US 2025/0170404 A1 · CALIBRATION FOR ECAP SENSING

Abstract

Systems, devices, and techniques are described for calibrating a medical device that senses ECAP signals from a patient's nerve tissue. For example a method includes: instructing, with processing circuitry, stimulation circuitry of a medical device to deliver, on stimulation electrodes of the medical device, an electrical stimulation signal having an amplitude substantially equal to zero to a patient; entering, with the processing circuitry subsequent to instructing the stimulation circuitry to deliver the electrical stimulation signal, a passive recharge state on stimulation electrode circuitry; and auto-zeroing, with the processing circuitry, inputs to an operational amplifier of sensing circuitry electrically coupled to sensing electrodes of the medical device while the stimulation electrode circuitry is in the passive recharge state.

Claims20

Dependent claims

A method comprising:

instructing, with processing circuity, stimulation circuitry of a medical device to deliver, on a first set of stimulation electrodes of the medical device, a first electrical stimulation signal comprising informed pulses;
instructing, with the processing circuitry, the stimulation circuitry to couple to a second set of stimulation electrodes of the medical device for delivering a second electrical stimulation signal comprising control pulses;
auto-zeroing, with the processing circuitry, inputs to an operational amplifier of sensing circuitry electrically coupled to sensing electrodes of the medical device while the stimulation circuitry is coupled to the second set of stimulation electrodes;
instructing, with the processing circuitry, the stimulation circuitry to deliver the second electrical stimulation signal comprising the control pulses;
and
sensing, with the sensing circuitry, an evoked signal generated in response to the second electrical stimulation signal.

3 more elements

A system comprising a medical device, wherein the medical device comprises:

sensing circuitry comprising an operational amplifier electrically couplable to sensing electrodes;
stimulation circuitry electrically couplable to a first set of stimulation electrodes and a second set of stimulation electrodes;
and
processing circuitry configured to:
instruct the stimulation circuitry to deliver, on the first set of stimulation electrodes, a first electrical stimulation signal comprising informed pulses;
instruct the stimulation circuitry to couple to the second set of stimulation electrodes for delivering a second electrical stimulation signal comprising control pulses;
auto-zero inputs to the operational amplifier of sensing circuitry electrically coupled to the sensing electrodes while the stimulation circuitry is coupled to the second set of stimulation electrodes;
and
instruct the stimulation circuitry to deliver the second electrical stimulation signal comprising the control pulses,
wherein the sensing circuitry is configured to sense an evoked signal generated in response to the second electrical stimulation signal.

7 more elements

Dependencies are inferred from the claim text.

Calibration for ecap sensing

Life of this patent

Calibration for ecap sensing

Life of this patent

Abstract

Claims20