US5456708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable pin, screw-in pacing and sensing lead having improved tip and fluidic seal
Assignee: Pacesetter Inc
•
Filing: 1993-10-28
•
Granted: 1995-10-10
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Expires: 2013-10-28
Abstract
Abstract A rotatable pin, screw-in type lead assembly includes a radiopaque element proximate the distal tip of the lead assembly for permitting direct, rapid fluoroscopic verification of the amount of extension of the helix electrode relative to the tip. The radiopaque element is preferably in the form of a metallic ring having a porous, tissue-engaging outer surface which promotes rapid tissue ingrowth and consequent lead stabilization. The lead assembly further includes a low friction seal assembly operatively associated with a shaft carrying the helix electrode. The seal assembly reduces the number of turns of the lead assembly connector pin required to effect lead fixation or removal.
Inventors
- 👤 Phong D. Doan
- 👤 John R. Helland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:59
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/056; A61N1/057; A61N1/0573
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
196 words
An implantable flexible lead assembly adapted to transmit electrical pulses between a proximal end of the lead assembly and a distal end of the lead assembly and to thereby stimulate selected body tissue, the lead assembly including: a helix electrode for engaging the selected body tissue; a tubular, insulating housing extending between the proximal and distal ends of the lead assembly, the tubular housing including a header having a distal tip surface, the header further including means for causing the helix electrode to extend and retract relative to the distal tip surface upon rotation of the helix electrode; a conductor coil extending between the proximal and distal ends of the lead assembly for transmitting the pulses, the conductor coil having a proximal end and a distal end, the conductor coil being adapted to rotate the helix electrode through rotation of the proximal end of the conductor coil; a helix shaft coupling the distal end of the conductor coil and the helix electrode; and a seal operatively associated with the helix shaft for preventing the ingress of bodily fluids, said seal comprising a washer-like element including an inner portion tapering to a small, low friction contact area.
Claim 2
Dependent Claim
196 words
An implantable flexible lead assembly adapted to transmit electrical pulses between a proximal end of the lead assembly and a distal end of the lead assembly and to thereby stimulate selected body tissue, the lead assembly including: a helix electrode for engaging the selected body tissue; a tubular, insulating housing extending between the proximal and distal ends of the lead assembly, the tubular housing including a header having a distal tip surface, the header further including means for causing the helix electrode to extend and retract relative to the distal tip surface upon rotation of the helix electrode; a conductor coil extending between the proximal and distal ends of the lead assembly for transmitting the pulses, the conductor coil having a proximal end and a distal end, the conductor coil being adapted to rotate the helix electrode through rotation of the proximal end of the conductor coil; a helix shaft coupling the distal end of the conductor coil and the helix electrode; and a seal operatively associated with the helix shaft for preventing the ingress of bodily fluids, said seal comprising a washer-like element including an inner portion tapering to a small, low friction contact area.
Claim 3
Dependent Claim
21 words
The lead assembly, as defined in claim 1, in which: the seal is sandwiched between a pair of longitudinally spaced-apart washers.
Claim 4
Dependent Claim
31 words
The lead assembly, as defined in claim 2, in which: the seal is made of a biocompatible, biostable polymeric material; and the washers are made of a biocompatible, biostable metallic material.
Claim 5
Dependent Claim
167 words
An implantable stimulation lead assembly adapted to transmit electrical pulses between a proximal and a distal end of the lead assembly and to thereby stimulate selected body tissue, the lead assembly including: screw-in electrode means for engaging the selected body tissue; a tubular, insulating housing extending between the proximal and distal ends of the lead assembly, the tubular housing including a distal end having a distal tip surface, the distal end further including means for causing the screw-in electrode means to extend and retract relative to the distal tip surface upon rotation of the screw-in electrode means; a conductor coil extending between the proximal and distal ends of the lead assembly, the conductor coil having a proximal end and a distal end, the conductor coil being adapted to rotate the screw-in electrode means through rotation of the proximal end of the conductor coil; a shaft coupling the conductor coil and the screw-in electrode means; and sealing means, encircling the shaft, for preventing the ingress of bodily fluids.
Claim 6
Dependent Claim
167 words
An implantable stimulation lead assembly adapted to transmit electrical pulses between a proximal and a distal end of the lead assembly and to thereby stimulate selected body tissue, the lead assembly including: screw-in electrode means for engaging the selected body tissue; a tubular, insulating housing extending between the proximal and distal ends of the lead assembly, the tubular housing including a distal end having a distal tip surface, the distal end further including means for causing the screw-in electrode means to extend and retract relative to the distal tip surface upon rotation of the screw-in electrode means; a conductor coil extending between the proximal and distal ends of the lead assembly, the conductor coil having a proximal end and a distal end, the conductor coil being adapted to rotate the screw-in electrode means through rotation of the proximal end of the conductor coil; a shaft coupling the conductor coil and the screw-in electrode means; and sealing means, encircling the shaft, for preventing the ingress of bodily fluids.
Claim 7
Dependent Claim
58 words
The lead assembly, as defined in claim 4, in which the sealing means comprises: a washer-like seal made of a biocompatible, biostable polymeric material, the washer-like seal having an inner portion tapering to a small, low friction contact area; and a pair of longitudinally spaced-apart washers, the washer-like seal being sandwiched between the pair of longitudinally spaced-apart washers.
References Cited (Backward Citations)
US4106512A
Cited
US4233992A
Cited
US4146036A
Cited
US4217913A
Cited
US4282885A
Cited
US4209019A
Cited
US4350169A
Cited
US4357946A
Cited
US4311153A
Cited
USRE32227E
Cited
US4463765A
Cited
US4624266A
Cited
US4667686A
Cited
US4628943A
Cited
US4799499A
Cited
US4886074A
Cited
US4819661A
Cited
US4967766A
Cited
US4953564A
Cited
US4972848A
Cited
US5002067A
Cited
US5097843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-10-09 | 1999-04-10 | 1999-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-09 | 2003-04-10 | 2003-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-09 | 2007-04-10 | 2007-10-10 | $7700.00 | Window Closed / Lapsed |