US5352239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing configurable biphastic defibrillation waveforms
Assignee: Pacesetter Inc
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Filing: 1993-03-24
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Granted: 1994-10-04
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Expires: 2013-03-24
Abstract
Abstract A programmable implantable medical device utilizable for delivering a configurable defibrillation waveform to a heart. The device includes defibrillation electrode means adapted to be connected to the heart for delivering a multiphasic defibrillation waveform thereto. A programmable waveform generator connected to the heart generates the multiphasic waveform such that at least one phase of the defibrillation waveform has programmed constant tilt.
Inventors
- 👤 Benjamin Pless
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:24
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/38; A61N1/39; A61N1/3956; A61N1/3906; A61N1/3912
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
154 words
An implantable medical device utilizable for delivering a configurable biphasic defibrillation waveform to a heart, the medical device comprising: (a) charge storage means; (b) charging means for charging the storage means to an initial selected voltage; (c) control means for initiating delivery of a first defibrillation pulse of a first polarity to the heart when the storage means stores the initial selected voltage and for initiating delivery of a second defibrillation pulse of a second polarity to the heart when the voltage of the charge storage means decays to a programmed decay voltage, said control means including timer means for measuring the duration of the first defibrillation pulse and means for delivering said second defibrillation pulse having a duration related to the measured duration of the first defibrillation pulse; and (d) programmable disable means for terminating the first defibrillation pulse when the voltage of the charge storage means decays to the programmed decay voltage.
Claim 2
Dependent Claim
154 words
An implantable medical device utilizable for delivering a configurable biphasic defibrillation waveform to a heart, the medical device comprising: (a) charge storage means; (b) charging means for charging the storage means to an initial selected voltage; (c) control means for initiating delivery of a first defibrillation pulse of a first polarity to the heart when the storage means stores the initial selected voltage and for initiating delivery of a second defibrillation pulse of a second polarity to the heart when the voltage of the charge storage means decays to a programmed decay voltage, said control means including timer means for measuring the duration of the first defibrillation pulse and means for delivering said second defibrillation pulse having a duration related to the measured duration of the first defibrillation pulse; and (d) programmable disable means for terminating the first defibrillation pulse when the voltage of the charge storage means decays to the programmed decay voltage.
Claim 3
Dependent Claim
18 words
An implantable medical device as in claim 1 wherein the duration of the second defibrillation pulse is programmable.
References Cited (Backward Citations)
US4708145A
Cited
US4996984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-03 | 1998-04-04 | 1998-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-03 | 2002-04-04 | 2002-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-03 | 2006-04-04 | 2006-10-04 | $7700.00 | Window Closed / Lapsed |