US5476500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endocardial lead system with defibrillation electrode fixation
Assignee: Pacesetter Inc
•
Filing: 1993-12-20
•
Granted: 1995-12-19
•
Expires: 2013-12-20
Abstract
Abstract A lead system for use with an implantable cardioverter/defibrillator is disclosed. The lead system includes a fixation hook positioned approximately half-way between the distal tip of the lead and the tricuspid valve. The distal tip of the lead is positioned at the apex of the right ventricle and may or may not be secured there by a second fixation means such as a screw tip or tines. The fixation hook allows the defibrillation electrode to be accurately positioned by the patient's surgeon and maintained in contact with the septum wall of the patient's heart. By providing such intimate contact between the defibrillation electrode and the septum wall, defibrillation thresholds are reduced.
Inventors
- 👤 Eric S. Fain
- 👤 Drew A. Hoffman
- 👤 Benjamin D. Pless
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:59
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/056; A61N1/057; A61N1/0573; A61N1/0563
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
96 words
An endocardial defibrillation lead comprising: a lead body having a distal end for positioning within a patient's heart and a proximal end for connection to an implantable pulse generator; a defibrillation electrode positioned on said lead body near said lead body distal end, said defibrillation electrode having distal and proximal ends; and fixation means positioned on said lead body proximal of said distal end of said defibrillation electrode for securing said lead body to a portion of said patient's heart, wherein said fixation means is positioned between said distal and proximal ends of said defibrillation electrode.
Claim 2
Dependent Claim
96 words
An endocardial defibrillation lead comprising: a lead body having a distal end for positioning within a patient's heart and a proximal end for connection to an implantable pulse generator; a defibrillation electrode positioned on said lead body near said lead body distal end, said defibrillation electrode having distal and proximal ends; and fixation means positioned on said lead body proximal of said distal end of said defibrillation electrode for securing said lead body to a portion of said patient's heart, wherein said fixation means is positioned between said distal and proximal ends of said defibrillation electrode.
Claim 3
Dependent Claim
37 words
The endocardial defibrillation lead of claim 1 and further including means disposed at said distal end of the lead body for securing said distal end of the lead body to a separate portion of said patient's heart.
Claim 4
Dependent Claim
23 words
The endocardial defibrillation lead of claim 2 wherein said means disposed at the distal end of said lead body comprises a helical screw.
Claim 5
Dependent Claim
33 words
The endocardial defibrillation lead of claim 3 wherein said means disposed at the distal end of said lead body comprises a plurality of tines oriented at an acute angle along said lead body.
Claim 6
Dependent Claim
58 words
The endocardial defibrillation lead of claim 1 wherein said lead body includes a lumen extending therethrough, said lead further including a stylet for positioning within said lumen and having a distal end adapted to actuate said fixation means whereby said fixation means is caused to extend laterally from said lead body into said portion of said patient's heart.
Claim 7
Dependent Claim
20 words
The endocardial defibrillation lead of claim 5 wherein said lumen is disposed along a central axis of said lead body.
Claim 8
Dependent Claim
24 words
The endocardial defibrillation lead of claim 5 wherein said lumen is spaced radially from and parallel to a central axis of said lead body.
Claim 9
Dependent Claim
25 words
The endocardial defibrillation lead of claim 2 wherein said lead body further includes a pacing/sensing electrode positioned at said distal end of said lead body.
Claim 10
Dependent Claim
18 words
The endocardial defibrillation lead of claim 2 wherein said fixation means is electrically connected to said defibrillation electrode.
Claim 11
Dependent Claim
24 words
The endocardial defibrillation lead of claim 1 wherein said fixation means includes at least two hooks spaced from each other along said lead body.
Claim 12
Dependent Claim
55 words
The endocardial defibrillation lead of claim 1 wherein said lead body includes a central lumen extending along the length of said lead body and a fixation lumen extending parallel to said central lumen along a portion of said lead body, said fixation lumen being adapted to receive a stylet for actuation of said fixation means.
Claim 13
Dependent Claim
50 words
The endocardial defibrillation lead of claim 1 and further including an insertion catheter for temporary use in transvenously positioning said lead body and for subsequent removal from said patient's body whereby said lead body is positioned within said catheter before or after insertion of said catheter in said patient's body.
Claim 14
Dependent Claim
16 words
The endocardial defibrillation lead of claim 1 wherein said fixation means comprises a spiral-shaped fixing hook.
Claim 15
Dependent Claim
15 words
The endocardial defibrillation lead of claim 1 wherein said fixation means comprises a biocompatible adhesive.
Claim 16
Dependent Claim
111 words
An endocardial defibrillation lead comprising: a lead body having a distal end for positioning within a patient's heart and a proximal end for connection to an implantable pulse generator; a defibrillation electrode positioned on said lead body near said lead body distal end, said defibrillation electrode having distal and proximal ends; and fixation means positioned on said lead body proximal of said distal end of said defibrillation electrode for securing said lead body to a portion of said patient's heart, wherein said fixation means is positioned between said distal and proximal ends of said defibrillation electrode, and wherein said fixation means comprises a rigid curved hook secured to said lead body.
Claim 17
Dependent Claim
111 words
An endocardial defibrillation lead comprising: a lead body having a distal end for positioning within a patient's heart and a proximal end for connection to an implantable pulse generator; a defibrillation electrode positioned on said lead body near said lead body distal end, said defibrillation electrode having distal and proximal ends; and fixation means positioned on said lead body proximal of said distal end of said defibrillation electrode for securing said lead body to a portion of said patient's heart, wherein said fixation means is positioned between said distal and proximal ends of said defibrillation electrode, and wherein said fixation means comprises a rigid curved hook secured to said lead body.
Claim 18
Dependent Claim
31 words
The endocardial defibrillation lead of claim 15 wherein said fixation means is initially encapsulated in a material which dissolves following exposure of the lead system to body fluids of said patient.
Claim 19
Dependent Claim
18 words
The endocardial defibrillation lead of claim 15 wherein said fixation means is electrically connected to said defibrillation electrode.
References Cited (Backward Citations)
USRE30366E
Cited
US3902501A
Cited
DE2453840A1
Cited
US3999555A
Cited
US4233992A
Cited
US4282886A
Cited
US4289144A
Cited
US4643201A
Cited
US4402329A
Cited
US4570642A
Cited
US4677990A
Cited
US4827940A
Cited
US4858623A
Cited
WO1989006148A1
Cited
US5052407A
Cited
US4945922A
Cited
US5016808A
Cited
US4998975A
Cited
US5174289A
Cited
US5144960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-18 | 1999-06-19 | 1999-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-18 | 2003-06-19 | 2003-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-18 | 2007-06-19 | 2007-12-19 | $7700.00 | Window Closed / Lapsed |