Method and apparatus for shunting induced currents in an electrical lead
First Claim
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1. An electrical lead, comprising:
- an elongate body having a proximal end portion and a distal end portion;
a first electrode disposed near the distal end portion of the elongate body;
a first conductor electrically coupled to the first electrode;
a second electrode disposed adjacent the elongate body;
a capacitive device electrically coupled to the first conductor and the second electrode; and
a component coupled to the first conductor to selectively limit current through the first electrode.
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Abstract
An electrical lead includes an elongate body having a proximal end portion and a distal end portion, a first electrode disposed adjacent and joined to the distal end portion of the elongate body. Current flow within the first electrode is limited when a predetermined condition occurs, such as the generation of an electromagnetic field having a predetermined frequency range. The medical electrical lead may further comprise one or more second electrodes disposed adjacent the first electrode and joined to the elongate body to shunt current to body tissue when the predetermined condition occurs.
199 Citations
34 Claims
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1. An electrical lead, comprising:
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an elongate body having a proximal end portion and a distal end portion;
a first electrode disposed near the distal end portion of the elongate body;
a first conductor electrically coupled to the first electrode;
a second electrode disposed adjacent the elongate body;
a capacitive device electrically coupled to the first conductor and the second electrode; and
a component coupled to the first conductor to selectively limit current through the first electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A medical electrical lead for an implantable medical device having a sensor to sense a predetermined physiological condition, comprising:
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an elongate body;
an electrode;
a component coupled to the elongate body to limit the flow of current through the electrode upon detection of the predetermined physiological condition. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of utilizing a medical electrical lead, wherein the lead includes an elongate body and an electrode coupled to the elongate body, comprising the steps of:
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a.) providing a primary current path within the elongate body to the electrode;
b.) limiting current in the primary current path when a predetermined condition is present within the medical electrical lead;
c.) providing at least one secondary current path to carry current when the predetermined condition is sensed. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification