US4030508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low output electrode for cardiac pacing
Assignee: Medtronic Puerto Rico Inc
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Filing: 1976-02-04
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Granted: 1977-06-21
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Expires: 1996-02-04
Abstract
Abstract An electrode for use in combination with a cardiac pacer for endocardial stimulation, having an electrode contact tip at the distal end which has an annular shape with rounded edges for providing a very small stimulating surface, with the largest possible area of such surface in optimal position for direct contact with the heart muscle.
Inventors
- 👤 Hilbert J. Th. Thalen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:16
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/056; A61N1/057; A61N1/0565
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
104 words
A catheter for use in a cardiac pacing system, the catheter serving to deliver stimulus pulses from a pacer to a patient's heart, said catheter comprising: a. a conductor extending substantially the length of the catheter, and having an insulating casing around it; b. a stimulating tip at one end of said catheter, said tip connected electrically to said conductor and having a rounded annular exposed surface, said exposed surface defining a central opening having a diameter of at least 1 mm and having an axial length much less than its outer diameter; and c. an element of isolating material positioned within said opening.
Claim 2
Dependent Claim
104 words
A catheter for use in a cardiac pacing system, the catheter serving to deliver stimulus pulses from a pacer to a patient's heart, said catheter comprising: a. a conductor extending substantially the length of the catheter, and having an insulating casing around it; b. a stimulating tip at one end of said catheter, said tip connected electrically to said conductor and having a rounded annular exposed surface, said exposed surface defining a central opening having a diameter of at least 1 mm and having an axial length much less than its outer diameter; and c. an element of isolating material positioned within said opening.
Claim 3
Dependent Claim
18 words
The catheter as described in claim 1, wherein said annular surface consists only of a 90° rounded edge.
Claim 4
Dependent Claim
18 words
The catheter as described in claim 1, wherein said annular tip surface is rounded with a 90° edge.
Claim 5
Dependent Claim
45 words
The catheter as described in claim 4, comprising a flange made of an insulating material connected to said casing at said one end of said catheter, said flange being adapted to maintain said catheter tip securely in contact with the heart tissue of said patient.
Claim 6
Dependent Claim
20 words
The catheter as described in claim 1, wherein said annular surface is limited in area to 8 mm 2 .
Claim 7
Dependent Claim
146 words
A cardiac pacing system for delivering stimulus pulses to the heart of a patient, comprising: a. pacer means for generating stimulus signals limited in length to about 0.5 ms; b. a catheter for delivering stimulus pulses from said pacer means to a patient's heart, said catheter having a conductor extending substantially the length of the catheter and having an insulating casing around said conductor, and connecting means for connecting a first end of said conductor to the output of said pacer means; c. said catheter having a stimulating tip connected to said conductor at its opposite said first end, said stimulating tip having an exposed surface which is annular in shape and defines a central opening having a diameter of at least 1.0 mm and which has a surface area limited to 8 square millimeters; and d. an element of isolating material positioned in said opening.
Claim 8
Dependent Claim
146 words
A cardiac pacing system for delivering stimulus pulses to the heart of a patient, comprising: a. pacer means for generating stimulus signals limited in length to about 0.5 ms; b. a catheter for delivering stimulus pulses from said pacer means to a patient's heart, said catheter having a conductor extending substantially the length of the catheter and having an insulating casing around said conductor, and connecting means for connecting a first end of said conductor to the output of said pacer means; c. said catheter having a stimulating tip connected to said conductor at its opposite said first end, said stimulating tip having an exposed surface which is annular in shape and defines a central opening having a diameter of at least 1.0 mm and which has a surface area limited to 8 square millimeters; and d. an element of isolating material positioned in said opening.
Claim 9
Dependent Claim
22 words
The cardiac pacing system as described in claim 6, wherein said shape has an axial length much less than said opening diameter.
Claim 10
Dependent Claim
18 words
The cardiac pacing system as described in claim 7, wherein said annular shape comprises a 90° rounded edge.
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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) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |