Energy adaptive communication for medical devices

• US 9,446,253 B2
• Filed: 08/26/2015
• Issued: 09/20/2016
• Est. Priority Date: 08/28/2014
• Status: Active Grant

• Current Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Original Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Inventors: Stahmann, Jeffrey E., Huelskamp, Paul, Kane, Michael J., Maile, Keith R.
• Primary Examiner(s): Wieland, Robert N
• Application Number:
  US14/836,247
• Publication Number:
  US 20160059022A1
• Time in Patent Office: 391 Days
• US Class Current: 1/1
• CPC Class Codes: A61N 1/371 Capture, i.e. successful stimulation
• CPC Class Codes: A61N 1/37217 characterised by the communication link, e.g. acoustic or tactile
• CPC Class Codes: A61N 1/37241 providing test stimulations
• CPC Class Codes: A61N 1/37276 characterised by means for reducing power consumption during telemetry
• CPC Class Codes: A61N 1/37288 Communication to several implantable medical devices within one patient
• CPC Class Codes: A61N 1/3756 Casings with electrodes thereon, e.g. leadless stimulators
• CPC Class Codes: A61N 1/3956 Implantable devices for applying electric shocks to the heart, e.g. for cardioversion

Abstract

System and methods for energy adaptive communications between medical devices are disclosed. In one example, a medical device includes a communication module configured to deliver a plurality of pulses to tissue of a patient, where each pulse has an amount of energy. A control module operatively coupled to the communication module, may be configured to, for each delivered pulse, determine whether the delivered pulse produces an unwanted stimulation of the patient and to change the amount of energy of the plurality of pulses over time so as to identify an amount of energy that corresponds to an unwanted stimulation threshold for the pulses. The control module may then set a maximum energy value for communication pulses that is below the unwanted stimulation threshold, and may deliver communication pulses below the maximum energy value during communication with another medical device.

Claims

1. A medical device comprising:

a communication module configured to deliver a plurality of pulses to tissue of a patient, where each pulse comprises an amount of energy;

a control module operatively coupled to the communication module, the control module configured to;

for each delivered pulse, determine whether the delivered pulse produces an unwanted stimulation of the patient;

change the amount of energy of the plurality of pulses over time so as to identify an amount of energy that corresponds to an unwanted stimulation threshold for the pulses;

set a maximum energy value for communication pulses that is below the unwanted stimulation threshold; and

deliver communication pulses below the maximum energy value during communication with another device.

2. The medical device of claim 1, wherein the maximum energy value is set a predetermined safety margin below the unwanted stimulation threshold.

3. A method for adjusting a communication protocol between a plurality of medical devices, the method comprising:

with a first medical device, delivering one or more first pulses where each first pulse includes a first amount of energy;

determining a number of the one or more first pulses received by a second medical device;

with the first medical device, delivering one or more second pulses where each second pulse includes a second amount of energy;

determining a number of the one or more second pulses received by the second medical device; and

adjusting a minimum communication pulse energy for the first medical device when communicating with the second medical device based on the number of the one or more first pulses received by the second medical device and the number of the one or more second pulses received by the second medical device.

4. The method of claim 3, wherein the amount of energy of each pulse is defined at least in part by an amplitude and a pulse width.

5. The method of claim 4, wherein adjusting the minimum communication pulse energy for the first medical device when communicating with the second medical device comprises adjusting the pulse width of each communication pulse used to communicate with the second medical device.

6. The method of claim 4, wherein adjusting the minimum communication pulse energy for the first medical device when communicating with the second medical device comprises adjusting the amplitude of each communication pulse used to communicate with the second medical device.

7. The method of claim 4, wherein adjusting the minimum communication pulse energy for the first medical device when communicating with the second medical device comprises adjusting the pulse width and the amplitude of each communication pulse used to communicate with the second medical device.

8. The method of claim 3, wherein adjusting the minimum communication pulse energy for the first medical device when communicating with the second medical device based on the number of the one or more first pulses received by the second medical device and the number of the one or more second pulses received by the second medical device comprises setting the minimum communication pulse energy for the first medical device when communicating with the second medical device to the amount of energy of the one or more first and second pulses with the lowest acceptable number of pulses received by the second medical device.

9. The method of claim 8, further comprising adding a predetermined safety margin to the minimum communication pulse energy.

10. The method of claim 3, further comprising determining whether the adjusted minimum communication pulse energy overlaps a maximum energy threshold.

11. The method of claim 10, further comprising, after determining the adjusted minimum communication pulse energy overlaps the maximum energy threshold, by the first medical device, entering a safe communication mode.