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EAD BODY WITH A VARIABLE OUTER DIAMETER GEOMETRY AND NON-UNIFORM CENTERPOINT

IP.com Disclosure Number: IPCOM000237646D
Publication Date: 2014-Jul-01
Document File: 3 page(s) / 422K

Publishing Venue

The IP.com Prior Art Database

Abstract

Various lead bodies can be composed of one or more coil conductors, one or more cables conductors, and polymeric layers in between the conductors. In one example, a lead includes three cable conductors and one coil conductor. The polymeric layers can serve various purposes, such as providing electrical insulation and contributing to the overall mechanical integrity of the lead (e.g., axial strength and flexural fatigue strength). A lead body can be molded or extruded (e.g., from polymer material) to have one or more lumens and an outer diameter. The lead can electrically connect with an implantable medical device for delivering stimulation and/or sensing, such as in a therapeutic cardiac application.

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LEAD BODY WITH A VARIABLE OUTER DIAMETER GEOMETRY AND NON-UNIFORM CENTERPOINT

            Various lead bodies can be composed of one or more coil conductors, one or more cables conductors, and polymeric layers in between the conductors.  In one example, a lead includes three cable conductors and one coil conductor.  The polymeric layers can serve various purposes, such as providing electrical insulation and contributing to the overall mechanical integrity of the lead (e.g., axial strength and flexural fatigue strength).  A lead body can be molded or extruded (e.g., from polymer material) to have one or more lumens and an outer diameter.  The lead can electrically connect with an implantable medical device for delivering stimulation and/or sensing, such as in a therapeutic cardiac application. 

            One or more coil conductors and/or one or more cable conductors can extend within the one or more lumens.  The conductors can electrically connect with respective electrical elements (e.g., electrodes, coils) exposed on the outside of the lead for electrical simulation and/or sensing.  As the conductors electrically connect with the various electrical elements along the lead body, fewer conductors continue to extend distally within the lead body (e.g., each conductor terminates at the electrical element to which it is connected).   For example, the three cable conductors referenced above may terminate along a lead body, where only the coil conductor extends along a distal section of the lead.  The amount of insulation needed also decreases with the reduction in cable conductors.  The distal section of the lead body may be smaller in diameter because fewer conductors (e.g., only one) and corresponding lumens extends along the distal section and because less polymeric insulation is needed.   In addition, in the above embodiments having three cable conductors and one coil conductors, if only the coil conductor extends within the distal section, manufacturing can be simpler because the coil can be concentric with the outer diameter of the lead body.

            A lead body can taper along a section, such as a section containing fewer conductors relative to a proximal section of the lead body.  A tapering lead may be easier to navigate in a vessel and can fit deeper within a tape...