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Defibrillator discharge calibration system
Assignee: CREDITANSTALT BANKVEREIN
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Filing: 1990-10-18
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Granted: 1993-06-29
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Expires: 2010-10-18
Abstract
Abstract A defibrillator (10) is disclosed in which measured information concerning the energy delivered by the defibrillator to a meter (56) is employed to calibrate subsequent discharges by the defibrillator at the same energy level. In connection with that process, a microprocessor (70) controls the operation of a feedback loop (50), including a controlled-gain amplifier (64), level detector (66), adder (68) and energy charger (58), to adjust the voltage applied to a discharge capacitor (54) in response to the energy measured by the meter. The information can be input to the microprocessor either manually or automatically and can be used by the microprocessor in performing a piecewise linear approximation of the voltage adjustment required to deliver the desired nominal energy, or in performing a direct computation of that adjustment. This process is repeated for each of the energy levels selectively dischargeable by the defibrillator.
Inventors
- 👤 Charles. Couche
- 👤 Walter A. I. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:51
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/38; A61N1/39; A61N1/3925; A61N1/3937
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
58 words
A defibrillator for controlling the discharge of energy to a patient in response to an earlier measurement of energy discharged by the defibrillator, comprising: input means for allowing the measurement of energy to be input to said defibrillator; and control means for controlling the discharge of energy in response to the measurement of energy input to said defibrillator.
Claim 2
Dependent Claim
58 words
A defibrillator for controlling the discharge of energy to a patient in response to an earlier measurement of energy discharged by the defibrillator, comprising: input means for allowing the measurement of energy to be input to said defibrillator; and control means for controlling the discharge of energy in response to the measurement of energy input to said defibrillator.
Claim 3
Dependent Claim
28 words
The defibrillator of claim 1, further comprising selection means, coupled to said control means, for selecting one of a plurality of energy levels for discharge by said defibrillator.
Claim 4
Dependent Claim
24 words
The defibrillator of claim 2, further comprising display means for displaying a quantity representative of said one of said plurality of energy levels selected.
Claim 5
Dependent Claim
41 words
the defibrillator of claim 3, wherein said input means comprises means for incrementing and decrementing said quantity displayed in response to the measurement of energy, said control means being for controlling the discharge of energy in response to said quantity displayed.
Claim 6
Dependent Claim
36 words
The defibrillator of claim 2, wherein said control means comprises means for comparing the measurement of energy with said one of said plurality of energy levels selected and controlling the discharge of energy in response thereto.
Claim 7
Dependent Claim
19 words
The defibrillator of claim 2, further comprising means for producing the measurement of energy, coupled to said input means.
Claim 8
Dependent Claim
27 words
The defibrillator of claim 6, wherein said control means is for automatically controlling the discharge of energy at each of said plurality of levels within some tolerance.
Claim 9
Dependent Claim
25 words
The defibrillator of claim 1, wherein said input means comprises means for providing a digital quantitative representation of the measurement of energy to said defibrillator.
Claim 10
Independent Claim
44 words
A method of calibrating a defibrillator to produce a desired discharge of energy comprising the steps of: measuring a discharge of energy produced by the defibrillator; indicating to the defibrillator the discharge of energy measured; and adjusting subsequent discharge of energy in response thereto.
Claim 11
Independent Claim
44 words
A method of calibrating a defibrillator to produce a desired discharge of energy comprising the steps of: measuring a discharge of energy produced by the defibrillator; indicating to the defibrillator the discharge of energy measured; and adjusting subsequent discharge of energy in response thereto.
Claim 12
Dependent Claim
57 words
The method of claim 9, wherein the defibrillator allows one of a plurality of energy levels to be selected for discharge and wherein said step of measuring a discharge, said step of indicating to the defibrillator the discharge, and said step of adjusting subsequent discharges are each repeated for each one of said plurality of energy levels.
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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) | 1996-06-28 | 1996-12-28 | 1997-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-28 | 2000-12-28 | 2001-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-28 | 2004-12-28 | 2005-06-29 | $7700.00 | Window Closed / Lapsed |