Surgery – Truss – Pad
Patent
1989-08-23
1990-11-27
Cohen, Lee S.
Surgery
Truss
Pad
128419P, A61N 100
Patent
active
049728482
ABSTRACT:
A cardiac pacing lead or other stimulation lead carrying a steroid compounded within a polymer matrix. The steroid is dispersed in thermoplastic or thermoset polyurethane or polyurea forming monomers or prepolymers. The mixture is then chain extended by addition of the appropriate difunctional or multifunctional isocyanate, hydroxyl or amine curing agent to form a solid polymer. The resulting formulation is molded or cast into a desired shape, and incorporated in the distal end of a medical electrical lead, adjacent to or within the electrode. In a preferred embodiment, the medical lead employs an extendable helix which is screwed into body tissue, and the polymer containing the drug takes the form of a generally dimensionally stable annular member mounted to the lead, encircling the helix.
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Coury Arthur J.
Di Domenico Edward D.
Doan Phong D.
Hobot Christopher M.
Sandstrom Richard D.
Cohen Lee S.
Duthler Reed A.
Getzow Scott
Medtronic Inc.
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