WO2001069242A1 - Procede et appareil d'analyse de sang - Google Patents
Procede et appareil d'analyse de sang Download PDFInfo
- Publication number
- WO2001069242A1 WO2001069242A1 PCT/JP2001/001896 JP0101896W WO0169242A1 WO 2001069242 A1 WO2001069242 A1 WO 2001069242A1 JP 0101896 W JP0101896 W JP 0101896W WO 0169242 A1 WO0169242 A1 WO 0169242A1
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- Prior art keywords
- blood
- analyzing
- analysis
- moving
- collection
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/14—Devices for taking samples of blood ; Measuring characteristics of blood in vivo, e.g. gas concentration within the blood, pH-value of blood
-
- 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
- G01N33/483—Physical analysis of biological material
- G01N33/487—Physical analysis of biological material of liquid biological material
- G01N33/49—Blood
- G01N33/491—Blood by separating the blood components
Definitions
- the present invention relates to a blood analysis method and device for measuring a concentration.
- the feature is that all the functions and structures required for the above-mentioned operations are integrated in one device.
- thermometers As electronic devices for diagnosing human health conditions and diseases, there are automatic blood analyzers in addition to thermometers, sphygmomanometers, ultrasonic diagnostics, X-ray CT, and MRI.
- a capillary electrophoresis method is generally used as a method for measuring contaminants in a solution such as serum. This method will be described with reference to FIG. 101 is a quartz tube, 102 is a positive electrode, and 103 is a negative electrode. For example, about 0.1 mm in diameter
- the electrolytic solution is put into a long and thin quartz tube 101 called a "capillary".
- a quartz tube a negative charge is generated on the inner wall surface, and cations (positive ions) in the electrolyte collect on the inner wall of the quartz due to the Coulomb force with the negative charge. It forms a so-called Helmholtz double barrier 104.
- electrophoretic flow 109 when a high voltage is applied to the electrodes 102 and 103 provided at both ends of the cavity, first, the cation 105 on the inner wall is pulled toward the negative voltage 103 and moves. The entire electrolyte moves to the negative voltage 103 side due to the viscosity. This flow is called electroosmotic flow 106. On the other hand, the cations in the electrolyte reach the negative electrode 103 side first, the neutral species 107 arrives next by the electroosmotic flow 106, and the anion 108 (negative ion). ) Is originally pulled to the positive voltage side 102, but moves to the negative voltage side 103 by the electroosmotic flow 106, and thus arrives at the latest. The flow in which the anion or the cation is moved by the electric field is called an electrophoretic flow 109.
- micro-capillary manufactured by forming the above-mentioned cavities on a quartz plate or a polymer plate, covering the lid, and manufacturing the cavities on a chip of several cm square.
- DNA or the like is placed in a neutral gel. Since DNA has a charge, it is moved by electrophoresis, and separated by a total charge difference due to a difference in molecular weight.
- a reaction detection method different from the conventional test tube method in which another reagent is added to a substance moving in a microcapillary in the middle and the reaction is detected, is being actively studied [for example, Baba Yoshinobu; Protein Nucleic Acid Enzyme, Vol. 45, No. 1 (2000), pp. 76-85].
- This is called a total analysis system (—TAS) divided by a lab-on-chip.
- the above-mentioned automatic blood analyzer is generally used in blood centers and hospitals, is expensive and large-scale, and requires several hours for a full diagnosis.
- Blood analysis is performed during the annual health checkup, which is conducted about once a year for the cause of a disease or for a healthy body, so that a single analysis can provide various types of information in detail. It is an object.
- human health is being eroded every day due to the deterioration of the environment such as atmospheric warming and endocrine disrupters, and more frequent blood tests to manage health conditions are serious diseases. Needed to prevent progress to Such blood tests for the purpose of daily health management include at most the so-called health markers such as pH, oxygen, carbon dioxide, sodium, calcium, calcium, glucose, and lactic acid in the blood. It is enough to measure only the concentration of what is called. It was not necessary to carry out a detailed test using an expensive, large-scale blood analyzer as described above, and a simple device with narrowed analysis items was required.
- an object of the present invention is to provide a blood analysis method that can be easily handled at home without the drawbacks of the conventional blood analysis method using a conventional blood analyzer as described above.
- the present invention functions such as blood collection, filtration, separation, and analysis necessary for blood analysis are integrated into a compact in order to realize the above-mentioned object, and knowledge of medical treatment specialized in handling, No need for qualification, can be handled by ordinary people
- the purpose of the present invention is to provide a blood analyzer. Disclosure of the invention
- the present invention provides, as a blood analyzer, a collecting means for collecting blood from a living body on one or a plurality of substrates, a filtering means for filtering at least the collected blood to obtain plasma, or a blood collecting apparatus. Any of the separation means for separating serum from the blood, the analysis means for analyzing the substance in the blood, the collection means, the filtration means, the separation means, and the channel means for connecting the analysis means.
- the blood analysis method according to the present invention is performed by a blood analyzer integrated from blood collection to analysis. This makes it suitable for the general public who does not have specialized medical knowledge and qualifications.
- FIG. 1 is a diagram for explaining the capillary electrophoresis method
- FIG. 2 is a diagram schematically showing a preferred apparatus according to the present invention
- FIG. 3 is a diagram for explaining a method for producing micro-capillaries.
- FIG. 4 is a diagram showing the movement of ions in a microcapillary by electroosmotic flow
- FIG. FIG. 6 is a diagram showing a method of measuring the suction force of the pumping action
- FIG. 6 is a diagram showing the configuration of the separation means
- FIG. 7 is a diagram showing a centrifuge
- FIG. Fig. 9 shows the effect of the MPC polymer coat on the inner wall of the microphone capillaries.
- Fig. 9 shows the effect of the microcapillary length on the pump action.
- FIG. 11 is a diagram illustrating a configuration of a chemical sensor.
- FIG. 11 is a diagram illustrating a measurement result of glucose density
- FIG. 12 is a diagram illustrating a measurement result of each of pH, Na +, and K +.
- FIG. 13 is a diagram showing a configuration of a blood analyzer having an anticoagulant supply device.
- FIG. 14 is a diagram showing a blood analyzer having an anticoagulant supply device.
- FIG. 2 is a diagram illustrating a configuration of an apparatus. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 2 shows a schematic diagram of the device based on the present invention.
- Reference numeral 201 denotes a substrate, and each means of the apparatus is arranged along a micro-pillar manufactured by etching the substrate.
- the surface of the microcapillaries is provided with a coating of MPC polymer (2-methacryloyloxyethylphosphorylcholine) to prevent solidification and adhesion of proteins in plasma and serum on the microcapillary surfaces.
- Reference numeral 202 denotes a blood sampling means.
- 203 is a hollow needle attached to the sampling means. This needle is inserted into the body to serve as an inlet for blood into the substrate.
- Reference numerals 204 and 205 denote electrodes, and blood is taken into the substrate from the body by the suction force of the electroosmotic flow generated by the voltage applied between the electrodes.
- Reference numeral 206 denotes blood filtering means, which has a plurality of slits whose intervals gradually become narrower from the upstream to the downstream of the blood flow. With this slit, red blood cells, white blood cells, lymphocytes, and platelets in the blood are removed by filtration, and plasma is obtained downstream of the filtration means.
- 2 0 7 is a separated hand It is a step, for example, composed of a U-shaped micro gallery. After the plasma obtained by filtering the collected blood is guided to this U-shaped micro-cabinet.
- Reference numeral 208 denotes an analysis means, which has sensors for measuring blood pH, oxygen, carbon dioxide, sodium, potassium, calcium, glucose, lactate, etc. .
- Reference numeral 209 denotes a channel means for connecting each of the sampling means, the filtration means, the separation means, and the analysis means, and is composed of a micro-cavity made by etching a substrate.
- Reference numeral 210 denotes a moving means for moving blood by electroosmotic flow in a micro gallery.
- Reference numeral 211 denotes output means for extracting information from the analysis means, and is constituted by electrodes and the like.
- Reference numeral 212 denotes control means for controlling the above-mentioned collection means, filtration means, separation means, analysis means, moving means, and output means as necessary.
- a plate for holding blood is provided in a microcapillary on the substrate, and this plate is bonded or pressed to the substrate 201.
- the blood collected by the collection means 202 is filtered by the filtration means 204 to become plasma, and the coagulation factor is separated and removed by the separation means 205 to obtain serum.
- the pH value, oxygen, carbon dioxide, sodium, calcium, calcium, glucose, lactic acid, and other concentrations are measured.
- the movement of blood between each means is performed by a moving means 210 using electrophoresis.
- a method for manufacturing a micro-billary for forming each means in the substrate will be described with reference to FIG.
- a 2 mm square quartz plate 301 having a thickness of 0.5 mm is prepared.
- a chromium (Cr) film 302 is deposited on the quartz plate 301 by about 1 / m2. Deposit by sputtering method with thickness.
- a photo resist 303 is applied on the Cr film 302, and a light-exposed pattern having a width of about 30 ⁇ m is exposed by light exposure.
- the Cr film 302 is etched by a wet or dry method.
- the condition at that time is that the power of 13.56 MHz introduced into the antenna is 500 W, the power of 13.56 MHz for high-frequency noise is 5 W, and the pressure is 1 W 0 mT orr.
- the Cr film 302 was removed by a wet method, and (6) another quartz plate 3 having holes for blood and buffer solution inlets and outlets opened by ultrasonic processing. Prepare 4 and, together with the quartz plate 301 with the cavities, immerse it in 1% HF (hydrofluoric acid), then put both plates together and apply them at a pressure of 1.3 MPa for 24 hours. Pressed.
- an electrode 300 of platinum or the like is formed at the above-mentioned injection port or outlet by a method such as vapor deposition, and a micro-cavity chip comes up.
- a quartz plate with micro-cavity grooves formed in step (4) as a mold, molding was performed at an appropriate temperature on a polymer film such as polyethylene to produce micro-cavity grooves. You may. Further, instead of using a quartz plate, a micro-groovy groove may be formed directly on the polymer plate, and the lid may be formed of a polymer.
- FIG. 1 The microvilillaries used are shown in the graph shown in FIG. This was manufactured by the aforementioned manufacturing method. This figure shows a part of a micro gallery in a quartz plate. The mouth opening is about 30 m wide and 30 m deep. After filling the entire area of the microphone mouth cavity with a phosphate buffer (PBS) having a pH of 7.4, a high voltage is applied between A and C, and the voltage-current characteristics at that time are changed by ion intensity. The measurement results are shown in the graph of FIG.
- PBS phosphate buffer
- FIG. 5 shows a microcavity for which the suction force of the pump action was measured.
- This is an illustration of a part of a quartz plate manufactured by the method described above.
- This micro villa is about 30 m wide and 30 m deep.
- the entire 501 was filled with a phosphate buffer (PBS) having a pH of 7.4.
- PBS phosphate buffer
- the PBS moves toward the electrode A by electroosmotic flow, and air 505 is injected from the entrance C504.
- One side of the U-shaped microcapillaries 601 is connected to the inlet 602 attached with a needle. It also has an electroosmotic pump 603, and is provided with an electrode A604 and an electrode B605 for applying a high voltage. An electric field of about 1 kVcm was applied between the electrode A604 and the electrode B605, and blood was introduced into the U-shaped micro-billary 6001 through the needle 602. At this time, the electrode A604 was grounded to avoid electric shock. Then, a quartz plate 702 including the microphone opening cavities shown in FIG.
- the micro-cabillary which is a component of the structure of the above-mentioned collection means, filtration means, separation means, flow path means, and analysis means, is made of quartz. Therefore, when biological substances such as blood, plasma, and serum are introduced into the microcapillary, the protein coagulates or adheres to the inner wall, and the capillaries flow path becomes narrower, or in extreme cases. The phenomenon of clogging is seen. To prevent this solidification and adhesion, My Kurokiya the inner wall of Vila Li, MPC Horima one (2-methacry 1 oy 1 oxyethy lphosphory 1 chol ine) were co one DOO 0 MPC polymer scratch, Ri by the Ishihara et al.
- Patent No. 2,947,298 this is a polymer artificially synthesized from materials similar to the materials that make up our biological membrane. Therefore, it has an extremely excellent effect of suppressing protein adsorption and preventing undesired reactions with living organisms.
- My Kuroki The width of the villa is about 30 m and the depth is about 30 m.
- the inside of the microcapillaries was filled with a phosphate buffer having a pH of 7.4 and an ionic strength of 0.16.
- a phosphate buffer having a pH of 7.4 and an ionic strength of 0.16.
- Various high electric fields were applied between C and serum was introduced into the cavities.
- the effect of coagulation and adhesion on the flow of serum in the micropillar was due to the strong absorption of the serum at the point E, 4 mm away from the end A of the capillary, at the introduced serum concentration.
- Ultraviolet light of 0 nm was focused and irradiated, and it was determined whether the serum reached point E by its absorption. The measurement was performed for each of the 0.05 wt% concentration coat and the 0.3 wt% concentration coat without the MPC polymer coating.
- the MPC polymer coat compared with the quartz surface, the MPC polymer surface does not generate much negative charge, so the electroosmotic flow is suppressed, and it is expected that the uncoated state will reach the measurement point fastest.
- no coat was the slowest.
- the arrival times of 0.0 5 wt% and 0.3 wt% are not much different.
- the concentration saturates after reaching, whereas it decreases to 0.05 wt% without coating. From these results, it is considered that MPC coating was inadequate when uncoated and at 0.05 wt%, and the protein in serum adhered to the inner wall before reaching the measurement point and was lost.
- ISFET ion sensitive field effect trans.istor
- MOS metal-oxide-semiconductor
- the insulation film of the ISFET which consists of a stack of films, breaks down.
- an electroosmotic pump that applies a high voltage is provided downstream of the micro-cabinet, and the suction action of this pump causes serum and other substances to be supplied to the micro-cabinet located upstream of the pump. He led them and installed a chemical sensor such as ISFET at the location of this micro-cabinet.
- Fig. 9 shows the case where a microcapillary pump area with a length of 11 cm is provided downstream as in (a), and the very short 0.8 cm pump area as in (b). In the case where a region was provided, the movement of serum by the action of electroosmotic flow was compared.
- the width of the microvillage is about 30 m and the depth is about 30 / m.
- FIG. 10 shows the configuration near the analyzing means of the present apparatus.
- 1001, 1002 is an ISFET sensor
- 1003 and 1004 are a glucose sensor and an AgZAgC1 electrode
- 1005 is an electroosmotic pump which is a moving means. Is shown.
- the measurement area of the ISFET sensor is 15 ⁇ m X l 50 m, 30; m width
- a platinum wire glucose sensor with a platinum diameter of 20 ⁇ m was placed along and beneath the microcavity channel, and inserted vertically into the side wall of the microcavity channel.
- Fig. 11 shows the sensor current with respect to changes in the concentration of glucose at different concentrations mixed in bovine serum.
- a glucose sensor was used in which cellulose acetate, glucose oxidase, and ferrocene carboxyaldehyde were sequentially coated on a Pt line with a diameter of 20 m, and the surface of the sensor was MPC poly. Coated with a mar.
- FIG. 11 shows that the current flowing when the glucose concentration is 0 is a dark current, but responds almost linearly to changes in glucose concentration.
- FIG. 12 shows the results of measuring the concentrations of pH, Na +, and K + in bovine serum using an ISFET sensor.
- PH S i 3 4 for the measurement of, N a +
- FIG. 13 shows a configuration of a blood analyzer in which a blood anticoagulant supply device is attached to the blood analyzer of the present invention described in FIG.
- This device as in the example in Fig. 2, first introduces blood into the 1303 micro gallery via the 1302 blood sampling needle on the 1301 quartz substrate. .
- press the anticoagulant sodium citrate, EDTA, heparin
- the anticoagulant sodium citrate, EDTA, heparin
- This serum was then led to the 1307 analytical means by the electroosmotic flow generated by applying an electric field between the 1308 and 1309 electrodes. Detect serum pH, sodium ion concentration, calcium ion concentration, glucose concentration, etc. In the present embodiment, a plurality of these analysis means are provided, and these concentrations can be analyzed at once. When these concentrations in serum were actually examined, the concentrations could be measured with the same accuracy as the measurement results described above.
- FIG. 14 shows a configuration of a blood analyzer in which a blood anticoagulant supply device is attached to the blood analyzer of the present invention described in FIG.
- blood is first introduced into the microbial gallery at 1403 on the quartz substrate at 1401 via the needle for blood collection at 1402, as in the example in Fig. 2. I do.
- press the anticoagulant sodium citrate, EDTA, heparin
- press the rubber stopper of 1405 to prevent blood from coagulating in the cavities. In this case, it may be appropriately supplied to the cavities.
- plasma and blood cells are separated by the filtration means of 1406.
- This plasma was guided to the analysis means of 1407 by the electroosmotic flow generated by applying an electric field between the electrodes of 1408 and 1409, and the pH, Detects the concentration of triion, the concentration of lithium ion, and the concentration of glucose.
- a plurality of such analysis means are provided, and it is possible to analyze these concentrations at once. When these concentrations in blood actually filtered through 1406 were examined, the concentrations could be measured with the same precision as the measurement results described above.
- the blood analyzer according to the present invention is small and is suitable for installation in a general household. Furthermore, the blood analysis method according to the present invention is integrated from blood collection to analysis, and is suitable for use by ordinary people who do not have specialized medical knowledge and qualifications.
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP01912255A EP1267166A4 (en) | 2000-03-15 | 2001-03-12 | BLOOD ANALYSIS PROCESS AND DEVICE |
AU2001241091A AU2001241091A1 (en) | 2000-03-15 | 2001-03-12 | Blood analyzing method and apparatus |
Applications Claiming Priority (2)
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JP2000-120189 | 2000-03-15 | ||
JP2000120189A JP3847053B2 (ja) | 2000-03-15 | 2000-03-15 | 血液分析装置 |
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WO2001069242A1 true WO2001069242A1 (fr) | 2001-09-20 |
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PCT/JP2001/001896 WO2001069242A1 (fr) | 2000-03-15 | 2001-03-12 | Procede et appareil d'analyse de sang |
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US (1) | US20030114785A1 (ja) |
EP (1) | EP1267166A4 (ja) |
JP (1) | JP3847053B2 (ja) |
KR (1) | KR20030004356A (ja) |
AU (1) | AU2001241091A1 (ja) |
WO (1) | WO2001069242A1 (ja) |
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- 2001-03-12 EP EP01912255A patent/EP1267166A4/en not_active Withdrawn
- 2001-03-12 KR KR1020027012030A patent/KR20030004356A/ko not_active Application Discontinuation
- 2001-03-12 AU AU2001241091A patent/AU2001241091A1/en not_active Abandoned
- 2001-03-12 WO PCT/JP2001/001896 patent/WO2001069242A1/ja not_active Application Discontinuation
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021253809A1 (zh) * | 2020-06-19 | 2021-12-23 | 谈斯聪 | 血液采集分析、图像智能识别诊断一体化装置、系统及方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1267166A1 (en) | 2002-12-18 |
JP3847053B2 (ja) | 2006-11-15 |
KR20030004356A (ko) | 2003-01-14 |
AU2001241091A1 (en) | 2001-09-24 |
EP1267166A4 (en) | 2005-11-23 |
US20030114785A1 (en) | 2003-06-19 |
JP2001258868A (ja) | 2001-09-25 |
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