DK0605598T3 - Fremgangsmåden ved fotometrisk in vitro bestemmelse af indholdet af en analyt i en prøve - Google Patents

Fremgangsmåden ved fotometrisk in vitro bestemmelse af indholdet af en analyt i en prøve

Info

Publication number
DK0605598T3
DK0605598T3 DK92920833.8T DK92920833T DK0605598T3 DK 0605598 T3 DK0605598 T3 DK 0605598T3 DK 92920833 T DK92920833 T DK 92920833T DK 0605598 T3 DK0605598 T3 DK 0605598T3
Authority
DK
Denmark
Prior art keywords
radiation
measuring chamber
analyte
pct
path length
Prior art date
Application number
DK92920833.8T
Other languages
English (en)
Inventor
Peter Aage Frischauf
Original Assignee
Radiometer Medical As
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 Radiometer Medical As filed Critical Radiometer Medical As
Application granted granted Critical
Publication of DK0605598T3 publication Critical patent/DK0605598T3/da

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
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/03—Cuvette constructions
    • G01N21/0303—Optical path conditioning in cuvettes, e.g. windows; adapted optical elements or systems; path modifying or adjustment
    • 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
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/03—Cuvette constructions
    • G01N2021/036—Cuvette constructions transformable, modifiable
    • 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
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/03—Cuvette constructions
    • G01N2021/0364—Cuvette constructions flexible, compressible
    • 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
    • G01N2021/3129—Determining multicomponents by multiwavelength light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
    • G01N2035/1027—General features of the devices
    • G01N2035/1048—General features of the devices using the transfer device for another function
    • G01N2035/1062—General features of the devices using the transfer device for another function for testing the liquid while it is in the transfer device
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/066—Modifiable path; multiple paths in one sample
    • G01N2201/0662—Comparing measurements on two or more paths in one sample

Landscapes

  • General Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Optical Measuring Cells (AREA)
  • Paper (AREA)
DK92920833.8T 1991-09-19 1992-09-17 Fremgangsmåden ved fotometrisk in vitro bestemmelse af indholdet af en analyt i en prøve DK0605598T3 (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK161391A DK167942B1 (da) 1991-09-19 1991-09-19 Fremgangsmaade, apparat og maalekammerenhed ved fotometrisk in vitro bestemmelse af indholdet af en analyt i en proeve ved maaling direkte paa proeven

Publications (1)

Publication Number Publication Date
DK0605598T3 true DK0605598T3 (da) 1997-12-29

Family

ID=8106547

Family Applications (2)

Application Number Title Priority Date Filing Date
DK161391A DK167942B1 (da) 1991-09-19 1991-09-19 Fremgangsmaade, apparat og maalekammerenhed ved fotometrisk in vitro bestemmelse af indholdet af en analyt i en proeve ved maaling direkte paa proeven
DK92920833.8T DK0605598T3 (da) 1991-09-19 1992-09-17 Fremgangsmåden ved fotometrisk in vitro bestemmelse af indholdet af en analyt i en prøve

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DK161391A DK167942B1 (da) 1991-09-19 1991-09-19 Fremgangsmaade, apparat og maalekammerenhed ved fotometrisk in vitro bestemmelse af indholdet af en analyt i en proeve ved maaling direkte paa proeven

Country Status (8)

Country Link
US (1) US5371020A (da)
EP (1) EP0605598B1 (da)
JP (1) JP2978565B2 (da)
AT (1) ATE156265T1 (da)
AU (1) AU2671692A (da)
DE (1) DE69221306T2 (da)
DK (2) DK167942B1 (da)
WO (1) WO1993006456A1 (da)

Families Citing this family (80)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6725072B2 (en) 1990-10-06 2004-04-20 Hema Metrics, Inc. Sensor for transcutaneous measurement of vascular access blood flow
US6246894B1 (en) 1993-02-01 2001-06-12 In-Line Diagnostics Corporation System and method for measuring blood urea nitrogen, blood osmolarity, plasma free hemoglobin and tissue water content
US5351686A (en) * 1990-10-06 1994-10-04 In-Line Diagnostics Corporation Disposable extracorporeal conduit for blood constituent monitoring
US5550630A (en) * 1993-03-19 1996-08-27 The United States Of America As Represented By The Secretary Of Agriculture Spectrophotometric method for structural analysis of organic compounds, polymers, nucleotides and peptides
DE4405375C2 (de) * 1994-02-19 1996-07-25 Fritz Nerbe Nachfolger Juergen Mikrotiterplatte
AT400639B (de) * 1994-07-18 1996-02-26 Avl Verbrennungskraft Messtech Verfahren zur bestimmung der konzentration c eines in einer trägersubstanz homogen verteilten absorbens
US5510621A (en) * 1994-10-03 1996-04-23 Optical Solutions, Inc. Apparatus and method for measuring components in a bag
DE19520446A1 (de) * 1995-06-03 1996-12-05 Boehringer Mannheim Gmbh Probenträger für die Infrarot-Transmissionsspektroskopie
DE69711177T2 (de) 1996-05-30 2002-10-10 Radiometer Medical A/S, Broenshoej System zur bestimmung mindestens eines parameters mindestens einer probe einer physiologischen flüssigkeit und kassette dafür
KR100253914B1 (ko) * 1997-12-20 2000-04-15 윤덕용 광투과경로길이조절이가능한밀폐형온라인측정장치
US6804543B2 (en) 1998-02-05 2004-10-12 Hema Metrics, Inc. Sensor for transcutaneous measurement of vascular access blood flow
US6246474B1 (en) 1998-04-29 2001-06-12 Particle Measuring Systems, Inc. Method and apparatus for measurement of particle size distribution in substantially opaque slurries
DK1078243T3 (da) * 1998-05-13 2003-11-17 Bayer Ag Optisk spektroskopiprøvecelle
NZ511560A (en) 1998-11-05 2002-11-26 Chemometec As A method for the assessment of particles and a system and a device for use in the method
US6458326B1 (en) 1999-11-24 2002-10-01 Home Diagnostics, Inc. Protective test strip platform
US6746407B2 (en) 2000-12-29 2004-06-08 Hema Metrics, Inc. Method of measuring transcutaneous access blood flow
US6525330B2 (en) 2001-02-28 2003-02-25 Home Diagnostics, Inc. Method of strip insertion detection
US6541266B2 (en) 2001-02-28 2003-04-01 Home Diagnostics, Inc. Method for determining concentration of an analyte in a test strip
US6562625B2 (en) 2001-02-28 2003-05-13 Home Diagnostics, Inc. Distinguishing test types through spectral analysis
US7016087B2 (en) * 2001-08-08 2006-03-21 Becton Dickinson And Company Photon efficient scanner
US6678542B2 (en) 2001-08-16 2004-01-13 Optiscan Biomedical Corp. Calibrator configured for use with noninvasive analyte-concentration monitor and employing traditional measurements
FR2829286B1 (fr) * 2001-09-03 2008-04-04 Ge Med Sys Global Tech Co Llc Dispositif et procede d'emission de rayons x
US6958809B2 (en) 2001-11-08 2005-10-25 Optiscan Biomedical Corporation Reagent-less whole-blood glucose meter
US7061593B2 (en) * 2001-11-08 2006-06-13 Optiscan Biomedical Corp. Device and method for in vitro determination of analyte concentrations within body fluids
US7050157B2 (en) * 2001-11-08 2006-05-23 Optiscan Biomedical Corp. Reagent-less whole-blood glucose meter
US6989891B2 (en) 2001-11-08 2006-01-24 Optiscan Biomedical Corporation Device and method for in vitro determination of analyte concentrations within body fluids
GB0223546D0 (en) * 2002-10-10 2002-11-20 Council Cent Lab Res Councils Sample cell
US20040132168A1 (en) * 2003-01-06 2004-07-08 Peter Rule Sample element for reagentless whole blood glucose meter
US6983177B2 (en) * 2003-01-06 2006-01-03 Optiscan Biomedical Corporation Layered spectroscopic sample element with microporous membrane
US20040131088A1 (en) * 2003-01-08 2004-07-08 Adtran, Inc. Shared T1/E1 signaling bit processor
US20050038674A1 (en) * 2003-04-15 2005-02-17 Braig James R. System and method for managing a chronic medical condition
US20050037384A1 (en) * 2003-04-15 2005-02-17 Braig James R. Analyte detection system
US7271912B2 (en) * 2003-04-15 2007-09-18 Optiscan Biomedical Corporation Method of determining analyte concentration in a sample using infrared transmission data
US20050106749A1 (en) * 2003-04-15 2005-05-19 Braig James R. Sample element for use in material analysis
CA2522485A1 (en) * 2003-04-15 2004-10-28 Optiscan Biomedical Corporation Dual measurement analyte detection system
JP2006523844A (ja) * 2003-04-15 2006-10-19 オプテイスカン・バイオメデイカル・コーポレーシヨン サンプル要素資格付与
ES2322855T3 (es) * 2003-10-30 2009-06-30 Bayer Healthcare Llc Formatos para analisis optico y procedimientos para fabricar los mismos.
JP2007510904A (ja) 2003-10-30 2007-04-26 バイエル・ヘルスケア・エルエルシー プラットフォーム・ウェル構造を有する光学キュベット
GB2429772B (en) * 2004-04-19 2008-11-12 Trojan Techn Inc Optical radiation sensor system and method for measuring radiation transmittance of a fluid
US20050264815A1 (en) * 2004-05-07 2005-12-01 Mark Wechsler Sample element with fringing-reduction capabilities
US7763454B2 (en) 2004-07-09 2010-07-27 Church & Dwight Co., Inc. Electronic analyte assaying device
US20060030790A1 (en) * 2004-08-06 2006-02-09 Braig James R Sample element with barrier material and vacuum
WO2006058741A1 (en) * 2004-12-02 2006-06-08 Foss Analytical A/S Spectrophotometer
DE102004059704B4 (de) * 2004-12-10 2012-07-05 Scieva Gmbh Spektroskopischer Nachweis anorganischer, organischer oder biologischer Stoffe
US20060194325A1 (en) 2005-02-14 2006-08-31 Gable Jennifer H Fluid handling cassette with a fluid control interface
US8251907B2 (en) 2005-02-14 2012-08-28 Optiscan Biomedical Corporation System and method for determining a treatment dose for a patient
US20060200070A1 (en) 2005-02-14 2006-09-07 Callicoat David N Method and apparatus for calibrating an analyte detection system with a calibration sample
US20070030482A1 (en) * 2005-08-08 2007-02-08 Zhenghua Ji Spectrophotometer with adjustable light pathlength
US9561001B2 (en) 2005-10-06 2017-02-07 Optiscan Biomedical Corporation Fluid handling cassette system for body fluid analyzer
DE102006038271A1 (de) * 2006-08-11 2008-02-14 Senslab-Gesellschaft Zur Entwicklung Und Herstellung Bioelektrochemischer Sensoren Mbh Sensorvorrichtung mit strukturierter Durchflusszelle
DE102007019695B4 (de) * 2007-04-24 2009-08-13 Analytik Jena Ag Küvette für die optische Analyse kleiner Volumina
US8597190B2 (en) 2007-05-18 2013-12-03 Optiscan Biomedical Corporation Monitoring systems and methods with fast initialization
DE202009018896U1 (de) 2008-03-21 2014-05-02 Eppendorf Ag Küvette, Einsatz, Adapter zur optischen Untersuchung kleiner Flüssigkeitsmengen
DE102008027085B4 (de) * 2008-06-05 2010-07-15 Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V. Vorrichtung zur Analyse einer flüssigen Probe sowie Verfahren zur Analytbestimmung in einem Dialysat mit einer solchen Vorrichtung
US7961310B1 (en) * 2008-07-09 2011-06-14 Durasens, LLC Transmission liquid flow cell with increased internal flow rates
US9370324B2 (en) 2008-11-05 2016-06-21 Fresenius Medical Care Holdings, Inc. Hemodialysis patient data acquisition, management and analysis system
US10475529B2 (en) 2011-07-19 2019-11-12 Optiscan Biomedical Corporation Method and apparatus for analyte measurements using calibration sets
US9554742B2 (en) 2009-07-20 2017-01-31 Optiscan Biomedical Corporation Fluid analysis system
WO2011011462A1 (en) 2009-07-20 2011-01-27 Optiscan Biomedical Corporation Adjustable connector and dead space reduction
EP3156796A1 (en) 2010-06-09 2017-04-19 Optiscan Biomedical Corporation Measuring analytes in a fluid sample drawn from a patient
US8517968B2 (en) 2011-02-25 2013-08-27 Fresenius Medical Care Holdings, Inc. Shrouded sensor clip assembly and blood chamber for an optical blood monitoring system
US9194792B2 (en) 2010-09-07 2015-11-24 Fresenius Medical Care Holdings, Inc. Blood chamber for an optical blood monitoring system
US8333724B2 (en) * 2010-09-07 2012-12-18 Fresenius Medical Care Holdings, Inc. Low flow optical blood chamber
US8743354B2 (en) 2010-09-07 2014-06-03 Fresenius Medical Care Holdings, Inc. Shrouded sensor clip assembly and blood chamber for an optical blood monitoring system
CN103347550A (zh) 2010-11-17 2013-10-09 弗雷泽纽斯医疗保健控股公司 用于光学监视系统的传感器夹组件
US9173988B2 (en) 2010-11-17 2015-11-03 Fresenius Medical Care Holdings, Inc. Sensor clip assembly for an optical monitoring system
DE102011013002C5 (de) * 2011-03-04 2020-12-17 Optek-Danulat Gmbh Durchströmbare Messzelle
EP2729784A4 (en) 2011-07-06 2015-05-13 Optiscan Biomedical Corp Measuring cell for liquid analysis system
USD725261S1 (en) 2012-02-24 2015-03-24 Fresenius Medical Care Holdings, Inc. Blood flow chamber
CN104870977B (zh) * 2012-12-20 2018-03-27 雷迪奥米特医学公司 检测样品中的组分的装置
US9562858B2 (en) * 2013-04-18 2017-02-07 Nipro Corporation Fluid concentration measuring device
EP3208603B1 (en) * 2013-05-27 2019-10-02 GasPorOx AB System and method for determining a concentration of a gas in a container
DE102013011495A1 (de) * 2013-07-02 2015-01-08 Laser- Und Medizin-Technologie Gmbh, Berlin Verfahren zur Ermittlung der Konzentration eines Stoffes in einem verformbaren Behälter
USD799031S1 (en) 2015-09-09 2017-10-03 Fresenius Medical Care Holdings, Inc. Blood flow chamber with directional arrow
EP3199937A1 (en) * 2016-01-28 2017-08-02 Minitüb GmbH Counting compartment and method for sample analysis
CA3220899A1 (en) * 2016-02-04 2017-08-10 Nova Biomedical Corporation Analyte system and method for determining hemoglobin parameters in whole blood
KR20190019051A (ko) * 2016-04-08 2019-02-26 베리파이 리미티드 분광 광도법용 샘플 용기
WO2018196937A1 (en) * 2017-04-28 2018-11-01 Q-Interline A/S A sampling pipette and cuvette, a method of carrying out spectroscopy and a device
EP3619518A4 (en) * 2017-05-02 2021-01-27 Ping Lin SAMPLE HOLDER FOR USE IN INFRARED SPECTROSCOPY
IL297609A (en) 2020-04-28 2022-12-01 Siemens Healthcare Diagnostics Inc Apparatus and methods for acoustophoretic dissolution

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3740156A (en) * 1971-08-11 1973-06-19 Exxon Research Engineering Co Photometric analyzer sampling cell
US3810695A (en) * 1972-12-14 1974-05-14 Gam Rad Fluid analyzer with variable light path
US4509522A (en) * 1981-12-15 1985-04-09 The United States Of America As Represented By The Secretary Of The Navy Infrared optical measurement of blood gas concentrations and fiber optic catheter
GB2160646B (en) * 1984-05-18 1988-05-05 Univ London Method for determining the concentration of a gas
DK282085D0 (da) * 1985-06-21 1985-06-21 Radiometer As Fremgangsmaade og apparat til bestemmelse af blodkomponenter
US4762798A (en) * 1985-12-31 1988-08-09 Marshall Diagnostics, Inc. Device and method for determining a characteristic of a fluid sample
US4800886A (en) * 1986-07-14 1989-01-31 C. R. Bard, Inc. Sensor for measuring the concentration of a gaseous component in a fluid by absorption
US4873993A (en) * 1986-07-22 1989-10-17 Personal Diagnostics, Inc. Cuvette
US4786171A (en) * 1986-07-29 1988-11-22 Guided Wave, Inc. Spectral analysis apparatus and method
DE3889733T2 (de) * 1987-07-24 1994-09-08 Terumo Corp Vorrichtung zur messung der konzentration und sauerstoffsättigung von hämoglobin.
DK163194C (da) * 1988-12-22 1992-06-22 Radiometer As Fremgangsmaade ved fotometrisk in vitro bestemmelse af en blodgasparameter i en blodproeve
DE3838371A1 (de) * 1988-11-11 1990-05-17 Hench Automatik App Masch Messzelle zur spektralanalyse von stroemenden medien, insbesondere kunststoffschmelzen
EP0401453B1 (en) * 1989-05-23 1992-09-02 Biosensors Technology, Inc. Method for determining by absorption of radiations the concentration of substances in absorbing and turbid matrices
US4980551A (en) * 1990-01-05 1990-12-25 National Research Council Canada Conseil National De Recherches Canada Non-pressure-dependancy infrared absorption spectra recording, sample cell
US5168367A (en) * 1991-01-16 1992-12-01 Rourke Patrick E O Variable path length spectrophotometric probe

Also Published As

Publication number Publication date
DE69221306T2 (de) 1998-01-08
DK161391D0 (da) 1991-09-19
JPH07500904A (ja) 1995-01-26
WO1993006456A1 (en) 1993-04-01
DE69221306D1 (de) 1997-09-04
AU2671692A (en) 1993-04-27
US5371020A (en) 1994-12-06
ATE156265T1 (de) 1997-08-15
DK161391A (da) 1993-03-20
JP2978565B2 (ja) 1999-11-15
EP0605598B1 (en) 1997-07-30
EP0605598A1 (en) 1994-07-13
DK167942B1 (da) 1994-01-03

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