Wound treatment device

• US 20090143721A1
• Filed: 11/07/2008
• Published: 06/04/2009
• Est. Priority Date: 11/07/2007
• Status: Active Grant

• Current Assignee: AOTI, Inc.
• Original Assignee: AOTI, Inc.
• Inventors: Hovorka, George
• Granted Patent: US 7,922,678 B2
• Time in Patent Office: Days
• US Class Current: 604/23
• CPC Class Codes: A61G 10/00 Treatment rooms or enclosures for medical purposes baby incubators, couveuses A61G11/00; devices for gas baths with ozone, hydrogen or the like A61H33/14 ; for isolating individuals from external stimuli A61M21/0094 ; containers or portable cabins for affording breathing protection in general A62B31/00
• CPC Class Codes: A61G 10/04 Oxygen tents ; Oxygen hoods
• 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

Abstract

A limb wound treatment device is described having a first end, a second end and an interior therebetween for accommodating a treatment gas. The device can include a flexible housing that can be inflated or a rigid housing. The first end can include an inflatable cuff seal for hermetically sealing against the limb being treated. The second end can include a closed end or an access port that is releasably sealed with a clamping mechanism. Further, the device can include a controller that can inflate that housing, inflate the cuff seal and provide treatment gas to the interior, in response to pressures within the cuff seal and the housing. Further, the device can accommodate different types of wound treatments, such as hyperbaric therapy, compression therapy or negative pressure therapy.

Claims

1. A wound treatment device, comprising:

a housing having a first open end for receiving a limb of a patient and a second closed end forming a chamber therebetween, wherein a portion of the housing includes a first polymer material coated with a second polymer material selected from the group consisting of ethyl vinyl acetate and polyethylene heat sealable material.

2. The device of claim 1, wherein the housing has a first sheet attached to the second sheet at respective edges of the first and second sheets.

3. The device of claim 2, wherein a portion of the first and second sheets are attached to each other forming a plurality of inflatable air passages therebetween.

4. The device of claim 2, wherein a portion of the first sheet and the second sheet form the inflatable cuff.

5. The device of claim 1, further comprising an inflatable cuff at the first open end.

6. The device of claim 4, wherein the inflatable cuff is preformed and attached to the first open end.

7. A wound treatment device, comprising:

a flexible housing having a wall formed of nylon coated with ethyl vinyl acetate, the housing further comprising;

a first closed end;

a second end remote from the first end having an inflatable cuff for sealing against a limb; and

a treatment chamber disposed between the first and second ends for accommodating a treatment gas.

8. The device of claim 7, wherein the flexible housing comprises a first sheet attached to a second sheet at respective edges of the first and second sheets.

9. The device of claim 7, wherein the flexible housing further comprises inflatable air passages.

10. The device of claim 7, wherein the inflatable cuff comprises an outer wall, an inner wall and a sidewall coupling the inner and outer walls, thereby forming an inflatable gap therebetween.

11. The device of claim 10, wherein the inflatable cuff includes a first end adjacent the sidewall and a second end remote therefrom, wherein the second sidewall is attached to the second end of the housing.

12. A method of making a wound treatment device comprising:

providing a first sheet and a second sheet overlying the first sheet;

manipulating the first and second sheets into a housing having a generally cylindrical configuration, the housing having a first end and a second end remote therefrom;

sealing edges of the first and second sheets along longitudinal edges of the first and second sheets;

sealing the first end of the first and second sheets together to form an enclosed first end; and

forming a cuff at the second end for sealing against a limb.

13. The method of claim 12, wherein the step of sealing the edges of the first and second sheets together is preceded by a step of applying a heat sealing coating on portions of the sheets to be heat sealed.

14. The method of claim 12, wherein the step of forming the cuff includes forming an inflatable cuff having a double walled cylinder configuration having an inflatable space between the double walls.

15. The method of claim 14, further comprising coupling the inflatable cuff to a gas source.

16. The method of claim 12, further comprising sealing portions of the first and second sheets to creating inflatable air passageways.

17. The method of claim 13, wherein the heat sealing coating is selected from the group consisting of ethyl vinyl acetate and polyethylene heat sealable material.

18. A method of manufacturing a wound treatment device, comprising:

providing two sheets of polymer material;

folding the two sheets along a symmetrical axis;

coating portions of the two sheets with a heat sealable material selected from the group consisting of ethyl vinyl acetate and polyethylene; and

heat sealing the two sheets along a portion of their perimeter to form an enclosure having a closed end and an open end, the enclosure having an interior between the open and closed ends for accommodating a treatment gas.

19. The method of claim 18, further comprising forming ports on the first and second sheets for fluid communication with a gas source.

20. The method of claim 18, wherein the step of sealing the first and second sheets together includes heat sealing or radio frequency welding.

21. The method of claim 18, wherein the first and second sheets are formed of a single folded sheet.