Hypobaric chamber treatment system

• US 7,998,125 B2
• Filed: 05/19/2005
• Issued: 08/16/2011
• Est. Priority Date: 05/21/2004
• Status: Active Grant

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Bluesky Medical Group Inc. (Smith & Nephew PLC)
• Inventors: Weston, Richard Scott
• Primary Examiner(s): Zalukaeva; Tatyana
• Assistant Examiner(s): Chapman; Ginger T
• Application Number:
  US11/132,549
• Publication Number:
  US 20050261615A1
• Time in Patent Office: 2,280 Days
• Field of Search: 604/317, 604/320, 604/321, 604/540, 604/543, 52/21.8
• US Class Current: 604/317
• CPC Class Codes: A61G 10/023 Rooms for the treatment of patients at over- or under-pressure or at a variable pressure
• CPC Class Codes: A61H 2033/145 with CO2
• CPC Class Codes: A61H 2201/0103 inflatable
• CPC Class Codes: A61H 2201/0157 portable
• CPC Class Codes: A61H 2201/0161 Size reducing arrangements when not in use, for stowing or transport
• CPC Class Codes: A61H 2201/0207 heated
• CPC Class Codes: A61H 2201/0214 cooled
• CPC Class Codes: A61H 2201/0242 by a fluid circulating in the apparatus
• CPC Class Codes: A61H 2201/1638 Holding means therefor
• CPC Class Codes: A61H 2201/1642 Holding means therefor
• CPC Class Codes: A61H 2201/5061 Force sensors
• CPC Class Codes: A61H 2201/5082 Temperature sensors
• CPC Class Codes: A61H 2201/5092 Optical sensor
• CPC Class Codes: A61H 2205/065 Hands
• CPC Class Codes: A61H 2205/067 Fingers
• CPC Class Codes: A61H 2205/12 Feet
• CPC Class Codes: A61H 9/0021 Hydraulic massage
• CPC Class Codes: A61H 9/0057 Suction suction kneading A61H7/008
• CPC Class Codes: A61H 9/0078 with intermittent or alternately inflated bladders or cuffs mattresses for preventing bed-sores with alternated pressurized chambers A61G7/05776
• CPC Class Codes: A61H 9/0092 Cuffs therefor
• CPC Class Codes: A61M 1/84 : Drainage tubes; Aspiration tips for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32

Abstract

A reduced pressure treatment appliance is provided for enclosing and providing reduced pressure treatment to an object or a portion of an object. In some embodiments, the reduced pressure treatment appliance may be used to treat wounds and other conditions, such as lymphedema, varicose veins, venous insufficiency and stasis, and other infirmities. In other embodiments, the appliance may be used to provide reduced pressure (or vacuum) treatment for non-medical purposes. In some embodiments, the appliance comprises a flexible chamber and a collapsible frame that may be collapsed while the appliance is not in use. In yet other embodiments, the appliance also includes a vacuum system to supply reduced pressure to the volume within the chamber, a pressurized fluid system to inflate the collapsible frame, a drainage system to remove fluids from the appliance, and a treatment port and a forced entry treatment system to introduce fluids and other treatment instrumentalities into the volume within the chamber. In still other embodiments, the chamber is designed for use with distal extremital portions of a body. In further embodiments, the appliance also comprises a semi-permeable liner positioned between the chamber and the portion of a body to be treated. Finally, methods are provided for using various embodiments of the appliance.

Claims

1. An appliance for administering reduced pressure treatment to an object or a portion of an object, the appliance comprising:

a flexible chamber having an opening, wherein the flexible chamber is sized to enclose substantially all of the object or the portion of the object to be treated and adapted to maintain reduced pressure within the volume of the flexible chamber, wherein the chamber is a single chamber, said object or portion of the object extending through the opening into the volume defined by the flexible chamber;

a collapsible frame, wherein the collapsible frame supports the flexible chamber away from the object or the portion of the object to be treated while the appliance is in use, and wherein the collapsible frame comprises one or more longitudinal frame members extending longitudinally along the length of the chamber and one or more circumferential frame members extending circumferentially across the chamber generally transverse to a longitudinal axis of the chamber, at least one of the one or more longitudinal members being movable between a collapsed configuration and an extended configuration, and wherein the longitudinal and circumferential frame members are inflatable and are in fluid communication with each other;

a sealing mechanism to seal the opening so that reduced pressure may be maintained within the volume of the flexible chamber; and

a reduced pressure supply mechanism to operably connect the flexible chamber to a reduced pressure supply source that provides a supply of reduced pressure to the flexible chamber, so that the volume within the flexible chamber is supplied with reduced pressure by the reduced pressure supply source in an amount sufficient to treat a wound, and wherein the chamber has a substantially uniform pressure throughout the volume defined by the flexible chamber;

wherein the flexible chamber and the collapsible frame may be collapsed to a smaller size when the appliance is not in use.

2. The appliance of claim 1, wherein:

the one or more longitudinal frame members and the one or more circumferential frame members of the collapsible frame comprise at least one inflatable member, wherein the at least one inflatable member is inflated with a pressurized fluid when the appliance is in use and may be deflated when the appliance is not in use; and

the appliance is further comprised of a pressurized fluid supply source and pressurized fluid supply mechanism to operably connect the collapsible frame to the pressurized fluid supply source, so that the at least one inflatable member is supplied with the pressurized fluid by the pressurized fluid supply source.

3. The appliance of claim 2, wherein the one or more longitudinal frame members and the one or more circumferential frame members of the collapsible frame comprise at least two inflatable members and the at least two inflatable members are operably connected together so that the pressurized fluid may flow between them.

4. The appliance of claim 2, wherein the pressurized fluid is compressed air and the pressurized fluid supply source is an air compressor.

5. The appliance of claim 2, wherein the sealing mechanism is comprised of a flexible sleeve.

6. The appliance of claim 1, wherein the flexible chamber is comprised of a flexible or semi-flexible polymer material.

7. The appliance of claim 1, wherein the reduced pressure supply source is comprised of a vacuum pump.

8. The appliance of claim 7, wherein the reduced pressure supply source further comprises a control system for the vacuum pump, wherein the control system controls the operation of the vacuum pump.

9. The appliance of claim 7, wherein:

the reduced pressure supply source further comprises a filter operably positioned between the vacuum pump and the reduced pressure supply mechanism; and

the filter prevents the venting of and contamination of the vacuum pump by micro-organisms or fluids or both aspirated from the portion of the body to be treated.

10. The appliance of claim 1, wherein the reduced pressure supply mechanism is comprised of flexible tubing.

11. The appliance of claim 1, wherein the reduced pressure supply mechanism is further comprised of a suction bulb system.

12. The appliance of claim 1, wherein the reduced pressure within the volume of the flexible chamber in the area of the portion of the body to be treated is in the range from approximately 20 mm of Hg below atmospheric pressure to approximately 125 mm of Hg below atmospheric pressure.

13. The appliance of claim 1, wherein the reduced pressure is applied in a cyclic nature, the cyclic nature providing alternating time periods of application of reduced pressure and without application of reduced pressure.

14. The appliance of claim 1, wherein the treatment device further comprises a treatment port operably attached to the flexible chamber and the treatment port permits fluids and other instrumentalities to be introduced into the volume within the flexible chamber.

15. The appliance of claim 1, wherein the treatment device further comprises a forced entry treatment system operably connected to the flexible chamber for introducing ancillary fluids into the volume within the flexible chamber.

16. The appliance of claim 1, wherein the appliance further comprises a drainage system operably disposed between the flexible chamber and the portion of the body to be treated.

17. The appliance of claim 16, wherein the drainage system further comprises:

an overlay, wherein the overlay is sized to be placed over and enclose a part of the portion of the body to be treated; and

an overlay sealing mechanism to operably seal the overlay to the body.

18. The appliance of claim 17, wherein the overlay is comprised of a semi-permeable material, so that reduced pressure may be maintained in the volume under the overlay at said part of the body.

19. The appliance of claim 17, wherein the drainage system further comprises a draining mechanism extending from the volume under the overlay at said part of the body to an area outside the volume of the flexible chamber so that exudate aspirated from said part of the body may be drained from said part of the body to such outside area.

20. The appliance of claim 19, wherein the area outside the volume of the flexible chamber is the reduced pressure supply source, so that the draining mechanism is in fluid communication with the reduced pressure supply source and reduced pressure is supplied by the draining mechanism to the volume under the overlay at said part of the body.

21. The appliance of claim 20, wherein the draining mechanism is further comprised of a collection system that is operably positioned between the overlay and the reduced pressure supply source and the collection system comprises a container to receive and hold fluid aspirated from said part of the body.

22. The appliance of claim 21, wherein the collection system is further comprised of a pressure halting mechanism to halt the application of reduced pressure to the volume under the overlay at said part of the body when the fluid in the container exceeds a predetermined amount.

23. The appliance of claim 17, wherein the drainage system further comprises a wound packing mechanism disposed between the overlay and said part of the body.

24. The appliance of claim 1, further comprising a fluid impermeable or semi-permeable liner disposed between the chamber and the portion of the body positioned within the chamber.

25. The appliance of claim 24, further comprising a sealing mechanism to seal the fluid impermeable or semi-permeable liner to the portion of the body positioned within the chamber, so that reduced pressure may be maintained within the volume of the chamber and the volume of the liner.

26. The appliance of claim 1, wherein at least one of the one or more longitudinal frame members is disposed axially between two circumferential frame members.

27. An appliance for administering reduced pressure treatment to an object or a portion of an object, the appliance comprising:

a flexible chamber having an opening, wherein the flexible chamber is sized to enclose substantially all of the object or the portion of the object to be treated and adapted to maintain reduced pressure within the volume of the flexible chamber, wherein the chamber is a single chamber, said object or portion of the object extending through the opening into the volume defined by the flexible chamber;

a collapsible frame, wherein the collapsible frame supports the flexible chamber away from the object or the portion of the object to be treated while the appliance is in use, and wherein the collapsible frame comprises one or more longitudinal frame members extending longitudinally along the length of the chamber and one or more circumferential frame members extending circumferentially across the chamber generally transverse to a longitudinal axis of the chamber, at least one of the one or more longitudinal members being movable between a collapsed configuration and an extended configuration;

a sealing mechanism to seal the opening so that reduced pressure may be maintained within the volume of the flexible chamber; and

a reduced pressure supply mechanism to operably connect the flexible chamber to a reduced pressure supply source that provides a supply of reduced pressure to the flexible chamber, so that the volume within the flexible chamber is supplied with reduced pressure by the reduced pressure supply source in an amount sufficient to treat a wound, and wherein the chamber has a substantially uniform pressure throughout the volume defined by the flexible chamber;

wherein the flexible chamber and the collapsible frame may be collapsed to a smaller size when the appliance is not in use, and wherein the one or more longitudinal frame members and the one or more circumferential frame members of the collapsible frame comprise at least one inflatable member, wherein the at least one inflatable member is inflated with a pressurized fluid when the appliance is in use and may be deflated when the appliance is not in use; and

the appliance is further comprised of a pressurized fluid supply source and pressurized fluid supply mechanism to operably connect the collapsible frame to the pressurized fluid supply source, so that the at least one inflatable member is supplied with the pressurized fluid by the pressurized fluid supply source.

28. The appliance of claim 27, wherein the flexible chamber comprises a flexible or semi-flexible polymer material.

29. The appliance of claim 27, wherein the reduced pressure supply source comprises a vacuum pump.

30. The appliance of claim 29, wherein the reduced pressure supply source further comprises a control system for the vacuum pump, wherein the control system controls the operation of the vacuum pump.

31. The appliance of claim 29, wherein:

the reduced pressure supply source further comprises a filter operably positioned between the vacuum pump and the reduced pressure supply mechanism; and

the filter prevents the venting of and contamination of the vacuum pump by micro-organisms or fluids or both aspirated from the portion of the body to be treated.

32. The appliance of claim 27, wherein the appliance further comprises a drainage system operably disposed between the flexible chamber and the portion of the body to be treated.

33. The appliance of claim 32, wherein the drainage system further comprises:

an overlay, wherein the overlay is sized to be placed over and enclose a part of the portion of the body to be treated; and

an overlay sealing mechanism to operably seal the overlay to the body.

34. The appliance of claim 33, wherein the drainage system further comprises a wound packing mechanism disposed between the overlay and said part of the body.

35. The appliance of claim 27, further comprising a fluid impermeable or semi-permeable liner disposed between the chamber and the portion of the body positioned within the chamber.

36. The appliance of claim 35, further comprising a sealing mechanism to seal the fluid impermeable or semi-permeable liner to the portion of the body positioned within the chamber, so that reduced pressure may be maintained within the volume of the chamber and the volume of the liner.