Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1997-03-05
1999-02-23
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
607 7, A61N 139
Patent
active
058738932
ABSTRACT:
An external defibrillator with a microprocessor for testing the integrity of an output circuit prior to and during the delivery of a multiphasic defibrillation pulse from an energy storage capacitor coupled to the output circuit is disclosed. The output circuit contains a plurality of switches. The integrity of the output circuit and the output switches is determined by selectively monitoring the changes in the voltage level on the energy storage capacitor while certain tests or functions are being performed. A scaling circuit steps down the voltage level of the high-energy storage device so that it can be measured and monitored by the microprocessor. The microprocessor may compensate for the failure of an output switch by locating a usable set of output switches and using them to provide a discharge path through the output circuit for application of a monophasic pulse.
REFERENCES:
patent: 4800883 (1989-01-01), Winstrom
patent: 4821723 (1989-04-01), Baker, Jr. et al.
patent: 4850357 (1989-07-01), Bach, Jr.
patent: 5083562 (1992-01-01), de Coriolis et al.
patent: 5099844 (1992-03-01), Faupel
patent: 5431684 (1995-07-01), Archer et al.
patent: 5431686 (1995-07-01), Kroll et al.
patent: 5441518 (1995-08-01), Adams et al.
patent: 5468254 (1995-11-01), Hahn et al.
patent: 5470341 (1995-11-01), Kuehn et al.
patent: 5489293 (1996-02-01), Pless et al.
patent: 5591213 (1997-01-01), Morgan
patent: 5593427 (1997-01-01), Gliner et al.
patent: 5601612 (1997-02-01), Gliner et al.
patent: 5607454 (1997-03-01), Cameron et al.
patent: 5733310 (1998-03-01), Lopin et al.
Gust H. Brady et al., "Multicenter Comparison of Truncated Biphasic Shocks and Standard Damped Sine Wave Monophasic Shocks for Transthoracic Ventricular Defibrillation," Circulation, vol. 94, No. 10, Nov. 15, 1996, pp. 2507-2514.
Gust H. Brady et al., "Truncated Biphasic Pulses for Transthoracic Defibrillation, " Circulation, vol. 91, No. 6, Mar. 15, 1995, pp. 1768-1774.
Richard O. Cummins, M.D., et al., Overview, "Ventricular Fibrillation, Automatic External Defibrillators, and the United States Food and Drug Administration: Confrontation Without Comprehension," Annals of Emergency Medicine, vol. 26, Nov. 1995, p. 621.
Scott A. Feeser, M.D. et al., Abstract, "Strength-Duration and Probability of Success Curves for Defibrillation with Biphasic Waveforms," Circulation, vol. 82, 1990, pp. 2128-2141.
Bradford E. Gliner et al., "Transthoracic Defibrillation of Swine with Monophasic and Biphasic Waveforms," Circulation, vol. 92, No. 6, Sep. 15, 1995, pp. 1634-1643.
Mark W. Kroll, "A Minimal Model of the Single Capacitor Biphasic Defibrillation Waveform," PACE, vol. 17, Nov. 1994, Part I, pp. 1782-1792.
Anthony S.L. Tang, M.D. et al., Abstract, "Ventricular Defibrillation Using Biphasic Waveforms: The Importance of Phasic Duration," Journal of American College of Cardiology, vol. 13, 1989, pp. 207-214.
Gregory P. Walcott et al., "Choosing the Optimal Monophasic and Biphasic Waveforms for Ventricular Defibrillation," Journal of Cardiovascular Electrophysiology, vol. 6, No. 9, Sep. 1995, pp. 737-750.
Borschowa Lawrence A.
Nova Richard C.
Sullivan Joseph L.
Kamm William E.
Layno Carl H.
Physio-Control Corporation
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