US4573480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implantable electrode lead with microporous insulation
Assignee: Pacesetter AB
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Filing: 1983-12-19
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Granted: 1986-03-04
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Expires: 2003-12-19
Abstract
Abstract Electrode configuration for use in medical applications, in particular for implantable cardiac pacemakers, includes a porous synthetic material, in particular porous polyfluoroethylene which is used as insulation for the wiring associated with the electrode. The pore size should be 4 μm or less. It is preferable to sinter the surface to a non-porous, smooth layer.
Inventors
- 👤 Jakub Hirschberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61F; A61F2250/00; A61F2250/0014; A61F2250/0023; A61F2250/0024; Y; Y10; Y10S; Y10S128/00; Y10S128/14
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
92 words
An implantable electrode lead of the type having an electrode tip for coupling an electrical stimulator with body tissue to be stimulated through the electrode tip, the implantable electrode lead comprising: a generally helically wound electrical conductor; at least one flexible, cylindrical insulating sleeve for coaxially encapsulating the electrical conductor to provide an insulator; and the insulating sleeve comprises a porous synthetic material that is polytetrafluoroethylene having a predetermined pore size that makes the insulating sleeve highly flexible and bendable while being essentially impervious to body fluids to prevent tissue growth thereon.
Claim 2
Dependent Claim
92 words
An implantable electrode lead of the type having an electrode tip for coupling an electrical stimulator with body tissue to be stimulated through the electrode tip, the implantable electrode lead comprising: a generally helically wound electrical conductor; at least one flexible, cylindrical insulating sleeve for coaxially encapsulating the electrical conductor to provide an insulator; and the insulating sleeve comprises a porous synthetic material that is polytetrafluoroethylene having a predetermined pore size that makes the insulating sleeve highly flexible and bendable while being essentially impervious to body fluids to prevent tissue growth thereon.
Claim 3
Dependent Claim
20 words
An implantable electrode according to claim 1, wherein the pore size of said insulation is not larger than 4 μm.
Claim 4
Dependent Claim
29 words
An implantable electrode according to claim 2, wherein said porous synthetic material on the outside of the said insulation is at least partially covered with a smooth impervious layer.
Claim 5
Dependent Claim
35 words
An implantable electrode according to claim 1, wherein said insulator comprises layers of varying porosity, with the pore size in at least one layer being so small that the layer is impervious to body fluids.
Claim 6
Dependent Claim
29 words
An implantable electrode according to claim 1, wherein said porous synthetic material on the outside of said insulator is at least partially covered with a smooth and impervious layer.
Claim 7
Dependent Claim
26 words
An implantable electrode according to claim 5, wherein said smooth layer is formed out of the outer portion of said porous synthetic material by heating same.
Claim 8
Dependent Claim
22 words
An implantable electrode according to claim 1, wherein said insulator is of varying porosity in its outer section along said electrode configuration.
Claim 9
Dependent Claim
25 words
An implantable electrode according to claim 7, wherein said smooth layer is formed out of the outer portion of said porous synthetic material by sintering.
Claim 10
Dependent Claim
31 words
An implantable electrode according to claim 8, wherein said additional synthetic material includes portions that project away from said insulation in such a manner as to form a means of anchoring.
Claim 11
Dependent Claim
21 words
An implantable electrode according to clam 1, further comprising additional synthetic material with a larger pore size applied to said insulation.
Claim 12
Dependent Claim
21 words
An implantable electrode according to clam 1, further comprising additional synthetic material with a larger pore size applied to said insulation.
Claim 13
Dependent Claim
20 words
An implantable electrode according to claim 10, wherein said additional synthetic material is applied in the form of a ring.
Claim 14
Dependent Claim
35 words
Electrode configuration according to claim 11, wherein said additional synthetic material at least in some cases forms areas that project away from said insulation in such a manner as to form a means of anchoring.
Claim 15
Dependent Claim
36 words
An implantable electrode according to claim 10, wherein said additional synthetic material at least in some cases has portions that project away from said insulation in such a manner as to form a means of anchoring.
Claim 16
Dependent Claim
35 words
Electrode configuration according to claim 13, wherein said additional synthetic material at least in some cases forms areas that project away from said insulation in such a manner as to form a means of anchoring.
References Cited (Backward Citations)
US3035583A
Cited
US4033355A
Cited
US4082893A
Cited
US4269198A
Cited
US4301815A
Cited
US4407303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-03 | 1989-09-02 | 1990-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-03 | 1993-09-02 | 1994-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-03 | 1997-09-02 | 1998-03-04 | $7700.00 | Window Closed / Lapsed |