METHOD AND APPARATUS FOR DETERMINING RELATIVE POSITIONING BETWEEN NEUROSTIMULATION LEADS
First Claim
1. A method of operating two leads disposed adjacent tissue of a patient, the method comprising:
- activating a first one of a pair of electrodes respectively carried by the two leads to generate an electrical field within the tissue;
measuring an electrical parameter in response to the generated electrical field at a second one of the pair of electrodes;
measuring a reference electrical parameter in response to the generated electrical field at a reference electrode carried by the same one of the two leads that carries the first electrode, wherein a reference distance between the first electrode and the reference electrode is known prior to the generation of the electrical field;
computing a ratio between the measured electrical parameter and the measured reference electrical parameter; and
computing a distance between the pair of electrodes as a function of the computed ratio and the reference distance.
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Accused Products
Abstract
A method and medical system for operating two leads disposed adjacent tissue of a patient are provided. A first one of a pair of electrodes respectively carried by the two leads is activated to generate an electrical field within the tissue. An electrical parameter in response to the generated electrical field is measured at a second one of the pair of electrodes. A reference electrical parameter is measured in response to the generated electrical field at a reference electrode carried by the same one of the two leads that carries the first electrode. A reference distance between the first electrode and the reference electrode is known prior to the generation of the electrical field. The ratio between the measured electrical parameter and the measured reference electrical parameter is computed, and the distance between the pair of electrodes is computed as a function of the computed ratio and the reference distance.
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Citations
28 Claims
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1. A method of operating two leads disposed adjacent tissue of a patient, the method comprising:
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activating a first one of a pair of electrodes respectively carried by the two leads to generate an electrical field within the tissue; measuring an electrical parameter in response to the generated electrical field at a second one of the pair of electrodes; measuring a reference electrical parameter in response to the generated electrical field at a reference electrode carried by the same one of the two leads that carries the first electrode, wherein a reference distance between the first electrode and the reference electrode is known prior to the generation of the electrical field; computing a ratio between the measured electrical parameter and the measured reference electrical parameter; and computing a distance between the pair of electrodes as a function of the computed ratio and the reference distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A medical system, comprising:
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a first lead configured for being placed adjacent tissue of a patient, the first lead carrying a first electrode and a reference electrode; a second lead configured for being placed adjacent the tissue of the patient, the second lead carrying a second electrode; a controller configured for activating the first electrode to generate an electrical field within the tissue; monitoring circuitry configured for measuring an electrical parameter in response to the generated electrical field at the second electrode, and measuring a reference electrical parameter in response to the generated electrical field at the reference electrode, wherein a reference distance between the first electrode and the reference electrode is known prior to generation of the electrical field; and at least one processor configured for computing a ratio between the measured electrical parameter and the measured reference electrical parameter, and computing a distance between the first and second electrodes as a function of the computed ratio and the reference distance. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification