Patent Document ID: 9730634
Application ID: 14864919
Patent Status: 1

Claim One:
1. An apparatus to map locations of nerves, the apparatus comprising circuitry configured to: stimulate a nerve with an electrical stimulation current from at least one stimulation electrode at a first area of a patient and a second area of the patient; detect a respective muscle reaction resulting from stimulation of the nerve by the at least one stimulation electrode at both the first area of the patient and the second area of the patient; determine, for the first area and the second area, a first spherical locus of potential sites of the nerve equidistant from a first position of the at least one stimulation electrode using a distance, calculated based on the detected muscle reaction, between the first position of the at least one stimulation electrode and the nerve; determine, for the first area and the second area, a second spherical locus of potential sites of the nerve equidistant from a second position of the at least one stimulation electrode using a distance, calculated based on the detected muscle reaction, between the second position of the at least one stimulation electrode and the nerve; map a first location on the nerve by determining a first intersection between the first spherical locus at the first area and the second spherical locus at the first area; map a second location on the nerve by determining a second intersection between the first spherical locus at the second area and the second spherical locus at the second area; and determine a route of the nerve as the nerve passes between the first location on the nerve and the second location on the nerve based on a determined curve between the first location on the nerve and the second location on the nerve.