Leakage current blocking circuit

Details Leakage current blocking circuit Leakage current blocking circuit

1994-04-28

1995-12-05

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

607 63, A61N 139

Patent

active

054724546

ABSTRACT:
A defibrillator circuit that uses one or more self-switching switches to prevent the flow of leakage current through a patient's heart is provided. When the voltage across a self-switching switch is below a predetermined threshold the self-switching switch is open, which directs leakage current through a bypass resistor rather than the patient's heart. When a defibrillation pulse is generated the voltage across the self-switching switch rises above the predetermined threshold of the self-switching switch, which turns on the self-switching switch and allows the defibrillation pulse to be applied to the patient's heart. A monophasic defibrillator operates with one self-switching switch and one bypass resistor. Two sets of self-switching switches and bypass resistors are used in a biphasic defibrillator.

REFERENCES:
patent: 4566457 (1986-01-01), Stemple
patent: 4595009 (1986-06-01), Leinders
patent: 5405361 (1995-04-01), Persson

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