# US 9,750,460 B2 · Systems and methods for replacing signal artifacts in a glucose sensor data stream > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,750,460 B2 - Document ID: US9750460B2 - Status: Granted - Kind: B2 - Application number: 15/488,190 - Filed: 2017-04-14 - Published: 2017-08-03 - Granted: 2017-09-05 - Earliest claimed: 2003-08-22 - Assignees: DexCom, Inc. - Applicants: DexCom, Inc. - Inventors: Paul V. Goode; James H. Brauker; Arpurv U. Kamath; James Patrick Thrower; Victoria Carr-Brendel - Web page: https://patentgrep.com/patent/US9750460B2 ## CPC - A61B 5/7203: {for noise prevention, reduction or removal} - A61B 5/0004: {characterised by the type of physiological signal transmitted} - A61B 5/0031: {Implanted circuitry} - A61B 5/14532: {for measuring glucose, e.g. by tissue impedance measurement} - A61B 5/14539: {for measuring pH} - A61B 5/14542: {for measuring blood gases (A61B5/14551 takes precedence)} - A61B 5/1473: invasive, e.g. introduced into the body by a catheter - A61B 5/14865: {invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors} - A61B 5/1495: Calibrating or testing of in-vivo probes - A61B 5/7257: {using Fourier transforms} - A61B 5/726: {using Wavelet transforms} - A61B 5/7278: {Artificial waveform generation or derivation, e.g. synthesizing signals from measured signals} - A61B 5/742: {using visual displays (displays for heart-related electrical signals, e.g. ECG, A61B5/339)} - A61B 5/7475: {User input or interface means, e.g. keyboard, pointing device, joystick} - A61B 5/7225: {Details of analogue processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation (input circuits for detecting, measuring, or recording bioelectric or biomagnetic signals A61B5/30; specific diagnostic methods using bioelectric or biomagnetic signals A61B5/316)} - A61B 2560/0223: of calibration, e.g. protocols for calibrating sensors - A61B 2562/0247: Pressure sensors - A61B 2562/0271: Thermal or temperature sensors - A61B 2562/08: Sensors provided with means for identification, e.g. barcodes or memory chips - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract Systems and methods for minimizing or eliminating transient non-glucose related signal noise due to non-glucose rate limiting phenomenon such as ischemia, pH changes, temperatures changes, and the like. The system monitors a data stream from a glucose sensor and detects signal artifacts that have higher amplitude than electronic or diffusion-related system noise. The system replaces some or the entire data stream continually or intermittently including signal estimation methods that particularly address transient signal artifacts. The system is also capable of detecting the severity of the signal artifacts and selectively applying one or more signal estimation algorithm factors responsive to the severity of the signal artifacts, which includes selectively applying distinct sets of parameters to a signal estimation algorithm or selectively applying distinct signal estimation algorithms. ## Claims ### Claim 1 A glucose sensor system that detects a signal artifact that can result in an erroneous glucose concentration measurement, the system comprising: an electrochemical glucose sensor comprising a plurality of electrodes and an enzyme-containing membrane, wherein the electrochemical sensor is configured to be in contact with a biological fluid; sensor electronics comprising a processor for executing a computer program code stored in a memory to cause the sensor electronics to: apply a voltage across the electrodes of the electrochemical glucose sensor, measure a signal response of the electrochemical glucose sensor responsive to the applied voltage, determine a level of severity of the signal artifact based at least in part on the measured signal response, and dynamically select an algorithm or apply a signal estimation algorithm factor based on the level of severity evaluated to generate: (i) a first glucose value for display based on the measured signal response from the electrochemical glucose sensor when the signal artifact is evaluated having a first level of severity, and (ii) a second glucose value, different from the first glucose value, for display based on the measured signal response from the electrochemical glucose sensor when the signal artifact is evaluated having a second level of severity different from the first level of severity, wherein the second level of severity is greater than the first level of severity, wherein the second glucose value is generated by applying an infinite impulse response filter, wherein the second glucose value is based at least in part on both the measured signal response and historical data; and a user interface configured to: display: (i) the first glucose value when the signal artifact is detected having the first level of severity, (ii) the second, different glucose value when the signal artifact is detected having the second level of severity, and (iii) no glucose value when the signal artifact is detected having a third level of severity, wherein the third level of severity is greater than the second level of severity. ### Claim 2 (depends on 1) The system of claim 1, wherein the biological sample is blood. ### Claim 3 (depends on 1) The system of claim 1, wherein measuring the signal response comprises measuring a current output of the electrochemical glucose sensor. ### Claim 4 (depends on 1) The system of claim 1, wherein measuring the signal response comprises measuring a voltage output of the electrochemical glucose sensor. ### Claim 5 (depends on 1) The system of claim 1, wherein the measured signal response is a voltage response of the electrochemical glucose sensor. ### Claim 6 (depends on 1) The system of claim 1, wherein determining the level of severity comprises comparing a signal content of the signal to one or more thresholds. ### Claim 7 (depends on 1) The system of claim 1, wherein the electrochemical glucose sensor is a continuous glucose sensor. ### Claim 8 (depends on 1) The system of claim 1, wherein the signal artifact is caused by a temperature associated with electrochemical glucose sensor. ### Claim 9 (depends on 1) The system of claim 1, wherein the signal artifact is associated with a local environment associated with an electrode surface. ### Claim 10 (depends on 1) The system of claim 1, wherein the signal artifact is associated with an available electrode surface area. ### Claim 11 (depends on 1) The system of claim 1, wherein the signal artifact is associated with a pressure or a stress associated with the electrochemical glucose sensor. ### Claim 12 (depends on 1) The system of claim 1, wherein the signal artifact is associated with a diffusion transport of glucose or a measured species. ### Claim 13 (depends on 1) The system of claim 1, wherein the signal artifact is associated with a biochemical species. ### Claim 14 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a biological fluid to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film, wherein the first electrode comprises an electrode surface; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is associated with at least one condition selected from the group consisting of an ischemia, a pH, a temperature associated with the electrochemical glucose sensor, a biochemical species, an available electrode surface area, a local environment associated with the electrode surface of the first electrode, a diffusion transport of glucose or a measured species, and a pressure or a stress associated with the electrochemical glucose sensor, determine a value associated with a severity of the erroneous signal, and discard a glucose measurement when the value associated with the severity of the erroneous signal is outside of a predetermined threshold value. ### Claim 15 (depends on 14) The system of claim 14, wherein the biological sample is blood. ### Claim 16 (depends on 14) The system of claim 14, wherein measuring the signal response comprises measuring a current output of the electrochemical glucose sensor. ### Claim 17 (depends on 14) The system of claim 14, wherein measuring the signal response comprises measuring a voltage output of the electrochemical glucose sensor. ### Claim 18 (depends on 14) The system of claim 14, wherein the measured signal response is a voltage response of the electrochemical glucose sensor. ### Claim 19 (depends on 14) The system of claim 14, wherein the electrochemical glucose sensor is a continuous glucose sensor. ### Claim 20 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a biological fluid to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is associated with an available electrode surface area, determine a value associated with a severity of the erroneous signal, and discard a glucose measurement when the value associated with the severity of the erroneous signal is outside of a predetermined threshold value. ### Claim 21 (depends on 20) The system of claim 20, wherein the biological sample is blood. ### Claim 22 (depends on 20) The system of claim 20, wherein measuring the signal response comprises measuring a current output of the electrochemical glucose sensor. ### Claim 23 (depends on 20) The system of claim 20, wherein measuring the signal response comprises measuring a voltage output of the electrochemical glucose sensor. ### Claim 24 (depends on 20) The system of claim 20, wherein the measured signal response is a voltage response of the electrochemical glucose sensor. ### Claim 25 (depends on 20) The system of claim 20, wherein the electrochemical glucose sensor is a continuous glucose sensor. ### Claim 26 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a biological fluid to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is caused by a temperature associated with the electrochemical glucose sensor, determine a value associated with a severity of the erroneous signal, and discard a glucose measurement when the value associated with the severity of the erroneous signal is outside of a predetermined threshold value. ### Claim 27 (depends on 26) The system of claim 26, wherein the biological sample is blood. ### Claim 28 (depends on 26) The system of claim 26, wherein measuring the signal response comprises measuring a current output of the electrochemical glucose sensor. ### Claim 29 (depends on 26) The system of claim 26, wherein measuring the signal response comprises measuring a voltage output of the electrochemical glucose sensor. ### Claim 30 (depends on 26) The system of claim 26, wherein the measured signal response is a voltage response of the electrochemical glucose sensor. ### Claim 31 (depends on 26) The system of claim 26, wherein the electrochemical glucose sensor is a continuous glucose sensor. ### Claim 32 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a biological fluid to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film, wherein the first electrode comprises an electrode surface; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is associated with a local environment associated with the electrode surface of the first electrode, determine a value associated with a severity of the erroneous signal, and discard a glucose measurement when the value associated with the severity of the erroneous signal is outside of a predetermined threshold value. ### Claim 33 (depends on 32) The system of claim 32, wherein the biological sample is blood. ### Claim 34 (depends on 32) The system of claim 32, wherein measuring the signal response comprises measuring a current output of the electrochemical glucose sensor. ### Claim 35 (depends on 32) The system of claim 32, wherein measuring the signal response comprises measuring a voltage output of the electrochemical glucose sensor. ### Claim 36 (depends on 32) The system of claim 32, wherein the measured signal response is a voltage response of the electrochemical glucose sensor. ### Claim 37 (depends on 32) The system of claim 32, wherein the electrochemical glucose sensor is a continuous glucose sensor. ### Claim 38 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a biological fluid to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is associated with a diffusion transport of glucose or a measured species, determine a value associated with a severity of the erroneous signal, and discard a glucose measurement when the value associated with the severity of the erroneous signal is outside of a predetermined threshold value. ### Claim 39 (depends on 38) The system of claim 38, wherein the biological sample is blood. ### Claim 40 (depends on 38) The system of claim 38, wherein measuring the signal response comprises measuring a current output of the electrochemical glucose sensor. ### Claim 41 (depends on 38) The system of claim 38, wherein measuring the signal response comprises measuring a voltage output of the electrochemical glucose sensor. ### Claim 42 (depends on 38) The system of claim 38, wherein the measured signal response is a voltage response of the electrochemical glucose sensor. ### Claim 43 (depends on 38) The system of claim 38, wherein the electrochemical glucose sensor is a continuous glucose sensor. ### Claim 44 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a biological fluid to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is associated with a pressure or a stress associated with the electrochemical glucose sensor, determine a value associated with a severity of the erroneous signal, and discard a glucose measurement when the value associated with the severity of the erroneous signal is outside of a predetermined threshold value. ### Claim 45 (depends on 44) The system of claim 44, wherein the biological sample is blood. ### Claim 46 (depends on 44) The system of claim 44, wherein measuring the signal response comprises measuring a current output of the electrochemical glucose sensor. ### Claim 47 (depends on 44) The system of claim 44, wherein measuring the signal response comprises measuring a voltage output of the electrochemical glucose sensor. ### Claim 48 (depends on 44) The system of claim 44, wherein the measured signal response is a voltage response of the electrochemical glucose sensor. ### Claim 49 (depends on 44) The system of claim 44, wherein the electrochemical glucose sensor is a continuous glucose sensor. ### Claim 50 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a biological fluid to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is associated with a biochemical species, determine a value associated with a severity of the erroneous signal, and discard a glucose measurement when the value associated with the severity of the erroneous signal is outside of a predetermined threshold value. ### Claim 51 (depends on 50) The system of claim 50, wherein the biological sample is blood. ### Claim 52 (depends on 50) The system of claim 50, wherein measuring the signal response comprises measuring a current output of the electrochemical glucose sensor. ### Claim 53 (depends on 50) The system of claim 50, wherein measuring the signal response comprises measuring a voltage output of the electrochemical glucose sensor. ### Claim 54 (depends on 50) The system of claim 50, wherein the measured signal response is a voltage response of the electrochemical glucose sensor. ### Claim 55 (depends on 50) The system of claim 50, wherein the electrochemical glucose sensor is a continuous glucose sensor. ### Claim 56 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a biological fluid to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is associated with an oxygen deficit, determine a value associated with a severity of the erroneous signal, and discard a glucose measurement when the value associated with the severity of the erroneous signal is outside of a predetermined threshold value. ### Claim 57 (depends on 56) The system of claim 56, wherein the biological sample is blood. ### Claim 58 (depends on 56) The system of claim 56, wherein measuring the signal response comprises measuring a current output of the electrochemical glucose sensor. ### Claim 59 (depends on 56) The system of claim 56, wherein measuring the signal response comprises measuring a voltage output of the electrochemical glucose sensor. ### Claim 60 (depends on 56) The system of claim 56, wherein the measured signal response is a voltage response of the electrochemical glucose sensor. ### Claim 61 (depends on 56) The system of claim 56, wherein the electrochemical glucose sensor is a continuous glucose sensor. ### Claim 62 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a blood sample to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film, wherein the first electrode comprises an electrode surface; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is associated with at least one condition selected from the group consisting of an ischemia, a pH, a temperature associated with the electrochemical glucose sensor, a biochemical species, an available electrode surface area, a local environment associated with the electrode surface of the first electrode, a diffusion transport of glucose or a measured species, and a pressure or a stress associated with the electrochemical glucose sensor, determine a value associated with a severity of the erroneous signal, generate a glucose value for display when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, and discard a glucose measurement when the value associated with the severity of the erroneous signal does not satisfy the predetermined threshold value; and a user interface configured to display the generated glucose value when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, wherein the user interface allows a user to toggle between a first screen, a second screen, and a third screen, wherein the first screen presents the generated glucose value in a glucose measurement trend graph extending over a first time period, wherein the second screen presents the generated glucose value in a glucose measurement trend graph extending over a second time period that is different in length from the first time period, wherein the third screen presents the generated glucose value as a numerical value, and wherein the user interface is configured to generate an alert responsive to detection of a hypoglycemic condition or a hypoglycemic condition based on the generated glucose value. ### Claim 63 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a blood sample to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is associated with an available electrode surface area, determine a value associated with a severity of the erroneous signal, generate a glucose value for display when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, and discard a glucose measurement when the value associated with the severity of the erroneous signal does not satisfy the predetermined threshold value; and a user interface configured to display the generated glucose value when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, wherein the user interface allows a user to toggle between a first screen, a second screen, and a third screen, wherein the first screen presents the generated glucose value in a glucose measurement trend graph extending over a first time period, wherein the second screen presents the generated glucose value in a glucose measurement trend graph extending over a second time period that is different in length from the first time period, wherein the third screen presents the generated glucose value as a numerical value, and wherein the user interface is configured to generate an alert responsive to detection of a hypoglycemic condition or a hypoglycemic condition based on the generated glucose value. ### Claim 64 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a blood sample to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is associated with a temperature associated with the electrochemical glucose sensor, determine a value associated with a severity of the erroneous signal, generate a glucose value for display when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, and discard a glucose measurement when the value associated with the severity of the erroneous signal does not satisfy the predetermined threshold value; and a user interface configured to display the generated glucose value when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, wherein the user interface allows a user to toggle between a first screen, a second screen, and a third screen, wherein the first screen presents the generated glucose value in a glucose measurement trend graph extending over a first time period, wherein the second screen presents the generated glucose value in a glucose measurement trend graph extending over a second time period that is different in length from the first time period, wherein the third screen presents the generated glucose value as a numerical value, and wherein the user interface is configured to generate an alert responsive to detection of a hypoglycemic condition or a hypoglycemic condition based on the generated glucose value. ### Claim 65 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a blood sample to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film, wherein the first electrode comprises an electrode surface; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is associated with a local environment associated with the electrode surface of the first electrode, determine a value associated with a severity of the erroneous signal, generate a glucose value for display when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, and discard a glucose measurement when the value associated with the severity of the erroneous signal does not satisfy the predetermined threshold value; and a user interface configured to display the generated glucose value when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, wherein the user interface allows a user to toggle between a first screen, a second screen, and a third screen, wherein the first screen presents the generated glucose value in a glucose measurement trend graph extending over a first time period, wherein the second screen presents the generated glucose value in a glucose measurement trend graph extending over a second time period that is different in length from the first time period, wherein the third screen presents the generated glucose value as a numerical value, and wherein the user interface is configured to generate an alert responsive to detection of a hypoglycemic condition or a hypoglycemic condition based on the generated glucose value. ### Claim 66 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a blood sample to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is associated with a diffusion transport of glucose or a measured species, determine a value associated with a severity of the erroneous signal, generate a glucose value for display when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, and discard a glucose measurement when the value associated with the severity of the erroneous signal does not satisfy the predetermined threshold value; and a user interface configured to display the generated glucose value when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, wherein the user interface allows a user to toggle between a first screen, a second screen, and a third screen, wherein the first screen presents the generated glucose value in a glucose measurement trend graph extending over a first time period, wherein the second screen presents the generated glucose value in a glucose measurement trend graph extending over a second time period that is different in length from the first time period, wherein the third screen presents the generated glucose value as a numerical value, and wherein the user interface is configured to generate an alert responsive to detection of a hypoglycemic condition or a hypoglycemic condition based on the generated glucose value. ### Claim 67 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a blood sample to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is associated with a pressure or a stress associated with the electrochemical glucose sensor, determine a value associated with a severity of the erroneous signal, generate a glucose value for display when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, and discard a glucose measurement when the value associated with the severity of the erroneous signal does not satisfy the predetermined threshold value; and a user interface configured to display the generated glucose value when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, wherein the user interface allows a user to toggle between a first screen, a second screen, and a third screen, wherein the first screen presents the generated glucose value in a glucose measurement trend graph extending over a first time period, wherein the second screen presents the generated glucose value in a glucose measurement trend graph extending over a second time period that is different in length from the first time period, wherein the third screen presents the generated glucose value as a numerical value, and wherein the user interface is configured to generate an alert responsive to detection of a hypoglycemic condition or a hypoglycemic condition based on the generated glucose value. ### Claim 68 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a blood sample to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is associated with a biochemical species, determine a value associated with a severity of the erroneous signal, generate a glucose value for display when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, and discard a glucose measurement when the value associated with the severity of the erroneous signal does not satisfy the predetermined threshold value; and a user interface configured to display the generated glucose value when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, wherein the user interface allows a user to toggle between a first screen, a second screen, and a third screen, wherein the first screen presents the generated glucose value in a glucose measurement trend graph extending over a first time period, wherein the second screen presents the generated glucose value in a glucose measurement trend graph extending over a second time period that is different in length from the first time period, wherein the third screen presents the generated glucose value as a numerical value, and wherein the user interface is configured to generate an alert responsive to detection of a hypoglycemic condition or a hypoglycemic condition based on the generated glucose value. ### Claim 69 A glucose sensor system, the system comprising: an electrochemical glucose sensor configured to be in contact with a blood sample to obtain a glucose measurement, wherein the electrochemical glucose sensor comprises a first electrode, a second electrode, and an enzyme-containing film; and sensor electronics comprising a processor for executing computer program code stored in a memory to cause the processor to: apply a voltage to the electrochemical glucose sensor, wherein applying the voltage comprises at least one process selected from the group consisting of switching, cycling, and pulsing a voltage applied to the electrochemical glucose sensor; measure a signal response of the electrochemical glucose sensor responsive to the applying, detect an erroneous signal based at least in part on the signal response of the electrochemical glucose sensor to the applying, wherein the erroneous signal is associated with an oxygen deficit, determine a value associated with a severity of the erroneous signal, generate a glucose value for display when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, and discard a glucose measurement when the value associated with the severity of the erroneous signal does not satisfy the predetermined threshold value; and a user interface configured to display the generated glucose value when the value associated with the severity of the erroneous signal satisfies a predetermined threshold value, wherein the user interface allows a user to toggle between a first screen, a second screen, and a third screen, wherein the first screen presents the generated glucose value in a glucose measurement trend graph extending over a first time period, wherein the second screen presents the generated glucose value in a glucose measurement trend graph extending over a second time period that is different in length from the first time period, wherein the third screen presents the generated glucose value as a numerical value, and wherein the user interface is configured to generate an alert responsive to detection of a hypoglycemic condition or a hypoglycemic condition based on the generated glucose value.