Dynamic coil for implantable stimulation leads
AssigneeNuvectra Corporation
InventorsSHAHN S. SAGE, Tom Walch, Martin T. Steele, John Swoyer
Life of this patent
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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.
Claims20
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;
- 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 being coiled around the mandrel forms a coiled configuration but the conductor structure has substantially no memory of the 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 are not secured are free to expand to an inside surface of the outer tubular structure;
- 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.
A method of making a therapy delivery element configured for at least partial insertion in a living body, the method comprising the steps of:
- positioning an inner tubular structure within an outer tubular structure such that a gap exists there between;
- forming a dynamic coil comprising a plurality of insulated conductors retained in a coiled configuration generally at or below a yield point of the insulated conductor;
- locating the dynamic coil in the gap;
- securing the insulated conductors in the coiled configuration by at least one mechanical restraint located at each of a distal end and a proximal end of the inner tubular structure or the outer tubular structure;
- permitting the dynamic coil to expand within the gap to engage an inner surface of the outer tubular structure in an expanded coiled configuration;
- and
- permitting free ends of the insulated conductors to extend beyond distal ends and proximal ends of the inner and outer tubular structures.
Dependencies are inferred from the claim text.