Method and device for monitoring electrodes of electrical heart

Details Method and device for monitoring electrodes of electrical heart Method and device for monitoring electrodes of electrical heart

Filed on

1994-01-07

Date issued

1995-06-13

Examiner

Kamm, William E.

Patent Class

Surgery: light, thermal, and electrical application

SubClass

Light, thermal, and electrical application

SubSubClass

Electrical therapeutic systems

Other Related Categories

607 27, 607 62, 128734, A61N 137

Type

Patent

Status

active

Patent number

054238714

Description

ABSTRACT:
In a method for continuous, electrical monitoring of the electrodes of an electrical heart stimulator, having at least one stimulation electrode and an indifferent electrode, the inter-electrode voltage is kept constant by regulation of a very low compensating current, and the magnitude of this current is measured and monitored. A device for such electrode monitoring includes control electronics and an output stage for delivery to the stimulation electrode of stimulation pulses. The output stage is devised to supply the electrodes with a weak, continuous current, or a repeated, pulsed current, producing a net direct current, in addition to stimulation pulses. A monitoring unit senses the inter-electrode voltage and, on the basis thereof, deliver an output signal to the control electronics for the purpose of controlling the weak current so the inter-electrode voltage is kept constant at a given value. This output signal is monitored, with significant deviations thereof, or an inability to maintain the inter-electrode voltage constant indicating the presence of a fault in the electrode system.

REFERENCES:
patent: 4140131 (1979-02-01), Dutcher et al.
patent: 4719922 (1988-01-01), Padjen et al.
patent: 4785812 (1988-11-01), Pihl et al.
patent: 4805621 (1989-02-01), Heinze et al.
patent: 4899750 (1990-02-01), Ekwall
patent: 5027813 (1991-07-01), Pederson et al.
patent: 5125081 (1993-06-01), Ostroff
patent: 5179946 (1993-01-01), Weiss

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