DEVICE LONGEVITY PREDICTION FOR A DEVICE HAVING VARIABLE ENERGY CONSUMPTION

• US 20120265266A1
• Filed: 04/14/2011
• Published: 10/18/2012
• Est. Priority Date: 04/14/2011
• Status: Active Grant

• Current Assignee: LivaNova USA, Inc. (LivaNova Plc)
• Original Assignee: Cyberonics, Inc
• Inventors: COLBORN, John C.
• Granted Patent: US 8,761,884 B2
• Time in Patent Office: Days
• US Class Current: 607/45
• CPC Class Codes: A61N 1/36053 adapted for vagal stimulation A61N1/36114 takes precedence
• CPC Class Codes: A61N 1/36064 Epilepsy
• CPC Class Codes: A61N 1/36114 Cardiac control, e.g. by vagal stimulation stimulating the heart A61N1/362
• CPC Class Codes: A61N 1/36135 using physiological parameters
• CPC Class Codes: A61N 1/36139 with automatic adjustment
• CPC Class Codes: A61N 1/36146 specified by the stimulation parameters
• CPC Class Codes: A61N 1/37235 Aspects of the external programmer
• CPC Class Codes: A61N 1/37247 User interfaces, e.g. input or presentation means
• CPC Class Codes: A61N 1/37264 Changing the program; Upgrading firmware
• CPC Class Codes: A61N 1/378 Electrical supply

Abstract

A system and method for estimating the longevity of an implantable medical device (IMD). In one embodiment of a method for estimating a life of a power source of an implantable medical device, a first life estimate of the power source is determined based on a first open-loop value corresponding to an open-loop parameter for open-loop therapy delivery, a first closed loop value corresponding to a closed-loop parameter for closed-loop therapy delivery, and prior usage data corresponding to prior therapy delivery. The first life estimate of the power source is displayed. The first life estimate displayed includes a first open-loop portion associated with open-loop therapy delivery and a first closed-loop portion associated with closed-loop therapy delivery.

Claims

1. A method for estimating a life of a power source of an implantable medical device (IMD), the method comprising:

determining a first life estimate of the power source based on a first open-loop value corresponding to an open-loop parameter for open-loop therapy delivery, a first closed loop value corresponding to a closed-loop parameter for closed-loop therapy delivery, and prior usage data corresponding to prior therapy delivery; and

displaying the first life estimate of the power source including a first open-loop portion associated with open-loop therapy delivery and a first closed-loop portion associated with closed-loop therapy delivery.

2. The method of claim 1, further comprising:

receiving a second closed-loop value corresponding to the closed-loop parameter, wherein the second closed-loop value is different from the first closed-loop value;

determining a second life estimate of the power source based on the first open-loop value, the second closed loop value, and the prior usage data; and

displaying the second life estimate of the power source including a second closed-loop portion and the first open-loop portion, wherein the second closed-loop portion is different from the first closed loop portion.

3. The method of claim 1, further comprising:

receiving a second open-loop value corresponding to the open-loop parameter, wherein the second open-loop value is different from the first open-loop value;

determining a second life estimate of the power source based on the second open-loop value, the first closed loop value, and the prior usage data; and

displaying the second life estimate of the power source, the second life estimate having a first closed-loop portion and the second open-loop portion, wherein the second open-loop portion is different from the first open-loop portion.

4. The method of claim 1, further comprising:

receiving a second open-loop value corresponding to the open-loop parameter, wherein the second open-loop value is different from the first open-loop value;

receiving a second closed-loop value corresponding to the closed-loop parameter, wherein the second closed-loop value is different from the first closed-loop value;

determining a second life estimate of the power source based on the second open-loop value, the second closed loop value, and the prior usage data.

5. The method of claim 4, further comprising:

displaying the second life estimate of the power source including a second closed-loop portion and a second open-loop portion, wherein the second open-loop portion is different from the first open-loop portion and the second closed-loop portion is different from the first closed loop portion.

6. The method of claim 5, wherein the first life estimate and the second life estimate are displayed concurrently.

7. The method of claim 1, wherein the first life estimate comprises a first estimate of the entire life of the power source.

8. The method of claim 1, wherein the closed-loop parameter includes at least a sensitivity of a detection algorithm operative to trigger closed-loop therapy delivery, a closed-loop duty cycle, and a closed-loop amplitude of the closed-loop therapy.

9. The method of claim 1, wherein the prior usage data includes at least one of prior usage rates of the power source and a number of closed loop therapies delivered.

10. The method of claim 1, wherein the open-loop therapy delivery and the closed loop therapy delivery comprise delivery of electrical stimulation to a structure in a patent'"'"'s body.

11. The method of claim 1, wherein determining the first life estimate of the power source is further based on manually-initiated therapy delivery, wherein displaying the first life estimate further includes a first manually-initiated portion corresponding to the manually initiated therapy delivery.

12. The method of claim 11, wherein the prior usage data includes a number of manually-initiated therapies delivered.

13. The method of claim 1, further comprising:

displaying a first control feature for selectively enabling and disabling closed-loop therapy delivery;

displaying a second control feature for selectively enabling and disabling manually-initiated therapy delivery; and

displaying a third control feature for receiving a sensitivity level of an event detection algorithm operative to trigger closed-loop therapy delivery.

14. A system for estimating a life of a power source of an implantable medical device (IMD), the system comprising:

therapy logic configured to provide open-loop therapy and closed-loop therapy to the patient;

detection logic coupled to the therapy logic, the detection logic having an algorithm configured to detect an event for triggering closed-loop therapy, and to record detected events; and

a control device coupled to the therapy logic and the detection logic, the control device configured to provide a first operable life estimate of the power source of the IMD, wherein the first operable life estimate identifies a first open-loop therapy portion of the first operable life estimate and a first closed-loop therapy portion of the first operable life estimate.

15. The system of claim 14, wherein the therapy logic is configured to enable a user to selectively enable and disable application of closed-loop therapy and open-loop therapy.

16. The system of claim 14, wherein the therapy logic is further configured to provide manually-initiated therapy delivery to the patient.

17. The system of claim 14, wherein the first operable life estimate of the power source further identifies a first manually-initiated therapy portion of the power source life.

18. The system of claim 14, wherein the control device is configured to update the first operable life estimate based on changing a parameter value corresponding to at least one of the open-loop therapy and the closed-loop therapy.

19. The system of claim 14, wherein the control device is configured to retrieve control information from the IMD and to provide the estimate of operable life based on the control information.

20. The system of claim 19, wherein the control information specifies a period and therapy level for open-loop therapy and specifies a detection level and a therapy level for closed-loop stimulation.

21. The system of claim 14, wherein the estimate of operable life represents the entire life of the power source.

22. The system of claim 14, wherein the control device is configured to store a plurality of operable life estimates, each estimate corresponding to a set of control information provided to the stimulation logic and the detection logic over the life of the power source, and to generate a display of the plurality of operable life estimates.

23. A method, comprising:

determining a first operable life estimate of an implantable medical device (IMD), the first operable life estimate based on a first operable life reduction attributable to a number of detected events operative to trigger closed-loop therapy and a second operable life reduction attributable to open-loop therapy;

identifying, for the first operable life estimate, a first open-loop therapy portion associated with the second operable life reduction and a first closed-loop therapy portion associated with the first operable life reduction.

24. The method of claim 23, further comprising:

displaying the first operable life estimate including the first open-loop therapy portion and the first closed-loop therapy portion on an external device.

25. The method of claim 23, wherein the first operable life estimate is further based on a third operable life reduction attributable to a number of manually-initiated therapy deliveries.

26. The method of claim 25, further comprising:

identifying, for the first operable life estimate, a first manually-initiated therapy portion associated with the third operable life reduction; and

displaying the first operable life estimate including the first open-loop therapy portion, the first closed-loop therapy portion, and the first manually-initiated therapy portion on an external device.

27. The method of claim 23, further comprising:

changing a value at the IMD, the value affecting any of an open-loop therapy level, an open-loop therapy rate, a closed-loop detection level, and a closed-loop therapy level;

determining a second operable life estimate of the IMD based on the changed value;

identifying, for the second operable life estimate, a second open-loop therapy portion and a second closed-loop therapy portion based on the changed value; and

displaying the second operable life estimate including the second open-loop therapy portion and the second closed-loop therapy portion on an external device.

28. The method of claim 27, further comprising:

displaying the first operable life estimate including the first open-loop therapy portion and the first closed-loop therapy portion on the external device concurrently with the second operable life estimate including the second open-loop therapy portion and the second closed-loop therapy portion.

29. The method of claim 28, wherein the first and second operable life estimates are displayed prior to the IMD operating with the changed value.

30. The method of claim 23, further comprising:

storing a plurality of operable life estimates, each estimate corresponding to a different programming of the IMD over the life of the IMD; and

displaying the plurality of operable life estimates.

31. An apparatus for controlling an implantable medical device (IMD), the IMD having a power source, the apparatus comprising:

a processor operative to generate an operable life estimate for the power source based on a number of open-loop therapies delivered during a first time period, a number of closed-loop therapy detection events during the first time period, a charge consumption associated with each open-loop therapy delivery, and a charge consumption associated with each closed-loop therapy delivery, wherein the operable life estimate comprises an open-loop therapy portion corresponding to operable life of the IMD used for open-loop therapy delivery and a closed-loop therapy portion corresponding to the operable life of the IMD used for closed-loop therapy delivery; and

a display device coupled to the processor, the display device operative to display the operable life estimate generated by the processor including the open-loop therapy portion and the closed-loop therapy portion.

32. The apparatus of claim 31, wherein the operable life estimate further comprises a manually-initiated therapy portion corresponding to the operable life of the IMD used for manually-initiated therapy delivery.

33. The apparatus of claim 31, wherein the processor is further operative to update the operable life estimate based on a change in one or more values affecting at least one of the open-loop therapy delivery and the closed-loop therapy delivery.

34. The apparatus of claim 33, wherein the display device is operative to display the updated operable life estimate concurrently with the operable life estimate.

35. The apparatus of claim 34, wherein the updated operable life estimate and the operable life estimate are concurrently displayed prior to operation of the IMD with the changed one or more values.