US 11,672,978 B2
Sacral nerve stimulation
Xin Su, Plymouth, MN (US); and David A. Dinsmoor, North Oaks, MN (US)
Assigned to Medtronic, Inc., Minneapolis, MN (US)
Filed by Medtronic, Inc., Minneapolis, MN (US)
Filed on Aug. 6, 2021, as Appl. No. 17/396,430.
Application 17/396,430 is a continuation of application No. 15/965,344, filed on Apr. 27, 2018, abandoned.
Claims priority of provisional application 62/553,018, filed on Aug. 31, 2017.
Claims priority of provisional application 62/583,254, filed on Nov. 8, 2017.
Claims priority of provisional application 62/583,814, filed on Nov. 9, 2017.
Prior Publication US 2021/0361942 A1, Nov. 25, 2021
Int. Cl. A61N 1/36 (2006.01); A61N 1/05 (2006.01); A61B 5/20 (2006.01)
CPC A61N 1/36007 (2013.01) [A61N 1/36139 (2013.01); A61N 1/36175 (2013.01); A61B 5/202 (2013.01); A61N 1/0514 (2013.01); A61N 1/0553 (2013.01); A61N 1/3606 (2013.01); A61N 1/36031 (2017.08); A61N 1/36171 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method comprising:
determining, using processing circuitry, a chronaxie of evoked threshold responses from electrical stimulation delivered to a nerve of a patient by at least:
delivering, via a medical device, the electrical stimulation at a plurality of different pulse widths to the nerve;
determining a threshold amplitude of the electrical stimulation that evokes a response at each respective pulse width of the plurality of pulse widths; and
determining, using the processing circuitry, the chronaxie based on the respective threshold amplitudes and corresponding respective pulse widths of the plurality of pulse widths,
wherein determining the chronaxie based on the respective threshold amplitudes and corresponding respective pulse widths of the plurality of pulse widths comprises determining the chronaxie based on a fit to Y=(Y0−NS)*exp(−K*X)+NS, where Y is an evoked response, X is a pulse width, Y0 is an initial value, NS is a rheobase, and K is an inverse of the chronaxie;
receiving, using the processing circuitry, sensor data from a sensor; and
initiating, based on the received sensor data, delivery of electrical stimulation having a pulse width at or near the determined chronaxie from the medical device to the nerve of a patient to treat a patient condition.