Mri compatible medical device lead including transmission line notch filters
AssigneeCardiac Pacemakers, Inc.
InventorMasoud Ameri
Life of this patent
Estimating the term…
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.
Claims21
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.
A medical device lead comprising:
- 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.
A medical device, comprising:
- 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.
Dependencies are inferred from the claim text.