Implantable medical lead with helical reinforcement
First Claim
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1. A medical lead for use with an implantable medical device, the medical lead comprising:
- a lead body with an outer jacket, wherein the outer jacket comprises;
a first insulative layer;
a second insulative layer inside the first insulative layer; and
a coiled wire embedded between the first layer and the second layer of the outer jacket;
a stylet guide tube disposed inside the outer jacket;
a raised reinforcement that defines a substantially helical channel that extends about the stylet guide tube; and
conductors that extend about the stylet guide tube in the helical channel defined by the raised reinforcement.
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Abstract
An implantable lead has a lead body construction designed to accommodate loading forces exerted on the lead body during patient movement. The lead body may be sufficiently stretchable to resist forces that could otherwise cause lead failure, axial migration of the electrodes, anchor damage, or tissue damage. Increasing stretchability of a lead body can also increase the vulnerability of the lead body to flex fatigue, buckling fatigue, kinking, and crush. Therefore, the lead described herein includes a reinforcement to create a lead body that is resistant to flex fatigue, buckling fatigue, kinking and crush.
167 Citations
46 Claims
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1. A medical lead for use with an implantable medical device, the medical lead comprising:
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a lead body with an outer jacket, wherein the outer jacket comprises; a first insulative layer; a second insulative layer inside the first insulative layer; and a coiled wire embedded between the first layer and the second layer of the outer jacket; a stylet guide tube disposed inside the outer jacket; a raised reinforcement that defines a substantially helical channel that extends about the stylet guide tube; and conductors that extend about the stylet guide tube in the helical channel defined by the raised reinforcement. - 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, 30, 31)
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24. An implantable medical device comprising:
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a housing; an implantable pulse generator, within the housing, that generates electrical stimulation pulses; and an implantable lead, extending from the housing, and comprising a lead body with an outer jacket, a stylet guide tube disposed inside the outer jacket, a raised reinforcement that defines a substantially helical channel that extends about the stylet guide tube, and conductors that extend about the stylet guide tube in the helical channel defined by the reinforcement, wherein at least a portion of the raised reinforcement is integrally formed with the stylet guide tube, wherein the reinforcement defines a substantially cylindrical tube and includes a raised helical thread formed on an outer surface of the cylindrical tube, and wherein the substantially helical channel is formed between adjacent turns of the raised helical thread. - View Dependent Claims (25, 27, 28, 29, 32, 33)
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26. An implantable medical device comprising:
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a housing; an implantable pulse generator, within the housing, that generates electrical stimulation pulses; and an implantable lead, extending from the housing, and comprising a lead body with an outer jacket, a stylet guide tube disposed inside the outer jacket, a reinforcement that defines a substantially helical channel that extends about the stylet guide tube, and conductors that extend about the stylet guide tube in the helical channel defined by the reinforcement, wherein the stylet guide tube is coiled in a first direction and the reinforcement is coiled in a second direction different from the first direction.
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34. A medical lead for use with an implantable medical device, the medical lead comprising:
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a lead body with an outer jacket; a stylet guide tube disposed inside the outer jacket; a reinforcement that defines a substantially helical channel that extends about the stylet guide tube, wherein at least a portion of the reinforcement is integrally formed with the stylet guide tube, wherein the reinforcement defines a substantially cylindrical tube and includes a raised helical thread formed on an outer surface of the cylindrical tube, and wherein the substantially helical channel is formed between adjacent turns of the raised helical thread; and conductors that extend about the stylet guide tube in the helical channel defined by the reinforcement, wherein the conductors do not overlap the reinforcement and the reinforcement does not overlap the conductors. - View Dependent Claims (35, 36)
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37. A medical lead for use with an implantable medical device, the medical lead comprising:
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a lead body with an outer jacket; a reinforcement that defines a substantially cylindrical tube, and includes a raised helical thread formed on an outer surface of the cylindrical tube, the raised helical thread defining a substantially helical channel between adjacent turns of the raised helical thread; and conductors that extend about the cylindrical tube in the helical channel defined by the reinforcement. - View Dependent Claims (38, 39, 40, 41, 42)
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43. A medical lead for use with an implantable medical device, the medical lead comprising:
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a lead body with an outer jacket; a stylet guide tube disposed inside the outer jacket; a reinforcement that defines a substantially helical channel that extends about the stylet guide tube, wherein the stylet guide tube is coiled in a first direction and the reinforcement comprises a reinforcement coil that is coiled about the stylet guide tube, wherein the substantially helical channel is formed between adjacent turns in the coil, and wherein the reinforcement coil is coiled in a second direction different from the first direction; and conductors that extend about the stylet guide tube in the helical channel defined by the raised reinforcement. - View Dependent Claims (44, 45)
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46. A medical lead for use with an implantable medical device, the medical lead comprising:
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a lead body; means for guiding a stylet within the lead body; means for defining a substantially helical, trough-like channel that extends about the guiding means, wherein at least a portion of the defining means is integrally formed with the guiding means, wherein the defining means comprises a substantially cylindrical tube and a raised helical thread formed on an outer surface of the cylindrical tube, and wherein the substantially helical channel is defined between adjacent turns of the raised helical thread; and conductors that extend about the guiding means within the substantially helical channel.
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Specification