Programmer for biostimulator system
A biostimulator system comprises one or more implantable devices and an external programmer configured for communicating with the implantable device or devices via bidirectional communication pathways comprising a receiving pathway that decodes information encoded on stimulation pulses generated by ones of the implantable device or devices and conducted through body tissue to the external programmer.
1. A biostimulator system for a patient comprising:
at least one implantable device configured to generate modulated signals and to encode information on the modulated signals; and
an external programmer comprising at least two electrodes and bidirectional communication pathways configured to couple with the electrodes, the external programmer being configured to be located outside the patient and communicate with the at least one implantable device through the at least two electrodes of the external programmer via the bidirectional communication pathways, the bidirectional communication pathways comprising a receiving pathway configured to decode information encoded on modulated signals generated by the at least one implantable device and conducted through body tissue to the at least two electrodes of the external programmer.
2. The system of claim 1 wherein the bidirectional communication pathways further comprise a transmitting pathway configured to pass information from the at least two electrodes of the external programmer to the at least one implantable device by direct conduction through the body tissue.
3. The system of claim 2 wherein the modulated signals are transmitted at a frequency configured to avoid skeletal muscle stimulation.
4. The system of claim 1 wherein the bidirectional communication pathways further comprise a transmitting pathway configured to pass information from the at least two electrodes of the external programmer to the at least one implantable device in a common communication event, whereby information is sent to at least one target device of the at least one implantable device.
5. The system of claim 4 wherein the transmitting pathway is further configured to pass information specific to a single implantable device or a subset of implantable devices having a unique address assigned to the single implantable device or the subset of implantable devices.
6. The system of claim 4 wherein the transmitting pathway is further configured to pass information designating a specific function that is to be executed by a particular implantable device or a particular subset of implantable devices without passing individual address information for activating execution by the particular implantable device or the particular subset of implantable devices alone.
7. The system of claim 4 wherein the transmitting pathway is configured to pass information designating a specific function that is to be executed by the at least one implantable device, the at least one implantable device comprising programming specific to the function and being further adapted to recognize that the received information is relevant to the function.
8. The system of claim 1 further wherein the receiving pathway further comprises a low-pass filter adapted to separate an electrocardiogram from the information signals encoded on the modulated signals.
9. The system of claim 8 further comprising a controller configured to blank noise and unwanted signals from the electrocardiogram.
10. The system of claim 1 wherein the at least one implantable device comprises at least one leadless cardiac pacemaker.
11. The system of claim 10 wherein the at least one leadless cardiac pacemaker is configured to be implanted adjacent to an inside or an outside wall of a cardiac chamber.
12. The system of claim 10 wherein the at least one leadless cardiac pacemaker is configured to deliver an information-encoded pulse during a refractory period following a natural cardiac depolarization.
13. The system of claim 10 wherein the at least one leadless cardiac pacemaker is configured to charge a tank capacitor in preparation for stimulation pulse generation, time one or more windows between pulse generation, disable charging of the tank capacitor during the one or more timed windows, and enable a receive amplifier while the tank capacitor is disabled.
14. The system according to claim 13 wherein the external programmer is further configured to detect a stimulation pulse from the at least one leadless cardiac pacemaker and transmit data after a selected delay to coincide with a window within which the receive amplifier of the at least one leadless cardiac pacemaker is enabled.