Adapative telemetry system and method for an implantable medical device

• US 20030009204A1
• Filed: 07/06/2001
• Published: 01/09/2003
• Est. Priority Date: 07/06/2001
• Status: Abandoned Application

• Current Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Original Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Inventors: Linder, William J., Mazar, Scott T., Amundson, Mark D., Lent, Karen M.
• Application Number:
  US09/900,717
• Publication Number:
  US 20030009204A1
• Time in Patent Office: Days
• US Class Current: 607/60
• CPC Class Codes: A61N 1/37252 Details of algorithms or data aspects of communication system, e.g. handshaking, transmitting specific data or segmenting data
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

A system and method for transmitting telemetry data from an implantable medical device to an external device. A connection-oriented protocol is used to transmit data at a higher data rate while a burst mode protocol is used to transmit data a lower data rate. The lower data rate may be used for remote communications where the received signal is of lower power.

Claims

1. A method for transmitting telemetry data from an implantable medical device, comprising:

transmitting data from the implantable device to an external device at either a higher or lower data rate;

wherein data is transmitted at the lower rate using a burst mode telemetry protocol; and

,

wherein data is transmitted at the higher rate using a connection-oriented telemetry protocol.

2. The method of claim 1 wherein the connection-oriented telemetry protocol dictates that transmitted data packets are acknowledged by the external device and retransmitted the transmitted data packets are unacknowledged.

3. The method of claim 1 wherein the burst mode telemetry protocol dictates that transmitted data packets are sent autonomously with no provision for data acknowledgement.

4. The method of claim 1 wherein data is transmitted at the lower rate with a lower symbol rate and narrower bandwidth than at the high rate.

5. The method of claim 3 wherein data is transmitted to the external device by modulating a radio-frequency carrier signal.

6. The method of claim 4 further comprising receiving the modulated carrier signal at the external device and bandpass filtering the signal with a wider or narrower passband depending upon whether the signal contains data transmitted at the higher or lower rate, respectively.

7. The method of claim 1 further comprising transmitting data at the lower rate upon a request for data transmission at that rate from the external device.

8. The method of claim 1 wherein the connection-oriented protocol is a master/slave protocol in which communications are initiated by a data request from the external device to the implantable medical device.

9. A telemetry system for an implantable medical device, comprising;

circuitry at the implantable device and at one or more external devices for transmitting and receiving data in the form of a modulated carrier signal;

wherein the implantable device is configured to transmit data the external device at either a higher or lower data rate;

wherein data is transmitted at the lower rate using a burst mode telemetry protocol; and

,

wherein data is transmitted at the higher rate using a connection-oriented telemetry protocol.

10. The system of claim 9 wherein data is transmitted at the lower rate with a lower symbol rate and narrower bandwidth than at the high rate.

11. The system of claim 10 wherein data is transmitted to the external device by modulating a radio-frequency carrier signal.

12. The system of claim 9 further comprising an external device with a bandpass filter having a passband for receiving signals containing data transmitted at the higher data rate and an external device with a bandpass filter having a passband for receiving signals containing data transmitted at the lower data rate.

13. The system of claim 9 wherein the implantable device is configured to transmit data at the lower rate upon a request for data transmission at that rate from the external device.

14. The system of claim 9 wherein the connection-oriented telemetry protocol dictates that transmitted data packets are acknowledged by the external device and retransmitted the transmitted data packets are unacknowledged.

15. The system of claim 9 wherein the burst mode telemetry protocol dictates that transmitted data packets are sent autonomously with no provision for data acknowledgement.

16. The system of claim 9 wherein the connection-oriented protocol is a master/slave protocol in which communications are initiated by a data request from the external device to the implantable medical device.

17. The system of claim 9 wherein the implantable device further comprises a pair of bandpass filters with narrower and wider passbands for receiving signals transmitted at the lower and higher data rates, respectively.