A - Human Necessities – 61 – N
Patent
A - Human Necessities
61
N
326/1.6
A61N 1/36 (2006.01) A61B 5/0428 (2006.01) A61N 1/39 (2006.01)
Patent
CA 1104656
ABSTRACT OF THE DISCLOSURE The specification describes an improved defi- brillating and monitoring system of the type having a source of high-voltage defibrillating signals and signal monitoring means for monitoring the signals indicative of heart activity. The system includes a first electrode system for selectively applying defibrillating signals to a patient and for selectively applying monitoring signals to the means for monitoring signals, and a second electrode system for selectively applying monitoring signals to the means for monitoring signals. The means for monitoring signals includes a first isolation amplifier. A switch selectively applies monitoring signals to the first isolation amplifier alter- natively from the first electrode system or from the second electrode system. The improvement comprises a second isolation amplifier coupled intermediate the first electrode system and the switch means whereby to prevent current leakage between the first electrode system and the second electrode system. This is particularly desirable in those defibrillating and monitoring systems which are battery powered and have a floating ground, rather than an intentional direct connection to actual ground or earth potential.
303567
American Optical Corporation
Macrae & Co.
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