US4817634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epicardial patch electrode
Assignee: Medtronic Inc
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Filing: 1987-06-18
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Granted: 1989-04-04
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Expires: 2007-06-18
Abstract
Abstract An epicardial defibrillation electrode employing an elongated, coil electrode embedded in the surface of a flexible electrode pad. The coil electrode provides increased flexibility and superior electrode flex life. The arrangement of the coil electrode provides uniform current distribution. The electrode takes the form of a space wound coil following a tortuous path over the surface of the electrode pad to provide a large surface area to reduce current density. In some embodiments, an insulative core is located within the lumen of the coil.
Inventors
- 👤 Timothy W. Holleman
- 👤 Richard Sandstrom
- 👤 Roger Rugland
- 👤 Terrell M. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:18
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/0587
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
112 words
An epicardial defibrillation electrode for a long term implant, comprising: a generally planar flexible insulative base pad having a periphery which generally takes the form of a convex, closed curve, said base pad having an upper and a lower face, and having molded into the lower face thereof at least one elongated convoluted groove; at least one elongated space wound electrode coil, mounted longitudinally within said groove in said lower face of said base pad, said electrode coil having a diameter greater than the depth of said groove in said lower face of said base pad; and an insulated, elongated conductor, coupled to said electrode coil and extending from said base pad.
Claim 2
Dependent Claim
112 words
An epicardial defibrillation electrode for a long term implant, comprising: a generally planar flexible insulative base pad having a periphery which generally takes the form of a convex, closed curve, said base pad having an upper and a lower face, and having molded into the lower face thereof at least one elongated convoluted groove; at least one elongated space wound electrode coil, mounted longitudinally within said groove in said lower face of said base pad, said electrode coil having a diameter greater than the depth of said groove in said lower face of said base pad; and an insulated, elongated conductor, coupled to said electrode coil and extending from said base pad.
Claim 3
Dependent Claim
31 words
An electrode according to claim 1 wherein said electrode further comprises a cylindrical core of flexible, insulative material located within said electrode coil, and running the length of said electrode coil.
Claim 4
Dependent Claim
32 words
A lead according to claim 2 wherein said elongated core is adhesively coupled to said flexible base pad, whereby said electrode coil is retained within said groove of said flexible base pad.
Claim 5
Dependent Claim
29 words
An electrode according to claim 1 wherein said elongated conductor extends from the base portion of said flexible base pad, generally in the plane of said flexible base pad.
Claim 6
Dependent Claim
32 words
An electrode according to claim 1 wherein said electrode coil has first and second ends, and wherein both said first and second ends are mechanically and electrically coupled to said elongated conductor.
Claim 7
Dependent Claim
56 words
An electrode according to claim 1 wherein said base pad has a plurality of elongated curved grooves molded therein and wherein said electrode has a plurality of electrode coils mounted longitudinally within said plurality of elongated grooves in said base pad, wherein all of said plurality of electrode coils are coupled to said insulated elongated conductor.
Claim 8
Dependent Claim
37 words
An electrode according to claim 6 wherein said plurality of elongated curved grooves in said base pad take the form of closed curves and wherein said plurality of electrode coils also take the form of closed curves.
Claim 9
Dependent Claim
28 words
An electrode according to claim 1 wherein said at least one electrode coil is mounted within said elongated curved groove of said base pad by means of adhesive.
Claim 10
Dependent Claim
96 words
An epicardial defibrillation electrode for permanent implantation, comprising: a flexible insulative base pad having an upper face and a lower face; an elongated space wound electrode coil, comprising individual coils, mounted within said base pad, said electrode coil mounted within said base pad such that portions of the individual coils of said electrode coil extend downward from said lower face of said base pad, said electrode coil extending along said lower face of said base pad along an elongated convoluted path; and an elongated conductor coupled to said electrode coil and extending from said base pad.
Claim 11
Dependent Claim
96 words
An epicardial defibrillation electrode for permanent implantation, comprising: a flexible insulative base pad having an upper face and a lower face; an elongated space wound electrode coil, comprising individual coils, mounted within said base pad, said electrode coil mounted within said base pad such that portions of the individual coils of said electrode coil extend downward from said lower face of said base pad, said electrode coil extending along said lower face of said base pad along an elongated convoluted path; and an elongated conductor coupled to said electrode coil and extending from said base pad.
Claim 12
Dependent Claim
14 words
A lead according to claim 9 wherein said electrode coil comprises a multifilar coil.
Claim 13
Dependent Claim
36 words
A lead according to claim 9 or claim 7 wherein the individual coils of said electrode coil project from said base pad a distance of approximately one-third to one-half of the diameter of said electrode coil.
Claim 14
Dependent Claim
130 words
An epicardial lead, comprising: a flexible insulative base pad having an upper face and a lower face, said base pad having an elongated groove molded into the lower face of said base pad; a space wound electrode coil, located in said groove in said lower face of said base pad, said electrode coil having a diameter greater than the depth of said groove in said lower face of said base pad; a flexible elongated insulative core located within said electrode coil, running the length of said electrode coil; adhesive means for attaching said core to said base pad, whereby said electrode coil is retained within said groove in said lower face of said base pad; and an elongated conductor coupled to said electrode coil and extending from said base pad.
Claim 15
Dependent Claim
130 words
An epicardial lead, comprising: a flexible insulative base pad having an upper face and a lower face, said base pad having an elongated groove molded into the lower face of said base pad; a space wound electrode coil, located in said groove in said lower face of said base pad, said electrode coil having a diameter greater than the depth of said groove in said lower face of said base pad; a flexible elongated insulative core located within said electrode coil, running the length of said electrode coil; adhesive means for attaching said core to said base pad, whereby said electrode coil is retained within said groove in said lower face of said base pad; and an elongated conductor coupled to said electrode coil and extending from said base pad.
Claim 16
Dependent Claim
27 words
An electrode according to claim 1 or claim 9 or claim 12 wherein said electrode coil has a diameter greater than the thickness of said base pad.
Claim 17
Dependent Claim
14 words
An electrode according to claim 13 wherein said electrode coil comprises a multifilar coil.
Claim 18
Dependent Claim
111 words
An epicardial defibrillation electrode for long term implant comprising: a generally planar flexible insulative base pad having a periphery taking the general form of a closed, convex curve, said base pad having an upper and a lower face and having molded into the lower face thereof a plurality of elongated grooves; a plurality of elongated space wound electrode coils, mounted longitudinally within said plurality of elongated grooves in said lower face of said base pad, said electrode coils having diameters greater than the depth of said grooves in said lower face of said base pad; and an insulated, elongated conductor, coupled to said electrode coils and extending from said base pad.
Claim 19
Dependent Claim
111 words
An epicardial defibrillation electrode for long term implant comprising: a generally planar flexible insulative base pad having a periphery taking the general form of a closed, convex curve, said base pad having an upper and a lower face and having molded into the lower face thereof a plurality of elongated grooves; a plurality of elongated space wound electrode coils, mounted longitudinally within said plurality of elongated grooves in said lower face of said base pad, said electrode coils having diameters greater than the depth of said grooves in said lower face of said base pad; and an insulated, elongated conductor, coupled to said electrode coils and extending from said base pad.
Claim 20
Dependent Claim
22 words
An electrode according to claim 15 wherein said base pad is fabricated of silicone rubber, and has a thickness of about 0.025".
Claim 21
Dependent Claim
44 words
An electrode according to claim 15 wherein said plurality of elongated grooves of said base pad take the form of closed curves and wherein said plurality of electrode coils mounted within said grooves of said base pad also take the form of closed curves.
Claim 22
Dependent Claim
28 words
An electrode according to claim 15 provided with a reinforcing mesh of Dacron, embedded within said base pad and limited to the external periphery of said base pad.
Claim 23
Dependent Claim
30 words
An electrode according to claim 15 or claim 16 or claim 17 or claim 18 wherein said electrode coils have a diameter greater than the thickness of said base pad.
Claim 24
Dependent Claim
13 words
An electrode according to claim 19 wherein said electrode coils are multifilar coils.
References Cited (Backward Citations)
US3253595A
Cited
US3244174A
Cited
US3367339A
Cited
US3474791A
Cited
US3572344A
Cited
US3942536A
Cited
US3942536B1
Cited
US3788329A
Cited
US4030509A
Cited
US4161952A
Cited
US4291707A
Cited
US4641656A
Cited
EP0211166A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |