System for providing continual drainage in negative pressure wound therapy

• US 8,784,392 B2
• Filed: 08/10/2012
• Issued: 07/22/2014
• Est. Priority Date: 06/01/2009
• Status: Active Grant

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Vess, Mark A., Shah, Chirag B., Braga, Richard M., Swisher, David R.
• Primary Examiner(s): SU, SUSAN SHAN
• Application Number:
  US13/571,548
• Publication Number:
  US 20130172836A1
• Time in Patent Office: 711 Days
• Field of Search: 604313-321
• US Class Current: 604/304
• CPC Class Codes: A61F 13/023 wound covering film layers without a fluid retention layer
• CPC Class Codes: A61F 2013/00089 Wound bandages A61F2013/00361 takes precedence;
• CPC Class Codes: A61F 2013/00174 possibility of applying pressure
• CPC Class Codes: A61M 1/784 by filtering, sterilising or disinfecting the exhaust air, e.g. swellable filter valves
• 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 1/86 Connectors between drainage tube and handpiece, e.g. drainage tubes detachable from handpiece
• CPC Class Codes: A61M 1/88 Draining devices having means for processing the drained fluid, e.g. an absorber for liposuction A61M1/892
• CPC Class Codes: A61M 1/912 Connectors between dressing and drainage tube
• CPC Class Codes: A61M 1/964 having venting means on or near the dressing
• CPC Class Codes: A61M 1/98 Containers specifically adapted for negative pressure wound therapy
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2205/7518 bacterial
• CPC Class Codes: A61M 2205/7536 allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes

Abstract

A system for subatmospheric pressure therapy in connection with healing a wound is provided. The system includes a wound dressing cover dimensioned for positioning relative to a wound bed of a subject to establish a reservoir over the wound bed in which subatmospheric pressure may be maintained, a subatmospheric pressure mechanism including, a housing, a vacuum source disposed in the housing, and a collection canister in fluid communication with the vacuum source. The system further includes an exudate conduit in fluid communication with the wound dressing and the collection canister for collecting exudate removed from the reservoir and deposited in the collection canister under influence of the vacuum source and a vent conduit in fluid communication with the collection canister and the wound dressing for introducing air into the reservoir to facilitate flow of exudate through the exudate conduit.

Claims

1. A system for subatmospheric pressure therapy in connection with healing a wound, the system comprising:

a wound dressing dimensioned for positioning over the wound and configured to establish a reservoir over the wound in which subatmospheric pressure may be maintained;

a subatmospheric pressure mechanism comprising a housing and a vacuum source disposed in the housing;

a collection canister configured to be in fluid communication with the vacuum source;

a wound port configured to be operatively connected to the wound dressing in fluid communication with the reservoir, the wound port comprising;

a vacuum port; and

a plurality of holes formed in a plate and arranged circumferentially around the wound port, the plurality of holes being operable to allow ambient air into the reservoir; and

an exudate conduit configured to be in fluid communication with the wound port and the collection canister, the exudate conduit configured for transporting exudate removed from the reservoir to be deposited in the collection canister under influence of the vacuum source.

2. The system according to claim 1, wherein the plate is welded to the wound port.

3. The system according to claim 1, wherein the plate is configured to be attached to the wound dressing.

4. A system for subatmospheric pressure therapy in connection with healing a wound, the system comprising:

a port configured to be in fluid communication with a wound dressing, the port comprising;

a vacuum port; and

a plurality of holes formed in a plate, the plurality of holes configured to allow ambient air under the wound dressing.

5. The system according to claim 4, wherein the plurality of holes are arranged substantially circumferentially around the port.

6. The system according to claim 4, further comprising a negative pressure source configured to provide negative pressure to the wound dressing, wherein the port is configured to be in fluid communication with the negative pressure source via the vacuum port.

7. The system according to claim 6, further comprising a lumen configured to be in fluid communication with the port and the negative pressure source, the lumen configured to communicate negative pressure under the dressing.

8. The system according to claim 6, further comprising a canister configured to be in fluid communication with the negative pressure source, the canister further configured to store exudate removed from the wound.

9. The system according to claim 4, wherein the plate is welded to the port.

10. The system according to claim 4, wherein the plate is configured to be attached to the wound dressing.

11. The system according to claim 4, further comprising the wound dressing configured to cover the wound.

12. The system according to claim 4, further comprising a conduit configured to be in fluid communication with the wound dressing and the vacuum port, the conduit configured to transport exudate removed from the wound.

13. The system according to claim 12, further comprising a conduit configured to be in fluid communication with the wound dressing and the vacuum port, the conduit configured to transport exudate removed from the wound to the canister.

14. The system according to claim 4, further comprising a canister configured to be in fluid communication with a negative pressure source, the canister further configured to store exudate removed from the wound.

15. The system according to claim 4, wherein the port further comprises a vent configured to be in fluid communication with atmosphere.

16. The system according to claim 15, wherein the vent is covered by a filter.

17. The system according to claim 4, wherein the port further comprises a conduit.

18. The system according to claim 17, wherein the port further comprises a flange coupled to the conduit.

19. The system according to claim 18, wherein the flange is configured to be affixed to the wound dressing.