Surgery – Truss – Pad
Patent
1980-03-31
1981-09-22
Kamm, William E.
Surgery
Truss
Pad
A61N 136
Patent
active
042904293
ABSTRACT:
In a monitoring circuit for monitoring the state of the battery of a card pacemaker, which pacemaker includes an energy storage element normally connected to be charged by the battery and to constitute an energy source for the pacemaker components, the circuit including a voltage detector connected to emit a signal when a parameter representative of the battery state passes a threshold value, the circuit further includes: first switching member for disconnecting the battery from the energy storage element during periodically recurring time periods of given duration; a fixed load having an impedance which is large compared to the internal resistance of the battery and connected to apply to the voltage detector a voltage representative of the current flowing through the fixed load; an element for connecting the load across the battery during each time period for causing the load to be supplied with a current having a value at least indirectly defining the parameter representative of the battery state; and a storage member connected to provide an indication of the emission of such signal by the voltage detector.
REFERENCES:
patent: 3866614 (1975-02-01), Svensson
patent: 4015609 (1977-04-01), Mensinic et al.
patent: 4031899 (1977-06-01), Renirie
patent: 4124031 (1978-11-01), Mensink et al.
Biotronick Mess-und Therapiegerate GmbH & Co. Ingenieurburo Berl
Kamm William E.
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