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This paper reports on the coupling of ultrasonically guided cardiac probes with wireless transmission of cardiac action potentials for applications in monitoring the 3D electrical onset of ventricular fibrillation. An application specific integrated circuit has been designed with a 40 dB amplifying stage and a frequency modulating oscillator to wirelessly transmit the recorded action potentials. Combined...
We report on a microfabricated silicon ultrasonic horn-driven microprobes with polysilicon strain-gauges and integrated Pt-based immersion depth sensors for fluid viscosity measurement. Non-linear flexural vibration induced in the microprobes by the silicon horn actuated at its longitudinal resonance, is monitored and its damping is used to estimate fluid viscosity. Vibration damping in ethylene glycol...
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