US4944088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ring electrode for multiconductor pacing leads
Assignee: Medtronic Inc
•
Filing: 1988-05-25
•
Granted: 1990-07-31
•
Expires: 2008-05-25
Abstract
Abstract A cardiac pacing lead has a plurality of individually insulated conductors arranged as a multifilar coil. The lead includes a connector assembly and a ring electrode assembly, each of which are optimized for use in conjunction with conductors arranged in the form of a multifilar coil. The connector assembly takes the form of an in-line connector having a plurality of linearly arranged connecting surfaces, each coupled to one of the conductors in the multifilar coil. The ring electrode assembly is constructed such that it displays the same outer diameter as the pacing lead. In both assemblies, conductors are coupled by means of welds, rather than by crimping or swaging.
Inventors
- 👤 Phong D. Doan
- 👤 Kenneth E. Cobian
- 👤 James E. Upton
- 👤 Daniel C. Haeg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:32
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/056; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49174; Y10T29/49176
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
225 words
A method for fabricating an electrode for a medical electrical lead, comprising the steps of: selecting a multifilar coil having at least two conductors and terminating one of the conductors intermediate the ends of the coil; selecting a cylindrical sleeve of a thermoplastic material, having an internal lumen and a bore perpendicular to the internal lumen and sliding said sleeve over said multifilar coil and bringing the end of said terminated conductor out through said bore; placing said sleeve and coil into a mold and applying heat, causing said sleeve to bond to said multifilar coil and to flow between the conductors of said multifilar coil; sliding a cylindrical ring electrode over said sleeve intermediate the proximal and distal ends of said sleeve and electrically coupling said end of said terminated conductor to said cylindrical electrode; and sliding first and second insulative sheaths over the proximal and distal ends of said sleeve, respectively, placing said ring electrode and the ends of said first and second sheaths into a mold and applying heat to bond the portions of said sleeve located proximal and distal to said electrode to said first and second sheaths to provide a continuous electrically insulative and fluid tight tubular structure extending through said ring electrode and to collapse the bore of said sleeve around said terminated conductor to provide a fluid seal.
Claim 2
Independent Claim
225 words
A method for fabricating an electrode for a medical electrical lead, comprising the steps of: selecting a multifilar coil having at least two conductors and terminating one of the conductors intermediate the ends of the coil; selecting a cylindrical sleeve of a thermoplastic material, having an internal lumen and a bore perpendicular to the internal lumen and sliding said sleeve over said multifilar coil and bringing the end of said terminated conductor out through said bore; placing said sleeve and coil into a mold and applying heat, causing said sleeve to bond to said multifilar coil and to flow between the conductors of said multifilar coil; sliding a cylindrical ring electrode over said sleeve intermediate the proximal and distal ends of said sleeve and electrically coupling said end of said terminated conductor to said cylindrical electrode; and sliding first and second insulative sheaths over the proximal and distal ends of said sleeve, respectively, placing said ring electrode and the ends of said first and second sheaths into a mold and applying heat to bond the portions of said sleeve located proximal and distal to said electrode to said first and second sheaths to provide a continuous electrically insulative and fluid tight tubular structure extending through said ring electrode and to collapse the bore of said sleeve around said terminated conductor to provide a fluid seal.
Claim 3
Dependent Claim
17 words
A method according to claim 1 further comprising the step of applying adhesion enhancers to said sleeve.
Claim 4
Dependent Claim
28 words
A method according to claim 1 wherein said step of coupling said end of said terminated conductor to said electrode comprises laser welding said conductor to said electrode.
Claim 5
Dependent Claim
58 words
A method according to claim 1 further comprising the step of inserting a plastic liner into the interior of said multifilar coil and bonding the proximal and distal ends of said cylindrical sleeve to said plastic liner prior to the step of sliding said first and second insulative sheaths over the proximal and distal ends of said sleeve.
References Cited (Backward Citations)
US3596622A
Cited
CA1146228A
Cited
US4280511A
Cited
US4328812A
Cited
US4381014A
Cited
US4630611A
Cited
US4444195A
Cited
US4437474A
Cited
US4590950A
Cited
US4711027A
Cited
US4538623A
Cited
US4592372A
Cited
US4608986A
Cited
US4643202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |