SMALL CALIBER IMPLANTABLE BIOMETRIC LEADS AND CABLES FOR SAME
First Claim
1. A cable comprising:
- a conductive central core; and
at least one conductive cable-layer concentric with the central core and surrounding at least one of the conductive central core and a conductive cable-layer interior to itself;
wherein;
each at least one conductive cable-layer is comprised of a plurality of conductive filaments, said filaments configured to provide an elongated contact area between the at least one conductive cable-layer and either the conductive central core or a second conductive cable-layer immediately interior to the at least one conductive cable-layer.
1 Assignment
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Accused Products
Abstract
Implantable medical leads have reduced diameter while providing for optimized mechanical and electrical properties, by reducing the diameters of the conducting cables used within the leads for sensing and delivery of therapeutic electrical stimulation. In an embodiment, conducting filaments within a cable have oval cross-sectional areas. Suitably orienting the oval filaments increases the contact surface between adjacent filaments, broadly distributing the pressure between filaments and reducing fretting fatigue, while the oval cross-sectional area also increases conductivity. In an embodiment, non-conducting coatings around filaments within a cable, or around groups of filaments organized into cable-layers, reduce fretting fatigue. In an embodiment, the cross-sectional area of filaments decreases as the filaments are positioned at increasing radial distances from the center of the cable. In an embodiment, the relative composition of various filament metals and/or alloys is varied in filaments at different radial distances from the center of the cable.
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Citations
21 Claims
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1. A cable comprising:
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a conductive central core; and at least one conductive cable-layer concentric with the central core and surrounding at least one of the conductive central core and a conductive cable-layer interior to itself; wherein; each at least one conductive cable-layer is comprised of a plurality of conductive filaments, said filaments configured to provide an elongated contact area between the at least one conductive cable-layer and either the conductive central core or a second conductive cable-layer immediately interior to the at least one conductive cable-layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A lead comprising:
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an extended exterior insulating body having a lumen; and a cable disposed within said lumen, said cable comprising; a conductive central core; and at least one conductive cable-layer concentric with the central core and surrounding at least one of the conductive central core and a conductive cable-layer interior to itself; wherein; each at least one conductive cable-layer is comprised of a plurality of conductive filaments, said filaments configured to provide an elongated contact area between the at least one conductive cable-layer and either the conductive central core or a second conductive cable-layer immediately interior to the at least one conductive cable-layer. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An implantable system for delivery of cardiac therapy comprising:
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an implantable cardiac therapy device (ICTD); and a lead configured to be connected at a proximal end to said ICTD and configured to be attached at a distal end to a tissue of a patient; wherein said lead comprises; an extended exterior insulating body having a lumen; and a cable situated within said lumen, said cable comprising; a conductive central core; and at least one conductive cable-layer concentric with the central core and surrounding at least one of the conductive central core and a conductive cable-layer interior to itself; wherein; each at least one conductive cable-layer is comprised of a plurality of conductive filaments, said filaments configured to provide an elongated contact area between the at least one conductive cable-layer and either the conductive central core or a second conductive cable-layer immediately interior to the at least one conductive cable-layer.
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17. A cable, comprising:
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a conductive central core; at least one conductive cable-layer concentric with the central core and surrounding at least one of the conductive central core and a conductive cable-layer interior to itself; and a plurality of conductive filaments of the at least one conductive cable-layer; wherein; the cross sectional area of a filament of the plurality of conductive filaments progressively decreases with an increasing radial distance from the conductive central core, wherein; the conductive central core has a cross sectional area which is greater than a cross-sectional area of a filament in the cable-layers; and each filament of a first cable-layer of the at least one conductive cable-layers has a cross-sectional area which is greater than a cross-sectional area of a filament of a cable-layer exterior to the first cable-layer; and; the material composition of a filament progressively changes with an increasing radial distance from the conductive central core, the material composition determining a material strength of the filament, wherein; the conductive central core has a material strength which is greater than a material strength of a filament in the cable-layers; and each filament of a first cable-layer of the one or more cable-layers has a material strength which is greater than a material strength of a filament of a cable-layer exterior to the first cable-layer. - View Dependent Claims (18, 19, 20, 21)
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Specification