Reduced pressure delivery system having a manually-activated pump for providing treatment to low-severity wounds

Patent metadata

Field	Value
Publication number	US-9561312-B2
Application number	US-201414172732-A
Country	US
Kind code	B2
Filing date	Feb 4, 2014
Priority date	Oct 13, 2006
Publication date	Feb 7, 2017
Grant date	Feb 7, 2017

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.

First claim

What is claimed is:

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 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.

13. The pump of claim 12 , wherein the bellows comprises a corrugated side wall.

14. The pump of claim 12 , further comprising a second one-way valve configured for fluid communication from the delivery tube to the inner chamber.

15. The pump of claim 12 , further comprising a second one-way valve configured to allow fluid expulsion from the inner chamber.

16. The pump of claim 12 , further comprising:
a housing containing the bellows; and
a position indicating member associated with the housing to indicate predetermined positions of the bellows.

17. The pump of claim 12 , 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.

18. The pump of claim 17 , wherein the position indicating member comprises a plurality of teeth and a pawl configured to mate with the plurality of teeth.

19. The pump of claim 12 , 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.

20. The pump of claim 19 , wherein:
the connection port is disposed in the first end wall; and
the one-way valve is disposed in the second end wall.

21. The pump of claim 20 , 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.

Assignees

• Kci Licensing Inc

Inventors

• Heaton Keith P
• Hardman Ian James

Classifications

• A61M2205/581

  by audible feedback · CPC title

• A61F13/0253

  characterized by the adhesive material · CPC title

• A61F13/0263

  especially adapted for island dressings · CPC title

• A61M2205/7536

  allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes · CPC title

• A61M39/24

  Check- or non-return valves · CPC title