CA2651833A1 - Device and method for wound therapy - Google Patents

Device and method for wound therapy

Info

Publication number
CA2651833A1
CA2651833A1 CA002651833A CA2651833A CA2651833A1 CA 2651833 A1 CA2651833 A1 CA 2651833A1 CA 002651833 A CA002651833 A CA 002651833A CA 2651833 A CA2651833 A CA 2651833A CA 2651833 A1 CA2651833 A1 CA 2651833A1
Authority
CA
Canada
Prior art keywords
wound
therapy device
wound therapy
liquid collector
vacuum source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002651833A
Other languages
French (fr)
Other versions
CA2651833C (en
Inventor
Ashok V. Joshi
John Howard Gordon
Sai Bhavaraju
Troy C. Dayton
Jeremy Heiser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Smith and Nephew Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=38624419&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2651833(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US11/432,855 external-priority patent/US7615036B2/en
Application filed by Individual filed Critical Individual
Publication of CA2651833A1 publication Critical patent/CA2651833A1/en
Application granted granted Critical
Publication of CA2651833C publication Critical patent/CA2651833C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/71—Suction drainage systems
    • A61M1/73—Suction drainage systems comprising sensors or indicators for physical values
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/02—Adhesive plasters or dressings
    • A61F13/0203—Adhesive plasters or dressings having a fluid handling member
    • A61F13/0206—Adhesive plasters or dressings having a fluid handling member the fluid handling member being absorbent fibrous layer, e.g. woven or nonwoven absorbent pad, island dressings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/02—Adhesive plasters or dressings
    • A61F13/0203—Adhesive plasters or dressings having a fluid handling member
    • A61F13/0213—Adhesive plasters or dressings having a fluid handling member the fluid handling member being a layer of hydrocoloid, gel forming material
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/02—Adhesive plasters or dressings
    • A61F13/023—Adhesive plasters or dressings wound covering film layers without a fluid handling layer
    • A61F13/0243—Adhesive plasters or dressings wound covering film layers without a fluid handling layer characterised by the properties of the skin contacting layer, e.g. air-vapor permeability
    • A61F13/05—
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/28—Polysaccharides or their derivatives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/425—Porous materials, e.g. foams or sponges
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/58—Adhesives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/60—Liquid-swellable gel-forming materials, e.g. super-absorbents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/71—Suction drainage systems
    • A61M1/74—Suction control
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/71—Suction drainage systems
    • A61M1/74—Suction control
    • A61M1/743—Suction control by changing the cross-section of the line, e.g. flow regulating valves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/71—Suction drainage systems
    • A61M1/78—Means for preventing overflow or contamination of the pumping systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/71—Suction drainage systems
    • A61M1/78—Means for preventing overflow or contamination of the pumping systems
    • A61M1/784—Means for preventing overflow or contamination of the pumping systems by filtering, sterilising or disinfecting the exhaust air, e.g. swellable filter valves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
    • A61M1/91—Suction aspects of the dressing
    • A61M1/915—Constructional details of the pressure distribution manifold
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
    • A61M1/96—Suction control thereof
    • A61M1/962—Suction control thereof having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/88—Draining devices having means for processing the drained fluid, e.g. an absorber
    • A61M1/882—Draining devices provided with means for releasing antimicrobial or gelation agents in the drained fluid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
    • A61M1/96—Suction control thereof
    • A61M1/964—Suction control thereof having venting means on or near the dressing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
    • A61M1/98—Containers specifically adapted for negative pressure wound therapy
    • A61M1/982—Containers specifically adapted for negative pressure wound therapy with means for detecting level of collected exudate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/13—General characteristics of the apparatus with means for the detection of operative contact with patient, e.g. lip sensor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/15—Detection of leaks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/75—General characteristics of the apparatus with filters
    • A61M2205/7509—General characteristics of the apparatus with filters for virus
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/75—General characteristics of the apparatus with filters
    • A61M2205/7518—General characteristics of the apparatus with filters bacterial
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M27/00—Drainage appliance for wounds or the like, i.e. wound drains, implanted drains

Abstract

A wound therapy device is disclosed. The wound therapy device may include a housing for covering at least a portion of a wound and for sealing to a body surface of a patient. The housing may also include a liquid collector for retaining liquid therein and a vacuum connection for coupling to a vacuum source. The vacuum connection may be in gaseous communication with the liquid collector. The vacuum connection may be separated from the liquid collector by a liquid barrier.

Claims (60)

1. A wound therapy device, comprising:

a housing configured to cover at least a portion of a wound;
a vacuum source in fluid communication with the housing;

a liquid collector positioned inside of the housing and in operable communication with the wound, wherein said liquid collector is configured to retain wound exudate while simultaneously communicating negative pressure generated by the vacuum source to the wound.
2. The wound therapy device of Claim 1, wherein the liquid collector comprises a porous material defining a plurality of passages to allow fluid communication between the vacuum source and the wound through the liquid collector.
3. The wound therapy device of Claim 2, wherein the liquid collector is sufficiently rigid to allow fluid communication between the vacuum source and the wound through the liquid collector when the device is subject to a pressure lower than atmospheric pressure.
4. The wound therapy device of Claim 2, wherein the housing is sufficiently rigid to allow fluid communication between the vacuum source and the wound through the liquid collector when the device is subject to a pressure lower than atmospheric pressure.
5. The wound therapy device of Claim 2, wherein the housing in combination with the liquid collector is sufficiently rigid to allow fluid communication between the vacuum source and the wound through the liquid collector when the device is subject to a pressure lower than atmospheric pressure.
6. The wound therapy device of Claim 1, wherein the liquid collector is configured to retain liquid under a predetermined amount of mechanical force applied to the liquid collector.
7. The wound therapy device of Claim 1, wherein the vacuum source is internal to the housing.
8. The wound therapy device of Claim 1, wherein the vacuum source is external to the housing.
9. The wound therapy device of Claim 1, further comprising a vacuum chamber in fluid communication with the vacuum source.
10. The wound therapy device of Claim 1, further comprising a liquid-retention chamber.
11. The wound therapy device of Claim 10, wherein the liquid collector is positioned within the liquid-retention chamber.
12. The wound therapy device of Claim 11, wherein the liquid retention chamber is sufficiently rigid to allow fluid communication between the vacuum source and the wound through the liquid collector when the device is subject to a pressure lower than atmospheric pressure.
13. The wound therapy device of Claim 10, wherein the liquid-retention chamber extends from within a wound perimeter to a position outside the wound perimeter.
14. The wound therapy device of Claim 1, wherein the housing comprises a proximal end configured to cover at least a portion of the wound, and a distal end configured to be outside a wound perimeter.
15. The wound therapy device of Claim 14, wherein the vacuum source is attached to the housing adjacent the distal end.
16. The wound therapy device of Claim 14, wherein the vacuum source is attached to the housing adjacent the proximal end.
17. The wound therapy device of Claim 1, further comprising means for maintaining operation of the device independent of device orientation.
18. The wound therapy device of Claim 1, wherein the vacuum source comprises a power supply.
19. The wound therapy device of Claim 1, wherein the housing comprises one of the group consisting of polystyrene, polyester, polyether, polyethylene, silicone, neoprene, and combinations thereof.
20. The wound therapy device of Claim 1, wherein the housing comprises a flexible barrier.
21. The wound therapy device of Claim 20, wherein the flexible barrier comprises polyurethane.
22. The wound therapy device of Claim 1, further comprising a seal for attaching the device to a surface.
23. The wound therapy device of Claim 1, further comprising a skin protection layer for protecting a user's skin.
24. The wound therapy device of Claim 1, further comprising a vacuum disperser in communication with the liquid collector.
25. The wound therapy device of Claim 1, further comprising a moisture disperser in communication with the liquid collector.
26. The wound therapy device of Claim 1, wherein the liquid collector comprises one of the group consisting of sponges, fibers, fabrics, gauzes, absorbent material, adsorbent material, polymers, gels, gelling agents, foams, packing material, and combinations thereof.
27. The wound therapy device of Claim 1, wherein the liquid collector further comprises an antimicrobial agent.
28. The wound therapy device of Claim 1, further comprising a liquid barrier positioned between the liquid collector and the vacuum source.
29. The wound therapy device of Claim 28, wherein the liquid barrier comprises a gas permeable membrane.
30. The wound therapy device of Claim 28, wherein the liquid barrier comprises a hydrophobic structure.
31. The wound therapy device of Claim 1, further comprising a wound interface.
32. The wound therapy device of Claim 31, wherein the wound interface comprises one of the group consisting of a sheet, foam, gel, gauze, a porous matrix, a honeycomb, a mop, confetti, a self-contained tubular structure, and combinations thereof.
33. The wound therapy device of Claim 31, wherein the wound interface layer comprises an antimicrobial agent.
34 The wound therapy device of Claim 31, wherein the wound interface layer comprises a surface in contact with the wound, said surface comprising at least one pore larger than about 100 microns in diameter.
35. The wound therapy device of Claim 1, further comprising an outlet to allow the vacuum source to vent.
36. The wound therapy device of Claim 35, wherein the outlet comprises a filter.
37. The wound therapy device of Claim 1, further comprising an overflow valve.
38. The wound therapy device of Claim 1, further comprising means for controlling pressure within the housing.
39. The wound therapy device of Claim 38, wherein in the means for controlling pressure within the housing comprises a pressure sensor.
40. The wound therapy device of Claim 1, further comprising a gas sensor.
41. The wound therapy device of Claim 1, further comprising an oxygen sensor.
42. The wound therapy device of Claim 1, further comprising a temperature sensor.
43. The wound therapy device of Claim 1, further comprising a fill indicator.
44. The wound therapy device of Claim 43, wherein the fill indicator comprises a moisture detector.
45. The wound therapy device of Claim 43, wherein the fill indicator comprises an electrical conductivity detector.
46. The wound therapy device of Claim 22, further comprising leak detector in operable communication with the seal.
47. The wound therapy device of Claim 1, further comprising a blood detector.
48. The wound therapy device of Claim 1, wherein the device is conformable for use with wounds in various locations.
49. A wound therapy device, comprising:

a housing to cover at least a portion of a wound site;

a vacuum source in fluid communication with the housing;

a porous liquid collector positioned within the housing and in communication with the wound site, the liquid collector defining a plurality of passages, wherein said liquid collector is configured to retain wound exudate while simultaneously communicating negative pressure generated by the vacuum source to the wound site through the liquid collector passages;

a liquid barrier positioned between the liquid collector and the vacuum source;

a wound interface positioned between the wound site and the liquid collector;
and a seal for sealing the housing to skin around the wound site.
50. The wound therapy device of Claim 49, wherein the liquid collector is sufficiently rigid to allow at least one of the liquid collector passages to remain open when the device is subject to a pressure lower than atmospheric pressure.
51. The wound therapy device of Claim 49, further comprising a skin protection layer for protecting a user's skin.
52. The wound therapy device of Claim 49, wherein the liquid collector comprises one of the group consisting of sponges, fibers, fabrics, gauzes, absorbent material, adsorbent material, polymers, gels, gelling agents, foams, packing material, and combinations thereof.
53. The wound therapy device of Claim 52, further comprising a vacuum disperser in communication with the liquid collector.
54. The wound therapy device of Claim 53, further comprising a moisture disperser in communication with the liquid collector.
55. The wound therapy device of Claim 49, further comprising means for maintaining a therapeutic pressure at the wound while the liquid collector is absorbing fluid.
56. A wound therapy device, comprising:

a housing to cover at least a portion of a wound site;

a vacuum source in fluid communication with the housing;

a porous liquid collector positioned within the housing and in communication with the wound site, the liquid collector defining a plurality of passages, wherein said liquid collector is configured to retain wound exudate while simultaneously communicating negative pressure generated by the vacuum source to the wound site through the liquid collector passages;

a liquid barrier positioned between the liquid collector and the vacuum source;
a vacuum disperser in communication with the liquid collector;

a moisture disperser in communication with the liquid collector;

a wound interface positioned between the wound site and the liquid collector;
a skin protection layer;

a seal for sealing the housing to skin around the wound site; and a pressure controller for controlling the pressure within the housing.
57. A wound therapy device, comprising:

a vacuum source module comprising a vacuum source capable of generating negative pressure and a pressure controller for controlling the amount of negative pressure;

a dressing module comprising:

a housing to cover at least a portion of a wound site;

a porous liquid collector positioned within the housing and in communication with the wound site, wherein said liquid collector is configured to retain wound exudate while simultaneously communicating negative pressure generated by the vacuum source module to the wound site;

a liquid barrier positioned between the liquid collector and the vacuum source module;

a seal for sealing the dressing module to a surface around the wound site; and a coupling for maintaining the vacuum source module in communication with the dressing module, said coupling configured to transfer negative pressure generated by the vacuum source module to the dressing module.
58. A method of assembling a wound therapy device comprising the steps of:
providing a vacuum source module comprising a vacuum source capable of generating negative pressure and a pressure controller for controlling the amount of negative pressure;

providing a dressing module comprising:

a housing to cover at least a portion of a wound site;

a porous liquid collector positioned within the housing and in communication with the wound site, wherein said liquid collector is configured to retain wound exudate while simultaneously communicating negative pressure generated by the vacuum source module to the wound site;

a liquid barrier positioned between the liquid collector and the vacuum source module;

a seal for sealing the dressing module to a surface around the wound site;
securing the vacuum source module to the dressing module, such that the vacuum source module transfers negative pressure to the dressing module; and attaching the device adjacent a wound site.
59. A wound therapy apparatus substantially as herein described with reference to any one of the embodiments of the invention illustrated in the accompanying drawings and/or examples.
60. A method of assembling a wound therapy apparatus as herein described with reference to any one of the embodiments of the invention illustrated in the accompanying drawings and/or examples.
CA2651833A 2006-05-11 2007-05-10 Device and method for wound therapy Active CA2651833C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US11/432,855 US7615036B2 (en) 2006-05-11 2006-05-11 Device and method for wound therapy
US11/432,855 2006-05-11
US11/610,458 US7779625B2 (en) 2006-05-11 2006-12-13 Device and method for wound therapy
US11/610,458 2006-12-13
PCT/US2007/011278 WO2007133618A2 (en) 2006-05-11 2007-05-10 Device and method for wound therapy

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