US5020544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low energy defibrillation electrode
Assignee: Cardiac Pacemakers Inc
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Filing: 1989-11-01
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Granted: 1991-06-04
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Expires: 2009-11-01
Abstract
Abstract An implantable cardiac electrode for use in defibrillation. The electrode comprises a plurality of layers of porous conductive screens and backed by an insulation layer. When implanted on or about the heart surface, body fluids can flow through the screens thus increasing the effective surface area of contact. Each individual layer of mesh can be microscopically textured to create indentations on the layer for further increasing the surface area of each screen, and thus, the surface area of body fluid contact. Also disclosed is an electrode without an insulative backing facing away from the heart.
Inventors
- 👤 Roger W. Dahl
- 👤 Ronald W. Heil, Jr.
- 👤 Graydon E. Beatty
- 👤 Morton M. Mower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:27
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/0587
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
98 words
A defibrillation electrode of the type for implantation on or about the heart of a patient for connection to an implantable electrical defibrillation system, said electrode comprising: a conductive discharge volume region comprising at least two layers of porous electrically conductive screen, said at least two layers of porous electrically conductive screen substantially filling said conductive discharge volume region but allowing the flow of body fluids therethrough for making intimate electrical contact with the body fluids; an insulation element attached to said layers of conductive screen for occupying a surface of said electrode facing away from the heart.
Claim 2
Dependent Claim
98 words
A defibrillation electrode of the type for implantation on or about the heart of a patient for connection to an implantable electrical defibrillation system, said electrode comprising: a conductive discharge volume region comprising at least two layers of porous electrically conductive screen, said at least two layers of porous electrically conductive screen substantially filling said conductive discharge volume region but allowing the flow of body fluids therethrough for making intimate electrical contact with the body fluids; an insulation element attached to said layers of conductive screen for occupying a surface of said electrode facing away from the heart.
Claim 3
Dependent Claim
16 words
The electrode of claim 1, wherein each of said conductive screens is formed of titanium mesh.
Claim 4
Dependent Claim
16 words
The electrode of claim 1, wherein each of said conductive screens is formed of platinum mesh.
Claim 5
Dependent Claim
17 words
The electrode of claim 1, wherein each of said conductive screens is defined by bundles of wires.
Claim 6
Dependent Claim
17 words
The electrode of claim 1, wherein each of said conductive screens is defined by woven conductive filaments.
Claim 7
Dependent Claim
17 words
The electrode of claim 1, wherein each of said conductive screens is defined by coiled conductive filaments.
Claim 8
Dependent Claim
14 words
The electrode of claim 1, wherein said insulation element is formed of silicone material.
Claim 9
Dependent Claim
25 words
The electrode of claim 1, wherein at least one of said conductive screens is microscopically textured for increasing the surface area of the conductive screen.
Claim 10
Dependent Claim
35 words
The electrode of claim 1, and further including a polymeric material incorporated in the porous conductive screens of said electrode for preventing tissue in-growth in said conductive discharge volume region of said electrode after implantation.
Claim 11
Dependent Claim
13 words
The electrode of claim 9, wherein said polymeric material is a hydrogel material.
Claim 12
Dependent Claim
20 words
The electrode of claim 10, and further comprising an antibiotic agent incorporated in the hydrogel material for treating device infection.
Claim 13
Dependent Claim
20 words
The electrode of claim 10, and further comprising an antiarrhythmic agent incorporated in the hydrogel material for treating device infection.
Claim 14
Dependent Claim
20 words
The electrode of claim 9, and further comprising an antibiotic agent incorporated in the polymeric material for treating device infection.
Claim 15
Dependent Claim
16 words
The electrode of claim 9, and further comprising an antiarrhythmic agent incorporated in said polymeric material.
Claim 16
Dependent Claim
19 words
The electrode of claim 1, and further comprising an antibiotic agent incorporated in the insulation element for treating infection.
Claim 17
Dependent Claim
102 words
A defibrillation electrode of the type for implantation on or about the heart of a patient for connection to an electrical defibrillation system, said electrode comprising: a conductive discharge volume region comprising at least two layers of porous electrically conductive screen, said at least two layers of porous electrically conductive screen filling said conductive discharge volume region entirely but allowing the flow of body fluids therethrough for making intimate electrical contact with the body fluids; and said at least two layers being disposed substantially parallel to each other and substantially parallel to a reference plane passing through said conductive discharge volume region.
Claim 18
Dependent Claim
102 words
A defibrillation electrode of the type for implantation on or about the heart of a patient for connection to an electrical defibrillation system, said electrode comprising: a conductive discharge volume region comprising at least two layers of porous electrically conductive screen, said at least two layers of porous electrically conductive screen filling said conductive discharge volume region entirely but allowing the flow of body fluids therethrough for making intimate electrical contact with the body fluids; and said at least two layers being disposed substantially parallel to each other and substantially parallel to a reference plane passing through said conductive discharge volume region.
Claim 19
Dependent Claim
16 words
The electrode of claim 16, wherein each of said conductive screens is formed of titanium mesh.
Claim 20
Dependent Claim
16 words
The electrode of claim 16, wherein each of said conductive screens is formed of platinum mesh.
Claim 21
Dependent Claim
17 words
The electrode of claim 16, wherein each of said conductive screens is defined by bundles of wires.
Claim 22
Dependent Claim
17 words
The electrode of claim 16, wherein each of said conductive screens is defined by woven conductive filaments.
Claim 23
Dependent Claim
17 words
The electrode of claim 16, wherein each of said conductive screens is defined by coiled conductive filaments.
Claim 24
Dependent Claim
25 words
The electrode of claim 16, wherein at least one of said conductive screens is microscopically textured for increasing the surface area of the conductive screen.
Claim 25
Dependent Claim
35 words
The electrode of claim 16, and further including a polymeric material incorporated in the porous conductive screens of said electrode for preventing tissue in-growth in said conductive discharge volume region of said electrode after implantation.
Claim 26
Dependent Claim
13 words
The electrode of claim 23, wherein said polymeric material is a hydrogel material.
Claim 27
Dependent Claim
20 words
The electrode of claim 24, and further comprising an antibiotic agent incorporated in the hydrogel material for treating device infection.
Claim 28
Dependent Claim
20 words
The electrode of claim 24, and further comprising an antiarrhythmic agent incorporated in the hydrogel material for treating device infection.
Claim 29
Dependent Claim
26 words
The electrode of claim 23, and further comprising an antibiotic agent incorporated in said conductive screens by means of said polymeric material for treating device infection.
Claim 30
Dependent Claim
16 words
The electrode of claims 23, and further comprising an antiarrhythmic agent incorporated in the polymeric material.
Claim 31
Dependent Claim
112 words
An electrode of the type for implantation on or about the heart of a patient for connection to an electrical defibrillation system, said electrode comprising: a conductive discharge volume region comprising at least two layers of porous electrically conductive screen, said at least two layers of porous electrically conductive screen filling said conductive discharge volume region entirely but allowing the flow of body fluids therethrough for making intimate electrical contact with the body fluids, said discharge volume region having a first conductive surface facing towards the heart and a second conductive surface facing away from the heart, both of said conductive surfaces for being exposed to body tissue without being insulated therefrom.
Claim 32
Dependent Claim
112 words
An electrode of the type for implantation on or about the heart of a patient for connection to an electrical defibrillation system, said electrode comprising: a conductive discharge volume region comprising at least two layers of porous electrically conductive screen, said at least two layers of porous electrically conductive screen filling said conductive discharge volume region entirely but allowing the flow of body fluids therethrough for making intimate electrical contact with the body fluids, said discharge volume region having a first conductive surface facing towards the heart and a second conductive surface facing away from the heart, both of said conductive surfaces for being exposed to body tissue without being insulated therefrom.
Claim 33
Dependent Claim
13 words
The electrode of claim 29, wherein said electrically conductive screen is titanium mesh.
Claim 34
Dependent Claim
13 words
The electrode of claim 29, wherein said electrically conductive screen is platinum mesh.
Claim 35
Dependent Claim
15 words
The electrode of claim 29, wherein said electrically conductive screen is a bundle of wires.
Claim 36
Dependent Claim
14 words
The electrode of claim 29, wherein said electrically conductive screen is woven conductive filaments.
Claim 37
Dependent Claim
14 words
The electrode of claim 29, wherein said electrically conductive screen is coil conductive filaments.
Claim 38
Dependent Claim
25 words
The electrode of claim 29, and further comprising a polymeric material incorporated in said conductive screen and an antiarrhythmic agent incorporated in said polymeric material.
Claim 39
Dependent Claim
13 words
The electrode of claim 35, wherein said polymeric material is a hydrogel material.
Claim 40
Dependent Claim
25 words
The electrode of claim 29, and further comprising a polymeric material incorporated in said conductive screen and an antibiotic agent incorporated in said polymeric material.
Claim 41
Dependent Claim
13 words
The electrode of claim 37, wherein said polymeric material is a hydrogel material.
References Cited (Backward Citations)
US2985172A
Cited
US4291707A
Cited
US4711251A
Cited
US4711251B1
Cited
EP0057451A1
Cited
US4765341A
Cited
US4444206A
Cited
US4548203A
Cited
US4567900A
Cited
GB2182566A
Cited
US4827932A
Cited
US4817634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |