EP1583841A1 - Dispositif et procede - Google Patents

Dispositif et procede

Info

Publication number
EP1583841A1
EP1583841A1 EP04701626A EP04701626A EP1583841A1 EP 1583841 A1 EP1583841 A1 EP 1583841A1 EP 04701626 A EP04701626 A EP 04701626A EP 04701626 A EP04701626 A EP 04701626A EP 1583841 A1 EP1583841 A1 EP 1583841A1
Authority
EP
European Patent Office
Prior art keywords
optical wavelength
optical
analyte concentration
reflectance
source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP04701626A
Other languages
German (de)
English (en)
Inventor
Gabor Tajnafoi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arkray Factory Ltd
Original Assignee
Hypoguard UK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hypoguard UK Ltd filed Critical Hypoguard UK Ltd
Publication of EP1583841A1 publication Critical patent/EP1583841A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths

Definitions

  • the user When operating a meter according to the present invention in the in-dosage application, the user inserts the strip into the device, causing the meter to turn on. When the timer elapses the reflectance will be measured at the two different wavelengths. (If the light source comprises two LEDs, then it may not be possible to measure the reflectance values at both wavelengths at the same time, and thus the reflectance values can be calculated from a sequence of measurements (this assumes that when the reaction is complete any change in colour will be very slight and can be calculated using a linear approximation) .
  • the optical source 30 may comprise a white light source, or another wideband source that comprises the optical wavelengths of interest, as opposed to a discrete optical source for each wavelength of interest.
  • the optical detector 40 may be a wide band detector from which the wavelengths of interest can be extracted, or a discrete optical detector can be provided of the wavelengths of interest, with each detector having a band pass filter centred upon the respective wavelength of interest.
  • the T transformation which is dependent upon the design of the meter, will determine the performance of the meter. For optimum meter performance the meter will provide accurate repeatable measurements (that is, the ratio of rCV to cCV is constant) across the range of concentration values that are of interest .
  • the performance characterisation used to estimate the calibration curve is thus very important, may be described by

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Abstract

La présente invention concerne un dispositif de test diagnostique qui mesure le facteur de réflexion à deux longueurs d'ondes différentes afin de déterminer le changement de couleur d'une ou plusieurs substances chimiques, le changement de couleur étant fonction de la concentration d'un analyte dans un prélèvement de liquide appliqué sur les substances chimiques. La concentration de l'analyte peut être déterminée à partir du rapport entre les valeurs du facteur de réflexion aux deux longueurs d'ondes différentes. Dans un autre mode de réalisation, la ou les sources optiques et le détecteur optique sont agencés de façon qu'ils se trouvent dans le même axe optique. Cet agencement permet d'obtenir un dispositif de test plus efficace.
EP04701626A 2003-01-14 2004-01-13 Dispositif et procede Ceased EP1583841A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0300764 2003-01-14
GB0300764A GB2397375A (en) 2003-01-14 2003-01-14 Measuring analyte concentration in a fluid sample by illuminating the sample at two wavelengths
PCT/GB2004/000055 WO2004063393A1 (fr) 2003-01-14 2004-01-13 Dispositif et procede

Publications (1)

Publication Number Publication Date
EP1583841A1 true EP1583841A1 (fr) 2005-10-12

Family

ID=9951088

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04701626A Ceased EP1583841A1 (fr) 2003-01-14 2004-01-13 Dispositif et procede

Country Status (3)

Country Link
EP (1) EP1583841A1 (fr)
GB (1) GB2397375A (fr)
WO (1) WO2004063393A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102439422B (zh) * 2009-03-30 2016-05-18 3M创新有限公司 用于检测被分析物的光电方法和装置
KR101765972B1 (ko) * 2010-04-02 2017-08-07 쓰리엠 이노베이티브 프로퍼티즈 컴파니 분석물 센서 광학 판독기를 위한 정렬 정합 특징부
US8580576B2 (en) 2011-08-04 2013-11-12 Cilag Gmbh International Method for bodily fluid sample transfer during analyte determination
EP3150996A1 (fr) 2015-10-02 2017-04-05 Hach Company Appareil et procédé pour la détermination de la valeur de la dureté de l'eau
US10765793B1 (en) * 2019-06-27 2020-09-08 Fresenius Medical Care Holdings, Inc. Ammonia detection in dialysis systems

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59779B2 (ja) * 1977-01-20 1984-01-09 株式会社京都第一科学 尿等の分析方法
US5049487A (en) * 1986-08-13 1991-09-17 Lifescan, Inc. Automated initiation of timing of reflectance readings
US4935346A (en) * 1986-08-13 1990-06-19 Lifescan, Inc. Minimum procedure system for the determination of analytes
US5059394A (en) * 1986-08-13 1991-10-22 Lifescan, Inc. Analytical device for the automated determination of analytes in fluids
DE3889733T2 (de) * 1987-07-24 1994-09-08 Terumo Corp Vorrichtung zur messung der konzentration und sauerstoffsättigung von hämoglobin.
US5239180A (en) * 1990-02-02 1993-08-24 Boston Advnaced Technologies, Inc. Laser systems for food analysis based on reflectance ratio detection
JP3021167B2 (ja) * 1992-01-30 2000-03-15 テルモ株式会社 分析装置
IL120587A (en) * 1996-04-04 2000-10-31 Lifescan Inc Reagent test strip for determination of blood glucose
AT404513B (de) * 1996-07-12 1998-12-28 Avl Verbrennungskraft Messtech Verfahren und messanordnung zur optischen bestimmung der totalen hämoglobinkonzentration
WO1999017117A1 (fr) * 1997-09-30 1999-04-08 Amira Medical Dispositif d'analyse pourvu d'un support capillaire pour reactifs
US7577469B1 (en) * 1999-03-11 2009-08-18 Jack L. Aronowitz Noninvasive transdermal systems for detecting an analyte in a biological fluid and methods
US6284142B1 (en) * 1999-09-03 2001-09-04 Baxter International Inc. Sensing systems and methods for differentiating between different cellular blood species during extracorporeal blood separation or processing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004063393A1 *

Also Published As

Publication number Publication date
GB0300764D0 (en) 2003-02-12
WO2004063393A1 (fr) 2004-07-29
GB2397375A (en) 2004-07-21

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