System and method for locating fluid leaks at a drape of a reduced pressure delivery system

• US 8,061,360 B2
• Filed: 09/18/2007
• Issued: 11/22/2011
• Est. Priority Date: 09/19/2006
• Status: Active Grant

• Current Assignee: Solventum Intellectual Properties Company (Solventum Corp.)
• Original Assignee: KCI Licensing Incorporated (3M Company)
• Inventors: Blandford, David Robson, Robinson, Timothy Mark, Beard, Mark Stephen James, Locke, Christopher Brian
• Primary Examiner(s): Lucchesi; Nicholas D
• Assistant Examiner(s): PATEL, PRITESH ASHOK
• Application Number:
  US11/901,657
• Publication Number:
  US 20080071214A1
• Time in Patent Office: 1,526 Days
• Field of Search: 604/543, 604/147, 604/315, 604/324, 434/268
• US Class Current: 128/898
• CPC Class Codes: A61H 2201/5056 pneumatically controlled
• CPC Class Codes: A61H 9/0057 Suction suction kneading A61H7/008
• CPC Class Codes: A61M 1/60 Containers for suction drainage, adapted to be used with an external suction source containers not adapted for subjection to vacuum A61M1/69
• CPC Class Codes: A61M 1/604 Bag or liner in a rigid container, with suction applied to both
• CPC Class Codes: A61M 1/71 Suction drainage systems containers therefor A61M1/60, A61M1/64; negative pressure wound therapy systems A61M1/90
• CPC Class Codes: A61M 1/73 comprising sensors or indicators for physical values
• CPC Class Codes: A61M 1/74 Suction control underwater drainage A61M1/61
• CPC Class Codes: A61M 1/96 Suction control thereof
• CPC Class Codes: A61M 2205/15 Detection of leaks
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/33 Controlling, regulating or measuring
• CPC Class Codes: A61M 2205/3327 Measuring
• CPC Class Codes: A61M 2205/3331 Pressure; Flow
• CPC Class Codes: A61M 2205/3334 Measuring or controlling the flow rate
• CPC Class Codes: A61M 2205/3337 Controlling, regulating pressure or flow by means of a valve by-passing a pump
• CPC Class Codes: A61M 2205/3344 Measuring or controlling pressure at the body treatment site
• CPC Class Codes: A61M 2205/3379 Masses, volumes, levels of fluids in reservoirs, flow rates
• CPC Class Codes: A61M 2205/43 making noise when used correctly
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/502 User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 2205/581 : by audible feedback
• CPC Class Codes: A61M 2205/583 : by visual feedback
• CPC Class Codes: A61M 5/1415 : Stands, brackets or the like for supporting infusion accessories
• CPC Class Codes: A61N 1/0468 : Specially adapted for promoting wound healing
• CPC Class Codes: A61N 2005/0661 : ultraviolet
• CPC Class Codes: A61N 5/0616 : Skin treatment other than tanning
• CPC Class Codes: F16M 11/046 : adapted to upward-downward translation movement
• CPC Class Codes: F16M 11/048 : adapted to forward-backward translation movement
• CPC Class Codes: F16M 13/02 : for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
• CPC Class Codes: F16M 2200/027 : by friction
• CPC Class Codes: G01F 23/14 : by measurement of pressure

Abstract

A system and method for performing tissue therapy may include applying a reduced pressure to a tissue site of a patient. A fluid parameter associated with applying a reduced pressureto the tissue site may be sensed. An audible fluid leak location sound may be generated in response to sensing the fluid parameter. The audible fluid leak location sound may be altered in response to sensing that the fluid parameter changes. By altering the audible fluid leak location sound in response to sensing a change of the fluid parameter, a clinician may detect location of a fluid leak at the drape by applying force to the drape. The force applied to the drape may be a clinician pressing a finger onto an edge of the drape.

Claims

1. A method for performing tissue therapy, comprising:

applying a reduced pressure to a tissue site of a patient;

sensing a fluid parameter associated with applying the reduced pressure to the tissue site;

determining that a fluid leak exists in response to sensing the fluid parameter;

generating an audible fluid leak location sound in response to determining that a fluid leak exists, the audible fluid leak location sound having an ON state and an OFF state, and being variable in the ON state; and

altering the audible fluid leak location sound while in the ON state in response to sensing that the fluid parameter changes.

2. The method according to claim 1, wherein altering the audible fluid leak location sound includes altering an audible frequency of the audible fluid leak location sound in response to sensing an altered fluid parameter.

3. The method according to claim 1, wherein altering the audible fluid leak location sound includes altering duration of the audible fluid leak location sound in response to sensing an altered fluid parameter.

4. The method according to claim 1, wherein altering the audible fluid leak location sound includes altering amplitude of the audible fluid leak location sound in response to sensing an altered fluid parameter.

5. The method according to claim 1, further comprising:

determining that the fluid parameter crosses a threshold value; and

generating an audible alarm signal in response to determining that the fluid parameter crossed the threshold value.

6. The method according to claim 1, further comprising displaying a graphical user interface that includes a selectable element that, when selected, causes a fluid leak location detection mode to be entered.

7. The method according to claim 6, further comprising generating a graphical indicator indicative of the fluid parameter and changes of the fluid parameter while in the fluid leak location detection mode.

8. The method according to claim 1, further comprising:

forming a seal with tissue of the patient to form a reduced pressure with the tissue site; and

initiating the audible fluid leak location signal.

9. The method according to claim 1, further comprising selectably toggling the fluid leak location signal on and off.

10. The method according to claim 1, wherein sensing the fluid parameter includes electronically sensing an airflow or a pressure.

11. The method according to claim 1, wherein altering the fluid leak location sound indicates whether a fluid leak corresponding to the sensed fluid parameter is increasing or decreasing.

29. The method according to claim 1, wherein applying a reduced pressure includes applying a reduced pressure to the tissue site of the patient to reach a steady-state reduced pressure, and wherein generating the audible fluid leak location sound includes generating an audible fluid leak location sound in response to sensing the fluid parameter changes from the steady-state reduced pressure.

32. The method according to claim 1, wherein altering the audible fluid leak location sound includes altering frequency, volume, or tone speed of the audible fluid leak location sound in response to sensing the fluid parameter changing.

33. The method according to claim 32, wherein altering the audible fluid leak location sound includes continuously altering the audible fluid leak location sound in response to sensing the fluid parameter continuously changing.

12. A method for determining a fluid leak of a reduced pressure delivery system at an interface between a tissue of a patient and a drape of the reduced pressure delivery system, said method comprising:

determining that a fluid leak exists at the interface between the tissue site of the patient and the drape;

listening to an audible sound generated in response to sensing a fluid parameter indicating the fluid leak at the interface, the audible sound having an ON state and an OFF state, and being variable in the ON state;

applying force to the drape;

listening for a change in the audible sound generated while in the ON state in response to the fluid parameter changing based on application of the force to the drape;

determining a location of the fluid leak at the interface between the tissue of the patient and the drape based on the change in the audible sound, the audible sound indicating when the fluid leak increases or decreases; and

reducing the fluid leak at the location determined at the interface between the tissue of the patient and the drape.

13. The method according to claim 12, wherein the sensing is performed electronically utilizing an airflow or a pressure, and wherein the fluid leak is a gas leak.

14. The method according to claim 12, wherein listening for a change in the audible sound includes listening for an audible frequency change of the audible sound.

15. The method according to claim 12, wherein listening for a change in the audible sound includes listening for a duration change of the audible sound.

16. The method according to claim 12, wherein listening for a change in the audible sound includes listening for an amplitude change of the audible sound.

17. The method according to claim 12, wherein determining that a fluid leak exists at the interface includes hearing an audible alarm sound generated by the reduced pressure delivery system.

18. The method according to claim 12, wherein determining the location of the fluid leak at the interface includes viewing a graphical image displayed by the reduced pressure delivery system indicative of a fluid leak change in response to applying force to the drape to determine the location of the fluid leak.

19. The method according to claim 18, wherein watching the graphical image includes watching for the graphical image to change at least one graphical characteristic.

30. The method according to claim 12, further comprising applying a reduced pressure to a tissue site of the patient to reach a steady-state reduced pressure, and wherein determining that the fluid leak exists includes determining that the fluid leak exists after reaching the steady-state reduced pressure at the interface between the tissue site of the patient and the drape.

34. The method according to claim 12, wherein listening for a change in the audible sound includes listening for a change in frequency, volume, or tone speed of the audible sound in response to sensing the fluid parameter changing.

35. The method according to claim 34, wherein listening for a change in the audible sound includes listening for a continuous change in the audible sound in response to sensing the fluid parameter continuously changing.

20. A method for determining a fluid leak of a reduced pressure delivery system at an interface between a tissue of a patient and a drape of the reduced pressure delivery system, said method comprising:

determining that a fluid leak at the interface between a tissue site of the patient and the drape, an audible sound having an ON state and an OFF state, and being variable in the ON state;

listening to the audible sound generated in response to sensing a fluid parameter indicating the fluid leak at the interface;

applying force to a first region of the drape;

listening for a change in the audible sound generated while in the ON state in response to the fluid parameter changing in response to applying the force to the first region of the drape, the generated audible sound indicating when the fluid leak increases or decreases;

if the generated audible sound changes while in the ON state in response to applying the force to the first region of the drape, correcting the first region of the drape to reduce the fluid leak;

otherwise, applying a force to a second region of the drape;

listening for a change in the generated audible sound while in the ON state in response to the fluid parameter changing in response to applying the force to the second region of the drape; and

if the generated audible sound changes while in the ON state in response to applying the force to the second region of the drape, then correcting the second region of the drape to reduce the fluid leak.

21. The method according to claim 20, wherein the sensing is performed electronically utilizing an airflow or a pressure, wherein the audible sound is generated by the reduced pressure delivery system, and wherein the fluid leak is a gas leak.

22. The method according to claim 20, further comprising:

determining that the generated audible sound does not change in response to applying the force to the second region of the drape;

applying force to at least one different region of the drape until the generated audible sound changes; and

in response to hearing the generated audible sound change, correcting the at least one region of the drape to which the force is being applied to reduce the fluid leak.

23. The method according to claim 20, wherein listening for a change in the generated audible sound includes listening for an audible frequency change of the generated audible sound.

24. The method according to claim 20, wherein listening for a change in the generated audible sound includes listening for a duration change of the generated audible sound.

25. The method according to claim 20, wherein listening for a change in the generated audible sound includes listening for an amplitude change of the generated audible sound.

26. The method according to claim 20, wherein determining that a fluid leak exists at the interface includes hearing an audible alarm sound.

27. The method according to claim 20, wherein determining the location of the fluid leak at the interface includes viewing a graphical image displayed that is indicative of a fluid leak change in response to applying force to the drape to determine the location of the fluid leak.

28. The method according to claim 27, wherein viewing the graphical image includes viewing for the graphical image to change at least one graphical characteristic.

31. The method according to claim 20, further comprising applying a reduced pressure to a tissue site of the patient to reach a steady-state reduced pressure, and wherein determining that the fluid leak exists includes determining that a fluid leak exists after reaching the steady-state reduced pressure at the interface between a tissue site of the patient and the drape.

36. The method according to claim 20, wherein listening for a change in the audible sound includes listening for a change in frequency, volume, or tone speed of the audible sound in response to sensing the fluid parameter changing.

37. The method according to claim 36, wherein listening for a change in the audible sound includes listening for a continuous change in the audible sound in response to sensing the fluid parameter continuously changing.