Pump leak monitor for negative pressure wound therapy

• US 8,444,613 B2
• Filed: 12/02/2009
• Issued: 05/21/2013
• Est. Priority Date: 07/14/2009
• Status: Active Grant

• Current Assignee: Innovative Therapies Incorporated (Cardinal Health, Inc.)
• Original Assignee: Richard Vogel
• Inventors: Svedman, Pal, Xu, Tianning
• Primary Examiner(s): Zalukaeva, Tatyana
• Assistant Examiner(s): TREYGER, ILYA Y
• Application Number:
  US12/629,100
• Publication Number:
  US 20110015593A1
• Time in Patent Office: 1,266 Days
• Field of Search: 604/313, 604/315, 604/316, 604/319
• US Class Current: 604/319
• CPC Class Codes: A61M 1/74 Suction control underwater drainage A61M1/61
• CPC Class Codes: A61M 1/882 Draining devices provided with means for releasing antimicrobial or gelation agents in the drained fluid
• CPC Class Codes: A61M 1/912 Connectors between dressing and drainage tube
• CPC Class Codes: A61M 1/92 with liquid supply means
• CPC Class Codes: A61M 1/96 Suction control thereof
• CPC Class Codes: A61M 1/982 with means for detecting level of collected exudate
• CPC Class Codes: A61M 2205/15 Detection of leaks
• CPC Class Codes: A61M 2205/3368 Temperature
• CPC Class Codes: A61M 2205/3382 Upper level detectors
• CPC Class Codes: A61M 2205/8206 battery-operated

Abstract

A therapeutic device includes a fluid mover for one of raising, compressing, or transferring fluid, a therapeutic member operably connected to the fluid mover and actuated thereby, the therapeutic member operably disposably used on a patient in a manner to deliver therapy to the patient as function of actuation of the fluid mover, a controller operably associated with the fluid mover for controlling operation thereof, and a leak, blockage, temperature, voltage or current sensor operably connected to the fluid mover and the controller and to sense a leak, blockage, temperature, voltage or current in the device and send a signal to the controller whereby the controller controls the fluid mover as a function of the sensed signal.

Claims

1. A therapeutic device, which includes:

a fluid mover for one of raising, compressing, or transferring fluid which includes a first draw-down pump for generating an initial draw down vacuum and a second pump in fluid communication with said first draw-down pump for maintaining a desired vacuum and for compensating for leaks and pressure fluctuations;

a therapeutic member operably connected to said fluid mover and actuated thereby, said therapeutic member operably disposably used on a patient in a manner to deliver therapy to the patient as function of actuation of said fluid mover;

a controller operably associated with said fluid mover for controlling operation thereof, wherein said controller equipped to control pressure in accordance with sensed pressure at a vacuum and a canister for maintaining and applying a negative pressure compressible therapeutic dressing of a sterile porous substrate about a wound to form a seal about the wound through the negative pressure;

a pressure sensor operably connected to said fluid mover and said controller and to sense a leak in said device and send a signal to said controller whereby said controller controls said fluid mover as a function of said sensed signal wherein said controller first obtains electronic data which quantifies that a pump motor is running by passing said data through a low pass filter and comparing output data against a preset value D1 to determine said pump motor is running, and upon said pump motor lasting a predetermined time C1, said controller initiates said first draw down pump obtains a pressure reading Ps after running said first draw down pump for less than about 1 second, said controller initiates a pulse test and obtains a start pressure Ps and causes said first draw-down pump to runs for a predetermined time and obtains a pressure Pt and determines if Pt>

Ps+Pi, where Pi is a fixed constant indicating the a large difference and one of a full canister and line blockage;

a check valve operatively connected to said controller interposed between said therapeutic member and said fluid mover to cut off fluid communication therebetween upon pressure reaching a predetermined threshold; and

an RFID member physically associated with said canister and RFID sensor operably associated with said controller such that said controller restricts use of said canister as a function of said RFID member.

6. The disposable therapeutic device of claim 1, which includes a chargeable power source to supply power to said fluid mover.

9. The disposable therapeutic device of claim 1, wherein said controller compares pressure of a first pressure reading obtained after a pulse of pressure with a second pressure reading taken after short run time of said device and if a pressure difference exceeds a predetermined amount, a signal is generated indicating one of a full canister and line blockage.

10. The disposable therapeutic device of claim 9, wherein said short run time is less than about a second.

11. The disposable therapeutic device of claim 1, wherein said controller includes a timer for restricting said use as a function of a predetermined time.

12. The disposable therapeutic device of claim 1, which further includes an identification member such that said controller restricts use as a function of a said identification member.

13. The disposable therapeutic device of claim 1, wherein said controller enables for remotely control thereof for restricting said use.

14. The disposable therapeutic device of claim 1, which further includes a disposable container removably operably interconnected to said fluid mover and to said therapeutic member to receive waste fluid therein as a result of actuation of said fluid mover.

19. The disposable therapeutic device of claim 1, wherein said pressure sensor is operably connected to said controller and said therapeutic member such that said controller controls said fluid mover as a function of said sensed pressure.

2. A therapeutic device, which includes:

a fluid mover for one of raising, compressing, or transferring fluid which includes a first draw-down pump for generating an initial draw down vacuum and a second pump in fluid communication with said first draw-down pump for maintaining a desired vacuum and for compensating for leaks and pressure fluctuations;

a therapeutic member operably connected to said fluid mover and actuated thereby, said therapeutic member operably disposably used on a patient in a manner to deliver therapy to the patient as function of actuation of said fluid mover;

a controller operably associated with said fluid mover for controlling operation thereof, wherein said controller equipped to control pressure in accordance with sensed pressure at a vacuum and a canister for maintaining and applying a negative pressure compressible therapeutic dressing of a sterile porous substrate about a wound to form a seal about the wound through the negative pressure wherein said controller first obtains electronic data which quantifies that a pump motor is running by passing said data through a low pass filter and comparing output data against a preset value D1 to determine said pump motor is running, and upon said pump motor lasting a predetermined time C1, said controller initiates said first draw down pump obtains a pressure reading Ps after running said first draw down pump for less than about 1 second, said controller initiates a pulse test and obtains a start pressure Ps and causes said first draw-down pump to runs for a predetermined time and obtains a pressure Pt and determines if Pt>

Ps+Pi, where Pi is a fixed constant indicating the a large difference and one of a full canister and line blockage;

a pressure sensor operably connected to said fluid mover and said controller and to sense a fluid blockage in said device and send a signal to said controller whereby said controller controls said fluid mover as a function of said sensed signal;

a check valve operatively connected to said controller interposed between said therapeutic member and said fluid mover to cut off fluid communication therebetween upon pressure reaching a predetermined threshold; and

a disposable container removably operably interconnected to said fluid mover and to said therapeutic member to receive waste fluid therein as a result of actuation of said fluid mover and a solidifying agent disposed therein and a hydrophobic membrane operably disposed between said container and at least one of said pumps.

7. The disposable therapeutic device of claim 2, wherein said controller compares pressure of a first pressure reading obtained after a pulse of pressure with a second pressure reading taken after short run time of said device and if a pressure difference exceeds a predetermined amount, a signal is generated indicating one of a full canister and line blockage.

8. The disposable therapeutic device of claim 7, wherein said short run time is less than about a second.

3. A therapeutic device, which includes:

a fluid mover for one of raising, compressing, or transferring fluid which includes a first draw-down pump for generating an initial draw down vacuum and a second pump in fluid communication with said first draw-down pump for maintaining a desired vacuum and for compensating for leaks and pressure fluctuations;

a therapeutic member operably connected to said fluid mover and actuated thereby, said therapeutic member operably disposably used on a patient in a manner to deliver therapy to the patient as function of actuation of said fluid mover;

a controller operably associated with said fluid mover for controlling operation thereof, wherein said controller equipped to control pressure in accordance with sensed pressure at a vacuum and a canister for maintaining and applying a negative pressure compressible therapeutic dressing of a sterile porous substrate about a wound to form a seal about the wound through the negative pressure wherein said controller first obtains electronic data which quantifies that a pump motor is running by passing said data through a low pass filter and comparing output data against a preset value D1 to determine said pump motor is running, and upon said pump motor lasting a predetermined time C1, said controller initiates said first draw down pump obtains a pressure reading Ps after running said first draw down pump for less than about 1 second, said controller initiates a pulse test and obtains a start pressure Ps and causes said first draw-down pump to runs for a predetermined time and obtains a pressure Pt and determines if Pt>

Ps+Pi, where Pi is a fixed constant indicating the a large difference and one of a full canister and line blockage;

a temperature sensor operably connected to said controller and to sense a temperature in said device and send a signal to said controller whereby said controller controls said fluid mover as a function of said sensed signal;

a check valve operatively connected to said controller interposed between said therapeutic member and said fluid mover to cut off fluid communication therebetween upon temperature reaching a predetermined threshold;

an RFID member physically associated with said canister and RFID sensor operably associated with said controller such that said controller restricts use of said canister as a function of said RFID member; and

a disposable container removably operably interconnected to said fluid mover and to said therapeutic member to receive waste fluid therein as a result of actuation of said fluid mover and a solidifying agent disposed therein and a hydrophobic membrane operably disposed between said container and at least one of said pumps.

15. The disposable therapeutic device of claim 3, wherein said controller compares pressure of a first pressure reading obtained after a pulse of pressure with a second pressure reading taken after short run time of said device and if a pressure difference exceeds a predetermined amount, a signal is generated indicating one of a full canister and line blockage.

16. The disposable therapeutic device of claim 15, wherein said short run time is less than about a second.

4. A therapeutic device, which includes:

a fluid mover for one of raising, compressing, or transferring fluid;

a therapeutic member operably connected to said fluid mover and actuated thereby, said therapeutic member operably disposably used on a patient in a manner to deliver therapy to the patient as function of actuation of said fluid mover;

a controller operably associated with said fluid mover for controlling operation thereof, wherein said controller equipped to control pressure in accordance with sensed pressure at a vacuum and a canister for maintaining and applying a negative pressure compressible therapeutic dressing of a sterile porous substrate about a wound to form a seal about the wound through the negative pressure wherein said controller first obtains electronic data which quantifies that a pump motor is running by passing said data through a low pass filter and comparing output data against a preset value D1 to determine said pump motor is running, and upon said pump motor lasting a predetermined time C1, said controller initiates said first draw down pump obtains a pressure reading Ps after running said first draw down pump for less than about 1 second, said controller initiates a pulse test and obtains a start pressure Ps and causes said first draw-down pump to runs for a predetermined time and obtains a pressure Pt and determines if Pt>

Ps+Pi, where Pi is a fixed constant indicating the a large difference and one of a full canister and line blockage;

a voltage sensor operably connected to said device and said controller and to sense a voltage in said device and send a signal to said controller whereby said controller controls said fluid mover as a function of said sensed signal;

a check valve operatively connected to said controller interposed between said therapeutic member and said fluid mover to cut off fluid communication therebetween upon voltage reaching a predetermined threshold;

an RFID member physically associated with said canister and RFID sensor operably associated with said controller such that said controller restricts use of said canister as a function of said RFID member; and

a disposable container removably operably interconnected to said fluid mover and to said therapeutic member to receive waste fluid therein as a result of actuation of said fluid mover and a solidifying agent disposed therein and a hydrophobic membrane operably disposed between said container and at least one of said pumps.

17. The disposable therapeutic device of claim 4, wherein said controller compares pressure of a first pressure reading obtained after a pulse of pressure with a second pressure reading taken after short run time of said device and if a pressure difference exceeds a predetermined amount, a signal is generated indicating one of a full canister and line blockage.

18. The disposable therapeutic device of claim 17, wherein said short run time is less than about a second.

5. A therapeutic device, which includes:

a fluid mover for one of raising, compressing, or transferring fluid which includes a first draw-down pump for generating an initial draw down vacuum and a second pump in fluid communication with said first draw-down pump for maintaining a desired vacuum and for compensating for leaks and pressure fluctuations;

a therapeutic member operably connected to said fluid mover and actuated thereby, said therapeutic member operably disposably used on a patient in a manner to deliver therapy to the patient as function of actuation of said fluid mover;

a controller operably associated with said fluid mover for controlling operation thereof wherein said controller equipped to control pressure in accordance with sensed pressure at a vacuum and a canister for maintaining and applying a negative pressure compressible therapeutic dressing of a sterile porous substrate about a wound to form a seal about the wound through the negative pressure wherein said controller first obtains electronic data which quantifies that a pump motor is running by passing said data through a low pass filter and comparing output data against a preset value D1 to determine said pump motor is running, and upon said pump motor lasting a predetermined time C1, said controller initiates said first draw down pump obtains a pressure reading Ps after running said first draw down pump for less than about 1 second, said controller initiates a pulse test and obtains a start pressure Ps and causes said first draw-down pump to runs for a predetermined time and obtains a pressure Pt and determines if Pt>

Ps+Pi, where Pi is a fixed constant indicating the a large difference and one of a full canister and line blockage;

a current sensor operably connected to said device and said controller and to sense current in said device and send a signal to said controller whereby said controller controls said fluid mover as a function of said sensed signal; and

a check valve operatively connected to said controller interposed between said therapeutic member and said fluid mover to cut off fluid communication therebetween upon current reaching a predetermined threshold;

an RFID member physically associated with said canister and RFID sensor operably associated with said controller such that said controller restricts use of said canister as a function of said RFID member; and

a disposable container removably operably interconnected to said fluid mover and to said therapeutic member to receive waste fluid therein as a result of actuation of said fluid mover and a solidifying agent disposed therein and a hydrophobic membrane operably disposed between said container and at least one of said pumps.

20. The disposable therapeutic device of claim 5, wherein said controller compares pressure of a first pressure reading obtained after a pulse of pressure with a second pressure reading taken after short run time of said device and if a pressure difference exceeds a predetermined amount, a signal is generated indicating one of a full canister and line blockage.

21. The disposable therapeutic device of claim 20, wherein said short run time is less than about a second.