Implantable stimulation lead having an advanceable therapeutic drug delivery system
First Claim
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1. An implantable pacing lead for use with a cardiac pacemaker, said pacing lead comprising:
- an electrical conductor having a proximal end and a distal end;
an insulation sheath encasing said electrical conductor;
an electrical connector affixed to said proximal end of said conductor;
an active fixation electrode assembly affixed to said distal end of said conductor, said electrode assembly having a helical electrode capable of axial advancement outward relative to said distal end for penetrating into myocardial tissue; and
therapeutic delivery means for delivering a therapeutic compound, axially advanceable outward relative to said distal end along an axis of the helical electrode simultaneously with the advancing of said active fixation electrode assembly, said therapeutic delivery means comprising intrahelix means for penetrating myocardial tissue at a center of the helical electrode.
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Abstract
A pacing lead having a stylet introduced anti-inflammatory drug delivery element advanceable from the distal tip electrode. The element is preferably formed as a moldable biocompatible composite material. The element has a biocompatible matrix material which may be combined with drugs and therapeutic agents to deliver the drugs and agents by co-dissolution or diffusion to the point of either passive or active fixation. The drug delivery element may be rigid and serve to center the means, preferably a helix, for active fixation of the lead in the myocardium.
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Citations
28 Claims
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1. An implantable pacing lead for use with a cardiac pacemaker, said pacing lead comprising:
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an electrical conductor having a proximal end and a distal end; an insulation sheath encasing said electrical conductor; an electrical connector affixed to said proximal end of said conductor; an active fixation electrode assembly affixed to said distal end of said conductor, said electrode assembly having a helical electrode capable of axial advancement outward relative to said distal end for penetrating into myocardial tissue; and therapeutic delivery means for delivering a therapeutic compound, axially advanceable outward relative to said distal end along an axis of the helical electrode simultaneously with the advancing of said active fixation electrode assembly, said therapeutic delivery means comprising intrahelix means for penetrating myocardial tissue at a center of the helical electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification