RF TRANSCEIVER HOPPING FOR COMMUNICATION WITH IMPLANTABLE MEDICAL DEVICE

• US 20130079836A1
• Filed: 09/27/2011
• Published: 03/28/2013
• Est. Priority Date: 09/27/2011
• Status: Active Grant

• Current Assignee: Pacesetter Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: Pacesetter Incorporated (Abbott Laboratories Incorporated)
• Inventors: Knight, Curtis A., Schwartz, Allan R., Srivastava, Nishant
• Granted Patent: US 9,108,065 B2
• Time in Patent Office: Days
• US Class Current: 607/4
• CPC Class Codes: A61N 1/37211 Means for communicating with stimulators
• CPC Class Codes: A61N 1/37235 Aspects of the external programmer
• CPC Class Codes: A61N 1/37252 Details of algorithms or data aspects of communication system, e.g. handshaking, transmitting specific data or segmenting data

Abstract

Dynamically switching between different external RF transceivers for communication with an implantable medical device maintains high communication quality in the face of interference, fading, detuning, or other adverse wireless communication conditions. Quality information associated with communications between an implantable medical device and different external devices is monitored to select one,of these external devices to conduct subsequent communication with the implantable medical device. This monitoring is conducted on a repeated basis such that communication is switched to a different RF transceiver whenever such an RF transceiver is able to achieve a higher quality communication than the currently selected RF transceiver. In some embodiments, RF transceivers are deployed in different devices. For example, one or more RF transceivers may be deployed at a portable programmer (e.g., in the form of a computer tablet) and one or more other RF transceivers may be deployed at an associated base station.

Claims

1. A communication device for communicating with an implantable medical device, comprising:

a radiofrequency transceiver circuit configured to receive radiofrequency signals from an implantable medical device; and

a processing circuit configured to;

determine a first quality indication corresponding to reception of the radiofrequency signals by the radiofrequency transceiver circuit;

determine at least one other quality indication corresponding to reception of radiofrequency signals from the implantable medical device by at least one other radiofrequency transceiver circuit;

compare the first quality indication and the at least one other quality indication; and

select a first one of the radiofrequency transceiver circuits for radiofrequency communication with the implantable medical device, wherein the selection is based on the comparison.

2. The communication device of claim 1, wherein the processing circuit is further configured to:

determine additional quality indications that correspond to reception of other radiofrequency signals from the implantable medical device by the radiofrequency transceiver circuits;

compare the additional quality indications;

determine that a second one of the radiofrequency transceiver circuits is associated with a higher quality indication than the first one of the radiofrequency transceiver circuits based on the comparison of the additional quality indications; and

select the second one of the radiofrequency transceiver circuits in place of the first one of the radiofrequency transceiver circuits for subsequent radiofrequency communication with the implantable medical device as a result of the determination that the second one of the radiofrequency transceiver circuits is associated with a higher quality indication.

3. The communication device of claim 1, wherein the processing circuit is further configured to:

determine at least one communication parameter used by the first one of the radiofrequency transceiver circuits for the radiofrequency communication with the implantable medical device; and

send the at least one communication parameter to each of the radiofrequency transceiver circuits that was not selected, wherein the at least one communication parameter is sent to enable each of the non-selected radiofrequency transceiver circuits to monitor radiofrequency communication between the first one of the radiofrequency transceiver circuits and the implantable medical device.

4. The communication device of claim 1, wherein:

as a result of selecting the first one of the radiofrequency transceiver circuits, the processing circuit is further configured to send a control signal to each of the non-selected radiofrequency transceiver circuits; and

each control signal sets a corresponding one of the non-selected radiofrequency transceiver circuits to a low power mode.

5. The communication device of claim 1, wherein the processing circuit is further configured to:

identify, for each of the radiofrequency transceiver circuits, an antenna to be used for radiofrequency communication;

configure each of the radiofrequency transceiver circuits to use a corresponding identified antenna; and

determine the quality indications based on signals received by the radiofrequency transceiver circuits via the identified antennas.

6. The communication device of claim 1, wherein the radiofrequency communication with the implantable medical device is conducted via a medical implant communication service (MICS) band or an industrial, scientific, and medical (ISM) band.

7. The communication device of claim 1, wherein the radiofrequency communication with the implantable medical device employs a coverage range on the order of 10 meters or less.

8. The communication device of claim 1, wherein the radiofrequency communication with the implantable medical device employs a transmit power on the order of 25 microwatts or less.

9. The communication device of claim 1, wherein the quality indications comprise at least of the group consisting of:

received signal strength information corresponding to the radiofrequency signals received by a corresponding one of the radiofrequency transceiver circuits, cyclic redundancy check (CRC) information corresponding to information embedded in the radiofrequency signals received by a corresponding one of the radiofrequency transceiver circuits, error correcting code (ECC) information corresponding to information embedded in the radiofrequency signals received by a corresponding one of the radiofrequency transceiver circuits, and throughput information corresponding to information embedded in the radiofrequency signals received by a corresponding one of the radiofrequency transceiver circuits.

10. The communication device of claim 1, wherein:

the at least one other radiofrequency transceiver circuit comprises a second radiofrequency transceiver circuit that is embodied in another device that is separate from the communication device; and

the communication device comprises a third radiofrequency transceiver circuit configured to communicate with the other device via radiofrequency signaling.

11. The communication device of claim 10, wherein the processing circuit is further configured to:

determine that the communication device is in communication with the other device; and

communicate with the implantable medical device via the second radiofrequency transceiver circuit and the third radiofrequency transceiver circuit upon selecting the third radiofrequency circuit for the radiofrequency communication with the implantable medical device.

12. The communication device of claim 10, wherein:

the radiofrequency communication with the implantable medical device is conducted via a medical radiofrequency band; and

the radiofrequency signaling is conducted via an IEEE 802.11 radiofrequency band.

13. The communication device of claim 1, wherein the at least one other radiofrequency transceiver circuit is embodied in the communication device.

14. The communication device of claim 1, wherein:

the at least one other radiofrequency transceiver circuit is embodied in another device that is separate from the communication device;

the other device comprises a cable that is coupled to a first connector such that the first connector is electrically coupled with the at least one other radiofrequency transceiver circuit; and

the communication device further comprises a second connector configured to connect to the first connector such that the at least one other radiofrequency transceiver circuit is electrically coupled with the processing circuit.

15. The communication device of claim 1, wherein the communication device is a tablet computing system.

16. The communication device of claim 1, wherein the communication device is a programmer for an implantable cardiac device.

17. A system for communicating with an implantable medical device, comprising:

a first communication device, comprising

a first radiofrequency transceiver circuit; and

at least one second radiofrequency transceiver circuit configured to communicate via radiofrequency signaling with an implantable medical device; and

a second communication device, comprising;

a third radiofrequency transceiver circuit configured to communicate with the first radiofrequency transceiver circuit;

at least one fourth radiofrequency transceiver circuit configured to communicate via radiofrequency signaling with the implantable medical device; and

a processing circuit configured to select a radiofrequency transceiver circuit for radiofrequency communication with the implantable medical device from a set of radiofrequency transceiver circuits consisting of the at least one second radiofrequency transceiver circuit and the at least one fourth radiofrequency transceiver circuit, wherein the processing circuit is further configured to communicate with the at least one second radiofrequency transceiver circuit via the third radiofrequency transceiver circuit and the first radiofrequency transceiver circuit.

18. The system of claim 17, wherein the selection of the radiofrequency transceiver circuit comprises:

determining, for each radiofrequency transceiver circuit of the set, an indication of communication quality between the implantable medical device and the corresponding radiofrequency transceiver circuit;

comparing the indications; and

selecting the radiofrequency transceiver circuit for the radiofrequency communication based on the comparison.

19. The system of claim 17, wherein:

the at least one second radiofrequency transceiver circuit is embodied in another device that is separate from the first communication device;

the other device comprises a cable that is coupled to a first connector such that the first connector is electrically coupled with the at least one second radiofrequency transceiver circuit; and

the first communication device further comprises a second connector configured to connect to the first connector to enable the communication between the at least one second radiofrequency transceiver circuit and the processing circuit.

20. The system of claim 17, wherein the first communication device further comprises a communication network interface configured to communicate with the processing circuit via the first radiofrequency transceiver circuit and the third radiofrequency transceiver circuit.

21. The system of claim 17, wherein the first communication device further comprises an electrocardiogram circuit configured to communicate with the processing circuit via the first radiofrequency transceiver circuit and the third radiofrequency transceiver circuit.

22. The system of claim 17, wherein:

the first communication device is a base station; and

the second communication device is a tablet computing system.

23. A method for communicating with an implantable medical device, comprising:

determining a first quality indication corresponding to reception of radiofrequency signals from an implantable medical device by a radiofrequency transceiver circuit;

determining at least one other quality indication corresponding to reception of radiofrequency signals from the implantable medical device by at least one other radiofrequency transceiver circuit;

comparing the first quality indication and the at least one other quality indication; and

selecting a first one of the radiofrequency transceiver circuits for radiofrequency communication with the implantable medical device, wherein the selection is based on the comparison.

24. The method of claim 23, further comprising:

determining additional quality indications that correspond to reception of other radiofrequency signals from the implantable medical device by the radiofrequency transceiver circuits;

comparing the additional quality indications;

determining that a second one of the radiofrequency transceiver circuits is associated with a higher quality indication than the first one of the radiofrequency transceiver circuits based on the comparison of the additional quality indications; and

selecting the second one of the radiofrequency transceiver circuits in place of the first one of the radiofrequency transceiver circuits for subsequent radiofrequency communication with the implantable medical device as a result of the determination that the second one of the radiofrequency transceiver circuits is associated with a higher quality indication.

25. The method of claim 23, further comprising:

determining at least one communication parameter used by the first one of the radiofrequency transceiver circuits for the radiofrequency communication with the implantable medical device; and

sending the at least one communication parameter to each of the radiofrequency transceiver circuits that was not selected, wherein the at least one communication parameter is sent to enable each of the non-selected radiofrequency transceiver circuits to monitor radiofrequency communication between the first one of the radiofrequency transceiver circuits and the implantable medical device.

26. The method of claim 23, further comprising sending a control signal to each of the non-selected radiofrequency transceiver circuits as a result of selecting the first one of the radiofrequency transceiver circuits, wherein each control signal sets a corresponding one of the non-selected radiofrequency transceiver circuits to a low power mode.

27. The method of claim 23, further comprising:

identifying, for each of the radiofrequency transceiver circuits, an antenna to be used for radiofrequency communication;

configuring each of the radiofrequency transceiver circuits to use a corresponding identified antenna; and

determining the quality indications based on signals received by the radiofrequency transceiver circuits via the identified antennas.