MRI compatible conductive wires
First Claim
1. An MRI compatible lead assembly comprising:
- an elongate body having a proximal end and a distal end, said elongate body defining a lumen therewithin, the distal end arranged and configured to contact tissue and the proximal end operably coupled to an electronic control;
at least one electrode located on the elongate body; and
at least one electrical circuit in communication with said at least one electrode, said circuit housed within said elongate body and comprising a single, continuous length of electrode wire, said single, continuous length of electrode wire forming a non-resonant filter and a first and second resonant LC filter, said first resonant LC filter positioned adjacent said at least one electrode and said second resonant LC filter positioned adjacent a proximal termination of the lead assembly.
1 Assignment
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Accused Products
Abstract
An MRI compatible electrode circuit construct is provided. The construct includes at least three filter components constructed from a continuous or non-continuous electrode wire. One filter component may be a resonant LC filter proximate an electrode/wire interface. A second filter component may be a resonant LC filter adjacent a proximal termination of the wire construct. The filters resolve the issue of insufficient attenuation by effectively blocking the RF induced current on the wire from exiting the wire through the electrode and at the terminal or proximal end. The third filter component may include one or more non-resonant filter(s) positioned along the length of the electrode wire that resolve(s) the issue of excessive heating of the resonant LC filters by significantly attenuating the current induced on the wire before it reaches the resonant LC filters.
58 Citations
43 Claims
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1. An MRI compatible lead assembly comprising:
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an elongate body having a proximal end and a distal end, said elongate body defining a lumen therewithin, the distal end arranged and configured to contact tissue and the proximal end operably coupled to an electronic control; at least one electrode located on the elongate body; and at least one electrical circuit in communication with said at least one electrode, said circuit housed within said elongate body and comprising a single, continuous length of electrode wire, said single, continuous length of electrode wire forming a non-resonant filter and a first and second resonant LC filter, said first resonant LC filter positioned adjacent said at least one electrode and said second resonant LC filter positioned adjacent a proximal termination of the lead assembly. - View Dependent Claims (9, 10, 11, 12, 13, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 43)
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2. An MRI compatible lead assembly comprising:
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an elongate body having a proximal end and a distal end, said elongate body defining a lumen therewithin, the distal end arranged and configured to contact tissue and the proximal end operably coupled to an electronic control; at least one electrode located on the elongate body; and at least one electrical circuit in communication with said at least one electrode, said circuit housed within said elongate body and comprising one or more electrode wires, said one or more electrode wires forming at least two non-resonant filters having a substantially uniformly distributed inductance along the length of said electrode wire and first and second resonant LC filters, said first resonant LC filter positioned proximate said at least one electrode and second said resonant LC filter positioned adjacent a proximal termination end of the lead assembly. - View Dependent Claims (3, 4, 14)
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5. An MRI compatible lead assembly comprising:
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an elongate body having a proximal end and a distal end, said elongate body defining a lumen therewithin, the distal end arranged and configured to contact tissue and the proximal end operably coupled to an electronic control; at least one electrode located on the elongate body; and at least one electrical circuit in communication with said at least one electrode, said circuit housed within said elongate body and comprising a single continuous length of electrode wire, said single continuous length of electrode wire forming at least two non-resonant filters positioned in a spaced-apart relationship and having a substantially uniformly distributed inductance along the length of said electrode wire and a first and second resonant LC filter, said first resonant LC filter positioned proximate said at least one electrode and said second LC filter positioned adjacent a proximal termination end of the lead assembly. - View Dependent Claims (6)
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7. An MRI compatible lead assembly comprising:
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an elongate body having a proximal end and a distal end, said elongate body defining a lumen therewithin, the distal end operably coupled to at least one electrode and the proximal end operably coupled to an electronic control; said at least one electrode arranged and configured to contact tissue; and at least one electrical circuit in communication with said at least one electrode, said circuit housed within said elongate body and comprising a single, continuous length of electrode wire, said single, continuous length of electrode wire forming a non-resonant filter and first and second resonant LC filters, said first resonant LC filter positioned proximate said at least one electrode and said second resonant LC filter positioned adjacent a proximal termination end of said lead assembly. - View Dependent Claims (8, 15, 16, 17, 31, 42)
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Specification