MANUALLY POWERED, REGULATED, NEGATIVE PRESSURE PUMP WITH ADAPTER FOR EXTERNAL PRESSURE SOURCE

• US 20150018784A1
• Filed: 06/23/2014
• Published: 01/15/2015
• Est. Priority Date: 07/10/2013
• Status: Active Grant

• Current Assignee: Solventum Intellectual Properties Company (Solventum Corp.)
• Original Assignee: KCI Licensing Incorporated (3M Company)
• Inventors: Coulthard, Richard Daniel John, Locke, Christopher Brian
• Granted Patent: US 10,016,539 B2
• Time in Patent Office: Days
• US Class Current: 604/319
• CPC Class Codes: A61M 1/74 Suction control underwater drainage A61M1/61
• 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 1/81 Piston pumps, e.g. syringes
• CPC Class Codes: A61M 1/912 Connectors between dressing and drainage tube
• CPC Class Codes: A61M 1/916 specially adapted for deep wounds
• CPC Class Codes: A61M 1/92 with liquid supply means
• CPC Class Codes: A61M 1/96 Suction control thereof
• 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 1/985 the dressing itself forming the collection container
• CPC Class Codes: A61M 2205/071 hand operated
• CPC Class Codes: A61M 2205/073 Syringe, piston type
• CPC Class Codes: A61M 2205/581 by audible feedback

Abstract

A manually-actuated pump for applying reduced-pressure therapy includes a charging chamber and a regulated chamber. The charging chamber has a closed end. A regulator passage extends between the charging chamber and the regulated chamber, and a valve body is adapted to control fluid communication through the regulator passage. A regulator spring is engaged with the valve body to bias the valve body against a differential between a pressure in the regulated chamber and an ambient pressure. The manually-actuated pump also includes an outlet port coupled to the regulated chamber; and a valve assembly coupled to the charging chamber to permit fluid flow through the closed end of the charging chamber.

Claims

1. A manually-actuated pump for applying reduced-pressure therapy, comprising:

a charging chamber having a closed end;

a regulated chamber;

a regulator passage between the charging chamber and the regulated chamber;

a valve body adapted to control fluid communication through the regulator passage;

a regulator spring engaged with the valve body to bias the valve body against a differential between a pressure in the regulated chamber and an ambient pressure;

an outlet port coupled to the regulated chamber; and

a valve assembly coupled to the charging chamber to permit fluid flow through the closed end of the charging chamber.

2. The manually-actuated pump of claim 1, wherein the valve assembly permits fluid flow from the charging chamber through the valve assembly in response to a supplied pressure that is less than the pressure in the charging chamber.

3. The manually actuated pump of claim 2, wherein the supplied pressure is in a range of about −

125 mm Hg to about −

600 mm Hg.

4. The manually-actuated pump of claim 2, wherein the supplied pressure is about −

125 mm Hg.

5. The manually-actuated pump of claim 2, wherein the supplied pressure is about −

600 mm Hg.

6. The manually-actuated reduced pressure pump of claim 1, wherein the valve assembly comprises a duckbill valve.

7. The manually-actuated reduced pressure pump of claim 1, wherein the valve assembly comprises a butterfly valve.

8. The manually-actuated reduced pressure pump of claim 1, wherein the valve assembly comprises an umbrella valve.

9. The manually-actuated reduced pressure pump of claim 1, wherein the valve assembly comprises a sprung-ball valve.

10. The manually-actuated pump of claim 1, wherein the closed end has an aperture and the valve assembly comprises:

a valve adapter disposed within the aperture and having a chamber flange and a barrel flange, the chamber flange disposed within the charging chamber and the barrel flange disposed adjacent the closed end and external to the charging chamber;

a high pressure adapter coupled to the valve adapter and having a nipple;

a valve having a connector and a flattened end, the connector coupled to the nipple of the high pressure adapter; and

wherein the flattened end has a slit configured to permit fluid flow out of the charging chamber.

11. The manually-actuated pump of claim 1, wherein the valve assembly is adapted to fluidly coupled to an external reduced-pressure source.

12. A reduced pressure treatment apparatus comprising:

a piston chamber having a closed end;

a piston disposed within the piston chamber and being movable between an extended position and a compressed position;

a charging chamber disposed between the piston and the closed end;

a biasing member adapted to bias the piston toward the extended position;

a valve member adapted to allow fluid to exit the charging chamber as the piston moves toward the compressed position and to prevent fluid from entering the charging chamber as the piston moves toward the extended position;

a regulated chamber;

a passage between the regulated chamber and the charging chamber;

a regulator member to regulate fluid communication through the passage between the charging chamber and the regulated chamber; and

a valve assembly coupled to the charging chamber to permit fluid flow through the closed end of the charging chamber.

13. The reduced pressure treatment apparatus of claim 12, wherein the valve assembly permits fluid flow from the charging chamber through the valve assembly in response to a supplied pressure that is less than the pressure in the charging chamber.

14. The reduced pressure treatment apparatus of claim 13, wherein the supplied pressure is in a range of about −

125 mm Hg to about −

600 mm Hg.

15. The reduced pressure treatment apparatus of claim 13, wherein the supplied pressure is about −

125 mm Hg.

16. The reduced pressure treatment apparatus of claim 13, wherein the supplied pressure is about −

600 mm Hg.

17. The reduced pressure treatment apparatus of claim 12, wherein the valve assembly comprises a duckbill valve.

18. The reduced pressure treatment apparatus of claim 12, wherein the valve assembly comprises a butterfly valve.

19. The reduced pressure treatment apparatus of claim 12, wherein the valve assembly comprises an umbrella valve.

20. The reduced pressure treatment apparatus of claim 12, wherein the valve assembly comprises a sprung-ball valve.

21. The reduced pressure treatment apparatus of claim 12, wherein the closed end has an aperture and the valve assembly comprises:

a valve adapter disposed within the aperture and having a chamber flange and a barrel flange, the chamber flange disposed within the charging chamber and the barrel flange disposed adjacent the closed end and external to the charging chamber;

a high pressure adapter coupled to the valve adapter and having a nipple;

a valve having a connector and a flattened end, the connector coupled to the nipple of the high pressure adapter; and

wherein the flattened end has a slit configured to permit fluid flow out of the charging chamber.

22. The manually-actuated pump of claim 12, wherein the valve assembly is adapted to fluidly coupled to an external reduced-pressure source.

23. A reduced pressure treatment system comprising:

a manifold adapted to be positioned at a tissue site;

a regulated chamber in fluid communication with the manifold and adapted to deliver a desired therapy pressure to the tissue site;

a charging chamber having a closed end and adapted to store a charging pressure that is less than the desired therapy pressure;

a passage adapted to provide fluid communication between the regulated chamber and the charging chamber; and

a valve body operably associated with the passage to substantially reduce fluid communication through the passage if a pressure in the regulated chamber is less than or equal to the desired therapy pressure and to allow fluid communication through the passage if the pressure in the regulated chamber exceeds the desired therapy pressure;

a valve assembly coupled to the closed end of the charging chamber and adapted to be fluidly coupled to an external reduced-pressure source to permit fluid flow out of the charging chamber in response to a supplied pressure provided by the external reduced pressure source that is less than the pressure in the charging chamber.

24. The system of claim 23, wherein the supplied pressure is in a range of about −

125 mm Hg to about −

600 mm Hg.

25. The system of claim 23, wherein the supplied pressure is about −

125 mm Hg.

26. The system of claim 23, wherein the supplied pressure is about −

600 mm Hg.

27. The system of claim 23, wherein the valve assembly comprises a duckbill valve.

28. The system of claim 23, wherein the valve assembly comprises a butterfly valve.

29. The system of claim 23, wherein the valve assembly comprises an umbrella valve.

30. The system of claim 23, wherein the valve assembly comprises a sprung-ball valve.

31. The system of claim 23, wherein the closed end has an aperture and the valve assembly comprises:

a valve adapter disposed within the aperture and having a chamber flange and a barrel flange, the chamber flange disposed within the charging chamber and the barrel flange disposed adjacent the closed end and external to the charging chamber;

a high pressure adapter coupled to the valve adapter and having a nipple;

a valve having a connector and a flattened end, the connector coupled to the nipple of the high pressure adapter; and

wherein the flattened end has a slit configured to permit fluid flow out of the charging chamber.

32. The system of claim 23, wherein the external reduced-pressure source is a wall-suction source.

33. The system of claim 23, wherein the external reduced-pressure source is an electrically driven pump.

34. A method of providing reduced pressure treatment to a tissue site, the method comprising:

storing a charging pressure within a charging chamber with an external reduced-pressure source;

delivering a desired therapy pressure from a regulated chamber to the tissue site; and

if a pressure within the regulated chamber exceeds the desired therapy pressure, reducing the pressure within the regulated chamber by allowing fluid communication between the charging chamber and the regulated chamber.

35. The method of claim 34 wherein the external reduced-pressure source is a wall-suction source.

36. The method of claim 34 wherein the external reduced-pressure source is an electrically driven pump.

37. The method of claim 34 wherein storing a charging pressure comprises coupling the external reduced-pressure source to a closed end of the charging chamber and opening a valve assembly to allow the flow of reduced pressure.

38. (canceled)