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Glucose measurement using a current source

A glucose, constant current source technology, applied in the field of glucose quantity, can solve the problems of expensive, complicated calibration or replacement of glucose meters

Active Publication Date: 2013-10-02
MICROCHIP TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes the glucose meter more expensive, complicated and requires calibration or replacement more often than desired

Method used

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  • Glucose measurement using a current source

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Embodiment Construction

[0022] A blood glucose meter comprising a blood sample test strip, a constant current source, a precision timer, a digital processor and memory, and analog measurement circuits such as a voltage comparator, an analog-to-digital converter (ADC), which eliminates the current state of the art glucose The complex analog front end and other related circuits of the design. When a blood sample is applied to the blood sample test strip, a charge Q is generated from the reaction between the enzymes in the test strip and the blood sample. The constant current source injects a constant current value I into the charge Q on the test strip for a precise measurement time determined when excess charge Q has been removed from the blood sample test strip. The precisely measured time is measured by a precision timer. The amount of charge Q is determined by Q=I*T, which is then converted to blood glucose level for display.

[0023] The ADC samples the voltage across the blood sample test strip ...

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PUM

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Abstract

A blood glucose meter comprises a blood sample test strip, a constant current source, a precision timer, a digital processor and memory, and an analog measurement circuit, e.g., voltage comparator, analog-to-digital converter (ADC), etc., that eliminates the complex analog front end and other related circuits of present technology glucose meters. When a blood sample is applied to the blood sample test strip a charge, Q, develops from the reaction between an enzyme in the test strip and the blood sample. The constant current source injects a constant current value, 1, into the charge, Q, on the blood sample test strip over a precisely measured time determined by when the excess charge, Q, has been removed from the test strip. The amount of charge, Q, is determined by Q = I * T, the charge, Q, is then converted into a blood glucose level for display.

Description

[0001] Related Patent Applications [0002] This application asserts that James E. Bartling, Aaron Joel Mach, and Darren Edward Noel Wenn filed January 5, 2011 Priority to commonly owned U.S. Provisional Patent Application No. 61 / 430,031, entitled "Glucose Measurement Using a Current Source," which is hereby incorporated by reference for all purposes and into this article. technical field [0003] The present invention relates to blood glucose measuring apparatus, i.e., a glucose meter for measuring glucose in a blood sample, and more particularly to the use of a controlled current source, a time measuring device and a voltage comparator or analog-to-digital converter (ADC) to determine the amount of glucose in a blood sample. Background technique [0004] For diabetics, blood sugar levels need to be monitored. Blood glucose levels are measured with the aid of a blood glucose measuring device (ie, a glucose meter). The glucose meter uses a chemical reaction to generate ...

Claims

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Application Information

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IPC IPC(8): G01N27/327
CPCG01N27/3273G01N27/327G01N33/49
Inventor 詹姆斯·E·巴特林阿龙·霍埃尔·马奇达伦·爱德华·诺埃尔·文
Owner MICROCHIP TECH INC
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