MRI COMPATIBLE MEDICAL LEADS
First Claim
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1. An MRI compatible lead, comprising:
- at least one elongate conductor comprising at least one coiled segment defining an inductor;
at least one electrode in electrical communication with the at least one conductor;
and at least one frequency dependent circuit in communication with the at least one conductor, the at least one frequency dependent circuit comprising the inductor defined by the coiled conductor segment, wherein the coiled segment inductor resides upstream of the at least one electrode, and wherein the at least one frequency dependent circuit is configured to have a high impedance at an MRI scanner operating frequency in the MHz frequency range to thereby inhibit unwanted MRI related RF-induced tissue heating by the at least one electrode.
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Abstract
Herein is disclosed a probe, including a first electrode disposed at least partially on the probe surface, a second electrode disposed at least partially on the probe surface, a first conductor electrically coupled to the first electrode, a second conductor electrically coupled to the second electrode, and a reactive element electrically coupling the first conductor and the second conductor.
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Citations
20 Claims
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1. An MRI compatible lead, comprising:
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at least one elongate conductor comprising at least one coiled segment defining an inductor;
at least one electrode in electrical communication with the at least one conductor;
and at least one frequency dependent circuit in communication with the at least one conductor, the at least one frequency dependent circuit comprising the inductor defined by the coiled conductor segment, wherein the coiled segment inductor resides upstream of the at least one electrode, and wherein the at least one frequency dependent circuit is configured to have a high impedance at an MRI scanner operating frequency in the MHz frequency range to thereby inhibit unwanted MRI related RF-induced tissue heating by the at least one electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An MRI compatible lead, comprising:
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at least one elongate conductor;
at least one electrode in electrical communication with a distal portion of the at least one conductor; and
at least one RF filter in communication with the at least one conductor, the at least one RF filter comprising a frequency dependent circuit residing at a distal portion of the lead upstream of the at least one electrode, wherein the RF filters configured to;
(a) have a high impedance at an MRI scanner operating frequency in the MHz frequency range to thereby inhibit unwanted tissue heating from the at least one electrode when in an MRI system and;
(b) to allow at least one of (i) energy in the KHz range to be delivered along the at least one conductor to the at least one electrode and (ii) the at least one electrode to detect electrophysiology signals at low frequency and transmit the detected signals along the conductor. - View Dependent Claims (15)
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16. A medical lead, comprising:
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at least one conductor having opposing distal and proximal end portions;
at least one electrode in communication with the distal end portion of the at least one conductor; and
an RF filter having a resonant circuit operatively connected to the at least one conductor upstream of the at least one electrode, wherein the resonant circuit is substantially tuned to an RF excitation signal frequency of an MRI scanner to thereby generate a high impedance at an operating frequency of the MRI scanner. - View Dependent Claims (17, 18, 19, 20)
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Specification