MRI and RF compatible leads and related methods of operating and fabricating leads
First Claim
Patent Images
1. An MRI/RF compatible medical lead system, comprising:
- a lead having, a proximal end portion, a distal end portion, and a length extending from the proximal end portion to the distal end portion, the lead comprising at least one electrode disposed along the distal end portion of the lead and at least one conductor having a length with opposing proximal and distal end portions. wherein each conductor of the at least one conductor is configured with a plurality of current suppression modules along the length thereof, wherein each current suppression module comprises a first forward segment extending in a forward lengthwise direction, relative to the length of the lead toward the at least one electrode, a reverse segment that turns away from the first forward segment and extends in an opposing reverse lengthwise direction, relative to the length of the lead, opposite the forward lengthwise direction, and a second forward segment that turns away from the reverse segment and extends in the forward lengthwise segment, wherein the first forward segment, reverse segment, and second forward segment form a transversely stacked arrangement of lengthwise extending segments; and
at least one contact disposed along the proximal end portion of the lead;
wherein the at least one conductor electrically couples the at least one contact to the at least one electrode and wherein each conductor of the at least one conductor comprises a wire that extends continuously from at least one of the at least one contact to at least one of the at least one electrode.
7 Assignments
0 Petitions
Accused Products
Abstract
RF/MRI compatible leads include at least one conductor that turns back on itself at least twice in a lengthwise direction, and can turn back on itself at least twice at multiple locations along its length. The at least one electrical lead can be configured so that the lead heats local tissue less than about 10 degrees Celsius (typically about 5 degrees Celsius or less) or does not heat local tissue when a patient is exposed to target RF frequencies at a peak input SAR of at least about 4 W/kg and/or a whole body average SAR of at least about 2W/kg. Related devices and methods of fabricating leads are also described.
-
Citations
34 Claims
-
1. An MRI/RF compatible medical lead system, comprising:
-
a lead having, a proximal end portion, a distal end portion, and a length extending from the proximal end portion to the distal end portion, the lead comprising at least one electrode disposed along the distal end portion of the lead and at least one conductor having a length with opposing proximal and distal end portions. wherein each conductor of the at least one conductor is configured with a plurality of current suppression modules along the length thereof, wherein each current suppression module comprises a first forward segment extending in a forward lengthwise direction, relative to the length of the lead toward the at least one electrode, a reverse segment that turns away from the first forward segment and extends in an opposing reverse lengthwise direction, relative to the length of the lead, opposite the forward lengthwise direction, and a second forward segment that turns away from the reverse segment and extends in the forward lengthwise segment, wherein the first forward segment, reverse segment, and second forward segment form a transversely stacked arrangement of lengthwise extending segments; and at least one contact disposed along the proximal end portion of the lead; wherein the at least one conductor electrically couples the at least one contact to the at least one electrode and wherein each conductor of the at least one conductor comprises a wire that extends continuously from at least one of the at least one contact to at least one of the at least one electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A lead having a proximal end and a distal end, the lead comprising:
-
an outer layer of a biocompatible polymer material extending from the proximal end to the distal end of the lead; at least one contact disposed along the proximal end of the lead; at least one electrode disposed along the distal end of the lead; and at least one conductor with each conductor having a plurality of spaced apart current suppression modules formed by the conductor, wherein at least one of the current suppression modules comprises a length of the conductor having a plurality of closely spaced conductor portions in a serpentine shape with respect to the outer layer, wherein the conductor portions comprise a first conductor portion, a second conductor portion, and a third conductor portion, wherein the first conductor portion extends toward the distal end of the lead and turns into the second conductor portion that extends away from the distal end of the lead and then turns into the third conductor portion that extends toward the distal end of the lead, wherein the first conductor portion, second conductor portion, and third conductor portion form a transversely stacked arrangement of lengthwise extending conductor portions, wherein the at least one conductor electrically couples the at least one contact to the at least one electrode and wherein each conductor of the at least one conductor comprises a wire that extends continuously from at least one of the at least one contact to at least one of the at least one electrode. - View Dependent Claims (20, 21, 22, 23, 24, 25)
-
-
26. An MRI safe lead system, comprising:
-
an elongate flexible lead having a proximal end portion and a distal end portion, the lead comprising a plurality of conductors having a length with opposing proximal and distal end portions, wherein each conductor contains a plurality of current suppression modules along the length of each conductor, each current suppression module comprising at least one coiled segment of the conductor; a plurality of contacts disposed along the proximal end portion of the lead; and a plurality of electrodes disposed along the distal end portion of the lead, the conductors electrically coupling at least one of the contacts to at least one of the electrodes, wherein each conductor of the plurality of conductors comprises a wire that extends continuously from at least one of the contacts to at least one of the electrodes. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34)
-
Specification