Hycel, Inc.

Donald B Johnson

Howard Andrew Vick

A system for simultaneously monitoring one or a plurality of patients samples each electrocardiac waveform of each patient to generate a model waveform for each patient. The image is resolved into contour intervals, e.g. PR, QR, ST and T intervals, and the system establishes a set of interval limits for each patient to which samples of subsequently monitored waveforms are compared. Errors associated with each patient are separately stored and reported by the system in an order which may correspond to a priority ranking of the seriousness of the conditions with which the errors are associated.

Apparatus and method for reporting detected error in a cardiac signal

A fail safe detector in a cardiac monitoring system provides an alarm to indicate failure of the system to respond to cardiac waveforms supplied thereto from cardiac waveform sources. A time out circuit will produce the alarm if not periodically reset by pulses produced in response to measurement of cardiac waveforms. Means are provided for sensing whether cardiac waveforms are received from the sources to provide an alternate means of triggering periodic reset signals when no waveforms are received from the sources to prevent false alarms.

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Houston, TX, United States of America

Donald B Johnson