Baroreflex activation therapy with conditional shut off
An embodiment of a baroreflex stimulator comprises a pulse generator to provide a baroreflex stimulation signal through an electrode, and a modulator to modulate the baroreflex stimulation signal based on a circadian rhythm template.
1. A baroreflex activation therapy (BAT) system, comprising:
therapy circuitry connected to a first therapy terminal and a second therapy terminal and configured for producing a baroreflex activation therapy to provide a therapy to a patient through baroreflex modulation;
measurement circuitry that is capable of measuring a voltage between a first measurement terminal and a second measurement terminal; and
switching circuitry connected to the first measurement terminal, the second measurement terminal, the first therapy terminal, and the second therapy terminal;
the switching circuitry being configured to couple a first electrode and a second electrode to the first therapy terminal and the second therapy terminal, respectively, for providing the baroreflex activation therapy to the body of a patient.
2. The system of claim 1 , wherein the switching circuitry is configured to couple the first electrode and a conductive housing of the BAT system to the first measurement terminal and the second measurement terminal, respectively, for measuring an electric potential difference within the body of the patient.
3. The system of claim 2 , wherein the conductive housing comprises a hermetically sealed housing defining an interior.
4. The system of claim 3 , wherein the therapy circuitry, the measurement circuitry, and the switching circuitry are all disposed in the interior of the housing.
5. The system of claim 1 , wherein the switching circuitry is configured to couple the first electrode and a third electrode to the first measurement terminal and the second measurement terminal, respectively, for measuring an electric potential difference within the body of the patient.
6. The system of claim 1 , further comprising:
a memory storing a threshold value and
disable circuitry configured to disconnect the therapy circuitry from at least one of the first and second electrodes if a measured value is below the threshold value.
7. The system of claim 6 , further comprising a pressure sensor.
8. The system of claim 1 , further comprising a controller operably connected to the therapy circuitry, the measurement circuitry and the switching circuitry, wherein the measurement circuitry includes a sensor connected to the controller.
9. The system of claim 8 , wherein the measurement circuitry is capable of measuring a biopotential within the body of the patient for producing an electrocardiogram signal; and
the controller is configured for directing the switching circuitry to periodically connect one or more electrodes to the therapy circuitry for providing baroreflex activation therapy (BAT) to the body of the patient, and the controller is configured for directing the switching circuitry to periodically connect at least one of the first and second electrodes to the measurement circuitry for measuring the biopotential within the body of the patient for producing the electrocardiogram signal.
10. The system of claim 8 , wherein the sensor comprises a pressure sensor.