Reduced axial stiffness implantable medical lead
First Claim
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1. A medical lead for use with an implantable medical device, the medical lead comprising:
- a lead body having a proximal end and a distal end, wherein the lead body comprises an outer jacket comprising a first insulative layer, a second insulative layer, and a coiled wire embedded between the first layer and the second layer of the outer jacket;
one or more electrodes at the distal end of the lead body;
one or more electrical contacts at the proximal end of the lead body; and
one or more conductors disposed within the outer jacket and electrically coupling the electrodes and the electrical contacts,wherein the medical lead has an axial stiffness that permits an axial elongation of approximately ten percent to approximately thirty percent without breakage of the medical lead.
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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 is sufficiently stretchable to resist forces that could otherwise cause lead failure, axial migration of the electrodes, anchor damage, or tissue damage. The lead body may include a variety of features that reduce the axial stiffness of the lead without significantly impacting the operation and structural integrity of lead components, such as electrodes, conductors and insulators.
112 Citations
32 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 having a proximal end and a distal end, wherein the lead body comprises an outer jacket comprising a first insulative layer, a second insulative layer, and a coiled wire embedded between the first layer and the second layer of the outer jacket; one or more electrodes at the distal end of the lead body; one or more electrical contacts at the proximal end of the lead body; and one or more conductors disposed within the outer jacket and electrically coupling the electrodes and the electrical contacts, wherein the medical lead has an axial stiffness that permits an axial elongation of approximately ten percent to approximately thirty percent without breakage of the medical lead. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An implantable medical device comprising:
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a housing; an implantable pulse generator, within the housing, that generates electrical stimulation pulses; and a medical lead, extending from the housing, and comprising a lead body having a proximal end and a distal end, wherein the lead body comprises an outer jacket comprising a first insulative layer, a second insulative layer, and a coiled wire embedded between the first layer and the second layer of the outer jacket, one or more electrodes at the distal end of the lead body, one or more electrical contacts at the proximal end of the lead body, and one or more conductors disposed within the outer jacket and electrically coupling the electrodes and the electrical contacts, wherein the medical lead has an axial stiffness that permits an axial elongation of approximately ten percent to approximately thirty percent without breakage of the medical lead. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification