Patent US4996984A successfully refreshed from Google Patents.
US4996984A
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Defibrillation method
Assignee: Cardiac Pacemakers Inc
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Filing: 1989-09-26
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Granted: 1991-03-05
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Expires: 2009-09-26
Abstract
Abstract The present invention provides a method for defibrillating a mammal in need of defibrillation employing multiple bursts of electrical current delivered to the mammal, the timing between said bursts being based upon the mammal's fibrillation cycle length.
Inventors
- 👤 Robert J. Sweeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:26
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/38; A61N1/39; A61N1/3987; A61N1/3904; A61N1/3956
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
51 words
A method of defibrillating a mammal in need of defibrillation comprising: (a) first determining the mammal's fibrillation cycle length; and (b) then administering to said mammal a plurality of bursts of electrical current delivered sequentially to said mammal, adjusting the timing between said bursts based upon said mammal's fibrillation cycle length.
Claim 2
Independent Claim
51 words
A method of defibrillating a mammal in need of defibrillation comprising: (a) first determining the mammal's fibrillation cycle length; and (b) then administering to said mammal a plurality of bursts of electrical current delivered sequentially to said mammal, adjusting the timing between said bursts based upon said mammal's fibrillation cycle length.
Claim 3
Dependent Claim
14 words
A method of claim 1 wherein the plurality of bursts consists of two bursts.
Claim 4
Dependent Claim
28 words
A method of claim 2 wherein the timing between the two bursts of electrical current is from about 30% to about 200% of the mammal's fibrillation cycle length.
Claim 5
Dependent Claim
23 words
A method of claim 3 wherein the timing between bursts is from about 60% to about 85% of the mammal's fibrillation cycle length.
Claim 6
Dependent Claim
19 words
A method of claim 4 wherein the timing between bursts is about 75% of the mammal's fibrillation cycle length.
Claim 7
Dependent Claim
14 words
A method of claim 1 wherein the plurality of bursts consists of three bursts.
Claim 8
Dependent Claim
30 words
A method of claim 1 wherein the timing between each pair of bursts of electrical current is independently from about 30% to about 200% of the mammal's fibrillation cycle length.
Claim 9
Dependent Claim
27 words
A method of claim 7 wherein the timing between each pair of bursts is independently from about 60% to about 85% of the mammal's fibrillation cycle length.
Claim 10
Dependent Claim
23 words
A method of claim 8 wherein the timing between each pair of bursts is independently about 75% of the mammal's fibrillation cycle length.
Claim 11
Dependent Claim
19 words
A method of claim 1 wherein the bursts of electrical current are administered within the body of the mammal.
Claim 12
Dependent Claim
14 words
A method of claim 10 wherein the plurality of bursts consists of two bursts.
Claim 13
Dependent Claim
20 words
A method of claim 10 wherein the voltage of each burst is from about 20 volts to about 800 volts.
Claim 14
Dependent Claim
17 words
A method of claim 12 wherein the voltage is from about 100 volts to about 500 volts.
Claim 15
Dependent Claim
17 words
A method of claim 13 wherein the voltage is from about 200 volts to about 300 volts.
Claim 16
Dependent Claim
30 words
A method of claim 10 wherein the timing between each pair of bursts of electrical current is independently from about 30% to about 200% of the mammal's fibrillation cycle length.
Claim 17
Dependent Claim
26 words
A method of claim 15 wherein the timing between each pair of bursts is independently from about 60% to about85% of the mammal's fibrillation cycle length.
Claim 18
Dependent Claim
23 words
A method of claim 16 wherein the timing between each pair of bursts is independently about 75% of the mammal's fibrillation cycle length.
Claim 19
Dependent Claim
57 words
A method of claim 16 wherein the plurality of bursts consists of two bursts; the current of each burst is from about 4 amps to about 10 amps; the voltage of each burst is from about 200 volts to about 300 volts; and the duration of each burst is from about 8 milliseconds to about 15 milliseconds.
Claim 20
Dependent Claim
15 words
A method of claim 18 wherein each burst is a standard truncated exponential waveform burst.
Claim 21
Dependent Claim
20 words
A method of claim 1 wherein the current of each burst is from about 0.4 amps to about 16 amps.
Claim 22
Dependent Claim
17 words
A method of claim 20 wherein the current is from about 4 amps to about 10 amps.
Claim 23
Dependent Claim
20 words
A method of claim 1 wherein the duration of each burst is from about 1 millisecond to about 40 milliseconds.
Claim 24
Dependent Claim
20 words
A method of claim 22 wherein the duration of each burst is from about 5 milliseconds to about 25 milliseconds.
Claim 25
Dependent Claim
20 words
A method of claim 23 wherein the duration of each burst is from about 8 milliseconds to about 15 milliseconds.
Claim 26
Dependent Claim
15 words
A method of claim 1 wherein each burst is a standard truncated exponential waveform burst.
Claim 27
Independent Claim
93 words
A method of defibrillating a mammal in need of defibrillation comprising: (a) first determining the mammal's fibrillation cycle length; and (b) then administering to said mammal two bursts of electrical current delivered sequentially to said mammal; the current of each burst being from about 4 amps to about 10 amps; the voltage of each burst being from about 200 volts to about 300 volts; the duration of each burst being from about 8 milliseconds to about 15 milliseconds; and adjusting the timing between bursts to about 75% of the mammal's fibrillation cycle length.
Claim 28
Independent Claim
93 words
A method of defibrillating a mammal in need of defibrillation comprising: (a) first determining the mammal's fibrillation cycle length; and (b) then administering to said mammal two bursts of electrical current delivered sequentially to said mammal; the current of each burst being from about 4 amps to about 10 amps; the voltage of each burst being from about 200 volts to about 300 volts; the duration of each burst being from about 8 milliseconds to about 15 milliseconds; and adjusting the timing between bursts to about 75% of the mammal's fibrillation cycle length.
Claim 29
Dependent Claim
15 words
A method of claim 26 wherein each burst is a standard truncated exponential waveform burst.
References Cited (Backward Citations)
US4559946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-03-04 | 1994-09-03 | 1995-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-04 | 1998-09-03 | 1999-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-04 | 2002-09-03 | 2003-03-05 | $7700.00 | Window Closed / Lapsed |