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Methods and systems for detecting the hydration of sensors

  • US 8,591,416 B2
  • Filed: 09/21/2010
  • Issued: 11/26/2013
  • Est. Priority Date: 12/30/2005
  • Status: Active Grant
First Claim
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1. A sensor system, comprising:

  • a sensor configured to provide a sensor signal indicative of a physiological characteristic of a patient, the sensor including a plurality of electrodes that are implanted or disposed subcutaneously within the patient'"'"'s body so as to be in contact with the patient'"'"'s bodily fluids; and

    a sensor electronics device that is coupled to the sensor and includes;

    a DC source coupled to a first electrode of the plurality of electrodes and configured to supply a DC signal to said first electrode for assessing hydration of said plurality of electrodes;

    a resistance measuring device configured to measure a resistance within the sensor and to transmit a hydration signal if the resistance is below a threshold resistance;

    an electrical detection circuit that receives the hydration signal and generates an interrupt; and

    a microcontroller that receives the interrupt from the electrical detection circuit and transmits a signal representative of a voltage that is to be applied to a second electrode of the plurality of electrodes to generate said sensor signal.

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