Patent US4972833A successfully refreshed from Google Patents.
US4972833A
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Epicardiac pacing lead
Assignee: WestMed Pty Ltd
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Filing: 1987-01-22
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Granted: 1990-11-27
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Expires: 2007-01-22
Abstract
Abstract An epicardiac pacing lead for ventricular or atrial pacing of the heat of a cardiac patient. The epicardiac pacing lead comprises a catheter housing two elongated electrical conductors one end of each of which is adapted for electrical connection to a source of electrical stimulation and the other end of which is connected to a respective stimulating electrode on the catheter. The section of the catheter adjacent the electrodes has a stiffness characteristic which allows the section to be bent manually and to maintain a configuration into which it has been bent while allowing the section to straighten automatically to follow the course of the catheter as it is withdrawn from the body of the patient. The end portion of the section adjacent the electrode is configured so as to provide a compression spring to facilitate location of the epicardiac pacing lead in position.
Inventors
- 👤 Michael P. Wildon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:40
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/0587
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
116 words
An eqicardiac pacing lead comprising a catheter housing an elongated electrical conductor one end of which comprises an electrical connection to a source of electrical stimulation and the other end connected to a stimulating electrode on the catheter, for stimulating surface epicardial tissue characterized in that at least the section of the catheter adjacent said stimulating electrode has sufficient resilience to be bent manually upon insertion and for tending to return to its unbent configuration for resiliently maintaining said stimulating eleotrode in electrical contact with said surface epicardial tissue, said resilience being sufficient for said section to straighten automatically to follow the course of said catheter when it is withdrawn from the body of the patient.
Claim 2
Dependent Claim
116 words
An eqicardiac pacing lead comprising a catheter housing an elongated electrical conductor one end of which comprises an electrical connection to a source of electrical stimulation and the other end connected to a stimulating electrode on the catheter, for stimulating surface epicardial tissue characterized in that at least the section of the catheter adjacent said stimulating electrode has sufficient resilience to be bent manually upon insertion and for tending to return to its unbent configuration for resiliently maintaining said stimulating eleotrode in electrical contact with said surface epicardial tissue, said resilience being sufficient for said section to straighten automatically to follow the course of said catheter when it is withdrawn from the body of the patient.
Claim 3
Dependent Claim
18 words
An epicardiac pacing lead to claim 1 the electrode is located contiguous to one end of the catheter.
Claim 4
Dependent Claim
26 words
An epicardiac pacing lead according to claim 1 wherein said end portion of said section adjacent the electrode is configured for acting as a compression spring.
Claim 5
Dependent Claim
33 words
An epicardiac pacing lead according to claim 3 further comprising a second electrode for contacting the body of the patient, the second electrode being adapted for electrical connection to said electrical stimulation source.
Claim 6
Dependent Claim
33 words
An epicardiac pacing lead according to claim 3 further comprising a second electrode for contacting the body of the patient, the second electrode being adapted for electrical connection to said electrical stimulation source.
Claim 7
Dependent Claim
37 words
An epicardiac pacing lead according to claim 1 further comprising a second electrode carried by said catheter for contacting the body of the patient, the second electrode being adapted for electrical connection to said electrical simulation source.
Claim 8
Dependent Claim
26 words
An epicardiac pacing lead according to claim 6 wherein said second electrode is connected to one end of a second elongated conductor housed in the catheter.
Claim 9
Dependent Claim
36 words
An epicardiac pacing lead according to claim 6 wherein each electrode is so shaped as to present relatively low physical resistance to oncoming body tissue as the catheter is withdrawn from a body of the patient.
Claim 10
Dependent Claim
37 words
An epicardiac pacing lead according to claim 8 wherein each electrode is in the form of a fixed spring extending generally along the catheter with the fixed end thereof furthermost from the inner end of the catheter.
Claim 11
Dependent Claim
36 words
An epicardiac pacing lead according to claim 1 wherein the electrode is so shaped as to present relatively low physical resistance to oncoming body tissue as the catheter is withdrawn from a body of the patient.
Claim 12
Dependent Claim
34 words
An epicardiac pacing lead according to claim 10 wherein the electrode is includes a fixed spring extending generally along the catheter with the fixed and thereof futhermost from the inner end of the catheter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-26 | 1994-05-28 | 1994-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-26 | 1998-05-28 | 1998-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-26 | 2002-05-28 | 2002-11-27 | $7700.00 | Window Closed / Lapsed |