Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1995-06-01
1999-02-16
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
A61N 139
Patent
active
058715053
ABSTRACT:
A method and apparatus for generating biphasic waveforms for an implantable defibrillator uses two disparate capacitor systems. A first phase of the biphasic waveform is generated from the charge stored in a first capacitor system, and a second phase of less energy than the first phase is generated from the charge stored in a second capacitor system. By using a second capacitor system for the second phase of the biphasic waveform that stores less energy than the first capacitor system, the overall size and power requirements of the implantable device can be reduced. In a preferred embodiment, the disparate capacitor systems have different effective capacitances, with the second capacitor system preferably having a higher effective capacitance, but a lower charging voltage, than the first capacitor system.
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Adams Theodore P.
Kroll Mark W.
Kamm William E.
Pedersen Brad
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