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US 2009/0157156 A1Published application
Fixation helix and multipolar medical electrode
AssigneeCardiac Pacemakers, Inc.
InventorArthur J. FOSTER
Life of this patent
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Abstract
A cardiac rhythm management device that includes a lead and a pulse generator. The lead can comprise a lead body, a helical composite electrode, a composite conductor and a proximal connector. The helical composite electrode can have first and second electrodes in a co-axial configuration. The composite connector can electrically connect the first and second electrodes to the proximal connector. The proximal connector can be configured to couple to the pulse generator.
Claims20
A medical electrical lead comprising:
- an insulative lead body including a proximal portion and a distal portion;
- a proximal connector disposed on the proximal portion of the lead body, the connector configured to couple the lead to an implantable medical device, the connector having a rotatable portion that is rotatable with respect to the lead body;
- a composite helical electrode including a first generally tubular electrode having a first distal end portion, a second electrode disposed at least partially within the first electrode and having a second distal end portion, the first and second distal end portions longitudinally spaced from one another, and an insulating layer disposed between the first and second electrodes, the insulating layer extending distally of the first electrode and terminating between the first and second distal end portions;
- a first conductor providing an electrical pathway between the rotatable portion of the proximal connector and the first electrode and a second conductor providing an electrical pathway between the rotatable portion of the proximal connector and the second electrode;
- and
- a jack screw disposed in the lead body, a proximal portion of the jack screw coupled to the conductors and a distal portion of the jack screw coupled to the composite electrode, the jack screw having first threads disposed on the outer surface thereof configured to mechanically interact with second threads on the inner surface of the lead body to convert rotational motion of the jack screw into linear motion of the jack screw such that rotating the rotatable portion of the proximal connector results in both rotational and linear motion of the composite electrode.
3 more elements
A medical electrical lead comprising:
- an insulative lead body having a distal end and a proximal end and an inner surface defining a lumen extending between the distal and proximal ends;
- a proximal connector configured to couple the lead to an implantable medical device, a rotatable portion of the connector rotatable with respect to the lead body;
- first and second conductors coupled to the rotatable portion and extending distally from the rotatable portion through the lumen;
- a composite helical multipolar electrode electrically coupled to the first and second conductors;
- an actuation member disposed in the lumen and coupled to the composite electrode and the first and second conductors, the outer surface of the actuation member configured to mechanically interact with an inner surface of the lead body such that rotating the rotatable portion of the proximal connector results in both rotational and linear motion of the composite electrode.
2 more elements
A method of implanting a lead at a desired location in a patient comprising:
- providing a lead having an insulative lead body, a proximal connector with a rotatable portion that is rotatable with respect to the lead body, a composite multipolar helical electrode disposed on a distal portion of the lead body, the composite electrode electrically and mechanically coupled to the rotatable portion, and an actuation member disposed between the rotatable portion and the composite electrode, an outer surface of the actuation member mechanically interacting with an inner surface of the lead body to convert rotational motion of the rotatable portion into both linear and rotational motion of the composite electrode;
- rotating the rotatable portion of the proximal connector with respect to the lead body to extend the composite electrode from the lead body and implant the lead at the desired location within the patient.
Dependencies are inferred from the claim text.