MRI compatible medical device lead including transmission line notch filters
First Claim
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1. A medical device lead comprising:
- a conductor extending through a lead body and including a proximal end and a distal end; and
one or more band stop filters each having a first end and a second end and including a conductive coil, at least one of the first end and second end of each band stop filter coupled to the conductor, wherein a length of each band stop filter is such that, at magnetic resonance imaging (MRI) frequencies, the band stop filter phase shifts an MRI-induced signal on the conductor by 180°
to attenuate the MRI-induced signal on the conductor.
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Abstract
A medical device lead includes a conductor and one or more band stop filters. The conductor extends through a lead body and includes a proximal end and a distal end. The one or more band stop filters each have a first end and a second end and include a conductive coil. At least one of the first end and second end of each band stop filter is coupled to the conductor. A length of each band stop filter is such that, at magnetic resonance imaging (MRI) frequencies, the band stop filter phase shifts an MRI-induced signal on the conductor by 180° to attenuate the MRI-induced signal on the conductor.
100 Citations
21 Claims
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1. A medical device lead comprising:
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a conductor extending through a lead body and including a proximal end and a distal end; and one or more band stop filters each having a first end and a second end and including a conductive coil, at least one of the first end and second end of each band stop filter coupled to the conductor, wherein a length of each band stop filter is such that, at magnetic resonance imaging (MRI) frequencies, the band stop filter phase shifts an MRI-induced signal on the conductor by 180°
to attenuate the MRI-induced signal on the conductor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A medical device lead comprising:
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a lead body including a conductor extending from a proximal end, which is configured to be connected to a pulse generator, to a distal end; and one or more band stop filters within the lead body each including a conductive element having a length, a first end, and a second end, at least a portion of the conductive element forming a conductive coil, wherein each band stop filter is coupled to the conductor such that an MRI-induced signal on the conductor propagates through the band stop filter a total distance of approximately one-half wavelength of the MRI-induced signal. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A medical device, comprising:
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a pulse generator; and a lead including an electrode configured to contact tissue in a coronary vessel, a lead conductor connecting the pulse generator with the electrode, and one or more band stop filters each coupled to the lead conductor, wherein each band stop filter includes a conductive element having a length, a first end, and a second end, at least a portion of the conductive element forming a conductive coil, and wherein the length of each conductive element is such that, at magnetic resonance imaging (MRI) frequencies, the band stop filter phase shifts an MRI-induced signal on the conductor by 180°
to attenuate the MRI-induced signal on the conductor. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification