Systems and methods for detecting evoked compound action potential (ECAP) and/or stimulation artifact features in response to neurostimulation

A method of evaluating the efficacy of spinal cord stimulation (SCS) therapy applied to a patient using an implantable pulse generator (IPG), the method comprising:

• generating one or more electrical pulses by the IPG;
• applying the generated one or more electrical pulses from the IPG to stimulate neural tissue of a patient using a first implanted lead electrode pair;
• sensing an electrical response to the one or more applied stimulation electrical pulses using one or more implanted lead electrodes to generate response data;
• processing the response data by applying a transformation to the response data to measure a first evoked compound action potential (ECAP) signal;
• and
• repeating steps a) to d) to determine a second ECAP signal,
• wherein an increase in the second ECAP signal compared to the first ECAP signal corresponds to hyperpolarization of dorsal column axons, and
• wherein hyperpolarization of dorsal column axons corresponds to efficacious SCS therapy.

A method of providing spinal cord stimulation (SCS) to a patient using an implantable pulse generator (IPG), the method comprising:

• applying electrical stimulation pulses generated by the IPG to tissue of a patient using a plurality of implanted stimulation leads, wherein each stimulation lead of the plurality of implanted stimulation leads includes one or more electrode contacts;
• recording evoked compound action potentials (ECAPs) detected by at least one electrode contact of the one or more electrode contacts of each implanted stimulation lead, wherein the plurality of implanted stimulation leads are proximate at least one body structure of the patient;
• generating profiles based on the recorded ECAPs;
• and
• detecting changes in a position of one or more implanted stimulation leads relative to the at least one body structure of the patient based on the profiles.