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Implantable bio-pressure transponder

  • US 10,244,954 B2
  • Filed: 10/28/2014
  • Issued: 04/02/2019
  • Est. Priority Date: 10/28/2013
  • Status: Active Grant
First Claim
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1. An implantable subcutaneous device to measure internal body pressure and wirelessly transmit information corresponding to the measured internal body pressure, comprising:

  • a pressure sensor configured to sense an inlet pressure of a particular region of a body of a patient via an inlet pressure port, and to sense a reference pressure of a reference chamber via a reference pressure port, wherein the pressure sensor is configured to selectively sense the inlet pressure and the reference pressure so as to compare the reference pressure to the inlet pressure to generate a calibrated inlet pressure signal;

    an encoder configured to receive the calibrated inlet pressure signal and encode the calibrated inlet pressure signal to produce a sensor information signal;

    a transceiver configured to receive the sensor information signal from the encoder and transmit the sensor information signal to an ex vivo receiver; and

    a biocompatible housing configured to enclose the pressure sensor, encoder, and transceiver, wherein;

    the encoder includes a sweep generator unit, an oscillator, and a signal delay unit, the sweep generator unit outputs a ramp signal to be compared to the calibrated inlet pressure signal, and the signal delay unit is connected to the sweep generator and the oscillator to delay starting of the oscillator and the sweep generator for a sufficient amount of time to facilitate settling of the pressure sensor.

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