Analyte sensor

  • US 8,425,416 B2
  • Filed: 03/25/2008
  • Issued: 04/23/2013
  • Est. Priority Date: 10/04/2006
  • Status: Active Grant
First Claim
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1. A system for continuous measurement of a glucose concentration, the system comprising:

  • a continuous glucose sensor comprising a first working electrode and a second working electrode, wherein the continuous glucose sensor is located at least in part in a fluid coupler configured to be in fluid communication with a vascular access device configured to be in fluid communication with a host'"'"'s circulatory system;

    a flow control device configured to intermittently meter a glucose reference solution across the continuous glucose sensor such that the continuous glucose sensor intermittently measures the glucose concentration of the reference solution, and wherein the system is configured to calibrate the continuous glucose sensor using the measured glucose concentration of the reference solution; and

    a processor module operatively connected to the continuous glucose sensor and the fluid control device, wherein the processor module is configured to use a priori information to set tolerances for at least one of sensitivity drift or baseline drift.

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