Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1993-12-10
1995-11-28
Manuel, George
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
607 14, A61N 139
Patent
active
054703417
ABSTRACT:
A battery powered cardioverter or defibrillator employing a DC-DC converter for charging high voltage output capacitors and for delivering biphasic cardioversion or defibrillation pulses through a bridge circuit including high and low side drive circuits under the control of a microprocessor controlled arrhythmia detection system. Upon the detection of an arrhythmia and the selection of cardioversion/defibrillation therapy, the charging of the high voltage output capacitors is commenced and the capacitor voltage enables a regulated voltage source for the high and low side drive circuits for the high power IGTs of each branch of the bridge circuit. High voltage switching transients are suppressed from re-triggering or otherwise affecting operation of the drive circuits. Fail safe circuitry disables operation of the drive circuits in the event that the first and second control signals are inadvertently provided simultaneously or overlap.
REFERENCES:
patent: 4800833 (1989-01-01), Winstrom
patent: 4830006 (1989-05-01), Haluska
patent: 4850357 (1989-07-01), Bach, Jr.
patent: 4953551 (1990-09-01), Mehra
patent: 4998531 (1991-03-01), Bocchi
patent: 5163427 (1992-11-01), Keimel
patent: 5178140 (1993-01-01), Ibraheim
Berg William C.
Kuehn Kevin P.
Rossing Martin A.
Duthler Reed A.
Manuel George
Medtronic Inc.
Parker Marianne
Patton Harold R.
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