Lifescan Scotland Limited

Leanne Mills

Marco Fabio Cardosi

Christopher Philip Leach

Stephen Patrick Blythe

Richard Michael Day

Emma Vanessa Jayne Day

Thomas Rangi Sutton

James Iain Rodgers

Gretchen Anderson

James T Moffat

Eric Jason Bailey

Mary McEvoy

Lorraine Comstock

Nina Antonia Naylor

Arlene Thompson

Matthew Finch

Andrew Gill

Manuel Alvarez-Icaza

Selwayan Saini

Michael Patick Dolan

Chris Leach

Michael Patrick Dolan

Marco Cardosi

Thomas Sutton

James Moffat

Described and illustrated herein are one exemplary method and a measurement system having a meter and a test strip. The test strip has a first working electrode, reference electrode and second working electrode. In this method, acceptable fill data from known first current and known second current are used to predict an estimated second current at proximate the second time period (for a given batch of test strips) during the test sequence. The estimated second current at proximate the second time interval is then compared with a measured actual second current at proximate the second time interval during an actual test to determine if the measured actual second current is substantially equal to or within an acceptable percent deviation from the estimated second current so as to determine sufficient volume of a physiological fluid sample in the test strip.

Fill sufficiency method and system

The method includes: providing a test strip comprising a reference electrode and a working electrode coated with a reagent layer; applying a fluid sample to the test strip for a reaction period; applying a test voltage between the reference electrode and the working electrode; measuring a test current as a function of time; measuring a steady state current value when the test current has reached an equilibrium; calculating a ratio of the test current to the steady state current value; plotting the ratio of the test current to the steady state current value as a function of the inverse square root of time; calculating an effective diffusion coefficient from the slope of the linearly regressed plot of the ratio of the test current to the steady state current value as a function of the inverse square root of time; and calculating a hematocrit-corrected concentration of analyte.

Method for determining hematocrit corrected analyte concentrations

A method and system is provided to allow for determination of substantially Hematocrit independent analyte concentration. In one example, an analyte measurement system is provided that includes a test strip and a test meter. The test strip includes a reference electrode and a working electrode, in which the working electrode is coated with a reagent layer. The test meter includes an electronic circuit and a signal processor. The electronic circuit applies a plurality of voltages to the reference electrode and the working electrode over respective durations. The signal processor is configured to determine a substantially hematocrit-independent concentration of the analyte from a plurality of current values as measured by the processor upon application of a plurality of test voltages to the reference and working electrodes over a plurality of durations interspersed with rest voltages lower than the test voltages being applied to the electrodes.

Systems and methods for determining a substantially hematocrit independent analyte concentration

Described herein is an electrochemical enzymatic analyte test strip and method for making the test strip. The test strip utilizes isolated conductive areas inside the electrodes to define electrode whiskers. The method utilizes laser ablation to define electrode patterns.

Test strip comprising patterned electrodes

A method for determining an analyte concentration in blood is described that reduces the effects of hematocrit using a test strip attached to a test meter. The test strip includes a working electrode and a reference electrode. The test meter applies a test voltage between the working electrode and the reference electrode. After a user applies a blood sample containing an analyte onto the test strip, the test meter measures a plurality of test currents for a test time interval.

Methods for determining an analyte concentration using signal processing algorithms

Description is provided herein for an embodiment of a method determining a hematocrit-corrected glucose concentration. The exemplary method includes providing a test strip having a reference electrode and a working electrode, wherein the working electrode includes a plurality of microelectrodes and is coated with at least an enzyme and a mediator. The method can be achieved by: providing a test strip comprising a reference electrode and a working electrode formed with a plurality of microelectrodes and coated with a reagent layer; applying a fluid sample to the test strip for a reaction period; applying a test voltage between the reference electrode and the working electrode; measuring a test current as a function of time; measuring a steady state current value when the test current has reached an equilibrium; calculating a ratio of the test current to the steady state current value; plotting the ratio of the test current to the steady state current value as a function of the inverse square root of time; calculating an effective diffusion coefficient from the slope of the linearly regressed plot of the ratio of the test current to the steady state current value as a function of the inverse square root of time; and calculating a hematocrit-corrected concentration of analyte.

A system for the determination of an analyte in a bodily fluid sample includes an analytical test strip and an analytical meter. The analytical test strip has a substrate layer, an electroluminescent component (either an electroluminescent module and/or an electroluminescent lamp) disposed on the substrate layer, and a sample chamber configured for receiving a bodily fluid sample disposed above the substrate layer. Moreover, the analytical meter is configured for insertion of the analytical test strip therein and subsequent determination of the analyte.

System for determination of an analyte in a bodily fluid sample that includes an electroluminescent component

Growing community of inventors

Milton of Leys, United Kingdom

Leanne Mills