon, Douglas
• Primary Examiner(s): Zalukaeva, Tatyana
• Assistant Examiner(s): Weng, Kai
• Application Number:
  US14/639,317
• Publication Number:
  US 20150297808A1
• Time in Patent Office: 1,013 Days
• 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 managable 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 a housing configured to be mounted on a person, the housing including a pump configured to provide negative pressure on the wound via a first vacuum line, the housing including a top surface, a bottom surface, a first side, a second side, a back side, and a front side, wherein the device includes an instrument panel on the top surface and wherein one of the first side, second side, front side, and back side includes a concave portion contoured to fit a person'"'"'s torso, wherein the device weighs no more than about 3 lbs.;

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

a flexible container connected to the housing of the device for storing extrudate obtained by the applied pressure on the wound; and

an expandable foam located within the wound below the dressing material, the expandable foam exposed to the negative pressure provided by the device, wherein the expandable foam is configured to conform to a shape of the wound, and wherein the expandable foam is further configured to set after exposure to an environmental condition.

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

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

4. A system according to claim 3, wherein the device weighs no more than about 1.5 lbs.

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

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

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

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

9. A system according to claim 1, wherein the flexible container is located outside of the housing of the device.

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

a device including a housing configured to be mounted on a person, the housing including a pump configured to provide negative pressure on the wound via a first vacuum line,

the housing including a top surface, a bottom surface, a first side, a second side, a back side, and a front side, wherein the device includes an instrument panel on the top surface and wherein one of the first side, second side, front side, and back side includes a concave portion contoured to fit a person'"'"'s torso, wherein the 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 housing and the dressing material to provide negative pressure to the wound sealingly covered by the dressing material;

a flexible container connected to the housing of the device for storing extrudate obtained by the applied pressure on the wound; and

an expandable foam located within the wound below the dressing material, the expandable foam exposed to the negative pressure provided by the device, wherein the expandable foam is configured to set after exposure to an environmental condition.

14. The system of claim 10, wherein the expandable foam is configured to conform to a shape of the wound.

15. The system of claim 14, wherein the expandable foam is configured to set after exposure to an environmental condition.

16. The system of claim 15, wherein the environmental condition is at least one of light and air.

17. The system of claim 15, wherein the environmental condition is a curing source.

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

a device including a housing configured to be mounted on a person, the housing including a pump configured to provide negative pressure on the wound via a first vacuum line,

the housing including a top surface, a bottom surface, a first side, a second side, a back side, and a front side, wherein the device includes an instrument panel on the top surface and wherein one of the first side, second side, front side, and back side includes a concave portion contoured to fit a person'"'"'s torso;

a dressing material sealably covering the wound, the first vacuum line extending between the housing and the dressing material to provide negative pressure to the wound sealingly covered by the dressing material, wherein the dressing material includes a top layer and a bottom layer facing the wound, and further wherein the bottom layer is configured to diffuse the negative pressure applied to the wound;

a flexible container located outside of and connected to the housing of the device for storing extrudate obtained by the applied pressure on the wound; and

an expandable foam located within the wound below the dressing material, the expandable foam exposed to the negative pressure provided by the device.

12. The system of claim 11, wherein the bottom layer of the dressing material has multiple holes configured to diffuse the negative pressure applied to the wound.

13. The system of claim 12, wherein spacers are positioned between the top layer and the bottom layer of the dressing material.