Telemetry modulation protocol system for medical devices

• US 6,443,891 B1
• Filed: 09/20/2000
• Issued: 09/03/2002
• Est. Priority Date: 09/20/2000
• Status: Expired due to Term

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Grevious, John J.
• Primary Examiner(s): Shaver, Kevin
• Assistant Examiner(s): Natnithithadha, Navin
• Application Number:
  US09/665,874
• Time in Patent Office: 713 Days
• Field of Search: 600/302, 600/300, 600/301, 128/897, 128/898, 128/903, 607/32, 607/60
• US Class Current: 600/302
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61N 1/3727 characterised by the modulation technique
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

An apparatus and method for a telemetry system that automatically selects a symmetric modulation protocol configuration for telemetry communication between medical devices and programmers used in providing patient treatment. The standardized telemetry protocol will use the symmetric modulation protocol configuration to establish a downlink or uplink connection. The standardized telemetry protocol will automatically select the appropriate modulation protocol configuration depending on the modulation format and data rate capability best suited for the components needing to communicate via telemetry.

Claims

1. A medical device telemetry system comprising in combination:

a medical device having a first telemetry module; and

a programmer having a second telemetry module able to transmit a message envelope to the first telemetry module, the message envelope providing indication of at least one modulation protocol configuration that can be used for telemetry communication with the programmer;

wherein the first telemetry module is capable of automatically selecting at least one compatible modulation protocol configuration for telemetry communication between the first and second telemetry modules based upon the message envelope.

2. A medical device telemetry system comprising in combination:

a medical device having a first telemetry module; and

a programmer having a second telemetry module able to transmit a message envelope to the first telemetry module;

wherein the first telemetry module is capable of automatically selecting at least one compatible modulation protocol configuration for telemetry communication between the first and second telemetry modules based upon the message envelope, and wherein the first telemetry module can contemporaneously select a second modulation protocol configuration based upon the message envelope while communicating with the second telemetry module on a first modulation protocol such that the medical device is capable of switching between multiple modulation protocol configurations.

3. The medical device telemetry system of claim 2 wherein the message envelope comprises a configuration select interval and a start-of-message burst.

4. The medical device telemetry system of claim 3 wherein the compatible modulation protocol configuration is symmetric and comprises a modulation format and a data rate capability.

5. The medical device telemetry system of claim 4 wherein the modulation format is pulse width modulation, pulse width modulation plus pulse interval modulation, modified phase shift keying modulation, pulse position modulation or pulse interval modulation.

6. The medical device telemetry system of claim 5 wherein the data rate capability is low speed, medium speed or high speed.

7. The medical device telemetry system of claim 4 wherein the medical device is selected from the group consisting of an internal neuro stimulator, an external neuro stimulator, a pacemaker, a defibrillator, a cochlear implant, an implantable diagnostic device, and an implantable drug delivery pump.

8. A medical device telemetry system comprising in combination:

a medical device having a first telemetry module; and

a programmer having a second telemetry module able to transmit a message envelope to the first telemetry module, the message envelope providing indication of at least one modulation protocol configuration that can be used for telemetry communication with the programmer;

wherein the first telemetry module is capable of automatically selecting at least one compatible modulation protocol configuration for unidirectional communication from the second telemetry module to the first telemetry module based upon the message envelope.

9. A medical device telemetry system comprising in combination:

a medical device having a first telemetry module; and

a programmer having a second telemetry module able to transmit a message envelope to the first telemetry module;

wherein the first telemetry module is capable of automatically selecting at least one compatible modulation protocol configuration for unidirectional communication from the second telemetry module to the first telemetry module based upon the message envelope, and wherein the modulation protocol configuration can contemporaneously select a second modulation protocol configuration based upon the message envelope while in communication with the second telemetry module on a first compatible modulation protocol such that the medical device is capable of switching between multiple protocal configurations.

10. The medical device telemetry system of claim 9 wherein the message envelope comprises a configuration select interval and a start-of-message burst.

11. The medical device telemetry system of claim 10 wherein the modulation protocol configuration is symmetric and comprises a modulation format and a data rate capability.

12. The medical device telemetry system of claim 11 wherein the modulation format is pulse width modulation, pulse width modulation plus pulse interval modulation, modified phase shift keying modulation, pulse position modulation or pulse interval modulation.

13. The medical device telemetry system of claim 12 wherein the data rate capability is low speed, medium speed or high speed.

14. The medical device telemetry system of claim 13 wherein the medical device is selected from the group consisting of an internal neuro stimulator, an external neuro stimulator, a pacemaker, a defibrillator, a cochlear implant, an implantable diagnostic device, and an implantable drug delivery pump.

15. A method for establishing a communications link for transmission of information between a medical device and a programmer, the method comprising:

transmitting a message envelope to the medical device;

receiving a message envelope at a telemetry module in the medical device;

interpreting the message envelope to automatically select a protocol modulation configuration based upon the message envelope; and

establishing the communications link with a programmer telemetry module using the selected protocol configuration.

16. The method for establishing a communications link of claim 15 wherein the telemetry module can contemporaneously select a modulation protocol configuration based upon the message envelope while communicating with the programmer telemetry module such that the medical device is capable of switching between multiple protocol configurations.

17. The method for establishing a communications link of claim 16 wherein the message envelope comprises a configuration select interval and a start-of-message burst.

18. The method for establishing a communications link of claim 17 wherein the modulation protocol configuration is symmetric and comprised of a modulation format and a data rate capability.

19. The method for establishing a communications link of claim 18 wherein the modulation format is pulse width modulation, pulse width modulation plus pulse interval modulation, modified phase shift keying modulation, pulse position modulation or pulse interval modulation.

20. The method for establishing a communications link of claim 19 wherein the data rate capability is low speed, medium speed or high speed.

21. The method for establishing a communications link of claim 20 wherein the medical device is selected from the group consisting of an internal neuro stimulator, an external neuro stimulator, a pacemaker, a defibrillator, a cochlear implant, an implantable diagnostic device, and an implantable drug delivery pump.

22. A communication modulation protocol configuration for establishing a communications link in a telemetry system between a first telemetry module in a medical device and a second telemetry module in a programmer, the modulation protocol configuration comprising in combination:

at least one modulation format; and

a data rate capability for the medical device;

wherein a first modulation format is automatically selected based upon a message envelope communicated between the first telemetry module and the second telemetry module, wherein the message envelope provides indication of at least one modulation protocol format that can be used for telemetry communication with the programmer.

23. A communication modulation protocol configuration for establishing a communications link in a telemetry system between a first telemetry module in a medical device and a second telemetry module in a programmer, the modulation protocol configuration comprising in combination:

at least one modulation format; and

a data rate capability for the medical device,

wherein a first modulation format is automatically selected based upon a message envelope communicated between the first telemetry module and the second telemetry module, and wherein the automatically selected modulation protocol configuration is symmetric.

24. The communication modulation protocol configuration of claim 23 wherein the first telemetry module can contemporaneously select a second modulation format based upon the message envelope while communicating with the second telemetry module on the first modulation format such that the medical device is capable of switching between multiple modulation formats.

25. The medical device telemetry system of claim 24 wherein the modulation format is pulse width modulation, pulse width modulation plus pulse interval modulation, modified phase shift keying modulation, pulse position modulation or pulse interval modulation.

26. The medical device telemetry system of claim 25 wherein the data rate capability is low speed, medium speed or high speed.

27. The symmetrical modulation protocol configuration of claim 26 wherein the medical device is selected from the group consisting of an internal neuro stimulator, an external neuro stimulator, a pacemaker, a defibrillator, a cochlear implant, an implantable diagnostic device, and an implantable pump.

28. A method for establishing a communications telemetry link between a programmer and a medical device with at least one system layer, the method comprising:

transmitting a message envelope to the medical device, wherein the message envelope is comprised of a header, a message and a trailer;

receiving the message envelope at a physical layer in the medical device;

transmitting the message envelope to a data link layer;

removing the header and trailer from the message envelope at the data link layer;

transmitting the message to a network layer;

transmitting the message to the network layer to an applications layer; and

interpreting the header in the data link layer to automatically select a protocol modulation configuration for the telemetry link to thereby establish the communications link between the medical device and the programmer using the selected protocol modulation configuration.

29. The method for establishing a communications telemetry link of claim 28 wherein the message envelope comprises a configuration select interval and a start-of-message burst for automatically selecting the symmetrical protocol configuration.

30. The method for establishing a communications telemetry link of claim 29 wherein the modulation protocol configuration is comprised of a modulation format and a data rate capability.

31. The method for establishing a communications telemetry link of claim 30 wherein the modulation format is pulse width modulation, pulse width modulation plus pulse interval modulation, modified phase shift keying modulation, pulse position modulation or pulse interval modulation.

32. The method for establishing a communications telemetry link of claim 31 wherein the data rate capability is low speed, medium speed or high speed.

33. The method for establishing a communications telemetry link of claim 28 wherein the medical device is selected from the group consisting of an internal neuro stimulator, an external neuro stimulator, a pacemaker, a defibrillator, a cochlear implant, an implantable diagnostic device, and an implantable drug delivery pump.

34. A system for establishing a telemetric communications link for transmission of information comprising in combination:

a programming device capable of transmitting a message envelope via a programmer telemetry module;

a medical device capable of receiving the message envelope via a medical device telemetry module; and

means for interpreting the message envelope to automatically select a protocol modulation configuration based upon the message envelope,

wherein medical device telemetry module is configured to operate in the selected protocol modulation configuration.

35. The system of claim 34, wherein the means for interpreting is selected from the group consisting of a controller and a processor.

36. The system of claim 34, wherein the medical device telemetry module can contemporaneously select a modulation protocol configuration based upon the message envelope while communicating with the programmer telemetry module such that the medical device is capable of switching between multiple protocol configurations.

37. The system of claim 34, wherein the message envelope comprises a configuration select interval and a start-of-message burst.

38. The system of claim 34, wherein the modulation protocol configuration is symmetric and comprised of a modulation format and a data rate capability.

39. The system of claim 38, wherein the modulation format is pulse width modulation, pulse width modulation plus pulse interval modulation, modified phase shift keying modulation, pulse position modulation or pulse interval modulation.

40. The system of claim 38, wherein wherein the data rate capability is low speed, medium speed or high speed.