High impedance electrode tip with internal drug delivery capability
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United States of America Patent
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Oct 2, 2001
Grant Date -
N/A
app pub date -
Mar 29, 1999
filing date -
Mar 29, 1999
priority date (Note) -
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Abstract
An implantable lead, being either a fixed or retractable/extendable lead, having a distal tip electrode is adapted for implantation on or about the heart and for connection to a system for monitoring or stimulating cardiac activity. The electrode includes a mechanical fastener such as a fixation helix for securing the electrode to cardiac tissue, which may or may not be electrically active. The implantable electrode with a helical tip may comprise: an electrode having a distal end and a proximal end; and a helix disposed within the electrode, which helix is aligned along a radial axis of the electrode to the distal end; and the implantable electrode having at least one feature selected from the group consisting of: a) the helix having a coating of an insulating material on its surface, b) the helix having its surface beyond the distal end of the electrode and the distal end of the electrode having a porous conductive surface at a base of the helix, c) a porous conductive element, screen or mesh at a base of the helix, and d) a porous conductive element at the end of the electrode having an insulating coating covering from 5-95% of the surface of the porous conductive element. The electrode may further include an electrode tip having a porous electrical conductive element, such as a mesh screen, disposed on a surface at the distal end of the electrode tip, which can be used as a sensing or pacing interface with the cardiac tissue. The porous electrically conductive element will usually be positioned at the base of the helix (when extended if extendable/retractable). The mesh or screen may provide a guiding mechanism for the helix as it travels out of the electrode for securing the electrode to the heart or other muscle or organ. The guiding mechanism may include a groove within the mesh screen. Alternatively, the guiding mechanism includes a guiding bar on which the fixation helix rides on during extension or retraction. In combination with each of these high impedance tips, a drug delivery system is provided at least the majority of which drug delivery system is provided from a source within a volume which is within the structural walls of the lead and/or within a volume having its major dimensions and/or at least 50% of its volume generally within the projected area of the tip.
First Claim
Family
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- CARDIAC PACEMAKERS, INC.
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Bartig, Jeffrey T | Maplewood, MN | 17 | 861 |
Peterfeso, Randall M | St. Paul, MN | 13 | 998 |
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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