Reduced pressure treatment system

• US 8,118,794 B2
• Filed: 11/02/2010
• Issued: 02/21/2012
• Est. Priority Date: 09/03/2002
• Status: Expired due to Term

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Bluesky Medical Group Inc. (Smith & Nephew PLC)
• Inventors: Weston, Richard Scott
• Primary Examiner(s): Anderson, Lynne
• Application Number:
  US12/938,291
• Publication Number:
  US 20110046585A1
• Time in Patent Office: 476 Days
• Field of Search: 604313-316, 604/543
• US Class Current: 604/315
• CPC Class Codes: A61F 13/00059 provided with visual effects, e.g. printed or colored
• 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 15/008 Appliances for wound protecting, e.g. avoiding contact between wound and bandage corn plasters A61F13/063
• CPC Class Codes: A61F 2013/00153 coloured or with decoration pattern or printing
• CPC Class Codes: A61F 2013/0028 applying of mechanical pressure; passive massage
• CPC Class Codes: A61M 1/732 Visual indicating means for vacuum pressure
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold
• 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 1/966 having a pressure sensor on or near the dressing
• CPC Class Codes: A61M 1/982 with means for detecting level of collected exudate
• CPC Class Codes: A61M 2205/3344 Measuring or controlling pressure at the body treatment site

Abstract

A wound treatment apparatus is provided for treating tissue damage, which comprises a fluid impermeable wound cover sealed over a site for purposes of applying a reduced pressure to the site. The apparatus also includes a cover with protrusions on its surface for purposes of monitoring pressure at the site. An absorbable matrix may be placed in the site of a wound to encourage tissue growth into the matrix. Temperature of the site may be monitored using a layer of temperature sensitive material and temperature sensors connected to an alarm and recording device. A vacuum pump supplies suction within the wound cover over the treatment site. A portable version of the wound treatment apparatus is also provided. Finally, a method for treating wounds using reduced pressure is provided.

Claims

1. An apparatus for the treatment of a wound, comprising:

a flexible wound cover;

a container in direct contact with and in fluid communication with the wound cover, the container being configured to retain fluid from the wound;

a vacuum source in fluid communication with the container; and

a hydrophobic filter interposed between the container and the vacuum source.

2. The apparatus of claim 1, wherein at least the wound cover, the container and the filter are integrated into a single unit.

3. The apparatus of claim 2, wherein the vacuum source is removably attached to the wound cover.

4. The apparatus of claim 1, wherein the apparatus is self-contained and portable.

5. The apparatus of claim 1, further comprising a battery power source.

6. The apparatus of claim 1, wherein the filter is integrated into the container.

7. The apparatus of claim 1, further comprising a vacuum source shutoff mechanism responsive to the fluid level in the container.

8. The apparatus of claim 7, wherein the vacuum source further comprises a control mechanism responsive to a signal sent from the shutoff mechanism.

9. The apparatus of claim 1, further comprising a flexible padding under the cover.

10. The apparatus of claim 1, further comprising an adhesive material disposed on the cover so as to create a substantially fluid-tight seal to the skin surrounding the wound.

11. The apparatus of claim 1, further comprising a porous screen disposed underneath the cover, the porous screen being constructed so as to permit the passage of fluids and gasses.

12. The apparatus of claim 1, further comprising a packing material underneath the cover.

13. The apparatus of claim 1, further comprising an absorbable material configured to be placed between the wound cover and the wound.

14. The apparatus of claim 1, wherein the wound cover is fluid-impermeable.

15. The apparatus of claim 1, wherein the cover further comprises a port in fluidic connection with the vacuum source.

16. The apparatus of claim 1, wherein the vacuum source is connected to the container via tubing.

17. The apparatus of claim 1, further comprising at least one monitor on or under the wound cover configured to monitor wound treatment.

18. The apparatus of claim 17, wherein the monitor is configured to monitor pressure beneath the wound cover.

19. The apparatus of claim 17, wherein the monitor is configured to monitor temperature in the area of the wound.

20. The apparatus of claim 17, comprising a plurality of monitors on the wound cover configured to provide a visual indication of the wound treatment.

21. The apparatus of claim 17, wherein the wound cover comprises a transparent or semi-transparent material to allow visualization through the wound cover.

22. The apparatus of claim 1, further comprising a shutoff mechanism configured to halt the supply of negative pressure to the wound cover.

23. The apparatus of claim 22, wherein the shutoff mechanism comprises an electrical switch operably connected to a vacuum system controller connected to the vacuum source.

24. The apparatus of claim 22, wherein the shutoff mechanism comprises an optical sensor operably connected to a vacuum system controller connected to the vacuum source.

25. An apparatus for the treatment of a wound, comprising:

a wound cover;

a fluid collector integrated with the wound cover and configured to be positioned with the wound cover over the wound, the fluid collector configured to retain fluid from the wound, wherein the fluid collector is in direct contact with the wound cover;

a vacuum source configured to provide suction to the wound beneath the wound cover; and

a filter intermediate the fluid collector and the vacuum source.

26. The apparatus of claim 25, wherein the wound cover comprises a flexible flat wound cover.

27. The apparatus of claim 25, wherein the wound cover comprises a rigid, fluid impermeable material.

28. The apparatus of claim 25, wherein the wound cover is cone-shaped, bowl-shaped or cup-shaped.

29. The apparatus of claim 25, wherein the fluid collector comprises a container attached to the wound cover.

30. The apparatus of claim 25, wherein the vacuum source comprises a portable vacuum pump.

31. The apparatus of claim 25, wherein the filter is a hydrophobic or micropore filter.

32. The apparatus of claim 25, wherein the wound cover, vacuum source, filter and fluid collector are integrated as a single unit directly attached to each other or the wound cover.

33. The apparatus of claim 25, further comprising an absorbable material configured to be positioned between the wound cover and the wound.

34. The apparatus of claim 25, further comprising at least one tube connected with the vacuum source configured to provide suction from the vacuum source to the wound.

35. The apparatus of claim 25, further comprising at least one monitor on or under the wound cover configured to monitor wound treatment.

36. The apparatus of claim 35, wherein the monitor is configured to monitor pressure beneath the wound cover.

37. The apparatus of claim 25, further comprising a shutoff mechanism configured to halt the supply of suction to the wound cover.

38. The apparatus of claim 37, wherein the shutoff mechanism comprises an electrical switch operably connected to a vacuum system controller connected to the vacuum source.

39. The apparatus of claim 37, wherein the shutoff mechanism comprises an optical sensor operably connected to a vacuum system controller connected to the vacuum source.

40. The apparatus of claim 25, further comprising a sealing ring secured to the wound cover.

41. The apparatus of claim 25, wherein the wound cover comprises a flexible polymer sheet.

42. An apparatus for the treatment of a wound, comprising:

a wound cover configured to be positioned over a wound; and

a vacuum source adjacent the wound cover configured to apply negative pressure to the wound, wherein the vacuum source and the wound cover form a single unit and the vacuum source is configured to be positioned with the wound cover over a patient,

wherein the wound cover defines a periphery and the vacuum source is located within the periphery of the wound cover.

43. The apparatus of claim 42, further comprising a fluid collector attached to the wound cover.

44. The apparatus of claim 43, further comprising a filter configured to prevent material from contaminating the vacuum source.

45. The apparatus of claim 44, wherein the vacuum source, filter and fluid collector form a single integrated unit configured to be positioned with the wound cover over the wound.

46. The apparatus of claim 42, wherein the vacuum source is in direct contact with the wound cover.

47. The apparatus of claim 46, wherein the vacuum source is attached to an outer surface of the wound cover.

48. The apparatus of claim 43, wherein the fluid collector is in direct contact with the wound cover.

49. The apparatus of claim 42, further comprising at least one monitor on or under the wound cover configured to monitor wound treatment.

50. The apparatus of claim 49, wherein the monitor is configured to monitor pressure beneath the wound cover.

51. The apparatus of claim 49, wherein the monitor is configured to monitor temperature in the area of the wound.

52. The apparatus of claim 49, comprising a plurality of monitors on the wound cover configured to provide a visual indication of the wound treatment.

53. The apparatus of claim 42, further comprising a shutoff mechanism configured to halt the supply of negative pressure to the wound cover.

54. The apparatus of claim 53, wherein the shutoff mechanism comprises an electrical switch operably connected to a vacuum system controller connected to the vacuum source.

55. The apparatus of claim 53, wherein the shutoff mechanism comprises an optical sensor operably connected to a vacuum system controller connected to the vacuum source.

56. The apparatus of claim 42, wherein the vacuum source is battery-powered.

57. The apparatus of claim 42, wherein the wound cover comprises a flexible sheet.

58. The apparatus of claim 42, wherein the wound cover comprises a rigid, fluid-impermeable material.

59. The apparatus of claim 42, further comprising a sealing ring secured to the wound cover.

60. The apparatus of claim 42, wherein the wound cover comprises a flexible sheet.

61. A method of treating a wound, comprising:

positioning a wound treatment apparatus comprising a wound cover and a fluid collector integrated with the wound cover over a wound;

applying negative pressure to the wound with a vacuum source to draw wound exudate into the fluid collector, wherein the fluid collector is in direct contact with the wound cover as negative pressure is being applied; and

retaining wound exudate within the fluid collector as the negative pressure is being applied with the fluid collector positioned over the wound.

62. The method of claim 61, further comprising sealing the wound cover to skin surrounding the wound.

63. The method of claim 61, further comprising powering the vacuum source with a battery.

64. The method of claim 61, further comprising shutting off the vacuum source if the fluid level in the fluid collector exceeds a predetermined amount.

65. The method of claim 61, wherein the negative pressure is applied to the wound through a filter between the fluid collector and the vacuum source.

66. The method of claim 61, wherein the wound exudate is drawn into a container attached to the wound cover.

67. The method of claim 61, wherein the fluid collector is positioned above the wound cover.

68. The method of claim 61, wherein negative pressure is applied to the wound through at least one tube between the vacuum source and the wound cover.

69. The method of claim 61, further comprising monitoring wound treatment with at least one monitor on the wound treatment apparatus.

70. The method of claim 61, wherein monitoring comprises monitoring the pressure beneath the wound cover.

71. The method of claim 61, further comprising ceasing the application of negative pressure in response to a shutoff mechanism responsive to the volume of exudate in the fluid collector exceeding a predetermined amount.

72. The method of claim 71, wherein the shutoff mechanism is an electrical switch operably connected to a vacuum system controller connected to the vacuum source.

73. The method of claim 71, wherein the shutoff mechanism is an optical sensor.

74. The method of claim 61, wherein the negative pressure is applied cyclically.

75. The method of claim 62, wherein sealing the wound cover comprises applying a sealing ring secured to the wound cover to a region of skin surrounding the wound.

76. An apparatus for the treatment of a wound, comprising:

a wound cover;

a fluid collector integrated with the wound cover and configured to be positioned with the wound cover over the wound, the fluid collector configured to retain fluid from the wound;

a vacuum source configured to provide suction to the wound beneath the wound cover, wherein the vacuum source comprises a portable vacuum pump, and wherein the vacuum pump is directly attached to the cover; and

a filter intermediate the fluid collector and the vacuum source.

77. A method of treating a wound, comprising:

positioning a wound treatment apparatus comprising a wound cover and a fluid collector integrated with the wound cover over a wound;

applying negative pressure to the wound with a vacuum source to draw wound exudate into the fluid collector, wherein the vacuum source is directly attached to the wound cover; and

retaining wound exudate within the fluid collector as the negative pressure is being applied with the fluid collector positioned over the wound.

78. A method of treating a wound, comprising:

positioning a wound treatment apparatus comprising a wound cover and a fluid collector integrated with the wound cover over a wound;

applying negative pressure to the wound with a vacuum source to draw wound exudate into the fluid collector;

retaining wound exudate within the fluid collector as the negative pressure is being applied with the fluid collector positioned over the wound; and

monitoring wound treatment with at least one monitor on the wound treatment apparatus, wherein monitoring comprises monitoring the temperature in the area of the wound.

79. A method of treating a wound, comprising:

positioning a wound treatment apparatus comprising a wound cover and a fluid collector integrated with the wound cover over a wound;

applying negative pressure to the wound with a vacuum source to draw wound exudate into the fluid collector;

retaining wound exudate within the fluid collector as the negative pressure is being applied with the fluid collector positioned over the wound; and

monitoring wound treatment with at least one monitor on the wound treatment apparatus, wherein monitoring the wound treatment is performed visually with a plurality of monitors on the wound cover.

80. An apparatus for the treatment of a wound, comprising:

a wound cover;

a fluid collector integrated with the wound cover and configured to be positioned with the wound cover over the wound, the fluid collector configured to retain fluid from the wound;

a vacuum source configured to provide suction to the wound beneath the wound cover;

a filter intermediate the fluid collector and the vacuum source; and

at least one monitor on or under the wound cover configured to monitor wound treatment, wherein the monitor is configured to monitor temperature in the area of the wound.

81. An apparatus for the treatment of a wound, comprising:

a wound cover;

a fluid collector integrated with the wound cover and configured to be positioned with the wound cover over the wound, the fluid collector configured to retain fluid from the wound;

a vacuum source configured to provide suction to the wound beneath the wound cover;

a filter intermediate the fluid collector and the vacuum source; and

a plurality of monitors on the wound cover configured to provide a visual indication of the wound treatment.

82. An apparatus for the treatment of a wound, comprising:

a wound cover;

a fluid collector integrated with the wound cover and configured to be positioned with the wound cover over the wound, the fluid collector configured to retain fluid from the wound;

a vacuum source configured to provide suction to the wound beneath the wound cover;

a filter intermediate the fluid collector and the vacuum source; and

at least one monitor on or under the wound cover configured to monitor wound treatment, wherein the wound cover comprises a transparent or semi-transparent material to allow visualization through the wound cover.

83. An apparatus for the treatment of a wound, comprising:

a wound cover;

a fluid collector integrated with the wound cover and configured to be positioned with the wound cover over the wound, the fluid collector configured to retain fluid from the wound;

a vacuum source configured to provide suction to the wound beneath the wound cover; and

a filter intermediate the fluid collector and the vacuum source;

wherein the wound cover defines a periphery and the fluid collector is located within the periphery of the wound cover.

84. The apparatus of claim 83, wherein the wound cover comprises a flexible polymer sheet.

85. The apparatus of claim 84, further comprising an adhesive on an underside of the wound cover.

86. The apparatus of claim 85, further comprising an adhesive strip configured to be positioned over at least a portion of the cover.

87. The apparatus of claim 83, further comprising a sealing ring secured to the wound cover.

88. The apparatus of claim 83, wherein the vacuum source comprises a portable, battery powered vacuum pump configured to be connected to the wound cover by at least one tube.

89. The apparatus of claim 83, wherein the filter is a hydrophobic or micropore filter.

90. The apparatus of claim 83, wherein the wound cover, filter and fluid collector are integrated as a single unit directly attached to each other or the wound cover.

91. The apparatus of claim 83, further comprising at least one monitor on or under the wound cover configured to monitor wound treatment.

92. The apparatus of claim 83, further comprising a plurality of monitors on the wound cover configured to provide a visual indication of the wound treatment.

93. The apparatus of claim 83, wherein the wound cover comprises a transparent or semi-transparent material to allow visualization through the wound cover.