System and method for supplying a patient reminder alert from an implantable medical device

• US 20040215269A1
• Filed: 04/25/2003
• Published: 10/28/2004
• Est. Priority Date: 04/25/2003
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Burnes, John E., Mongeon, Luc R.
• Granted Patent: US 7,248,918 B2
• Time in Patent Office: Days
• US Class Current: 607/27
• CPC Class Codes: A61N 1/08 Arrangements or circuits for monitoring, protecting, controlling or indicating for external stimulators A61N1/3603; for implantable neurostimulators A61N1/36128; for heart stimulators A61N1/37; for defibrillators A61N1/3925
• CPC Class Codes: A61N 1/37282 characterised by communication with experts in remote locations using a network

Abstract

An implantable medical device (IMD) provides an alert to a patient that has the IMD implanted in their body. The alert is used to remind the patient to schedule and/or proceed to a follow-up physician visit. The reminder is also used to remind the patient to initiate a remote communication so that stored data or other information may be transmitted to a remote computer network or other communication node.

Claims

1. An implantable medical device (IMD), comprising:

a timer circuit operable to supply a time signal;

a memory circuit operable to store data representative of an IMD check time; and

a controller circuit in operable communication with the timer circuit and the memory circuit and operable to supply an alert signal at a time relative to the IMD check time stored in the memory circuit.

2. The device of claim 1, further comprising:

an audio frequency signal source coupled to receive the alert signal and operable, in response thereto, to supply an audible frequency signal; and

a sound emitter coupled to receive the audible frequency signal and operable, in response thereto, to emit an audible sound.

3. The device of claim 2 wherein the audio frequency signal source comprises one or more memory registers each having an audio frequency signal stored therein.

4. The device of claim 2, wherein the signal supplied by the audio frequency signal source is a voice message.

5. The device of claim 2, wherein the signal supplied by the audio frequency signal source is a non-speech related sound.

6. The device of claim 1, further comprising:

a radio frequency (RF) signal source coupled to receive the alert signal and operable, in response thereto, to supply an RF signal; and

an RF emitter coupled to receive the RF signal and operable, in response thereto, to emit the RF signal.

7. The device of claim 6, wherein the RF emitter is an antenna.

8. The device of claim 1, further comprising:

a physiologic activity sensor in operable communication with the controller circuit and operable to supply a signal representative of physiologic activity,

wherein the controller circuit is further operable to supply the alert signal at a time relative to the check time stored in the memory circuit and when the physiologic activity signal indicates physiologic activity is at or below a predetermined threshold.

9. The device of claim 8, wherein the controller circuit is further operable to supply the alert signal at the time relative to the check time and a first time period after the physiologic activity signal indicates physiologic activity is at or below the predetermined threshold.

10. The device of claim 9, wherein the controller circuit is further operable to cease supplying the alert signal a second time period after the first time period.

11. The device of claim 8, wherein the physiologic activity sensor comprises one or more accelerometers that senses physiological activity and relative position.

12. The device of claim 8, wherein the physiologic activity sensor comprises one or more transthoracic impedance sensors.

13. The device of claim 1, wherein the controller circuit is further operable to (i) receive data representative of a new check time and (ii) replace the check time stored in the memory circuit with the new check time.

14. The device of claim 1, wherein the controller is further operable to repeatedly supply the alert signal for a duration time period at a repetition frequency.

15. The device of claim 14, wherein the controller is further operable to vary at least one of the duration time period and the repetition frequency.

16. The device of claim 15, wherein the controller is:

configured to supply one or more of a plurality of types of alert signals; and

further operable to vary the type of alert signal supplied.

17. The device of claim 1, further comprising:

one or more electrodes coupled to the controller circuit and adapted to electrically couple to one or more muscles in a body,

wherein the alert signal is an electrical stimulus deliverable to the one or more muscles via the one or more electrodes.

18. The device of claim 1, further comprising:

a vibrator coupled to receive the alert signal from the controller circuit and operable, in response thereto, to vibrate at least a portion of the IMD.

19. A system for supplying a reminder to a patient having an implantable medical device (IMD), comprising:

an IMD including;

a timer circuit operable to supply a time signal,

a memory circuit operable to store data representative of a check time,

a controller circuit in operable communication with the timer circuit and the memory circuit and operable to supply an alert signal at a time relative to the IMD check time stored in the memory circuit,

a radio frequency (RF) signal source coupled to receive the alert signal and operable, in response thereto, to supply an RF signal, and

an RF emitter coupled to receive the RF signal and operable, in response thereto, to emit the RF signal; and

an RF receiver configured to receive the emitted RF signal and operable, in response thereto, to issue a patient reminder signal.

20. The system of claim 19, wherein the patient reminder signal issued by the RF receiver is an audible sound.

21. The system of claim 20, wherein the audible sound issued by the RF receiver is a voice message.

22. The system of claim 20, wherein the audible sound issued by the RF receiver is a non-speech related sound.

23. The system of claim 22, wherein the IMD further includes:

a radio frequency (RF) signal source coupled to receive the alert signal and operable, in response thereto, to supply an RF signal; and

an RF emitter coupled to receive the RF signal and operable, in response thereto, to emit the RF signal.

24. The system of claim 23, wherein the RF emitter is an antenna.

25. The system of claim 19, further comprising:

a physiologic activity sensor in operable communication with the controller circuit and operable to supply a signal representative of physiologic activity,

wherein the controller circuit is further operable to supply the alert signal at a time relative to the check time stored in the memory circuit and when the physiologic activity signal indicates physiologic activity is at or below a predetermined threshold.

26. The system of claim 25, wherein the controller circuit is further operable to supply the alert signal at the time relative to the check time and a first time period after the physiologic activity signal indicates physiologic activity is at or below the predetermined threshold.

27. The system of claim 26, wherein the controller circuit is further operable to cease supplying the alert signal a second time period after the first time period.

28. The system of claim 25, wherein the physiologic activity sensor comprises one or more accelerometers that senses physiological activity and relative position.

29. The device of claim 25, wherein the physiologic activity sensor comprises one or more transthoracic impedance sensors.

30. The device of claim 19, wherein the controller circuit is further operable to (i) receive data representative of a new check time and (ii) replace the check time stored in the memory circuit with the new check time.

31. The device of claim 19, wherein the controller circuit is further operable to repeatedly supply the alert signal for a duration time period at a repetition frequency.

32. The device of claim 31, wherein the controller circuit is further operable to vary at least one of the duration time period and the repetition frequency.

33. The device of claim 31, wherein the controller circuit is:

configured to supply one or more of a plurality of types of alert signals; and

further operable to vary the type of alert signal supplied.

34. The device of claim 19, wherein the patient reminder signal issued by the RF receiver is a vibration thereof.

35. An implantable medical device (IMD), comprising:

a memory circuit having a plurality of memory registers adapted to receive and store IMD-related data therein; and

a controller circuit in operable communication with the memory circuit and operable to (i) determine content of one or more of the memory registers and (ii) supply one or more alert signals based at least in part on the determined content of one or more of the memory registers.

36. The device of claim 35, wherein one or more of the memory registers receives and stores data representative of an IMD check time, and wherein the device further comprises:

a timer circuit in operable communication with the controller circuit and operable to supply a time signal,

wherein the controller circuit supplies the alert signal at a time relative to the IMD check time stored in the memory circuit.

37. The device of claim 35, wherein the controller circuit supplies the alert signal when it determines that the content of a predetermined number of the memory registers is stored data that have not been transmitted to a device external to the IMD.

38. The device of claim 37, wherein the controller circuit is further operable to transmit the contents of one or more of the memory registers.

39. A method of reminding a patient having an implantable medical device (IMD) implanted in their body to take an action, the method comprising:

determining content of one or more memory registers; and

supplying one or more alert signals to the patient from the IMD based at least in part on the determined content of one or more of the memory registers.

40. The method of claim 39, wherein the content of one or more of the memory registers is a check time, and the method further comprises:

determining a time relative to the check time; and

supplying the one or more alert signals to the patient from the IMD when the determined time is at least a predetermined time.

41. The method of claim 39, further comprising:

determining whether the content of the memory registers is stored data that have not been read by one or more devices external to the IMD; and

supplying the one or more alert signals to the patient from the IMD when the content of a predetermined number of the memory registers is stored data that have not been transmitted to one or more devices external to the IMD.

42. The method of claim 41, further comprising:

automatically transmitting the contents of one or more data registers.