Determining estimated neural threshold with ECAP signals

A method comprises:

• controlling, by processing circuitry, delivery of a plurality of stimulation pulses to a patient, wherein each stimulation pulse of the plurality of stimulation pulses is at least partially defined by a different respective value of a stimulation parameter;
• receiving, by the processing circuitry, evoked compound action potential (ECAP) signal information, wherein the ECAP signal information comprises ECAP signals sensed by sensing circuitry and elicited by the plurality of stimulation pulses;
• determining, by the processing circuitry and based on the ECAP signal information, ECAP characteristic values for each of the ECAP signals elicited by the plurality of stimulation pulses;
• determining, by the processing circuitry, a relationship between the ECAP characteristic values and the different respective values of the stimulation parameter;
• and
• determining, by the processing circuitry and based on the relationship between the ECAP characteristic values and the different respective values of the stimulation parameter, an estimated neural threshold of the patient for stimulation.

A computer-readable storage medium comprising instructions that, when executed by processing circuitry, causes the processing circuitry to:

• control delivery of a plurality of stimulation pulses to a patient, wherein each stimulation pulse of the plurality of stimulation pulses is at least partially defined by a different respective value of a stimulation parameter;
• receive evoked compound action potential (ECAP) signal information, wherein the ECAP signal information comprises ECAP signals sensed by sensing circuitry and elicited by the plurality of stimulation pulses;
• determine, based on the ECAP signal information, ECAP characteristic values for each of the ECAP signals elicited by the plurality of stimulation pulses;
• determine a relationship between the ECAP characteristic values and the different respective values of the stimulation parameter;
• and
• determine, based on the relationship between the ECAP characteristic values and the different respective values of the stimulation parameter, an estimated neural threshold of the patient for stimulation.