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Method and device and measuring member for measuring concentration of substances in liquids

A liquid sample and substance concentration technology, applied in the field of concentration devices, can solve the problems of incomplete coverage of working sensors, inaccurate results, damage to working sensors, etc.

Inactive Publication Date: 2005-03-16
INVERNESS MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the small area of ​​the active sensor section allows greater variability in calibration results
[0007] The inventors have discovered that, in addition to incomplete coverage of the working sensor portion, inaccurate results can also be caused by accidental defects in the production of the test strips for such devices and, for example, accidental damage to the working sensor portion by the user

Method used

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  • Method and device and measuring member for measuring concentration of substances in liquids
  • Method and device and measuring member for measuring concentration of substances in liquids
  • Method and device and measuring member for measuring concentration of substances in liquids

Examples

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Embodiment Construction

[0037] figure 1 Denotes a rectangular polyester strip 2 forming the base of a test strip for measuring glucose concentration in a blood sample. One base member 2 is shown in isolation, however in practice a set of such test strips could be cut from a large standard sheet at the end of manufacture.

[0038] figure 2 A carbon ink pattern applied to the base member by screen printing is shown in this example, but any suitable deposition method known in the art may be used. The carbon layer consists of 4 distinct regions that are electrically insulated from each other. At the distal end of the first track 4 an electrode 4b of the reference / counter sensor portion is formed. The track 4 extends lengthwise and forms a connection terminal 4a at its proximal end. At the distal ends of the second and third tracks 6, 8, electrodes 6b, 8b of the two working sensor parts are formed; while at their proximal ends, corresponding connection terminals 6a, 8a are formed. The 4th carbon are...

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PUM

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Abstract

In a method of measuring the concentration of a substance such as glucose in a sample liquid such as blood or interstitial fluid, a measuring device is provided having a working sensor part (6b), a second working sensor part (8b) and a reference sensor part (4b). The sample liquid is applied to the measuring device and an electric current proportional to the concentration of the substance in the sample liquid is measured at each sensor part (6b, 8b). The electric currents are compared to establish the difference. If the difference is greater than a predetermined threshold, an error indication is given. A disposable test strip with two working sensors (6b, 8b) is also disclosed.

Description

technical field [0001] This invention relates to devices for measuring the concentration of substances in liquids, and more particularly, but not exclusively, to devices and methods for measuring the concentration of glucose in blood or interstitial fluid. Background technique [0002] Devices that measure glucose levels in the blood are invaluable to diabetics, especially devices that patients can use themselves, as they can monitor their own glucose levels and administer doses of insulin accordingly. Therefore, the accuracy of this device is very important, because inaccurate readings can lead to taking the wrong dose of insulin, which can be very harmful. [0003] Also, in all practical systems for measuring glucose in blood, at least one part of the device, ie the part that comes into contact with the blood sample, is disposable. Since users typically require a large number of disposable parts, reducing the cost of single-use parts is particularly important. [0004] G...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/483A61B5/00C12Q1/00C12Q1/54G01N27/26G01N27/28G01N27/416G01N27/49G01N33/487G01N33/543G01N33/66
CPCG01N33/5438C12Q1/001C12Q1/006G01N27/3272G01N27/3271G01N33/487G01N33/49G01N33/48
Inventor O·W·H·达维斯C·P·利奇M·阿尔瓦雷茨-伊卡扎
Owner INVERNESS MEDICAL