REDUCED PRESSURE DELIVERY SYSTEM HAVING A MANUALLY-ACTIVATED PUMP FOR PROVIDING TREATMENT TO LOW-SEVERITY WOUNDS

• US 20140155849A1
• Filed: 02/04/2014
• Published: 06/05/2014
• Est. Priority Date: 10/13/2006
• Status: Active Grant

• Current Assignee: KCI Licensing Incorporated (3M Company)
• Original Assignee: KCI Licensing Incorporated (3M Company)
• Inventors: Hardman, Ian James, Heaton, Keith P.
• Granted Patent: US 9,561,312 B2
• Time in Patent Office: Days
• US Class Current: 604/321
• CPC Class Codes: A61M 1/684 bellows-type
• CPC Class Codes: A61M 1/73 comprising sensors or indicators for physical values
• CPC Class Codes: A61M 1/732 Visual indicating means for vacuum pressure
• CPC Class Codes: A61M 1/743 by changing the cross-section of the line, e.g. flow regulating valves A61M1/7413 takes precedence
• CPC Class Codes: A61M 1/78 Means for preventing overflow or contamination of the pumping systems combined with drainage containers A61M1/60
• CPC Class Codes: A61M 1/80 Suction pumps A61M1/64, A61M1/71, A61M60/00 take precedence
• CPC Class Codes: A61M 1/82 Membrane pumps, e.g. bulbs
• CPC Class Codes: A61M 1/84 Drainage tubes; Aspiration tips for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32
• CPC Class Codes: A61M 1/912 Connectors between dressing and drainage tube
• 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 1/98 Containers specifically adapted for negative pressure wound therapy
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/7536 allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes
• CPC Class Codes: A61M 27/00 Drainage appliance for wounds or the like , i.e. wound drains, implanted drains negative pressure wound therapy devices A61M1/90; implements for holding wound open A61B17/02 ; middle ear drainage A61F11/202
• CPC Class Codes: A61M 39/24 Check- or non-return valves

Abstract

A manually-activated reduced pressure treatment system includes a substantially rigid housing, and an end cap slidingly received by the housing. An inner chamber is disposed between the end cap and housing, and a volume of the inner chamber is variable in amount depending on the position of the end cap within the housing. The end cap is slidingly movable between an uncompressed position at which the volume of the inner chamber is at a maximum value and a compressed position at which the volume of the inner chamber is at a minimum value. A position indicating member is associated with the end cap and housing to indicate the position of the end cap relative to the housing at predetermined positions between the uncompressed position and the compressed position.

Claims

1. A manually-compressible pump for reduced pressure treatment, comprising:

a compressible side wall;

first and second end caps connected at opposite ends of the side wall to form an inner chamber defined by the side wall and the end caps, the inner chamber having a volume that varies from a maximum value when the side wall is in an uncompressed position to a minimum value when the side wall is in a compressed position;

a connection port disposed in one of the first and second end caps to allow fluid communication with the inner chamber;

a one-way valve disposed in one of the first end cap, the second end cap, and the side wall to allow fluid expulsion from the inner chamber; and

a hydrophobic filter in communication with the one-way valve to prevent liquid from exiting the inner chamber through the one-way valve.

2. The pump of claim 1, further comprising an odor filter in communication with the one-way valve to eliminate odors associated with fluid expelled through the one-way valve.

3. The pump of claim 1, wherein the side wall comprises a plurality of corrugations configured to bias the side wall toward the uncompressed position.

4. The pump of claim 1, wherein the side wall includes a plurality of ridges and grooves configured to bias the side wall toward the uncompressed position.

5. The pump of claim 1, further comprising a spring configured to bias the side wall toward the uncompressed position.

6. The pump of claim 1, wherein the one-way valve is disposed in the first end cap.

7. The pump of claim 6, further comprising a second one-way valve disposed in the second end cap.

8. The pump of claim 1, further comprising an absorbent foam disposed within the inner chamber.

9. The pump of claim 1, further comprising:

a housing that contains the side wall; and

a position indicating member associated with the housing and at least one of the end caps to indicate a position of the side wall at predetermined positions between the uncompressed position and the compressed position.

10. The pump of claim 9, wherein the position indicating member comprises a plurality of teeth and a pawl configured to mate with one another to indicate the position of the side wall at predetermined positions between the uncompressed position and the compressed position.

11. The pump of claim 9, wherein the position indicating member provides an audible indication of the end cap being moved from the uncompressed position toward the compressed position.

12. A low-profile reduced pressure treatment system comprising:

a reduced pressure manifold configured to be placed adjacent to a tissue site; and

a delivery tube fluidly connected to the reduced pressure manifold, the delivery tube having a substantially rectangular cross-section and a plurality of corrugations within the delivery tube to prevent collapse of the delivery tube during delivery of reduced pressure.

13. The system of claim 12, further comprising a reduced pressure source configured to be coupled to the delivery tube.

14. The system of claim 13, wherein the reduced pressure source is a manually-compressible pump comprising:

a side wall;

first and second end caps connected at opposite ends of the side wall to form an inner chamber having a volume that varies from a maximum value in an uncompressed position to a minimum value in a compressed position;

a connection port disposed in one of the first and second end caps to allow fluid communication between the inner chamber and the delivery tube;

a one-way valve disposed in one of the first end cap, the second end cap, and the side wall to allow fluid expulsion from the inner chamber; and

a hydrophobic filter in communication with the one-way valve to prevent liquid from exiting the inner chamber through the one-way valve.

15. The system according to claim 12, further comprising:

a film for sealing the reduced pressure manifold adjacent to the tissue site, the film having a first aperture for allowing fluid communication with the tissue site; and

a tube connector positioned over the first aperture, the tube connector having a second aperture configured to receive the delivery tube.

16. The system according to claim 12, wherein the reduced pressure manifold is a reticulated, open-cell foam.

17. The system according to claim 12, wherein the plurality of corrugations form a plurality of channels.

18. A pump for reduced pressure therapy, the pump comprising:

a bellows defining an inner chamber having a variable volume;

a connection port configured allow fluid communication between the inner chamber and a delivery tube;

a one-way valve configured to allow fluid expulsion from the inner chamber; and

a hydrophobic filter in communication with the one-way valve to prevent liquid from exiting the inner chamber through the one-way valve.

19. The pump of claim 18, wherein the bellows comprises a corrugated side wall.

20. The pump of claim 18, further comprising a second one-way valve configured for fluid communication from the delivery tube to the inner chamber.

21. The pump of claim 18, further comprising a second one-way valve configured to allow fluid expulsion from the inner chamber.

22. The pump of claim 18, further comprising:

a housing containing the bellows; and

a position indicating member associated with the housing to indicate predetermined positions of the bellows.

23. The pump of claim 18, further comprising:

a housing containing the bellows;

an end cap slidingly carried by the housing and positioned over the bellows;

a position indicating member operably associated with the housing and the end cap to indicate the position of the end cap relative to the housing at predetermined positions between an uncompressed position and a compressed position.

24. The pump of claim 23, wherein the position indicating member comprises a plurality of teeth and a pawl configured to mate with the plurality of teeth.

25. The pump of claim 18, wherein the bellows comprises:

a corrugated side wall; and

a first end wall and a second end wall connected at opposite ends of the corrugated side wall.

26. The pump of claim 25, wherein:

the connection port is disposed in the first end wall; and

the one-way valve is disposed in the second end wall.

27. The pump of claim 26, further comprising:

a second one-way valve disposed in the first end wall configured to allow fluid expulsion from the inner chamber;

a third one-way valve configured for fluid communication from the delivery tube to the inner chamber;

a housing containing the bellows;

an end cap slidingly carried by the housing and positioned over the second end wall; and

a plurality of teeth and a pawl operably associated with the housing and the end cap to indicate the position of the end cap relative to the housing at predetermined positions between an uncompressed position and a compressed position.

28. A method of activating a reduced pressure treatment pump, the method comprising:

compressing a flexible diaphragm to reduce a volume of a chamber fluidly connected to a tissue site;

indicating the position of the flexible diaphragm at a position between an uncompressed position and a compressed position;

determining an estimated reduced pressure provided by the compressed flexible diaphragm based on the indicated position; and

delivering reduced pressure to the tissue site.

29. The method of claim 28, further comprising recompressing the flexible diaphragm following the expansion of the flexible diaphragm.

30. The method of claim 28, further comprising collecting fluid from the tissue site.

31. The method of claim 30, further comprising recompressing the flexible diaphragm following partial filling of the chamber with fluid drawn from the tissue site.