US5376105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defibrillator/cardioverter
Assignee: Pacesetter AB
•
Filing: 1993-05-27
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Granted: 1994-12-27
•
Expires: 2013-05-27
Abstract
Abstract In order to be able to set a current distribution in the heart in the event of defibrillation which is optimum both spatially and temporally, a pulse-generating device is provided having n-1 outputs connected in series, to which a total of n output terminals and n electrodes are connected. The device generates output pulses at its outputs which temporally overlap one another at different times and in different numbers.
Inventors
- 👤 Sven-Erik Hedberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:22
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/38; A61N1/39; A61N1/3956; A61N1/3918
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
A defibrillator/cardioverter comprising: a plurality of n electrodes, n being greater than or equal to three, adapted for delivering electrical pulses to the heart of a patient; and pulse generator means, having n-1 series-connected outputs with n output terminals respectively connected to said n electrodes, for generating an electrical output pulse at each of said outputs with a different plurality m of said output pulses being transmitted with temporal overlap to said heart via said electrodes in directly successive time intervals, with m greater than or equal to one and less than or equal to n-1.
Claim 2
Dependent Claim
96 words
A defibrillator/cardioverter comprising: a plurality of n electrodes, n being greater than or equal to three, adapted for delivering electrical pulses to the heart of a patient; and pulse generator means, having n-1 series-connected outputs with n output terminals respectively connected to said n electrodes, for generating an electrical output pulse at each of said outputs with a different plurality m of said output pulses being transmitted with temporal overlap to said heart via said electrodes in directly successive time intervals, with m greater than or equal to one and less than or equal to n-1.
Claim 3
Dependent Claim
50 words
A defibrillator/cardioverter as claimed in claim 1 wherein each of said output pulses has a pulse start, a pulse duration and a pulse height, and wherein said pulse generator means includes means for varying at least one of the pulse start, pulse duration and pulse height of said output pulses.
Claim 4
Dependent Claim
96 words
A defibrillator/cardioverter as claimed in claim 2 wherein said means for varying comprises: a capacitor connected across a charging circuit for charging said capacitor; a first set of controllable switches connected between one side of said capacitor and each of said output terminals; a second set of controllable switches connected between an opposite side of said capacitor and each of said output terminals; and control means for individually actuating each of said switches in said first and second sets of controllable switches for varying at least one of said pulse start, pulse duration and pulse height.
Claim 5
Dependent Claim
63 words
A defibrillator/cardioverter as claimed in claim 2 wherein said means for varying comprises: a charging circuit; n-1 series-connected capacitors connected across said charging circuit for charging said capacitors; a plurality of individually controllable switches respectively connected between said capacitors and said output terminals; and means for controlling said switches for varying at least one of said pulse start, pulse duration and pulse height.
Claim 6
Dependent Claim
21 words
A defibrillator/cardioverter as claimed in claim 4 wherein said charging circuit includes means for charging said capacitors individually to different voltages.
Claim 7
Dependent Claim
85 words
A defibrillator/cardioverter as claimed in claim 2 further comprising: a parameter memory, in which a plurality of different values of said pulse start, pulse duration and pulse height are stored for said output pulses and connected to said means for varying for transmitting said values to said means for varying for use in varying at least one of said pulse start, pulse duration and pulse height; and telemetry means for telemetrically communicating with said parameter memory for entering said different values into said parameter memory.
Claim 8
Dependent Claim
53 words
A defibrillator/cardioverter as claimed in claim 2 further comprising measuring means for measuring electrical impedance between said electrodes and for supplying a signal corresponding to said electrical impedance to said means for varying for automatically varying at least one of said pulse start, pulse duration and pulse height dependent on said electrical impedance.
Claim 9
Dependent Claim
67 words
A defibrillator/cardioverter as claimed in claim 2 further comprising measuring means for measuring electric current in a current path formed by at least one output terminal of said pulse generator means and for supplying an electrical signal corresponding to said electric current to said means for varying for automatically varying at least one of said pulse start, pulse duration and pulse height dependent on said electric current.
Claim 10
Dependent Claim
69 words
A defibrillator/cardioverter as claimed in claim 2 further comprising: means for measuring electrical impedance between said electrodes; and means for telemetrically communicating with said means for measuring and with said means for varying for providing an indication of said electrical impedance at a remote location and for permitting human intervention, based on said indication, to vary at least one of said pulse start, pulse duration and pulse height telemetrically.
Claim 11
Dependent Claim
81 words
A defibrillator/cardioverter as claimed in claim 2 further comprising: means for measuring electric current in a current path of at least one output terminal of said pulse generator means; and means for telemetrically communicating with said means for measuring and with said means for varying for providing an indication of said electric current at a remote location and for permitting human intervention, based on said indication, to vary at least one of said pulse start, pulse duration and pulse height telemetrically.
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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) | 1997-12-26 | 1998-06-27 | 1998-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-26 | 2002-06-27 | 2002-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-26 | 2006-06-27 | 2006-12-27 | $7700.00 | Window Closed / Lapsed |