Apparatus and method for determining the relative position and orientation of neurostimulation leads
DCFirst Claim
1. A method of performing a medical procedure using a plurality of electrodes implanted within a patient, comprising:
- measuring a first monopolar electrical impedance between a first one of the electrodes and a return or reference electrode;
measuring a second monopolar electrical impedance between each of at least one of the electrodes and the return or reference electrode;
measuring a bipolar electrical impedance between the first one of the electrodes and each of the at least one electrode;
determining the amplitude of a field potential at each of at least one of the electrodes based on the measured first monopolar electrical impedance, each of the second monopolar electrical impedances, and each of the measured bipolar electrical impedances; and
determining the relative positions of the electrodes based on each of the determined field potential amplitudes.
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Abstract
A method for determining whether the relative position of electrodes used by a neurostimulation system has changed within a patient comprises determining the amplitude of a field potential at each of at least one of the electrodes, determining if a change in each of the determined electric field amplitudes has occurred, and analyzing the change in each of the determined electric field amplitudes to determine whether a change in the relative position of the electrodes has occurred. Another method comprises measuring a first monopolar impedance between a first electrode and a reference electrode, measuring a second monopolar impedance between second electrode and the reference electrode, measuring a bipolar impedance between the first and second electrodes, and estimating an amplitude of a field potential at the second electrode based on the first and second monopolar impedances and the bipolar impedance.
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Citations
28 Claims
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1. A method of performing a medical procedure using a plurality of electrodes implanted within a patient, comprising:
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measuring a first monopolar electrical impedance between a first one of the electrodes and a return or reference electrode; measuring a second monopolar electrical impedance between each of at least one of the electrodes and the return or reference electrode; measuring a bipolar electrical impedance between the first one of the electrodes and each of the at least one electrode; determining the amplitude of a field potential at each of at least one of the electrodes based on the measured first monopolar electrical impedance, each of the second monopolar electrical impedances, and each of the measured bipolar electrical impedances; and determining the relative positions of the electrodes based on each of the determined field potential amplitudes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for performing a medical procedure using a plurality of electrodes implanted within a patient, comprising:
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measuring a first monopolar impedance between a first one of the electrodes and a return or reference electrode; measuring a second monopolar impedance between a second one of the electrodes and the return or reference electrode; measuring a bipolar impedance between the first electrode and the second electrode; and estimating an amplitude of a field potential at the second electrode based on the first and second monopolar impedances and the bipolar impedance. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for performing a medical procedure using a plurality of electrodes implanted within a patient, comprising:
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performing two of the following;
(1) measuring a first monopolar impedance between a first one of the electrodes and a return or reference electrode, and measuring a second monopolar impedance between a second one of the electrodes and the return or reference electrode;
(2) measuring a bipolar impedance between the first electrode and the second electrode; and
(3) measuring a field potential at the second electrode; andestimating a remaining one of the (1) first and second monopolar impedances;
(2) the bipolar impedance; and
(3) the field potential based on the performance of the two measurements. - View Dependent Claims (28)
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Specification