BIPHASIC PULSE GENERATOR FOR AN IMPLANTABLE DEFIBRILLATOR

BIPHASIC PULSE GENERATOR FOR AN IMPLANTABLE DEFIBRILLATOR

A circuit for generating a biphasic voltage pulse to restore rhythm to a fibrillating heart, the circuit utilizing a capacitor (40) for providing the voltage pulse. The circuit further comprises first and second thyristors (34,36) to regulate the voltage and first and second electrodes (10,12) to ap...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: STANLEY M. BACH JR
Format: Patent
Sprache:eng
Schlagworte:
ELECTROTHERAPY
HUMAN NECESSITIES
HYGIENE
MAGNETOTHERAPY
MEDICAL OR VETERINARY SCIENCE
RADIATION THERAPY
ULTRASOUND THERAPY
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Beschreibung
Zusammenfassung:A circuit for generating a biphasic voltage pulse to restore rhythm to a fibrillating heart, the circuit utilizing a capacitor (40) for providing the voltage pulse. The circuit further comprises first and second thyristors (34,36) to regulate the voltage and first and second electrodes (10,12) to apply the regulated voltage to the fibrillating heart. The circuit further comprises an output sensing circuit (14) that senses the exponential decay of the capacitor (40) and signals a control circuit (16) to switch the thyristors (34,36) such that after one thyristor applies the voltage pulse to the heart in a first polarity, the other thyristor applies the voltage pulse in the opposite polarity. Therefore, substantially all energy in the capacitor (40) is provided to the heart.