DE102008027085A1 - Device for analysis of liquid sample, has radiation source, flexible measuring cell, in which sample is introduced, radiation detector and evaluation unit - Google Patents
Device for analysis of liquid sample, has radiation source, flexible measuring cell, in which sample is introduced, radiation detector and evaluation unit Download PDFInfo
- Publication number
- DE102008027085A1 DE102008027085A1 DE102008027085A DE102008027085A DE102008027085A1 DE 102008027085 A1 DE102008027085 A1 DE 102008027085A1 DE 102008027085 A DE102008027085 A DE 102008027085A DE 102008027085 A DE102008027085 A DE 102008027085A DE 102008027085 A1 DE102008027085 A1 DE 102008027085A1
- Authority
- DE
- Germany
- Prior art keywords
- measuring cell
- sample
- films
- measuring
- radiation 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.)
- Granted
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 27
- 238000011156 evaluation Methods 0.000 title claims abstract description 6
- 239000007788 liquid Substances 0.000 title claims description 6
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000012491 analyte Substances 0.000 claims abstract description 8
- -1 polyethylene Polymers 0.000 claims abstract description 8
- 239000004698 Polyethylene Substances 0.000 claims abstract description 4
- 229920000573 polyethylene Polymers 0.000 claims abstract description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 3
- 239000003550 marker Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000011888 foil Substances 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims description 2
- 238000000502 dialysis Methods 0.000 claims description 2
- 230000003204 osmotic effect Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 238000012417 linear regression Methods 0.000 claims 1
- 210000004027 cell Anatomy 0.000 description 41
- 239000000523 sample Substances 0.000 description 17
- 239000008280 blood Substances 0.000 description 13
- 210000004369 blood Anatomy 0.000 description 13
- NOESYZHRGYRDHS-UHFFFAOYSA-N insulin Chemical compound N1C(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(NC(=O)CN)C(C)CC)CSSCC(C(NC(CO)C(=O)NC(CC(C)C)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CCC(N)=O)C(=O)NC(CC(C)C)C(=O)NC(CCC(O)=O)C(=O)NC(CC(N)=O)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CSSCC(NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2C=CC(O)=CC=2)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2NC=NC=2)NC(=O)C(CO)NC(=O)CNC2=O)C(=O)NCC(=O)NC(CCC(O)=O)C(=O)NC(CCCNC(N)=N)C(=O)NCC(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC(O)=CC=3)C(=O)NC(C(C)O)C(=O)N3C(CCC3)C(=O)NC(CCCCN)C(=O)NC(C)C(O)=O)C(=O)NC(CC(N)=O)C(O)=O)=O)NC(=O)C(C(C)CC)NC(=O)C(CO)NC(=O)C(C(C)O)NC(=O)C1CSSCC2NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(N)CC=1C=CC=CC=1)C(C)C)CC1=CN=CN1 NOESYZHRGYRDHS-UHFFFAOYSA-N 0.000 description 12
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 7
- 239000008103 glucose Substances 0.000 description 7
- 102000004877 Insulin Human genes 0.000 description 6
- 108090001061 Insulin Proteins 0.000 description 6
- 229940125396 insulin Drugs 0.000 description 6
- 239000012088 reference solution Substances 0.000 description 5
- 206010012601 diabetes mellitus Diseases 0.000 description 4
- 210000001124 body fluid Anatomy 0.000 description 3
- 239000010839 body fluid Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 210000003722 extracellular fluid Anatomy 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000012488 sample solution Substances 0.000 description 3
- 229910000639 Spring steel Inorganic materials 0.000 description 2
- 230000009102 absorption Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 206010033675 panniculitis Diseases 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000007920 subcutaneous administration Methods 0.000 description 2
- 210000004003 subcutaneous fat Anatomy 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 208000028399 Critical Illness Diseases 0.000 description 1
- 208000013016 Hypoglycemia Diseases 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 206010067584 Type 1 diabetes mellitus Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 210000000577 adipose tissue Anatomy 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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
-
- 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
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3577—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing liquids, e.g. polluted water
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/05—Flow-through cuvettes
-
- 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
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
- G01N21/274—Calibration, base line adjustment, drift correction
-
- 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
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
-
- 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
- G01N2201/12—Circuits of general importance; Signal processing
- G01N2201/129—Using chemometrical methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/327—Biochemical electrodes, e.g. electrical or mechanical details for in vitro measurements
- G01N27/3271—Amperometric enzyme electrodes for analytes in body fluids, e.g. glucose in blood
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zur Analyse einer flüssigen Probe mit wenigstens einer Strahlungsquelle, einer flexiblen Messzelle, in welche die Probe eingeleitet wird, wenigstens einem Strahlungsdetektor und einer Auswerteeinheit, wobei die Probenschichtdicke in der flexiblen Messzelle zur Durchführung einer Referenzmessung veränderbar ist.The The invention relates to a device for analyzing a liquid Sample with at least one radiation source, a flexible measuring cell, into which the sample is introduced, at least one radiation detector and an evaluation unit, wherein the sample layer thickness in the flexible Measuring cell for performing a reference measurement is variable.
Ferner betrifft die Erfindung ein Verfahren zur Analytbestimmung in einem Dialysat in einer solchen Vorrichtung.Further The invention relates to a method for determining analytes in one Dialysate in such a device.
Spektrometrische Messsysteme sind im Bereich der kontinuierlichen Prozessmesstechnik etabliert. Für den Bereich der Patientenselbstkontrolle bzw. der Point-of-Care Diagnostik im Krankenhaus sind solche reagenzfreien Messverfahren, die nur geringen Kalibrieraufwand mit sich bringen, ebenfalls wünschenswert.spectrometric Measuring systems are in the field of continuous process measuring technology established. For the area of patient self-monitoring or The point-of-care diagnostics in the hospital are such reagent-free Measuring methods that involve only a small calibration effort, also desirable.
Insulinabhängige Diabetiker (Typ I) leiden unter einer verminderten bzw. im späteren Zustand der Krankheit nicht vorhandenen Insulinproduktion, die zur Entgleisung des Blutzuckerspiegels führt. Mittels Insulinpumpen können für die Grundversorgung der Typ I Diabetiker kontinuierlich kleinere Mengen an Insulin ins subkutane Fettgewebe der Patienten gespritzt werden. Ähnliche Stoffwechselentgleisungen sind ebenfalls bei kritisch-kranken Patienten auf Intensivstationen bekannt, ohne dass eine Diabetes-Erkrankung vorher diagnostiziert wurde. Eine Normalisierung der Blutzuckerwerte mittels Insulininfusion führt nachweislich zu einer Reduzierung der Sterblichkeitsrate dieser Patientengruppe.insulin-dependent Diabetics (type I) suffer from a diminished or later State of the disease does not exist insulin production, which leads to Derailment of blood sugar levels leads. By means of insulin pumps can for the primary care of type I diabetics continuously smaller amounts of insulin into subcutaneous adipose tissue the patients are injected. Similar metabolic lapses are also in critically ill patients in intensive care units known without being diagnosed with diabetes before has been. A normalization of blood glucose levels using insulin infusion demonstrably leads to a reduction in the mortality rate this patient group.
Die
im subkutanen Fettgewebe vorliegende interstitielle Flüssigkeit
folgt in der Regel mit einer geringen Zeitverzögerung – abhängig
vom gewählten Gewebe – dem Konzentrationsprofil
des Blutzuckers. Durch die Bestimmung dieser Glucosewerte ist es möglich,
einen geschlossenen Regelkreis (Closed Loop-System) herzustellen,
der dazu beiträgt, die Blutzuckerkonzentration im Körper
möglichst selbstständig zu stabilisieren. Die
Firma Abbott GmbH & Co.
KG vertreibt ein kontinuierliches Glucosemesssystem (
Im Mai 2007 präsentierte das Unternehmen Medtronic auf der Fachtagung der Deutschen Diabetesgesellschaft das Paradigm Real-Time System. Bereits einige Zeit vorher hat Medtronic den Guardian Biosensor zur kontinuierlichen Blutzuckermessung auf den Markt gebracht. Die Messfunktionen dieses Sensors können auch von den beiden Insulinpumpen Paradigm 522 und 722 übernommen werden, so dass kein zweites Gerät notwendig ist. Jedoch sind unverändert zwei Katheter erforderlich, einer für das Insulin, wie gehabt mit Schlauch, und einer für die Blutglucosemessung durch den sogenannten Softsensor für die Weitergabe der gemessenen Werte an die Pumpe. Beide invasiven Systeme müssen alle drei Tage gewechselt werden. Es wird empfohlen, trotz der Verwendung des Real Time-Systems weiterhin auf die klassische Art der Blutzuckerbestimmung zurückzugreifen. Dies empfiehlt der Hersteller Medtronic, da die kontinuierliche Messung nur eine Ergänzung zur Blutzuckerselbstkontrolle sei und außerdem mindestens alle 12 Stunden eine Kalibrierung des Systems anhand eines mit herkömmlichen Teststreifen bestimmten Blut zuckerwertes erforderlich sei. Dieses System ist somit für den Diabetiker mit höherem Aufwand (neben Katheter noch ein weiterer Sensor, häufige Kalibration usw.) und höheren Kosten verbunden.in the May 2007, the company presented Medtronic at the Symposium of the German Diabetes Society the Paradigm Real-Time System. Already some time before, Medtronic has the Guardian Biosensor marketed for continuous blood glucose monitoring. The Measuring functions of this sensor can also be of the two Insulin pumps Paradigm 522 and 722 are adopted, so that no second device is necessary. However, they are unchanged two catheters are required, one for the insulin, like had with tube, and one for the blood glucose measurement through the so-called soft sensor for the passing of measured values to the pump. Both invasive systems need be changed every three days. It is recommended, despite the use of the real-time system continues on the classic way of measuring blood sugar recourse. This is recommended by the manufacturer Medtronic, because the continuous measurement is only an adjunct to blood glucose self-monitoring and at least every 12 hours a calibration of the system using a conventional test strip certain blood sugar levels are required. This system is thus for the diabetiker with higher expenditure (beside Catheter yet another sensor, frequent calibration etc.) and higher costs.
Die bekannten Systeme mit elektrochemischen Biosensoren und der Notwendigkeit einer häufigen Nachkalibrierung sind somit noch nicht zufriedenstellend. Diese Nachteile sind durch den Einsatz photometrischer Messsysteme, speziell unter der Verwendung komplett reagenzfreier infrarot-spektrometrischer Verfahren nicht gegeben.The known systems with electrochemical biosensors and the need Frequent recalibration is thus not yet satisfactory. These disadvantages are due to the use of photometric measuring systems, specifically using completely reagent-free infrared spectrometry Procedure not given.
Aus
Aus
der
Aufgabe der Erfindung ist es, eine Lösung zu schaffen, mit welcher zuverlässige Messungen in Einstrahlanordnung ohne die Notwendigkeit einer Referenzmessung mit einer Referenzlösung anwenderfreundlich möglich sind.task The invention is to provide a solution with which reliable measurements in Einstrahlanordnung without the need a reference measurement with a reference solution user-friendly possible are.
Diese Aufgabe wird mit einer Vorrichtung der eingangs bezeichneten Art erfindungsgemäß dadurch gelöst, dass die mit der Probe in Berührung kommenden Wandungen der Messzelle von austauschbaren Folien gebildet sind.These Task is with a device of the type described solved according to the invention that the walls coming into contact with the sample Measuring cell are formed by exchangeable films.
Durch diese Gestaltung der Vorrichtung entfällt die Notwendigkeit, die mit der zu analysierenden flüssigen Probe, beispielsweise dem Dialysat, in Verbindung kommenden Sensorteile zu desinfizieren, es müssen lediglich die betreffenden Folien ausgetauscht werden, was auf einfache Weise möglich ist. Mit einer sogenannten Einstrahlanordnung wird erreicht, dass bei der für Proben- und Referenzmessungen die gleiche/en Strahlungsquelle/Strahlungsquellen und Detektor/Detektoren verwendet werden und die gleichen optischen Elemente durchstrahlt werden, um beste optische Kompensation der Einflüsse von Messgerätebauteilen außer der Probe zu gewährleisten.By this design of the device eliminates the need with the liquid sample to be analyzed, for example the dialysate to disinfect associated sensor parts, it only needs to be replaced the relevant slides become what is easily possible. With a so-called Einstrahlanordnung is achieved that in the sample for and reference measurements the same radiation source (s) and detector / detectors are used and the same optical Elements are irradiated to best optical compensation of the Influences of meter components except to ensure the sample.
Dies lässt sich handhabungsfreundlich besonders bevorzugt dadurch erreichen, dass die Innenseite der Messzelle zwei Folien aufweist, die außenrandseitig an einem Trägerelement dicht befestigt sind.This can be handling friendly especially preferred achieve that the inside of the measuring cell has two foils, the outside edge side of a support element tight are attached.
Dazu können nach einer ersten Variante die Folien am Trägerelement mittels eines innen- und eines außenseitigen Spannringes festgeklemmt sein.To According to a first variant, the films on the carrier element by means of an inner and an outer clamping ring be clamped.
Alternativ können die beiden Folien an das Trägerelement angeschweißt oder angeklebt sein.alternative Both films can be attached to the carrier element welded or glued.
Bevorzugt ist vorgesehen, dass in das Trägerelement eine Zu- und Ableitung für die Probe integriert ist.Prefers is provided that in the support element an inlet and Derivative for the sample is integrated.
Das Trägerelement kann grundsätzlich eine beliebige geometrische Form aufweisen, vorzugsweise ist es aber ringförmig ausgebildet.The Carrier element can basically any have geometric shape, but preferably it is annular educated.
Besonders bevorzugt ist vorgesehen, dass die Folien aus Polyethylen oder Polytetrafluorethylen bestehen.Especially it is preferably provided that the films consist of polyethylene or polytetrafluoroethylene.
Die Folien weisen bevorzugt eine Wandstärke von 0,1 bis 300 μm, vorzugsweise 3 bis 10 μm, auf.The Foils preferably have a wall thickness of 0.1 to 300 μm, preferably 3 to 10 microns, on.
In weiterer bevorzugter Ausgestaltung ist vorgesehen, dass der Messzelleninnenraum der flexiblen Messzelle zwischen zwei im Strahlengang der wenigstens einen Strahlungsquelle angeordneten, für die Messaufgabe transparenten Messküvettenfenstern ausgebildet ist und die Folien durch Druckerhöhung in der Messzelle gegen die Messküvettenfenster andrückbar sind. Es ist dadurch auf einfache Weise gewährleistet, dass die Folien an den Messküvettenfenstern anliegen und somit vorher festgelegte Probenschichtdicken zur reproduzierbaren Photometrie vorliegen. Ein weiterer Vorteil ist die geringe Dicke der Folien, wodurch nur geringe Strahlungsab sorptionen im infraroten Spektralbereich die Folge sind, die die photometrische Messaufgabe nicht beeinträchtigen. Statt der planparallelen Küvettenfenster, an denen die Folie anliegt, können diese auch z. B. als plan-konvexe optische Elemente (Linsen) gestaltet sein.In Another preferred embodiment is provided that the measuring cell interior the flexible measuring cell between two in the beam path of at least arranged a radiation source, for the measuring task transparent measuring cell windows is formed and the films by increasing the pressure in the measuring cell against the Measuring cuvette window are pressed. It is through in a simple way ensures that the slides to the Measuring cell windows abut and thus predetermined sample layer thicknesses for reproducible photometry. Another advantage is the small thickness of the films, which sorption only small Strahlungsab in the infrared spectral range are the consequence of the photometric Do not interfere with the measuring task. Instead of the plane-parallel Cuvette window on which the film is applied, can these also z. B. designed as a plano-convex optical elements (lenses) be.
Besonders bevorzugt ist vorgesehen, dass der Abstand der beiden Messküvettenfenster veränderbar ist. Dazu ist bevorzugt wenigstens ein Messküvettenfenster mechanisch oder elektromechanisch verstellbar. Durch diese Gestaltung ist auf besonders einfache Weise eine Referenzmessung durchführbar. Dazu wird für die Referenzmessung die zwischen den Folien liegende Probenlösungsschicht durch eine mechanische Bewegung wenigstens eines Messküvettenfensters vorab verdrängt. Nach der Referenzmessung wird der Probenraum wieder geöffnet und die unter Druck stehende Probenlösung bewirkt ein erneutes Befüllen des Probenraumes.Especially It is preferably provided that the distance between the two measuring cuvette windows is changeable. For this purpose, at least one measuring cell window is preferred mechanically or electromechanically adjustable. Through this design is a reference measurement feasible in a particularly simple manner. This is for the reference measurement between the slides lying sample solution layer by a mechanical movement at least one measuring cell window displaced in advance. After the reference measurement, the sample chamber is opened again and the pressurized sample solution causes a renewed Filling the sample space.
Die Erfindung sieht auch ein Verfahren zur Analytbestimmung in einem Dialysat allgemein von Bioflüssigkeiten und speziell von Körperflüssigkeiten, wie der interstitiellen Flüssigkeit oder von Vollblut, mit einer vorbeschriebenen Vorrichtung vor, welches sich dadurch auszeichnet, dass die analytkonzentrationsabhängigen Signale mittels einer multivariaten Messung bei mindestens zwei Wellenlängen aufgenommen und von einer Auswerteeinheit mit hinterlegten Signalen verglichen werden, um die jeweiligen Analytkonzentrationen zu ermitteln und auszugeben.The The invention also provides a method for determining analytes in a Dialysate in general of biofluids and especially of Body fluids, such as the interstitial fluid or of whole blood, with a device described above, which itself characterized in that the analyte concentration dependent Signals by means of a multivariate measurement at least two Wavelengths recorded and from an evaluation unit be compared with stored signals to the respective analyte concentrations to determine and issue.
In bevorzugter Ausgestaltung ist vorgesehen, dass mindestens eine Komponente des Perfusates (Markersubstanz) quantitativ mitbestimmt wird, um hiermit über die osmotischen Verluste der Markersubstanz beim Dialyseprozess die variablen und individuellen Wiederfindungsraten für die jeweiligen Analyten im Dialysat zu bestimmen, worüber die Konzentration der Ana lyten in der dialysierten, ursprünglich vorliegenden Körperflüssigkeit (Beispiele sind, wie schon erwähnt, die im subkutanen Fettgewebe befindliche interstitielle Flüssigkeit oder Vollblut) ermittelt werden können. Im Allgemeinen sind hier nicht-lineare funktionelle Abhängigkeiten zu berücksichtigen.In a preferred embodiment, it is provided that at least one component of the perfusate (marker substance) is quantitatively co-determined in order thereby to control the osmotic losses of the Marker substance in the dialysis process to determine the variable and individual recovery rates for the respective analytes in the dialysate, about which the concentration of the analytes in the dialyzed, originally present body fluid (examples are, as already mentioned, located in the subcutaneous fatty tissue interstitial fluid or whole blood) are determined can. In general, non-linear functional dependencies should be considered here.
Ferner ist vorgesehen, dass zur Berechnung der Analyt- und Markersubstanzkonzentrationen im Dialysat multivariate Kalibrierverfahren, wie klassische Anpassungsverfahren mit hinterlegten Signalen unter Minimierung der Summe der spektralen Abweichungsquadrate (Least Squares Verfahren), multiple lineare Regression (MLR) oder sogenannte inverse Kalibrierverfahren, wie Partial Least-Squares (PLS) zur Regression angewendet werden.Further it is envisaged that for the calculation of analyte and marker substance concentrations in dialysate multivariate calibration methods, such as classical adaptation methods with stored signals while minimizing the sum of the spectral Least squares method, multiple linear squares Regression (MLR) or so-called inverse calibration methods, such as Partial least squares (PLS) are applied for regression.
Die Erfindung ist nachstehend anhand der Zeichnung beispielhaft näher erläutert. Diese zeigt jeweils in vereinfachter schematischer Darstellung in:The Invention is closer by way of example with reference to the drawing explained. This shows in each case in a simplified schematic Presentation in:
Eine
Vorrichtung zur Analyse einer flüssigen Probe weist gemäß
Eine
erste bevorzugte Ausgestaltung der Messzelle
Bei
dieser Ausführungsform können die Folien
In
Die
beiden Folien
In
den
Wie
in den
In
den
In
den
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - US 7271912 B2 [0008] - US 7271912 B2 [0008]
Zitierte Nicht-PatentliteraturCited non-patent literature
- - http://www.Abbott-Diabetes-Care.de [0005] - http://www.Abbott-Diabetes-Care.de [0005]
- - Zeitschrift Journal of Biomedical Optics March/April 2007 Volume 12 (2) Seiten 024004-1 bis 12 [0009] - Journal of Biomedical Optics March / April 2007 Volume 12 (2) pages 024004-1 to 12 [0009]
Claims (14)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810027085 DE102008027085B4 (en) | 2008-06-05 | 2008-06-05 | Device for analyzing a liquid sample and method for determining analyte in a dialysate with such a device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810027085 DE102008027085B4 (en) | 2008-06-05 | 2008-06-05 | Device for analyzing a liquid sample and method for determining analyte in a dialysate with such a device |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102008027085A1 true DE102008027085A1 (en) | 2010-05-20 |
DE102008027085B4 DE102008027085B4 (en) | 2010-07-15 |
Family
ID=42104750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200810027085 Expired - Fee Related DE102008027085B4 (en) | 2008-06-05 | 2008-06-05 | Device for analyzing a liquid sample and method for determining analyte in a dialysate with such a device |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102008027085B4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9215985B2 (en) | 2011-04-11 | 2015-12-22 | Fresenius Medical Care Deutschland Gmbh | Method and apparatus for monitoring a treatment of a patient, preferably for monitoring hemodialysis, hemodiafiltration, and/or peritoneal dialysis |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5348003A (en) * | 1992-09-03 | 1994-09-20 | Sirraya, Inc. | Method and apparatus for chemical analysis |
US5371020A (en) * | 1991-09-19 | 1994-12-06 | Radiometer A/S | Method of photometric in vitro determination of the content of an analyte in a sample |
US7271912B2 (en) | 2003-04-15 | 2007-09-18 | Optiscan Biomedical Corporation | Method of determining analyte concentration in a sample using infrared transmission data |
-
2008
- 2008-06-05 DE DE200810027085 patent/DE102008027085B4/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5371020A (en) * | 1991-09-19 | 1994-12-06 | Radiometer A/S | Method of photometric in vitro determination of the content of an analyte in a sample |
US5348003A (en) * | 1992-09-03 | 1994-09-20 | Sirraya, Inc. | Method and apparatus for chemical analysis |
US7271912B2 (en) | 2003-04-15 | 2007-09-18 | Optiscan Biomedical Corporation | Method of determining analyte concentration in a sample using infrared transmission data |
Non-Patent Citations (3)
Title |
---|
Heise, H.M. et al.: Bedside monitoring of subcutaneous interstitial glucose in healthy individuals using microdialysis and infrared spectrometry. Journal of Biomedical Optics 12(2), 2007, 024004-1 bis 024004-12 * |
http://www.Abbott-Diabetes-Care.de |
Zeitschrift Journal of Biomedical Optics March/April 2007 Volume 12 (2) Seiten 024004-1 bis 12 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9215985B2 (en) | 2011-04-11 | 2015-12-22 | Fresenius Medical Care Deutschland Gmbh | Method and apparatus for monitoring a treatment of a patient, preferably for monitoring hemodialysis, hemodiafiltration, and/or peritoneal dialysis |
Also Published As
Publication number | Publication date |
---|---|
DE102008027085B4 (en) | 2010-07-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE60318323T2 (en) | CALIBRATION TECHNOLOGY FOR NON-INVASIVE MEDICAL DEVICES | |
EP1292220B1 (en) | Method and device for detecting substances in body fluids by raman spectroscopy | |
DE10392210T5 (en) | Method and device for monitoring an analytical concentration by means of an osmosis differential pressure measurement | |
EP2046190B1 (en) | Measure of glucose concentration in pulsating blood | |
DE10311452B4 (en) | Analysis system for the reagent-free determination of the concentration of an analyte in living tissue | |
DE60312737T2 (en) | Method and device for measuring blood components | |
DE2637501A1 (en) | DEVICE FOR MEASURING THE CONCENTRATION OF A SUBSTANCE IN THE BLOOD | |
US20110009720A1 (en) | Continuous whole blood glucose monitor | |
DD300132A5 (en) | DEVICE AND METHOD FOR DETECTING AND MEASURING THE CONCENTRATION OF SUBSTANCES IN A SAMPLE THROUGH OPTOACUSTIC SPECTROSCOPY | |
DE10010587A1 (en) | System for the determination of analyte concentrations in body fluids | |
DE10105549A1 (en) | System for monitoring the concentration of analytes in body fluids | |
DE2211032C3 (en) | Method and device for determining the partial pressures or concentrations of gases dissolved in a liquid, in particular in the blood | |
EP1870033B1 (en) | Devices and method for detecting an analyte | |
DE102007031284A1 (en) | Concentration sensor and method of production | |
DE102015116357A1 (en) | sensor arrangement | |
EP2786121B1 (en) | Measuring chamber for an optical sensor for determining a concentration of a substance in the tissue fluid of a mammal | |
DE102011101193A1 (en) | Method and detection device for determining the uric acid and creatinine content | |
EP3244793A1 (en) | System and non-invasive method for examining at least parts of the blood fractions, and use of said system | |
DE102008027085B4 (en) | Device for analyzing a liquid sample and method for determining analyte in a dialysate with such a device | |
EP3017292B1 (en) | Device and method for determining the concentration of a substance in a flexible container | |
EP2502054B1 (en) | Method and device for inspecting a bodily fluid | |
EP2389097B1 (en) | System and method for analysing a body fluid | |
EP0905229B1 (en) | Process and device to determine and control the physiologic condition of microbial cultures | |
DE102012201390B4 (en) | Sensor arrangement for a vacuum therapy system and vacuum therapy system with sensor functionality | |
DE10102346A1 (en) | Concentration measurement of component in a solution e.g. human blood, by determining ratio of two e.g. optical signals according to parameter that is assessed based on ratio of factors in order of two signals to cancel out noise |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: LEIBNIZ-INSTITUT FUER ANALYTISCHE WISSENSCHAFT, DE |
|
8364 | No opposition during term of opposition | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20140101 |