Medical electrical lead employing improved penetrating electrode
First Claim
1. A medical electrical lead comprising:
- an elongated insulative lead body having a proximal end and a distal end;
an elongated conductor having a proximal end and a distal end and mounted within said insulative lead body; and
an electrode assembly having a proximal end and a distal end and having a drug release means located within said electrode assembly for release of a therapeutic drug, said electrode assembly further comprising fixation means extending from said electrode assembly for holding said electrode assembly adjacent body tissue, an outer surface of said fixation means provided with an elongated groove, a proximal end of said groove exposed to said drug release means a distal end of said groove extending from the distal end of said electrode assembly whereby when said fixation means is inserted into said body tissue, said elongated groove in conjunction with said body tissue define a passage along which said drug released by said drug release means may pass, and thereby pass into said body tissue, said electrode assembly further comprising a conductive electrode surface electrically coupled to the distal end of said elongated conductor.
1 Assignment
0 Petitions
Accused Products
Abstract
A cardiac pacing lead or other stimulation lead carrying a drug compounded into a matrix, located within the distal portion of the lead. The drug is delivered to the tissue adjacent the distal end of the lead. In connection with the polymer matrix, the lead is provided with a penetrating electrode, which takes the form of a sharpened helix. The electrode is provided with a groove, running the length of the electrode and exposed to the matrix. In use, the drug elutes out of the matrix, through the groove in the electrode, and into the tissue to be stimulated. The drug may be an antiinflammatory agent, such as a glucocorticosteroid, to minimize the effects of implantation of the electrode into the tissue to be stimulated.
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Citations
7 Claims
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1. A medical electrical lead comprising:
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an elongated insulative lead body having a proximal end and a distal end; an elongated conductor having a proximal end and a distal end and mounted within said insulative lead body; and an electrode assembly having a proximal end and a distal end and having a drug release means located within said electrode assembly for release of a therapeutic drug, said electrode assembly further comprising fixation means extending from said electrode assembly for holding said electrode assembly adjacent body tissue, an outer surface of said fixation means provided with an elongated groove, a proximal end of said groove exposed to said drug release means a distal end of said groove extending from the distal end of said electrode assembly whereby when said fixation means is inserted into said body tissue, said elongated groove in conjunction with said body tissue define a passage along which said drug released by said drug release means may pass, and thereby pass into said body tissue, said electrode assembly further comprising a conductive electrode surface electrically coupled to the distal end of said elongated conductor. - View Dependent Claims (2, 3)
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4. A medical electrical lead comprising:
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an elongated insulative lead body having a proximal end and a distal end; an elongated conductor having a proximal end and a distal end and mounted within said insulative lead body; and an electrode assembly having proximal end and a distal end and having a drug release means located within said electrode assembly for release of a therapeutic drug, said electrode assembly further comprising fixation means extending from said electrode assembly for holding said electrode assembly adjacent body tissue, said fixation means provided with an elongated groove, a proximal end of said groove exposed to said drug release means, a distal end of said groove extending from the distal end of said electrode assembly whereby when said fixation means is inserted into said body tissue, said elongated groove in conjunction with said body tissue defines a passage along which said drug released by said drug release means may pass, and thereby pass into body tissue, said electrode assembly further comprising a conductive electrode surface electrically coupled to the distal end of said elongated conductor and wherein said fixation means comprises a fixation helix which may be advanced out of the distal end of said electrode assembly or retracted into the distal end of said electrode assembly, said lead further comprising means for advancing and retracting said fixation helix. - View Dependent Claims (5, 6, 7)
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Specification