Non-invasive cardiorespiratory monitor with synchronized bioimpe

Details Non-invasive cardiorespiratory monitor with synchronized bioimpe Non-invasive cardiorespiratory monitor with synchronized bioimpe

1998-02-06

2000-02-08

O'Connor, Cary

Surgery

Diagnostic testing

Cardiovascular

600533, 600536, 607 27, 607 32, A61N 500

Patent

active

060223227

ABSTRACT:
A cardiorespiratory monitor that generates bioimpedance sensing signals that produce substantially no interference with bioimpedance signals generated by implanted devices. The monitor detects the bioimpedance signal generated by the implanted device, using a voltage detector or a telemetry circuit, for example. The monitor analyzes this detected signal to generate a bioimpedance sensing signal that will not interfere with the sensed signal. For instance, if the monitor produces a pulsed sensing signal, the pulses are delivered in an interval of the detected signal where no pulses are present. Similarly, if the monitor produces a high frequency AC sensing signal, the zero crossings of the AC sensing signal are positioned during the delivery of a pulse by the implanted device.

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