Dual electrode system for a continuous analyte sensor

Abstract

Disclosed herein are systems and methods for a continuous analyte sensor, such as a continuous glucose sensor. One such system utilizes first and second working electrodes to measure additional analyte or non-analyte related signal. Such measurements may provide a background and/or sensitivity measurement(s) for use in processing sensor data and may be used to trigger events such as digital filtering of data or suspending display of data.

What is claimed is: 
     
         1 . An analyte monitoring system, comprising:
 a sensor, comprising:
 a first sensing region configured to generate a first signal associated with a concentration of a first analyte; 
 a second sensing region configured to generate a second signal associated with a concentration of a second analyte, the second analyte being different than the first; 
 a first oxygen flux-controlling domain positioned over the first sensing region; 
 a second oxygen flux-controlling domain positioned over the formed over the second sensing region; and 
 a shared oxygen flux-controlling domain positioned over the first sensing region and the second sensing region. 
   
     
     
         2 . The system of  claim 1 , further comprising a first enzyme domain positioned on the first sensing region and a second enzyme domain positioned on the second sensing region. 
     
     
         3 . The system of  claim 2 , wherein the first enzyme domain and the second enzyme domain are each configured to generate a measurable species. 
     
     
         4 . The system of  claim 3 , wherein the measurable species comprises H 2 O 2  produced in each of the first enzyme domain and the second enzyme domain of the sensor membrane. 
     
     
         5 . The system of  claim 1 , wherein the oxygen flux-controlling domain is configured to provide a physical diffusion barrier. 
     
     
         6 . The system of  claim 5 , wherein the physical diffusion barrier is configured to physically block some crosstalk between the first sensing region and the second sensing regions. 
     
     
         7 . The system of  claim 3 , wherein the first sensing region and the second sensing region are spaced closer together than a crosstalk distance of the measurable species. 
     
     
         8 . The system of  claim 1 , wherein the first sensing region is configured to measure glucose. glucose and the second sensing region is configured to measure lactate. 
     
     
         9 . The system of  claim 1 , wherein the first sensing region is configured to measure glucose and the second sensing region is configured to measure another analyte, wherein the other analyte is not glucose. 
     
     
         10 . The system of  claim 1 , wherein the first enzyme is glucose oxidase. 
     
     
         11 . The system of  claim 1 , wherein the first analyte is glucose. 
     
     
         12 . The system of  claim 1 , wherein the second analyte comprises cholesterol, lactate, urea, bilirubin, uric acid, or creatinine. 
     
     
         13 . The system of  claim 1 , wherein the second analyte comprises triglycerides. 
     
     
         14 . The sensor of  claim 1 , wherein the first analyte is glucose and the second analyte is lactate. 
     
     
         15 . An analyte monitoring system, comprising:
 a sensor, comprising:
 a first sensing region configured to generate a first signal associated with a concentration of a first analyte; 
 a second sensing region configured to generate a second signal associated with a concentration of a second analyte, the second analyte being different than the first; and 
 a shared oxygen flux-controlling domain positioned over the first sensing region and the second sensing region. 
   
     
     
         16 . The system of  claim 15 , further comprising a first oxygen flux-controlling domain positioned over the first sensing region and a second oxygen flux-controlling domain positioned over the formed over the second sensing region. 
     
     
         17 . The system of  claim 15 , wherein the second analyte comprises cholesterol, lactate, urea, bilirubin, uric acid, or creatinine. 
     
     
         18 . The system of  claim 15 , wherein the second analyte comprises triglycerides. 
     
     
         19 . The sensor of  claim 15 , wherein the first analyte is glucose and the second analyte is lactate. 
     
     
         20 . The sensor of  claim 15 , wherein the first analyte is glucose and the second analyte is uric acid.