Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Reexamination Certificate
2006-12-19
2006-12-19
Pezzuto, Robert E. (Department: 3766)
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
C607S028000, C600S547000
Reexamination Certificate
active
07151963
ABSTRACT:
The present invention outlines structures and methods for delivering a controllable amount of energy to a patient by automatically compensating for the load impedance detected by an implantable-cardioverter defibrillator (ICD). The invention employs high speed, switching power converter technology for the efficient generation of high energy, arbitrary waveforms. Unlike a linear amplifier, switching power converters deliver high-energy waveforms with an efficiency that is independent of the size and amplitude of the desired waveform. An ICD that uses a switching power converter to deliver the desired energy to the patient stores the energy to be delivered in a storage capacitor. The converter then transforms this energy into an arbitrarily shaped output voltage-controlled or current-controlled waveform by switching the storage capacitor in and out of the output circuit at a high rate of speed. Preferably, the waveform comprises a ramp-type waveform.
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Huang, et al. “Defibrillation Waveforms”,Nonphamacological Therapy of Arrythmias, 1998, pp. 367-383.
DeGroot Paul J.
Havel William J.
Kemmetmueller Gary
Kuehn Kevin
Sinner Thomas W.
McDowall Paul H.
Medtronic Inc.
Patel Joy
Pezzuto Robert E.
Wolde-Michael Girma
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