EP3485256A1 - Durchflussmesszellenvorrichtung zur messung von fluidparametern - Google Patents
Durchflussmesszellenvorrichtung zur messung von fluidparameternInfo
- Publication number
- EP3485256A1 EP3485256A1 EP17739991.2A EP17739991A EP3485256A1 EP 3485256 A1 EP3485256 A1 EP 3485256A1 EP 17739991 A EP17739991 A EP 17739991A EP 3485256 A1 EP3485256 A1 EP 3485256A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radiation
- fluorescence
- flow cell
- source
- excitation
- 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.)
- Withdrawn
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
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
-
- 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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
-
- 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
- G01N2021/0321—One time use cells, e.g. integrally moulded
-
- 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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N2021/6432—Quenching
-
- 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
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/7756—Sensor type
- G01N2021/7763—Sample through flow
-
- 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
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/7769—Measurement method of reaction-produced change in sensor
- G01N2021/7786—Fluorescence
-
- 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
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/02—Mechanical
- G01N2201/022—Casings
- G01N2201/0228—Moulded parts
-
- 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
- G01N2201/02—Mechanical
- G01N2201/024—Modular construction
- G01N2201/0245—Modular construction with insertable-removable part
Definitions
- the present invention relates to a method and a flow measuring cell device for a measuring system for measuring fluid parameters (such as, for example, blood parameters) on a fluorescence-optical basis, and to a production method for the flow measuring cell device.
- fluid parameters such as, for example, blood parameters
- the measurement of the blood glucose concentration may, for example, be made by an external device (e.g., point-of-care meter, blood gas analyzer, laboratory analyzer).
- an external device e.g., point-of-care meter, blood gas analyzer, laboratory analyzer.
- the further development has the particular aim of integrating the measurement function into a therapeutic overall system.
- the measuring system can be formed from a disposable article through which the fluid (eg blood or rinsing solution) flows and a fluorescence source (eg a fluorophore) in contact with this fluid, as well as a reusable part containing the optoelectronic and electronic elements (radiation source, Detector) and is releasably connected to the disposable article.
- the fluid eg blood or rinsing solution
- a fluorescence source eg a fluorophore
- a reusable part containing the optoelectronic and electronic elements (radiation source, Detector) and is releasably connected to the disposable article.
- essentially two technical embodiments can be distinguished, namely a measurement in transmitted light (ie the radiation source (eg light source) for the excitation radiation and the detector for detecting the fluorescence radiation are located on opposite sides of the fluorophore) and a measurement in the backlight (ie, radiation source and detector are on the same side with respect to the fluorophore).
- WO 02/059585 A2 discloses examples of both aforementioned technical embodiments.
- the measurement is carried out by a phase detection method, ie a sinusoidally modulated excitation light generates a likewise sinusoidally modulated fluorescence signal in fluorescence-optical elements, which is picked up by the detector and forwarded to the downstream evaluation electronics. From the phase shift between excitation and fluorescent light, the physiological parameter to be measured can finally be determined.
- the excitation light emanating from the light sources strikes the fluorescent optical elements. These each emit fluorescence radiation which passes through a flow cell in which a fluid (e.g., blood or rinse solution) is located, and eventually encounters the detectors. It is therefore the aforementioned transmitted light principle used, with its specific advantages, but also with the specific disadvantages. Disadvantages of the transmitted light principle are, for example, the division of the optoelectronic elements into an excitation and a detection side. This division requires more construction volume and the mechanical structure becomes more complex and more expensive to manufacture.
- the insertion of the flow cell in the transducer causes a gap or slot-like indentation on the transducer, which usually has small dimensions because of the desired short light paths, whereby this area is difficult to clean and disinfect in clinical application.
- One of the objects of the present invention is to provide a measuring system for measuring fluid parameters on a fluorescence-optical basis, in which the Advantages of the transmitted light principle can be combined with the advantages of the backlight principle.
- a fluorescence-optical measuring system which uses the transmitted light principle, wherein a radiation deflection is provided such that the optoelectronic elements can be arranged on a plane with respect to the fluorescence source or the flow cell, so as to achieve advantages in terms of size, cost and handling ,
- the principle of transmitted light measurement can be combined with embodiments of the backlight measurement by deflecting the fluorescent light emitted by the fluorescence source (eg the fluorophore) through a radiation deflecting element (eg mirror, light guide, etc.) and striking the detector. which can then be located on the same level / side as the radiation source. This avoids the disadvantageous division of the optoelectronic elements and the associated electronics, which is unfavorable under various aspects.
- the mechanical design of the two-part measuring system can be greatly simplified, since the housing can be made simpler due to the omission of the two-part electronics.
- the outer contour of the connection geometry between replaceable flow cell and transducer can be made very simple. In the simplest case, it is merely a plane plane in contrast to the conventional complex contour with insertion slot. There- with the transducer is due to the simpler outer contour for cleaning or disinfection more accessible and has no poorly accessible slots o- the like.
- Fig. 1 is a schematic representation of the basic principle of a two-part measuring system according to various embodiments
- FIG. 2 shows a schematic illustration of a two-part measuring system with light-guiding element according to a first exemplary embodiment
- FIG. 3 is a schematic representation of a two-part measuring system with light guide element with bundling effect according to a second embodiment
- FIG. 4 shows a schematic illustration of a two-part measuring system with a planar mirror element according to a third exemplary embodiment
- FIG. 5 shows a schematic illustration of a two-part measuring system with mirror element with light bundling according to a fourth exemplary embodiment
- FIG. 6 is a schematic representation of a two-part measuring system with spatially reversed optoelectronic elements according to a fifth embodiment.
- FIG. 7 is a schematic representation of a two-part measuring system with spatially reversed optoelectronic elements and spatially interchanged fluorescence source according to a sixth embodiment.
- preferred exemplary embodiments of the present invention are described using the example of a two-part measuring system for measuring at least one blood parameter on a fluorescence-optical basis.
- Fig. 1 shows a schematic representation of the basic principle of a two-part measuring system with transducer and disposable article with measuring cell according to the various embodiments.
- the excitation light emitted by a light source 202 eg light-emitting diode, laser diode, etc.
- a radiation in the invisible range eg infrared range or ultraviolet range
- the excitation light then exits a transducer housing 201 and enters the housing 101 of the disposable (e.g., load cell) via a transparent element 104 (e.g., viewing window), whereupon it then encounters the fluorophore 103.
- the fluorophore 103 is in communication with a fluid (blood, irrigation fluid, infusion solution) within a flow cell 102 within the disposable.
- the fluorescent light is basically emitted in all spatial directions with some portion penetrating through the flow cell 102 and striking a first mirror 105 (within the disposable article) and subsequently a subsequent second mirror 106 (within the disposable article) that coexist cause a light deflection by preferably about 180 °.
- the deflected fluorescent light finally flows through an optical filter 205 (outside of the disposable article), which causes a suppression of unwanted wavelengths - in particular that of the excitation light.
- the filtered fluorescent light then passes through a diaphragm 206 (outside the disposable article) to focus on a detector 207 (outside of the disposable article, such as photodiode or other radiation detector), which generates a corresponding electrical signal, which then an evaluation in terms of is supplied to measuring blood parameters.
- a detector 207 outside of the disposable article, such as photodiode or other radiation detector
- FIG. 2 shows a schematic representation of a two-part measuring system according to a first exemplary embodiment with a light-guiding element 107 instead of a mirror.
- the two mirrors are replaced by the light guide (prism) 107.
- the light-conducting element 107 can be made, for example, from a transparent plastic whose refractive index leads to a total reflection of the incident fluorescent light at beveled boundary layers between plastic material and surrounding medium, whereby the desired light deflection is achieved.
- the light-conducting element 107 can be produced, for example, together with the housing 101 of the disposable article in a common injection process, or it can be mounted as a separate part in an assembly process.
- FIG. 3 shows a schematic representation of a two-part measuring system with an alternative light-conducting element 108 with a bundling effect according to a second exemplary embodiment.
- the second embodiment substantially corresponds to the first embodiment, in which case the alternative light-conducting element (parabolic element) 108 is shaped in such a way that a bundling effect arises.
- the luminous efficacy can be increased, that is, a larger proportion of the fluorescence emitted by the fluorophore 103 impinges on the detector 207. Since the fluorescent light is non-directional, there are not inconsiderable proportions that deviate from the central axis of the emission direction and by the bundling effect of the alternative Lichtleitelements 108 are additionally directed to the detector 207.
- the geometric shape of the alternative light-guiding element 108 can be optimized with respect to the luminous efficacy and can correspond, for example, to a two-dimensional or three-dimensional parabolic shape.
- 4 shows a schematic representation of a two-part measuring system with a planar mirror element 109 according to a third exemplary embodiment.
- the third exemplary embodiment substantially corresponds to the functional principle illustrated in FIG. 1, wherein the two mirrors have been replaced by the simple, planar mirror element 109.
- the fact is exploited that the fluorescent light is emitted by the fluorophore 103 in an undirected manner, so that more than just the center beam is deflected onto the detector 207.
- the flat mirror element 109 can be produced very simply, for example by attaching a reflective foil (for example an aluminum foil) on the outside of the flow measuring cell 102 or on the inside of the housing 101 of the disposable article.
- a reflective foil for example an aluminum foil
- the mirror element 109 can also be applied by vapor deposition of the housing 101 of the disposable article with metal vapor, so that a cost-effective production method can be selected.
- FIG. 5 shows a schematic representation of a two-part measuring system with an alternative mirror element 1 10 with light bundling according to a fourth exemplary embodiment.
- the fourth embodiment substantially corresponds to the third embodiment, wherein the alternative mirror element 1 10 is now formed so that a bundling effect similar to the second embodiment is formed.
- the luminous efficacy also increases here, that is, a larger proportion of the emitted fluorescent light impinges on the detector 207.
- the geometric shape can be optimized with regard to the luminous efficacy by the bundling effect being realized, for example, by a two-dimensional or also three-dimensional parabolic shape.
- FIG. 6 shows a schematic representation of a two-part measuring system with spatially reversed optoelectronic elements (light source 202, detector 207) according to a fifth exemplary embodiment.
- the position of light source 202 and detector 207 are spatially interchanged. This can be advantageous for certain applications. It should be explicitly emphasized that this variant can be combined with all of the exemplary embodiments presented above, ie all the modifications described in the first to fourth exemplary embodiments can also be used in addition to deflect the excitation light instead of the fluorescent light.
- FIG. 7 shows a schematic representation of a two-part measuring system with spatially reversed optoelectronic elements and spatially interchanged fluorescence source according to a sixth exemplary embodiment.
- the position of the light source and the detector are reversed as in the fifth embodiment.
- the spatial position of the fluorophore 103 is reversed. It is here arranged on the other side of the flow measuring cell 102. This can be advantageous because a light deflection is always associated with losses and in this embodiment, not the relatively weak fluorescent light, but the much brighter excitation light is deflected. It should be explicitly emphasized that this modification can also be combined with all embodiments described so far.
- the present invention can of course also be used to measure other fluid parameters in other fluids. It is also conceivable to use radiation outside the wavelength range of light.
- a flow cell device and a method for measuring at least one fluid parameter, such as a blood parameter have been described wherein excitation radiation is generated and directed to a fluorescence source.
- the fluorescence source is arranged in such a way that at least a part of the fluorescence radiation emitted by the fluorescence source when it is excited by the fluorescence source flows through a flow measuring cell.
- At least part of the emitted fluorescence radiation or of the supplied excitation radiation is detected, for example, by deflected by means of a radiation deflection device in such a way that the fluorescence radiation can be detected after flowing through the flow measuring cell on one side of the flow measuring cell, on which the excitation radiation is also supplied.
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Optical Measuring Cells (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016113042.7A DE102016113042A1 (de) | 2016-07-15 | 2016-07-15 | Durchflussmesszellenvorrichtung zur Messung von Fluidparametern |
| PCT/EP2017/067900 WO2018011410A1 (de) | 2016-07-15 | 2017-07-14 | Durchflussmesszellenvorrichtung zur messung von fluidparametern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3485256A1 true EP3485256A1 (de) | 2019-05-22 |
Family
ID=59350945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17739991.2A Withdrawn EP3485256A1 (de) | 2016-07-15 | 2017-07-14 | Durchflussmesszellenvorrichtung zur messung von fluidparametern |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3485256A1 (de) |
| DE (1) | DE102016113042A1 (de) |
| WO (1) | WO2018011410A1 (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6120734A (en) * | 1992-08-03 | 2000-09-19 | Sapidyne, Inc. | Assay system |
| US20080245971A1 (en) * | 2005-10-03 | 2008-10-09 | Koninklijke Philips Electronics, N.V. | Biosensors with Improved Sensitivity |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3725658A (en) * | 1971-01-18 | 1973-04-03 | Trw Inc | Apparatus and method for continuously detecting oxygen in a gas stream |
| US4180739A (en) * | 1977-12-23 | 1979-12-25 | Varian Associates, Inc. | Thermostatable flow cell for fluorescence measurements |
| DE3424108A1 (de) * | 1984-06-29 | 1986-01-09 | Bernhard Prof. Dr.-Ing. 4300 Essen Schrader | Probenanordnung zur spektrometrie, verfahren zur messung von lumineszenz und streuung und verwendung der probenanordnung |
| FI843409A0 (fi) * | 1984-08-29 | 1984-08-29 | Labsystems Oy | Fluorometer. |
| JPS6491037A (en) * | 1987-10-02 | 1989-04-10 | Hitachi Ltd | Cell for fluorometric analysis |
| DK66992D0 (da) * | 1992-05-21 | 1992-05-21 | Faxe Kalkbrud Aktieselskabet | Sensor |
| DE19526943C2 (de) * | 1995-07-24 | 1998-12-10 | Mittenzwey Klaus Henrik Dr | Mehrfachreflexionsvorrichtung zur Erzeugung und Messung von konventionellen Signalen und Sättigungssignalen der Fluoreszenz und der Streuung |
| US6124937A (en) * | 1996-11-15 | 2000-09-26 | Optosens Optische Spektroskopie Und Sensortechnik Gmbh | Method and device for combined absorption and reflectance spectroscopy |
| EP2264427B1 (de) * | 1997-01-31 | 2017-05-03 | Xy, Llc | Optisches Gerät mit fokussierendem Reflektor zur Konvergenz der Strahlung auf einen Partikelfluss, und zugehöriges Analyseverfahren |
| US6632402B2 (en) | 2001-01-24 | 2003-10-14 | Ntc Technology Inc. | Oxygen monitoring apparatus |
| DE10245432A1 (de) * | 2002-09-27 | 2004-04-08 | Micronas Gmbh | Verfahren und Vorrichtung zum Detektieren mindestens eines Lumineszenz-Stoffs |
| JP2009063462A (ja) * | 2007-09-07 | 2009-03-26 | Sony Corp | 光学測定装置及び微粒子解析装置 |
| GB2475277B (en) * | 2009-11-12 | 2014-05-21 | Bah Holdings Llc | Optical absorption gas analyser |
| US8692997B2 (en) * | 2010-08-25 | 2014-04-08 | Bah Holdings Llc | Optical gas and/or particulate sensors |
| US8742370B2 (en) * | 2012-03-21 | 2014-06-03 | Bah Holdings Llc | Gas sensor |
| US9618393B2 (en) * | 2014-09-24 | 2017-04-11 | Freestone Environmental Services, Inc. | Apparatus for measuring hexavalent chromium in water |
-
2016
- 2016-07-15 DE DE102016113042.7A patent/DE102016113042A1/de not_active Withdrawn
-
2017
- 2017-07-14 WO PCT/EP2017/067900 patent/WO2018011410A1/de not_active Ceased
- 2017-07-14 EP EP17739991.2A patent/EP3485256A1/de not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6120734A (en) * | 1992-08-03 | 2000-09-19 | Sapidyne, Inc. | Assay system |
| US20080245971A1 (en) * | 2005-10-03 | 2008-10-09 | Koninklijke Philips Electronics, N.V. | Biosensors with Improved Sensitivity |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2018011410A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018011410A1 (de) | 2018-01-18 |
| DE102016113042A1 (de) | 2018-01-18 |
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