EP1716418A2 - Dispositif et procede d'analyse optique de bandelettes de test - Google Patents

Dispositif et procede d'analyse optique de bandelettes de test

Info

Publication number
EP1716418A2
EP1716418A2 EP05707501A EP05707501A EP1716418A2 EP 1716418 A2 EP1716418 A2 EP 1716418A2 EP 05707501 A EP05707501 A EP 05707501A EP 05707501 A EP05707501 A EP 05707501A EP 1716418 A2 EP1716418 A2 EP 1716418A2
Authority
EP
European Patent Office
Prior art keywords
test strip
test
test strips
units
strips
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Withdrawn
Application number
EP05707501A
Other languages
German (de)
English (en)
Spanish (es)
Inventor
Andreas Buchmann
Stefan Jenni
Alexander Rietsch
Michael Sidler
Bruno Oesch
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.)
Prionics AG
Original Assignee
Prionics AG
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 Prionics AG filed Critical Prionics AG
Publication of EP1716418A2 publication Critical patent/EP1716418A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
    • G01N33/54366—Apparatus specially adapted for solid-phase testing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
    • B26F1/12—Perforating by punching, e.g. with relatively-reciprocating punch and bed to notch margins of work
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/52—Use of compounds or compositions for colorimetric, spectrophotometric or fluorometric investigation, e.g. use of reagent paper and including single- and multilayer analytical elements
    • G01N33/521—Single-layer analytical elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/558—Immunoassay; Biospecific binding assay; Materials therefor using diffusion or migration of antigen or antibody
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G06T7/0012—Biomedical image inspection

Definitions

  • the present invention relates to a device for the optical evaluation of test strips and a method for the optical evaluation of test strips.
  • Test strips are often used in clinical diagnostics, for example, to diagnose easily detectable physiological parameters, metabolites or pathogens.
  • test strips are used for the detection of a large number of different analytes in liquid or homogenized samples.
  • at least one delimited area is provided on the test strip, in which a detection reagent for the specific analyte is immobilized.
  • Such test strips are e.g. used for the detection of glucose in the urine or for the blood sugar content or e.g. for the detection of prion proteins in liquid or liquefied or homogenized samples.
  • the last mentioned test strip is e.g. from DE 10147012 of the applicant of the present invention.
  • the test strips are designed in such a way that an optically detectable signal can be generated in the delimited area after contact with the sample to be examined, which signal is then detected by the examining person by inspection or with the aid of an image analysis device.
  • the optically detectable signal can be, for example, a change in color, a brightening or darkening, or a change in fluorescence.
  • test strips can be combined to form a comb-like test strip unit, the test strips being combined with one another in a defined geometric arrangement, so that their lower sections can be inserted simultaneously into the sample vessels of a microtiter plate arranged in a row.
  • the object of the present invention is to provide a device for the optical evaluation of test strips, which makes it possible to evaluate the optically detectable signals on test strips possibly combined to form a test strip unit at high speed and to assign them to the respective test subject with high certainty.
  • a device for the optical evaluation of test strips is provided, the test strips each having at least one delimited area in which an optically detectable signal can be generated after contact with a sample to be examined.
  • the device consists of a positioning device, which has a receptacle for at least one test strip, and an image generation device, which detects at least one of the delimited areas of a test strip arranged in the positioning device and / or a test strip unit and transfers the detection result to an image analysis device, the image analysis device qualitatively and / or quantitatively evaluates the optically detectable signals for each test strip.
  • the positioning device has receptacles for several test strips and / or test strip units.
  • the optically detectable signal is generally correlated with a chemical or immunological reaction that can take place in the delimited area or areas after contact with a sample to be examined.
  • reagents, enzymes or antibodies are immobilized in the delimited areas.
  • the optically detectable signal can consist, for example, of a color change, a brightening or darkening or a change in the fluorescence.
  • the optically detectable signal can also be the absence of a signal.
  • the image analysis device For the qualitative evaluation, it is sufficient for the image analysis device to check whether or not an optically detectable signal is present in the delimited areas.
  • the quantitative evaluation on the other hand, it is first necessary for the chemical or immunological reaction on which the signal is based to have a mathematical relationship between the concentration of the physiological parameter or analyte to be detected and the strength or the change in the optically detectable signal. This can be any mathematical relationship, such as a linear or an exponential ratio. If these conditions are met, a quantitative evaluation of the optical signal is also possible. This can e.g. by densitometric, colorimetric or fluorometric measurement of the defined area or areas.
  • test strips are very complex and inefficient in routine diagnostics.
  • several test strips can therefore be connected to form a test strip unit in such a way that the lower sections of the test strips of the individual test strip units, for example, can be inserted simultaneously into the sample vessels of a sample vessel assembly arranged in rows.
  • sample vessel assemblies can be, for example, commercially available microtiter plates or rack systems for microreaction vessels.
  • the positioning device has a receptacle for at least one test strip unit. It is preferably provided that the positioning device has receptacles for several test strip units.
  • the image analysis device also evaluates the optically detectable signals qualitatively and / or quantitatively for each test strip.
  • test strip units which can be used according to the invention can consist of individual test strips which are not connected to one another and which are connected, for example, by means of a connecting device running transversely to the test strips. are connected to one another by clamping or gluing.
  • the test strip units with the individual test strips can also be formed in one piece from, for example, a blank.
  • individual test strips that are not combined into a test strip unit can also be used.
  • the image generation device is a scanner.
  • This can be, for example, a commercially available A4 flatbed scanner.
  • the image generation device can equally well be a digital camera which is arranged, for example, on a tripod or on a robot arm above the positioning device. But the use is the same a CCD element or another suitable image generation device possible.
  • the positioning device is designed such that it can be arranged in the scanner which is preferably provided.
  • the positioning device is placed on the flatbed scanner.
  • the image generation device can also be a portable device that e.g. only image a test strip or a test strip unit.
  • a portable device e.g. only image a test strip or a test strip unit.
  • Such a device would e.g. Particularly suitable for individual diagnosis or the diagnosis of a few test subjects.
  • Such an arrangement would have great advantages, particularly in the field where there is no PC available.
  • the positioning device could e.g. be permanently installed in the imaging device, e.g. as a recess for a test strip unit hidden under a flap.
  • the positioning device could possibly also consist of a feed device that pulls a single test strip through a slot.
  • other configurations are also conceivable.
  • any device is suitable as a positioning device in which at least one test strip or a test strip unit can be arranged, and which in turn can be arranged in or on or on the image forming device in such a way that the image forming device adjusts the or the delimited areas of test strips arranged in the positioning device can capture.
  • the positioning device and the image generation device are designed such that the positioning device is reproducible in a defined arrangement on or in the image generator. supply device can be arranged. This ensures that the detection result generated by the image generation device always contains the same or the same areas of the positioning device.
  • the positioning device preferably consists of a frame and the receptacles for the test strip units preferably consist of cutouts in this frame.
  • the frame can e.g. consist of a plastic such as PVC.
  • test strip units or, if individual test strips are used instead of the test strip units, to be inserted into cutouts which are appropriately adapted to their size and shape. It is particularly preferably provided that the cutouts and the test strip units or the test strips are designed in such a way that the test strip units or the test strips can snap into them when arranged in the cutouts. For this purpose e.g. it can be provided that the test strip units have edge reinforcements which are provided with a lateral groove into which an elastic lip arranged there engages when arranged in the receptacles of the positioning device. However, other configurations are also conceivable that can allow the test strip units or the test strips to snap into the recesses.
  • the cutouts and the test strip units are designed in such a way that a given test strip unit can only be positively arranged in a defined receptacle of the positioning device.
  • the edges of the recordings can be have standing elements which engage according to the key-lock principle in corresponding recesses in the edge reinforcements of the test strip units. This configuration can also be applied to the use of individual test strips.
  • the positioning device has at least two optically detectable position markers.
  • the image analysis device consists of a computer with image processing software.
  • the image generation device detects the position markers and transfers the detection result to the image analysis device, which can locate the test strip units, the test strips and / or the delimited areas with the aid of the position markers and thus reproducibly recognize them.
  • the position markers it is necessary for the position markers to be arranged at known distances and angles to the individual receptacles for the test strip units or test strips, and for the relative positions of the test strip units and / or the test strips and the delimited regions to one another to be known.
  • the test strip units and / or the test strips have optically detectable, individualizing markings.
  • These can include information about the production batch, the minimum durability date of the test strip unit or test strips, information about the test at hand or the evaluation protocol to be used, or user information such as the identity of the test subjects, the date of the test, etc.
  • the individualizing markings around bar or bar codes as they can be easily read in by a barcode reader, but also by a commercially available scanner with a suitable image analysis device.
  • test strip units or test strips are combined in lots and delivered to the end user.
  • a calibration sheet is attached to each lot, on which a machine-readable form, e.g. in the form of a two-dimensional barcode, relevant data of the lot or the test strip units contained therein.
  • a machine-readable form e.g. in the form of a two-dimensional barcode
  • relevant data of the lot or the test strip units contained therein e.g. Test strip units of a new solder are arranged in the device according to the invention instead of the positioning device and read in with the image generation device.
  • reading the calibration sheet is mandatory, i. H. A test strip unit of a new lot can only be measured after this.
  • the image generation device detects the individualizing markings and transfers the detection result to the image analysis device, which identifies the individual test strip units and / or the test strips on the basis of the individualizing markings, and the data coded in the markings, if necessary used for the evaluation.
  • the image analysis device identifies the individual test strip units and / or the test strips on the basis of the individualizing markings, and the data coded in the markings, if necessary used for the evaluation.
  • the relative positions of the indi- vidualizing markings and the test strip units and / or the test strips and the delimited areas are known to one another.
  • the test strip units and / or the test strips also have at least two optically detectable position markers.
  • This feature is a prerequisite for a particularly preferred embodiment of the invention, according to which the image generation device detects the position markers on the test strip units or the test strips and transfers the detection result to the image analysis device, which locates the test strip units, the test strips and / or the delimited areas with the aid of the position markers and so can reproducibly recognize.
  • the position markers are arranged at known distances and angles to the individual test strips, so that the relative positions of the position markers, the test strip units and / or the test strips and the delimited areas with respect to one another are known.
  • the image analysis device qualitatively and / or quantitatively evaluates the optically detectable signals for each test strip.
  • the quantitative evaluation can e.g. by densitometric, colorimetric or fluorometric measurement of the delimited area or areas.
  • the accuracy of the quantitative evaluation can be impaired, for example, by fluctuations in the brightness of the lamp of the scanner or by fluctuations in the brightness of the test strip material.
  • the image analysis device In order to be able to compare the results of different quantitative evaluations with one another, the image analysis device must therefore be calibrated at regular intervals, for example before each measurement, or calibrate itself.
  • the positioning device has an optically detectable gray scale and / or a color scale.
  • a gray scale or a color scale can be applied to the positioning device by the manufacturer with high reproducibility. If necessary, it can be designed in such a way that it can be replaced at regular intervals, for example to prevent bleaching.
  • the gray scale or the color scale can be designed in the form of a sticker.
  • the image generation device detects the gray scale and / or the color scale and transfers the detection result to the image analysis device, which uses this for calibration for evaluating the optically detectable signals on each test strip.
  • the evaluation can e.g. by densitometric, colorimetric or fluorometric measurement of the delimited area or areas.
  • test strips are arranged parallel to one another and are spaced apart from one another in such a way that their lower sections can simultaneously be inserted into adjacent sample vessels of a row of vessels of a sample vessel assembly.
  • sample vessel assemblies can e.g. are commercially available microtiter plates or rack systems for microreaction vessels.
  • test strip unit This feature facilitates the use of the test strip units with microtiter plates and enables a large number of samples from different test subjects to be examined simultaneously, and thus the throughput speed in routine diagnostics is significantly increased. It is particularly preferred to design the test strip unit in such a way that a plurality of test strip units with their lower sections can be used simultaneously in different rows of vessels in the sample vessel assembly.
  • microtiter plates with 96 sample tubes have twelve rows with eight sample tubes each.
  • the sample vessels have a diameter of approximately 6 mm and the individual sample vessels are spaced approximately 2 mm apart. It is therefore preferably provided that the test strip units each have eight test strips, the width and spacing of which correspond to the dimensions mentioned.
  • Other microtiter plate formats have 24 or 48 rows, each with 16 or 32 sample tubes. It is therefore also provided that the test strip units can also have 16 or 32 test strips, their width and spacing from one another likewise corresponding to the diameters and spacing of the respective sample vessels.
  • the positioning device is preferably designed in such a way that it can accommodate as many test strip units as can be used in the different rows of vessels of a sample vessel assembly. If the sample vessel assembly is e.g. around a eight by twelve format microtiter plate, test strip units with eight test strips would preferably be used. The positioning device would accordingly have twelve receptacles for test strip units.
  • the image analysis device carries out a plausibility check, by means of which it is checked, for example, whether a test strip unit or a test strip is arranged in all the receptacles of the positioning device, whether the individual test strip units or test strips are in a desired order are arranged in the receptacles of the positioning device whether the test strips unit units or test strips come from the same production batch and / or whether the expiration date of the test strip units or test strips has already been reached.
  • a plausibility check by means of which it is checked, for example, whether a test strip unit or a test strip is arranged in all the receptacles of the positioning device, whether the individual test strip units or test strips are in a desired order are arranged in the receptacles of the positioning device whether the test strips unit units or test strips come from the same production batch and / or whether the expiration date of the test strip units or test strips has already been reached.
  • the present invention is not limited to the device as such but also relates to suitable, in particular separately manageable, positioning devices for a device according to one of the preceding claims.
  • Suitable positioning devices form an area that can be imaged by an image generating device and have at least one receptacle for a test strip unit or a test strip.
  • the positioning device preferably has receptacles for a plurality of test strip units or test strips.
  • the positioning device consists of a frame and the receptacles for the test strip units or the test strips consist of cutouts in the frame.
  • the cutouts in the frame and the test strip units or the test strips are particularly preferably designed in such a way that when arranged in the cutouts they can snap into them.
  • the test strip units or the test strips are simply inserted into the cutouts.
  • the positioning device has at least two optically detectable position markers.
  • the positioning device according to the invention particularly preferably has a gray scale and / or a color scale.
  • the image analysis device provided in the device according to the invention preferably has software for the optical evaluation of test strips.
  • the test strips each have at least one delimited area in which, after contact with a sample to be examined, an optically detectable signal can be generated, the software using the result of the acquisition of at least the delimited areas transmitted by an image generation device, the positions of the individual test strips and / or the delimited areas are determined, the individual test strip units, test strips and / or the delimited areas are identified, and the optically detectable signals for each test strip are qualitatively and / or quantitatively evaluated.
  • test strips are connected in a defined planar arrangement to form a test strip unit and the software determines the positions of the test strip units, identifies the individual test strip units and evaluates the optically detectable signals for each test strip qualitatively and / or quantitatively ,
  • the software locates the test strip units, the test strips and / or the delimited areas with the aid of position markers which are arranged on the positioning device, the test strip units and / or the test strips and are imaged by the image generation device and thus reproducibly.
  • the software identifies the individual test strip units and / or the individual test strips on the basis of individualizing markings, which are imaged by the image generation device and are arranged on the test strip units and / or the test strips, and in the markings coded data possibly used for the evaluation. It is also preferably provided that the software evaluates the optically detectable signals on the test strips with the aid of a gray scale and / or color scale captured by the image generating device. The quantitative evaluation can be carried out, for example, by densitometric, colorimetric or fluorometric measurement of the delimited area or areas.
  • the software carries out a plausibility check, by means of which e.g. It is checked whether a test strip unit or a test strip is arranged in all the receptacles of the positioning device, whether the individual test strip units or test strips are arranged in a desired order in the receptacles of the positioning device, whether the test strip units or test strips come from the same production batch, and / or whether that The best before date of the test strip units or test strips has already been reached.
  • a plausibility check by means of which e.g. It is checked whether a test strip unit or a test strip is arranged in all the receptacles of the positioning device, whether the individual test strip units or test strips are arranged in a desired order in the receptacles of the positioning device, whether the test strip units or test strips come from the same production batch, and / or whether that The best before date of the test strip units or test strips has already been reached.
  • the present invention also covers a method for the optical evaluation of test strips, in which the test strips have at least one delimited area in which an optically detectable signal can be generated after contact with a sample to be examined.
  • at least one test strip is arranged in a receptacle of a positioning device which can be arranged on an image-forming device and at least one of the delimited areas is imaged by means of the image-forming device.
  • a plurality of test strips are preferably arranged in receptacles of the positioning device.
  • the detection result is transferred to an image analysis device which determines the positions of the individual test strips and / or delimited areas and identified, and qualitatively and / or quantitatively evaluates the optically detectable signal for each test strip.
  • test strips are connected in a defined planar arrangement to form a test strip unit and at least one test strip unit is arranged in a receptacle of a positioning device.
  • a plurality of test strip units are preferably arranged in receptacles of the positioning device.
  • the image analysis device determines the positions of the individual test strip units, identifies them and evaluates the optically detectable signal for each test strip qualitatively and / or quantitatively.
  • position markers arranged on the positioning device, the test strip units or the test strips are recorded with the aid of the image generation device and the detection result is transferred to the image analysis device which delimits the test strip units, the test strips and / or the delimited ones Localize areas with the help of position markers and thus recognize them reproducibly.
  • the image generation device detects individualizing markings arranged on the test strip units or the test strips and transfers the detection result to the image analysis device, which identifies the individual test strip units and / or the individual test strips on the basis of the individualizing markings, and the data coded in the markings may be used for the evaluation.
  • the image generation device detects a gray scale and / or color scale arranged on the positioning device and transmits the detection result to the image analysis device, which uses this as a calibration scale for evaluating the optically detectable signals on each test strip.
  • the quantitative evaluation can be carried out, for example, by densitometric, colorimetric or fluorometric measurement of the defined area or areas.
  • test strip units which can be used in the device according to the invention and consist of a plurality of test strips arranged in a defined planar arrangement with respect to one another, the test strips each having at least one delimited area in which an optically detectable signal is generated after contact with a sample to be examined.
  • test strips are connected in a defined flat arrangement to form a test strip unit.
  • the test strips have an absorbent cut, in each of which at least one delimited area is provided, in which an optically detectable signal can be generated after contact with a sample to be examined.
  • the absorbent blank is made of the same material. Nitrocellulose is particularly preferably used for this, but any other material suitable for this purpose is also conceivable.
  • this test strip unit provides that the absorbent blanks of the individual test strips are integrally connected with one another. It is particularly preferably provided that the test strip unit has an edge reinforcement running transversely to the test strips and arranged in the suction direction above the delimited areas.
  • This edge reinforcement can consist, for example, of a plastic strip hen that is glued to the test strip material.
  • the edge reinforcement can, for example, facilitate the handling of the test strip units and in turn carry the position markers and / or individualizing markings already described.
  • the edge reinforcement can be provided, for example, with a groove into which one or more elastic lips arranged there can engage when arranged in the receptacles of the positioning device. In this way, the test strip units can snap into the receptacles of the positioning device.
  • the test strip unit consists of individual test strips which are not connected to one another and are connected to one another by means of a connecting device which runs transversely to the test strips and is arranged in the suction direction above the delimited areas.
  • a connecting device which runs transversely to the test strips and is arranged in the suction direction above the delimited areas.
  • the test strips can be glued or stapled into the connecting device or held by this by clamping. Any other fastening option is also conceivable.
  • the connecting device can also simultaneously function as an edge reinforcement in the sense already described, that is, it can be designed such that it connects e.g. the handling of the test strip units is facilitated, carries the position markers and / or individualizing markings already described, or enables them to be snapped into the recesses in the positioning device.
  • the absorbent cut of the test strips is applied to a stiff carrier material.
  • This can be a plastic material, for example.
  • the carrier material simplifies the handling of the test strip units and prevents the test strips from being deformed, for example when inserted into the sample vessels of the microtiter plates.
  • the test strip unit is designed in such a way that the individual test strips are arranged parallel to one another and are spaced apart from one another in such a way that their lower sections can simultaneously be inserted into adjacent sample vessels of a row of vessels of a composite sample vessel.
  • sample vessel assemblies can be, for example, commercially available microtiter plates or rack systems for microreaction vessels.
  • test strip unit is designed in such a way that a plurality of test strip units can be used simultaneously in different rows of vessels in a sample vessel assembly.
  • the test strip unit has a wastepad which is arranged in the suction direction above the delimited areas and which serves to absorb any excess liquid.
  • This wastepad can e.g. made of pressed pulp.
  • a further aspect of the invention therefore relates to a punching method for producing a test strip unit, in which the absorbent blanks of the individual test strips are integrally formed with one another.
  • a blank for a test strip unit which consists at least of the material for the absorbent blank, is placed on a punching plate and at least the absorbent blank of the test strip unit is punched out.
  • the blank consists of at least one layer of absorbent material.
  • a punching plate which has a negative profile corresponding to the blanks of the test strip unit, the blades of the punching tool used having a falling profile which successively engages in the recesses of the negative profile of the punching plate during the punching process.
  • the method makes it possible for the first time to economically produce large numbers of test strip units in which the absorbent blanks of the individual test strips are integrally connected to one another.
  • test strip units consisting of individual test strips which are not connected to one another cannot be produced using the above punching process.
  • a method for producing a test strip unit in which the test strip unit consists of a plurality of individual test strips which are connected by means of a connecting device running transversely to the test strips. device are connected to each other.
  • This method has the advantage over the aforementioned that the reject of test strip material can be reduced.
  • the individual test strips can be cut out in a conventional manner with a cutting machine and then combined as described to form a test strip unit.
  • the test strips can be glued or stapled into the connecting device or held by this by clamping. Any other fastening option is also conceivable.
  • the connecting device can also simultaneously function as an edge reinforcement in the sense already described, that is, it can be designed such that it facilitates, for example, the handling of the test strip units, bears the position markers and / or individualizing markings already described, or enables it to snap into the recesses in the positioning device.
  • FIG. 1 shows a test strip unit consisting of several test strips
  • FIG. 2 shows a positioning device with receptacles for test strip units
  • FIG. 3 shows a further test strip unit
  • FIG. 4 shows a punching tool for producing a test strip unit according to the invention
  • FIG. 5 shows a test strip unit with an edge reinforcement
  • Figure 6 A test strip unit with a connecting device.
  • FIG. 1 shows a test strip unit 11, consisting of several test strips 12, each of which has a delimited area 13, in which an optically detectable signal is generated after contact with a sample to be examined can, as well as two individualizing markings 14 and 15 and position markers 16.
  • the test strip unit 11 has eight test strips 12, the width and spacing of which correspond to the diameters and spacings of a commercially available microtiter plate with 96 sample vessels.
  • the lower sections of the test strips 12 can therefore be used simultaneously in adjacent sample vessels of a row of the microtiter plate.
  • a total of twelve test strip units can be inserted simultaneously into the different rows of tubes on the microtiter plate.
  • the black arrow indicates the direction in which liquid is drawn into the test strips when the lower sections of these are inserted into the sample vessels of a microtiter plate.
  • the individualizing markings 14 and 15 are in the form of bar codes and contain manufacturer information and / or user information.
  • the position markers 16 make it possible for the image analysis device to locate the test strip unit 11, the test strips 12 and / or the delimited areas 13 and thus to detect them reproducibly.
  • FIG. 2 shows a positioning device 21 with receptacles 22 for the test strip units 11, with position markers 23, a gray scale 24 and a color scale 25.
  • the positioning device 22 is designed in the form of a surface that can be imaged by the image generating device.
  • the position markers 23 are imaged by the image generation device, so that the image analysis device can locate the test strip unit 12 with the aid of the position markers 23 and thus detect them in a reproducible manner.
  • the gray scale 24 and / or the color scale 25 is also captured by the image generation device and used by the image evaluation device for calibration. Depending on Intended use can be provided that the positioning device 21 has only the gray scale 24 or the color scale 25.
  • the positioning device 21 has twelve receptacles 22 for test strip units 11 and can therefore accommodate as many test strip units 11 as can be used in the various tube rows of a commercially available microtiter plate with 96 sample tubes.
  • FIG. 3 shows a test strip unit 31 which consists of a plurality of test strips 32 arranged in a defined planar arrangement with respect to one another, each of which has at least one delimited area 33. In the latter, an optically detectable signal can be generated after contact with a sample to be examined.
  • the test strips 32 consist of an absorbent material 35, which is applied to a rigid carrier material 34.
  • the rigid support material can e.g. is a plastic, while the absorbent material is e.g. can be nitrocellulose.
  • the test strip unit has eight test strips, the diameter and spacing of which are selected such that the lower sections of the individual test strips can simultaneously be inserted into adjacent sample vessels of a row of tubes of a microtiter plate.
  • test strip unit 31 has a wastepad which serves to absorb any excess liquid.
  • the wastepad can e.g. made of pressed pulp.
  • FIG. 4 shows a punching tool for producing a test strip unit in which the absorbent blanks of the individual test strips are integrally connected to one another.
  • the punching tool consists of a punch plate 41 and a punch 42, the blades 43 have a falling profile.
  • the punching plate 41 has a negative profile corresponding to the shape of the test strip unit to be produced.
  • a test strip blank is placed on the stamping plate 41.
  • the falling profiles 43 of the punching tool 42 then successively engage in the recesses 44 of the negative profile of the punching plate 41 and thus cut out the area to be removed from the blank.
  • FIG. 5 shows a test strip unit 51 in which the absorbent areas of the individual test strips 52 are integrally connected to one another.
  • the test strip unit furthermore has an edge reinforcement 54 running transversely to the test strips 52 and arranged in the suction direction above the delimited areas 53.
  • a groove 55 is provided, into which an elastic lip arranged there can engage when arranged in the receptacles of the positioning device, so that the test strip unit 51 engages in the receptacle.
  • the test strip unit can be positioned particularly securely.
  • FIG. 6 shows a test strip unit 61 which consists of individual test strips 62 which are not connected to one another, the test strips 62 being connected to one another by means of a transverse connecting device 64 arranged above the delimited regions 63 in the suction direction.
  • the test strips 62 can be glued or stapled into the connecting device 64 or held by this by clamping.
  • the connecting device 64 can also simultaneously function as an edge reinforcement in the sense already described; in particular, it can also have a groove which enables it to snap into the receptacles of the positioning device.

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Abstract

L'invention concerne un dispositif d'analyse optique de bandelettes de test présentant chacune au moins une zone délimitée dans laquelle un signal détectable par voie optique peut être généré après l'entrée en contact avec un échantillon à analyser. Ce dispositif d'analyse optique comporte un dispositif de positionnement, présentant un élément de réception pour au moins une bandelette de test ou au moins une unité de bandelettes de test composée de plusieurs bandelettes reliées en un ensemble plan défini, ainsi qu'un dispositif de formation d'images balayant au moins une des zones délimitées pour former des images et transmettant le résultat du balayage à un dispositif d'analyse d'images, lequel dispositif d'analyse d'images effectue, pour chaque bandelette de test, une analyse qualitative et/ou quantitative des signaux détectables par voie optique.
EP05707501A 2004-02-19 2005-02-18 Dispositif et procede d'analyse optique de bandelettes de test Withdrawn EP1716418A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004008539A DE102004008539A1 (de) 2004-02-19 2004-02-19 Vorrichtung und Verfahren zur optischen Auswertung von Teststreifen
PCT/EP2005/001691 WO2005083434A2 (fr) 2004-02-19 2005-02-18 Dispositif et procede d'analyse optique de bandelettes de test

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EP1716418A2 true EP1716418A2 (fr) 2006-11-02

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US (1) US20070161103A1 (fr)
EP (1) EP1716418A2 (fr)
JP (1) JP2007523335A (fr)
CN (1) CN1922488A (fr)
AU (1) AU2005217718A1 (fr)
BR (1) BRPI0507882A (fr)
CA (1) CA2556817A1 (fr)
DE (1) DE102004008539A1 (fr)
MX (1) MXPA06009063A (fr)
WO (1) WO2005083434A2 (fr)

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DE102004008539A1 (de) 2005-09-01
AU2005217718A1 (en) 2005-09-09
US20070161103A1 (en) 2007-07-12
CA2556817A1 (fr) 2005-09-09
BRPI0507882A (pt) 2007-08-07
WO2005083434A3 (fr) 2006-03-30
MXPA06009063A (es) 2007-01-26
CN1922488A (zh) 2007-02-28
JP2007523335A (ja) 2007-08-16
WO2005083434A2 (fr) 2005-09-09

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