Atraumatic screw-in lead

Details Atraumatic screw-in lead Atraumatic screw-in lead

A - Human Necessities

61

N

326/17.5

A61N 1/05 (2006.01) A61N 1/02 (2006.01) A61N 1/372 (2006.01)

Patent

CA 2023824

ATRAUMATIC SCREW-IN LEAD ABSTRACT An electrical stimulation lead incorporating an electrode assembly which dispenses a drug adjacent the stimulation site. The lead is provided with a fixation helix located at the distal end of the lead. An electrode may be extended distally within the helix. When extended, the electrode serves as a guard against perforation or other damage to tissue by the helix. In its retracted position, the electrode is located roughly adjacent the distal end of the lead body, and lies against the tissue to be stimulated. Advancing and retraction of the electrode is accomplished by means of a stylet which is removably engageable with the proximal end of the electrode. In one embodiment, the stylet functions to both advance and retract the electrode. In an alternative embodiment, the stylet is used only to advance the electrode, and retraction of the electrode is accomplished by a resilient conductor.

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