Manufacturing method of a dynamic coil for implantable stimulation leads
AssigneeNuvectra Corporation
InventorsShahn S. Sage, Tom Walch, Martin T. Steele, Sr., John Swoyer
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Abstract
A method of making a therapy delivery element configured for at least partial insertion in a living body is disclosed. A conductor structure is coiled around a mandrel. A segment of the conductor structure is secured to the mandrel. After this, an outer tubular structure is positioned around the conductor structure. Portions of the conductor structure that are not secured are free to expand to an inside surface of the outer tubular structure. A lumen is formed by removing at least a portion of the mandrel.
Claims13
A method of making a therapy delivery element configured for at least partial insertion in a living body, the method comprising the steps of:
- coiling a conductor structure around a mandrel, wherein the conductor structure includes a plurality of conductors, and wherein each conductor of the plurality of conductors contains:
- an insulator and a plurality of wires located inside the insulator, wherein the plurality of wires inside the insulator include a first wire and a plurality of second wires that surround the first wire, and wherein the first wire has a greater breaking strength than each of the second wires;
- securing a segment of the conductor structure to the mandrel;
- positioning, after the securing, an outer tubular structure around the conductor structure, wherein portions of the conductor structure that are not secured are free to expand to an inside surface of the outer tubular structure;
- and
- forming a lumen by removing at least a portion of the mandrel.
A method of making a therapy delivery element configured for at least partial insertion in a living body, the method comprising the steps of:
- coiling a conductor structure around a mandrel, wherein the coiling is performed such that:
- a stress on the conductor structure during the coiling is at or below a yield point of the conductor structure;
- and
- the conductor structure loosely wraps around the mandrel and has substantially no memory of a coiled configuration;
- securing a segment of the conductor structure to the mandrel, wherein portions of the conductor structure that are not secured are free to shift relative to the mandrel;
- positioning, after the securing, an outer tubular structure around the conductor structure, wherein portions of the conductor structure that gaps are not secured are free to expand to an inside surface of the outer tubular structure such that gaps are formed between the conductor structure and the mandrel;
- forming a lumen by removing at least a portion of the mandrel;
- and
- releasing a free end of the conductor structure such that the free end of the conductor structure expands beyond the outer tubular structure.
Dependencies are inferred from the claim text.