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Method and apparatus to measure bioelectric impedance of patient tissue

  • US 8,903,484 B2
  • Filed: 03/26/2013
  • Issued: 12/02/2014
  • Est. Priority Date: 04/18/2008
  • Status: Expired due to Fees
First Claim
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1. A device for measuring an impedance of a tissue of a patient, the device comprising:

  • an adhesive patch that includes at least four electrodes configured to couple to the tissue of the patient, the at least four electrodes comprising two measurement electrodes and two drive electrodes; and

    an electronics module comprising circuitry coupled to the at least four electrodes, the circuitry including drive circuitry coupled to the two drive electrodes to pass a current through the two drive electrodes, and sensing circuitry coupled to the two measurement electrodes to measure a signal generated across the two measurement electrodes as a result of the current through the drive electrodes, and a processor programmed to receive and process the signal measured from the two measurement electrodes to determine a tissue impedance of the patient;

    wherein the adhesive patch and the electronics module are separable.

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