Self-resonant inductor wound portion of an implantable lead for enhanced MRI compatibility of active implantable medical devices
First Claim
1. An implantable lead, comprising:
- a) at least one lead conductor extending from a proximal conductor end to a distal conductor portion having a distal conductor end, wherein the proximal conductor end is configured to be removably connectable or non-removably connected to electronic circuits of a medical device;
b) at least one electrode contactable with biological cells, wherein the electrode is electrically and physically connected to the distal conductor portion or the distal conductor end; and
c) a self-resonant inductor physically and electrically in series at or proximally adjacent to the at least one electrode, wherein the self-resonant inductor is of a continuous length of the at least one lead conductor and comprises;
i) a first insulated coiled portion of the continuous length of the lead conductor extending along a longitudinal axis in a distal direction from a first coiled portion proximal end to a first coiled portion distal end;
ii) a second insulated coiled portion of the continuous length of the lead conductor extending along the longitudinal axis in a proximal direction from a second coil portion distal end adjacent to the first coiled portion distal end to a second coiled portion proximal end; and
iii) a third insulated coiled portion of the continuous length of the lead conductor extending along the longitudinal axis in a distal direction from a third coiled portion proximal end adjacent to the second coiled portion proximal end to a third coiled portion distal end;
d) wherein the self-resonant inductor comprises parasitic capacitance between;
i) axially extending and immediately adjacent surfaces of immediately adjacent ones of the first, second and third coiled portions of the continuous length of the lead conductor, andii) the immediately adjacent first and second coiled portions and the immediately adjacent second and third coiled portions aligned substantially perpendicular to the longitudinal axis, andiii) the immediately adjacent first and second coiled portions and the immediately adjacent second and third coiled portions at an angle other than substantially perpendicular to the longitudinal axis,e) wherein the self-resonant inductor is resonant at a first center frequency or across a range of frequencies about the first center frequency.
5 Assignments
0 Petitions
Accused Products
Abstract
An implantable lead includes a lead conductor having a length extending from a proximal end to a distal end. A self-resonant inductor is connected in series along a portion of the length of the lead conductor. The self-resonant inductor includes a single length of conductive material including a dielectric coating substantially surrounding the single length of conductive material. The self-resonant inductor includes a first coiled or spiral conductor disposed along an inductor section spanning in a first direction from a first location to a second location. A second coiled or spiral conductor is disposed along the inductor section spanning in a second direction from the second location to the first location, where the second direction is opposite the first direction. A third coiled or spiral conductor is disposed along the inductor section spanning in the first direction from the first location to the second location.
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Citations
70 Claims
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1. An implantable lead, comprising:
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a) at least one lead conductor extending from a proximal conductor end to a distal conductor portion having a distal conductor end, wherein the proximal conductor end is configured to be removably connectable or non-removably connected to electronic circuits of a medical device; b) at least one electrode contactable with biological cells, wherein the electrode is electrically and physically connected to the distal conductor portion or the distal conductor end; and c) a self-resonant inductor physically and electrically in series at or proximally adjacent to the at least one electrode, wherein the self-resonant inductor is of a continuous length of the at least one lead conductor and comprises; i) a first insulated coiled portion of the continuous length of the lead conductor extending along a longitudinal axis in a distal direction from a first coiled portion proximal end to a first coiled portion distal end; ii) a second insulated coiled portion of the continuous length of the lead conductor extending along the longitudinal axis in a proximal direction from a second coil portion distal end adjacent to the first coiled portion distal end to a second coiled portion proximal end; and iii) a third insulated coiled portion of the continuous length of the lead conductor extending along the longitudinal axis in a distal direction from a third coiled portion proximal end adjacent to the second coiled portion proximal end to a third coiled portion distal end; d) wherein the self-resonant inductor comprises parasitic capacitance between; i) axially extending and immediately adjacent surfaces of immediately adjacent ones of the first, second and third coiled portions of the continuous length of the lead conductor, and ii) the immediately adjacent first and second coiled portions and the immediately adjacent second and third coiled portions aligned substantially perpendicular to the longitudinal axis, and iii) the immediately adjacent first and second coiled portions and the immediately adjacent second and third coiled portions at an angle other than substantially perpendicular to the longitudinal axis, e) wherein the self-resonant inductor is resonant at a first center frequency or across a range of frequencies about the first center frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An elongate electrical medical lead, comprising:
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a) at least one conductor with opposing proximal and distal conductor portions, wherein the proximal conductor portion is configured to be removably connectable or non-removably connected to electronic circuits of a medical device; and b) at least one electrode contactable with biological cells, wherein the electrode is electrically and physically connected to the distal conductor portion or the distal conductor end, c) wherein a continuous length of the at least one conductor comprises a first conductor section that extends in a first lengthwise direction along a longitudinal axis for a first physical length, then turns to define at least one reverse conductor section that extends in a substantially opposing lengthwise direction along the longitudinal axis for a second physical length, and then turns again to define a third conductor section that extends in the first lengthwise direction along the longitudinal axis for a third physical length, d) wherein at least the first and reverse conductor sections or the reverse and third conductor sections are coiled conductor sections and have a parasitic capacitance between; i) axially extending and immediately adjacent surfaces of the immediately adjacent first and reverse coiled sections or the immediately adjacent reverse and third coiled sections of the continuous length of the lead conductor, and ii) at least one of the immediately adjacent first and reverse coiled sections and the immediately adjacent reverse and third coiled sections, as the case may be, aligned substantially perpendicular to the longitudinal axis, and iii) at least one of the immediately adjacent first and reverse coiled sections and the immediately adjacent reverse and third coiled sections, as the case may be, at an angle other than substantially perpendicular to the longitudinal axis; e) wherein the at least first and reverse coiled conductor sections and the reverse and third coiled conductor sections, as the case may be, have an inductance with an associated resistance and the parasitic capacitance with an associated resistance which inductance and parasitic capacitance and their respective resistances together determine a circuit Q having a resultant 3-dB bandwidth that is at least 128 kHz. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. An implantable lead, comprising:
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a) at least one lead conductor extending from a proximal conductor end to a distal conductor portion having a distal conductor end, wherein the proximal conductor end is configured to be removably connectable or non-removably connected to electronic circuits of a medical device; b) at least one electrode contactable with biological cells, wherein the electrode is electrically and physically connected to the distal conductor portion or the distal conductor end; and c) a self-resonant inductor physically and electrically in series at or proximally adjacent to the at least one electrode, wherein the self-resonant inductor is of a continuous length of the at least one lead conductor and comprises; i) a first insulated coiled layer of the continuous length of the lead conductor extending along a longitudinal axis in a distal direction from a first coiled layer proximal end to a first coiled layer distal end; ii) a second insulated coiled layer of the continuous length of the lead conductor extending along the longitudinal axis in a proximal direction from a second coiled layer distal end adjacent to the first coiled layer distal end to a second coiled layer proximal end; and iii) a third insulated coiled layer of the continuous length of the lead conductor extending along the longitudinal axis in a distal direction from a third coiled layer proximal end adjacent to the second coiled layer proximal end to a third coiled layer distal end; d) wherein the self-resonant inductor comprises parasitic capacitance between; i) axially extending and immediately adjacent surfaces of immediately adjacent ones of the first, second and third coiled layers of the continuous length of the lead conductor, and ii) the immediately adjacent first and second coiled layers and the immediately adjacent second and third coiled layers aligned substantially perpendicular to the longitudinal axis, and iii) the immediately adjacent first and second coiled layers and the immediately adjacent second and third coiled layers at an angle other than substantially perpendicular to the longitudinal axis, and e) wherein the self-resonant inductor is resonant at a center frequency or across a range of frequencies about the center frequency, f) wherein the center frequency is at or near an MRI RF pulsed frequency, and g) wherein a resultant 3-dB bandwidth of the self-resonant inductor is at least 128 kHz. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. An implantable lead, comprising:
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a) at least one lead conductor extending from a proximal conductor end to a distal conductor portion having a distal conductor end, wherein the proximal conductor end is configured to be removably connectable or non-removably connected to electronic circuits of a medical device; b) at least one electrode contactable with biological cells, wherein the electrode is electrically and physically connected to the distal conductor portion or the distal conductor end; and c) a self-resonant inductor in series at or proximally adjacent to the at least one electrode, wherein the self-resonant inductor is of a continuous length of the at least one lead conductor and comprises; i) two or more even number of insulated coiled layers of the continuous length of the lead conductor extending proximally and distally from a first location to a second location along a longitudinal axis; and ii) a return conductor electrically and physically connected to the electrode; d) wherein the self-resonant inductor comprises parasitic capacitance between; i) axially extending and immediately adjacent surfaces of two immediately adjacent coiled layers of the two or more even number of coiled layers of the continuous length of the lead conductor, and ii) the two immediately adjacent coiled layers aligned substantially perpendicular to the longitudinal axis, and iii) the two immediately adjacent coiled layers at an angle other than substantially perpendicular to the longitudinal axis, e) wherein the self-resonant inductor is resonant at or near an MRI RF pulsed frequency, and f) wherein the self-resonant inductor has an inductance with an associated resistance and the parasitic capacitance with an associated resistance which inductance and parasitic capacitance and their respective resistances together provide a circuit Q having a resultant 3-dB bandwidth that is at least 128 kHz. - View Dependent Claims (54, 55, 56, 57, 58)
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59. An implantable lead, comprising:
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a) a lead conductor having a length extending from a proximal conductor end to a distal conductor portion having distal conductor end; and b) at least one electrode contactable with biological cells, wherein the electrode is electrically and physically connected to the distal conductor portion or the distal conductor end; and c) a self-resonant inductor physically and electrically in series with the electrode, the self-resonant inductor comprising a dielectric coating substantially surrounding a continuous length of the at least one lead conductor, wherein the self-resonant inductor comprises three or more odd number of insulated coiled layers of the continuous length of the lead conductor extending either proximally or distally along a longitudinal axis, d) wherein the self-resonant inductor comprises a parasitic capacitance between; i) axially extending and immediately adjacent surfaces of two immediately adjacent coiled layers of the three or more odd number of coiled layers of the continuous length of the lead conductor, and ii) the two immediately adjacent coiled layers aligned substantially perpendicular to the longitudinal axis, and iii) the two immediately adjacent coiled layers at an angle other than substantially perpendicular to the longitudinal axis, and d) wherein the self-resonant inductor has an inductance with an associated resistance and the parasitic capacitance with an associated resistance which inductance and parasitic capacitance and their respective resistances together provide a circuit Q having a resultant 3-dB bandwidth that is at least 128 kHz. - View Dependent Claims (60, 61, 62, 63, 64)
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65. An implantable lead, comprising:
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a) at least one lead conductor extending from a proximal conductor end to a distal conductor portion having a distal conductor end, wherein the proximal conductor end is configured to be removably connectable or non-removably connected to electronic circuits of an active implantable medical device; b) at least one electrode contactable with biological cells, wherein the electrode is electrically and physically connected to the distal conductor portion or the distal conductor end; and c) a self-resonant inductor physically and electrically in series at or proximally adjacent to the at least one electrode, wherein the self-resonant inductor is of a continuous length of the at least one lead conductor and comprises at least two insulated coiled conductors, and wherein; i) a first one of the at least two insulated coiled portions of the continuous length of the lead conductor extends along a longitudinal axis in a distal direction from a first coiled portion proximal end to a first coiled portion distal end; ii) a return conductor extends in a proximal direction from a return conductor distal end connected to the first coiled portion distal end to a return conductor proximal end; and iii) a second one of the at least two insulated coiled portions of the continuous length of the lead conductor extends along the longitudinal axis in a distal direction from a second coiled portion proximal end adjacent to the return conductor proximal end to a second coiled portion distal end; d) wherein the self-resonant inductor comprises parasitic capacitance between; i) axially extending and immediately adjacent surfaces of the immediately adjacent first and second coiled portions of the continuous length of the lead conductor, and ii) the immediately adjacent first and second coiled portions aligned substantially perpendicular to the longitudinal axis, and iii) the immediately adjacent first and second coiled portions at an angle other than substantially perpendicular to the longitudinal axis, e) wherein the self-resonant inductor is resonant at a first center frequency or across a range of frequencies about the first center frequency. - View Dependent Claims (66, 67, 68)
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69. An implantable lead, comprising:
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a) at least one lead conductor extending from a proximal conductor end to a distal conductor portion having a distal conductor end, wherein the proximal conductor end is configured to be removably connectable or non-removably connected to electronic circuits of an active implantable medical device; b) at least one electrode contactable with biological cells, wherein the electrode is electrically and physically connected to the distal conductor portion or the distal conductor end; and c) a self-resonant inductor physically and electrically in series at or proximally adjacent to the at least one electrode, wherein the self-resonant inductor comprises at least two insulated coiled portions of a continuous length of the lead conductor, and wherein; i) a first one of the at least two insulated coiled portions of the continuous length of the lead conductor extends along a longitudinal axis in a distal direction from a first coiled portion proximal end to a first coiled conductor distal end; and ii) a second one of the at least two insulated coiled portions of the continuous length of the lead conductor extends in a proximal direction from a second coil portion distal end adjacent to the first coiled portion distal end to a second coiled portion proximal end; d) wherein the self-resonant inductor comprises a total parasitic capacitance between; i) axially extending and immediately adjacent surfaces of the immediately adjacent first and second coiled portions of the continuous length of the lead conductor, and ii) the immediately adjacent first and second coiled portions aligned substantially perpendicular to the longitudinal axis, and iii) the immediately adjacent first and second portions at an angle other than substantially perpendicular to the longitudinal axis, e) wherein the self-resonant inductor is resonant at a first center frequency or across a range of frequencies about the first center frequency. - View Dependent Claims (70)
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Specification