WO2011105178A1 - 分析装置、分析方法及び分析システム - Google Patents
分析装置、分析方法及び分析システム Download PDFInfo
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- WO2011105178A1 WO2011105178A1 PCT/JP2011/052018 JP2011052018W WO2011105178A1 WO 2011105178 A1 WO2011105178 A1 WO 2011105178A1 JP 2011052018 W JP2011052018 W JP 2011052018W WO 2011105178 A1 WO2011105178 A1 WO 2011105178A1
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16B—BIOINFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR GENETIC OR PROTEIN-RELATED DATA PROCESSING IN COMPUTATIONAL MOLECULAR BIOLOGY
- G16B40/00—ICT specially adapted for biostatistics; ICT specially adapted for bioinformatics-related machine learning or data mining, e.g. knowledge discovery or pattern finding
- G16B40/10—Signal processing, e.g. from mass spectrometry [MS] or from PCR
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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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
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/1468—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using chemical or electrochemical methods, e.g. by polarographic means
- A61B5/1473—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using chemical or electrochemical methods, e.g. by polarographic means invasive, e.g. introduced into the body by a catheter
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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
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/1486—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using enzyme electrodes, e.g. with immobilised oxidase
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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
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/1495—Calibrating or testing of in-vivo probes
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16B—BIOINFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR GENETIC OR PROTEIN-RELATED DATA PROCESSING IN COMPUTATIONAL MOLECULAR BIOLOGY
- G16B99/00—Subject matter not provided for in other groups of this subclass
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0242—Operational features adapted to measure environmental factors, e.g. temperature, pollution
Definitions
- the present invention relates to an analysis apparatus, an analysis method, and an analysis system for calculating numerical information related to a specific component in a sample.
- a blood glucose level measurement method there is a method of measuring blood collected from a fingertip or the like with a disposable test piece on which a dry reagent containing an enzyme is placed using a puncture device (for example, Patent Document 1). .
- a method of measuring glucose concentration in extracellular fluid (interstitial fluid) instead of blood using a sensor inserted under the skin for example, Patent Document 2.
- an electrochemical sensor may be used in which an enzyme is immobilized on a sensor part placed under the skin and a specific component in the sample is detected using an enzyme reaction.
- An electrochemical sensor usually includes a working electrode and a counter electrode, and an enzyme (for example, glucose oxidase) is immobilized on the working electrode.
- the glucose concentration is measured based on the response current obtained by continuously applying a constant voltage (for example, about 0.3 to 0.6 V) between the working electrode and the counter electrode.
- the blood glucose level (the glucose concentration value in the blood) is different from the glucose concentration value in the interstitial fluid, it is necessary to correct the glucose concentration value in the interstitial fluid.
- the response current value obtained by the reaction between the interstitial fluid and the enzyme using the glucose concentration value in the blood obtained by measuring the collected blood There is a method of calibrating to the value of glucose concentration in blood.
- Enzyme activity varies depending on the reaction temperature.
- the subcutaneous temperature fluctuates due to changes in the heating and cooling conditions around the subject, such as the living environment of the subject (for example, the outside air temperature) and living events (for example, bathing, exercise).
- the living environment of the subject for example, the outside air temperature
- living events for example, bathing, exercise.
- a change in subcutaneous temperature may affect the measurement result.
- subcutaneous temperature fluctuations may affect the measurement results.
- the interstitial fluid It is possible to appropriately correct the glucose concentration value.
- the difference between the environmental temperature when measuring the response current using a subcutaneously indwelling type electrochemical sensor and the environmental temperature when measuring blood glucose concentration by collecting blood exceeds the allowable range, It becomes difficult to properly correct the value of the glucose concentration in the interstitial fluid.
- the present invention has been made in view of the above circumstances, and a technique capable of obtaining a highly reliable measurement result even under a large fluctuation in environmental temperature when measuring numerical information on a specific substance in a sample. The purpose is to provide.
- the analyzer includes a signal detection unit that continuously detects a signal value detected from a first sample, a measurement unit that measures numerical information regarding a specific substance in a second sample, and the first A first temperature detection unit that captures a first temperature value that is temperature information about the sample; a second temperature detection unit that captures a second temperature value that is temperature information about the second sample; the first temperature value and the second temperature value; A calculation unit that calibrates the signal value to the numerical information related to the specific substance in the first sample by referring to the numerical information related to the specific substance in the second sample according to the temperature value.
- the calculation unit refers to numerical information related to a specific substance in the second sample according to the first temperature value and the second temperature value, and calculates the first sample from a signal value detected from the first sample. Calibrate to numerical information on specific substances in Therefore, even when the temperature variation related to the first sample is large or the temperature variation related to the second sample is large, the reliability of the numerical information related to the specific substance in the first sample can be improved.
- the calculation unit refers to numerical information about the specific substance in the second sample, and calculates the signal value from the signal value. You may calibrate to the numerical information regarding the said specific substance in a 1st sample. Therefore, even when the temperature variation related to the first sample is large or the temperature variation related to the second sample is large, the reliability of the numerical information related to the specific substance in the first sample can be improved.
- the calculation unit changes the second temperature value when the value calculated from the first temperature value and the second temperature value exceeds the predetermined threshold value, and changes the first temperature value and the changed value.
- the numerical information related to the specific substance in the second sample is corrected based on the changed second temperature value, and the corrected value
- the signal value may be calibrated to numerical information related to the specific substance in the first sample. Therefore, even when the temperature variation related to the first sample is large or the temperature variation related to the second sample is large, the first sample is changed by changing the second temperature value which is the temperature information related to the second sample. It is possible to improve the reliability of numerical information related to specific substances in the inside.
- the calculation unit changes the first temperature value and the second temperature value, and the changed value
- a signal value detected from the first sample is calculated based on the changed first temperature value. Correcting, correcting the numerical information related to the specific substance in the second sample based on the changed second temperature value, referring to the numerical information related to the specific substance in the second sample after correction, You may calibrate to the numerical information regarding the said specific substance in the said 1st sample from the said signal value after correction
- the first temperature value which is the temperature information related to the first sample is changed and the temperature related to the second sample is changed.
- the second temperature value, which is temperature information the reliability of the numerical information related to the specific substance in the first sample can be improved.
- the analyzer according to the present invention may further include a notifying unit for notifying predetermined information when a value calculated from the first temperature value and the second temperature value exceeds the predetermined threshold.
- the analyzer according to the present invention may further include a display unit that displays numerical information regarding the specific component in the first sample. When the value calculated from the first temperature value and the second temperature value exceeds the predetermined threshold, the display unit does not display numerical information regarding the specific component in the first sample after calibration. It may be.
- the signal detection unit may be placed in the body.
- the first temperature detector may be disposed between the signal detector and the skin surface. In the calculation unit, the value calculated from the first temperature value and the second temperature value may be a difference between the first temperature value and the second temperature value.
- the value calculated from the first temperature value and the second temperature value includes a change amount per unit time in the first temperature value and a change amount per unit time in the second temperature value. And the larger of the difference between the average value of the first temperature values and the average value of the second temperature values.
- the present invention can also be understood as an analysis method or an analysis system. That is, the analysis method according to the present invention includes a signal detection step of continuously detecting a signal value detected from a first sample, a measurement step of measuring numerical information regarding a specific substance in a second sample, and the first A first temperature detecting step that captures a first temperature value that is temperature information related to the sample; a second temperature detecting step that captures a second temperature value that is temperature information related to the second sample; the first temperature value and the second temperature value; A calculation step of calibrating the signal value to the numerical information related to the specific substance in the first sample by referring to the numerical information related to the specific substance in the second sample according to the temperature value.
- the analysis method according to the present invention may further include a notification step of notifying predetermined information when a value calculated from the first temperature value and the second temperature value exceeds the predetermined threshold value.
- the analysis method according to the present invention may further include a display step for displaying numerical information related to the specific component in the first sample. In the display step, when the value calculated from the first temperature value and the second temperature value exceeds the predetermined threshold value, numerical information regarding the specific component in the first sample after calibration is not displayed. It may be.
- the signal detection step may be executed by a signal detection unit placed in the body.
- the first temperature detection step may be executed by a first temperature detection unit disposed between the signal detection unit and the skin surface.
- the value calculated from the first temperature value and the second temperature value may be a difference between the first temperature value and the second temperature value.
- the value calculated from the first temperature value and the second temperature value is a change amount per unit time in the first temperature value and a change amount per unit time in the second temperature value. And the larger of the difference between the average value of the first temperature values and the average value of the second temperature values.
- An analysis system includes a signal detection unit that continuously detects a signal value detected from a first sample, a first temperature detection unit that captures a first temperature value that is temperature information about the first sample, A detection device having: an analyzer having a measurement unit that measures numerical information related to a specific component in a second sample; a display device having a display unit that displays numerical information related to the specific component in the first sample; Consists of The analysis system according to the present invention includes a second temperature detection unit that captures a second temperature value that is temperature information about the second sample, and the second temperature detection unit according to the first temperature value and the second temperature value.
- a calculation unit that refers to numerical information relating to the specific component in the sample and calibrates the signal value detected from the first sample to numerical information relating to the specific component in the first sample.
- the signal detection unit may be placed in the body.
- the first temperature detector may be disposed between the signal detector and the skin surface.
- the value calculated from the first temperature value and the second temperature value may be a difference between the first temperature value and the second temperature value.
- the value calculated from the first temperature value and the second temperature value includes a change amount per unit time in the first temperature value and a change amount per unit time in the second temperature value. And the larger of the difference between the average value of the first temperature values and the average value of the second temperature values.
- a program includes a signal detection step for continuously detecting a signal value detected from a first sample, a measurement step for measuring numerical information about a specific substance in a second sample, and the first step.
- a first temperature detecting step that captures a first temperature value that is temperature information related to the sample; a second temperature detecting step that captures a second temperature value that is temperature information related to the second sample; the first temperature value and the second temperature value; According to the temperature value, referring to numerical information related to the specific substance in the second sample, a calculation step of calibrating the signal value to numerical information related to the specific substance in the first sample is executed.
- the computer-readable recording medium may record the program.
- the analysis device and the display device may be configured as an integrated device or as separate devices.
- the second temperature detection unit may be provided in any one or both of the analysis device and the display device.
- the present invention may be a program that causes a computer, other devices, machines, or the like to realize any of the functions described above. Further, the present invention may be a program in which such a program is recorded on a computer-readable recording medium.
- FIG. 1 is a schematic configuration diagram of an analysis system according to the first embodiment.
- FIG. 2 is a schematic configuration diagram of the detection apparatus 2 according to the first embodiment.
- FIG. 3 is an overall perspective view of the electrochemical sensor 12 according to the first embodiment and an enlarged view of the signal detection unit 13.
- FIG. 4 is an overall perspective view and an enlarged view of a main part of the electrochemical sensor 12 according to the first embodiment.
- FIG. 5 is a functional configuration diagram of the detection device 2 according to the first embodiment.
- FIG. 6A is graph data showing a change in the response current value continuously detected by the signal detection unit 13.
- FIG. 6B is graph data showing a change in the first temperature value detected by the temperature detection unit 14.
- FIG. 7 is a schematic configuration diagram of the display device 3 according to the first embodiment.
- FIG. 8 is a functional configuration diagram of the display device 3 according to the first embodiment.
- FIG. 9 is a schematic configuration diagram of the measuring apparatus 4 according to the first embodiment.
- FIG. 10 is a partial cross-sectional view of the measuring apparatus 4 according to the first embodiment.
- FIG. 11 is an overall perspective view of the biosensor 60 according to the first embodiment.
- FIG. 12 is a functional configuration diagram of the measuring apparatus 4 according to the first embodiment.
- FIG. 13 is a diagram illustrating a flow of calibration processing of the measurement result of the first sample.
- FIG. 14 is a diagram showing a flow of calibration processing of the measurement result of the first sample.
- FIG. 15 is a diagram illustrating a flow of calibration processing of the measurement result of the first sample.
- FIG. 16 is a schematic configuration diagram of the detection apparatus 2 according to the second embodiment.
- FIG. 17 is a schematic configuration diagram of the display device 3 according to the third embodiment.
- FIG. 1 is a schematic configuration diagram of an analysis system 1 according to the first embodiment.
- the analysis system 1 shown in FIG. 1 includes a detection device 2, a display device 3, and a measurement device 4.
- the detection device 2 can continuously measure the concentration of a specific substance in a sample in the body.
- the sample include body fluids such as blood and interstitial fluid, and substrate-containing fluids other than body fluids.
- specific substances include glucose, lactic acid, and bile acids.
- a sample in the body is also referred to as a first sample.
- the detection device 2 can be used by being attached to, for example, the abdomen or shoulder skin of a human body.
- the display device 3 can display the measurement result of the detection device 2.
- the detection device 2 and the display device 3 can perform data communication wirelessly or by wire.
- the measuring device 4 can measure the concentration of the specific substance in the sample taken out of the body.
- the sample include body fluids such as blood and interstitial fluid, and substrate-containing fluids other than body fluids.
- specific substances include glucose, lactic acid, and bile acids.
- the sample taken out of the body is also referred to as a second sample.
- the measuring device 4 is configured to be portable, and the display device 3 and the measuring device 4 can perform data communication wirelessly or by wire.
- FIG. 2 is a schematic configuration diagram of the detection apparatus 2 according to the first embodiment.
- the detection device 2 includes a housing 10, a circuit board 11, an electrochemical sensor 12, a signal detection unit 13, and a temperature detection unit 14.
- the housing 10 has a cover 15 and a substrate 16.
- the circuit board 11 is accommodated in a space defined by the cover 15 and the board 16.
- the housing 10 is preferably waterproof or water resistant.
- the cover 15 and the substrate 16 may be made of a material with extremely low water permeability such as metal or polypropylene resin.
- the substrate 16 is a part through which the electrochemical sensor 12 is inserted, and a part of the electrochemical sensor 12 is fixed.
- An adhesive film 17 is fixed to the substrate 16.
- the adhesive film 17 is used when the detection device 2 is fixed to the skin 18.
- the circuit board 11 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like necessary for a predetermined operation (for example, voltage application or communication with the outside) of the detection device 2.
- the electronic parts are mounted.
- the circuit board 11 includes a terminal 19 for electrical connection with the electrochemical sensor 12.
- the terminal 19 is used to apply a voltage to the signal detection unit 13 and obtain a signal value (for example, a response current value) from the signal detection unit 13.
- a signal detector 13 and a temperature detector 14 are provided at the tip of the electrochemical sensor 12.
- a part of the electrochemical sensor 12 protrudes from the skin 18 and contacts the terminal 19 of the circuit board 11.
- a part of the electrochemical sensor 12 is in the body (in the skin 18) together with the signal detection unit 13 and the temperature detection unit 14. Detained.
- FIG. 3 is an overall perspective view of the electrochemical sensor 12 according to the first embodiment and an enlarged view of the signal detection unit 13.
- FIG. 4 is an overall perspective view and an enlarged view of a main part of the electrochemical sensor 12 according to the first embodiment.
- the electrochemical sensor 12 includes a signal detection unit 13, a temperature detection unit 14, a substrate 20, lead wires 21 and 22, and terminals 23 and 24.
- the substrate 20 has insulating properties and flexibility.
- An end portion 20 ⁇ / b> A of the substrate 20 is accommodated in the housing 10.
- the end 20 ⁇ / b> B of the substrate 20 is inserted into the skin 18.
- the end 20B of the substrate 20 may have a sharp shape.
- the signal detection unit 13 includes an electrode 25 and a reagent layer 26.
- the electrode 25 is formed on the upper surface of the substrate 20 and includes a working electrode 25A and a counter electrode 25B.
- the working electrode 25A is a part that exchanges electrons with a specific substance in the first sample.
- the counter electrode 25B is used for voltage application together with the working electrode 25A.
- the electrode 25 can be formed, for example, by screen printing using carbon ink.
- a lead wire 21 is connected to the working electrode 25A and the counter electrode 25B, and a terminal 23 is connected to the other end of the lead wire 21.
- the lead wire 21 transmits information detected by the signal detection unit 13 to the circuit board 11.
- the terminal 23 of the board 20 is in contact with the terminal 19 of the circuit board 11.
- the temperature detection unit 14 is a sensor for detecting the environmental temperature in the vicinity of the signal detection unit 13, and is provided at a position in the vicinity of the signal detection unit 13 on the lower surface of the substrate 20. Further, the temperature detection unit 14 may be provided in the vicinity of the signal detection unit 13 on the upper surface of the substrate 20. Since the specific substance in the first sample undergoes an enzyme reaction in the reagent layer 26, the environmental temperature in the vicinity of the signal detection unit 13 can also be referred to as a temperature related to the first sample. In this specification, the temperature information regarding the first sample is also referred to as a first temperature value.
- One end of a lead wire 22 is connected to the temperature detection unit 14, and a terminal 24 is connected to the other end of the lead wire 22.
- the lead wire 22 transmits the first temperature value continuously detected by the temperature detection unit 14 to the circuit board 11.
- various known sensors can be used in addition to the thermistor.
- the temperature detection unit 14 is provided at a position near the signal detection unit 13, but the present embodiment is not limited to this.
- the temperature detector 14 may be provided between the signal detector 13 and the surface of the skin 18. Between the signal detection unit 13 and the surface of the skin 18, the same position as the position where the signal detection unit 13 is provided in the depth direction of the skin 18 is included. Therefore, the temperature detector 14 may be provided at the same position as the position where the signal detector 13 is provided in the depth direction of the skin 18. Further, the surface of the skin 18 is included between the signal detection unit 13 and the surface of the skin 18. Therefore, the temperature detection unit 14 may be provided on the surface of the skin 18. When the temperature detection unit 14 is provided on the surface of the skin 18, the temperature detected by the temperature detection unit 14 substantially matches the surface temperature of the skin 18.
- FIG. 5 is a functional configuration diagram of the detection device 2 according to the first embodiment.
- the detection device 2 includes a communication unit 30, a power supply unit 31, a control unit 32, a storage unit 33, a signal measurement unit 34, and a temperature measurement unit 35.
- the communication unit 30 performs data communication between the detection device 2 and the display device 3.
- wireless communication means IrDA using infrared rays or Bluetooth using a 2.4 GHz frequency band
- the data communication may be performed by wire by connecting the detection device 2 and the display device 3 via a cable such as USB (Universal Serial Bus).
- the power supply unit 31 supplies power for driving the detection device 2.
- the function as the power supply unit 31 may be realized by using a button battery having a power supply voltage of 1 to 3V.
- the temperature measurement unit 35 stores information on the change in the first temperature value detected by the temperature detection unit 14 in the storage unit 33 together with the elapsed time information.
- FIG. 6B is graph data showing a change in the first temperature value detected by the temperature detection unit 14. The vertical axis in FIG. 6B indicates the first temperature value, and the horizontal axis in FIG. 6B indicates the elapsed time.
- the temperature measurement unit 35 may store the graph data illustrated in FIG. 6B in the storage unit 33.
- information related to the change in the first temperature value detected by the temperature detection unit 14 is also referred to as change information about the first temperature value.
- the control unit 32, the storage unit 33, the signal measurement unit 34, and the temperature measurement unit 35 can be realized by a computer including a CPU, a RAM, a ROM, and the like, each device, a program executed on the computer, and the like.
- FIG. 7 is a schematic configuration diagram of the display device 3 according to the first embodiment.
- the display device 3 includes a CPU 40 that controls the display device 3 by executing the computer program, a memory 41 that stores a computer program executed by the CPU 40 and data processed by the CPU 40, and an interface 42 that connects the CPU 40 and various devices.
- the input device 43 and the output device 44 are provided.
- the memory 41 is, for example, a RAM and a ROM.
- the interface 42 may be either a serial interface such as Universal Serial Bus (USB) or a parallel interface such as Peripheral Component Interconnect (PCI).
- the input device 43 is, for example, an operation button, but may be a contact type touch panel.
- the output device 44 is, for example, a liquid crystal display device, a plasma display panel, a Cathode Ray Ray Tube (CRT), an electroluminescence panel, or the like.
- FIG. 8 is a functional configuration diagram of the display device 3 according to the first embodiment.
- the display device 3 includes a communication unit 50, a power supply unit 51, a control unit 52, a calculation unit 53, a display unit 54, a notification unit 55, and a storage unit 56.
- the communication unit 50 performs data communication between the detection device 2 and the display device 3.
- the communication unit 50 performs data communication between the display device 3 and the measurement device 4.
- wireless communication means IrDA using infrared rays or Bluetooth using a 2.4 GHz frequency band
- the data communication may be performed by wire by connecting the detection device 2 and the display device 3 via a cable such as USB (Universal Serial Bus).
- the display unit 54 displays various kinds of information such as numerical information related to the specific substance in the first sample and numerical information related to the specific substance in the second sample.
- the numerical information regarding the specific substance includes, for example, numerical information for quantitatively evaluating the specific substance such as the concentration and amount of the specific substance, and numerical information for qualitatively evaluating the specific substance.
- the display unit 54 can be realized by a computer including the CPU 40, the memory 41, the output device 44, and the like, each device, a program executed on the computer, and the like.
- the notification unit 55 notifies predetermined information.
- the storage unit 56 stores programs necessary for various calculations and various data (for example, various data acquired from the detection device 2 and various data acquired from the measurement device 4).
- the storage unit 56 stores calibration curve data indicating the correspondence between the first current value and the concentration of the specific substance in the first sample.
- the calibration curve data is stored in the storage unit 56 as, for example, a mathematical expression or a correspondence table.
- a plurality of calibration curve data are prepared according to the first temperature value, and a plurality of calibration curve data are stored in the storage unit 56 according to the first temperature value.
- the control unit 52, the calculation unit 53, the notification unit 55, and the storage unit 56 can be realized by a computer including the CPU 40, the memory 41, and the like, each device, a program executed on the computer, and the like.
- FIG. 9 is a schematic configuration diagram of the measuring apparatus 4 according to the first embodiment.
- FIG. 10 is a partial cross-sectional view of the measuring apparatus 4 according to the first embodiment.
- the measuring device 4 uses the biosensor 60 to measure the second sample by an electrochemical method.
- the measuring device 4 includes a housing 61, a display panel 62, operation buttons 63, a connector part 64, a terminal 65, a temperature detection part 66, a lead wire 67, and a sensor insertion port 68.
- the measuring device 4 is equipped with electronic components such as a CPU, RAM, and ROM necessary for a predetermined operation of the measuring device 4 (for example, application of voltage or communication with the outside). Circuit board.
- the measurement unit 83 selects calibration curve data corresponding to the second temperature value at the time when the second current is measured, from the plurality of calibration curve data stored in the storage unit 84. Then, the measurement unit 83 measures the concentration value of the specific substance in the second sample by applying the second current value to the selected calibration curve data.
- ⁇ Calibration process> The user of the system measures the first sample using the detection device 2 and measures the second sample using the measurement device 4. Based on the measurement result of the second sample, the measurement result of the first sample is calibrated.
- the calibration of the measurement result of the first sample is performed during the initial measurement of the first sample by the detection device 2 or while the first measurement of the first sample by the detection device 2 is being performed.
- the measurement result of the first sample may be calibrated at least once a day. preferable.
- Steps S07, S08, and S09 in the processing flow shown in FIG. 13 may be modified as follows.
- FIG. 14 is a diagram showing a flow of calibration processing of the measurement result of the first sample.
- processing different from the processing flow shown in FIG. 13 is performed in step 07A, step S08A, and step 09A. Therefore, differences between FIG. 13 and FIG. 14 will be described, and processing similar to the processing flow shown in FIG. 13 will be denoted by the same reference numerals as in FIG. 13 and detailed description thereof will be omitted.
- the calculation unit 53 performs the processing from step S01 to step S05 of the processing flow shown in FIG. 14, and the calculation unit 53 is in a state of proceeding to the processing of step S07A in FIG.
- the absolute value (2 ° C) of the difference between the first temperature value (+ 22 ° C) at the time when the second current is measured and the changed second temperature value (+ 20 ° C) is equal to or less than a predetermined threshold value (8 ° C). It is. If the absolute value of the difference between the first temperature value at the time when the second current is measured and the second temperature value after the change is equal to or less than a predetermined threshold, the second temperature value after the change is + 20 ° C. Other values may be used.
- step S08A of FIG. 14 the calculation unit 53 corrects the concentration value of the specific substance in the second sample based on the changed second temperature value.
- the storage unit 56 stores calibration curve data indicating the correspondence between the second current value and the concentration of the specific substance in the second sample.
- the calibration curve data is stored in the storage unit 56 as, for example, a mathematical expression or a correspondence table.
- a plurality of calibration curve data are prepared according to the second temperature value, and the plurality of calibration curve data are stored in the storage unit 56 according to the second temperature value.
- the calculation unit 53 selects calibration curve data corresponding to the changed second temperature value from among the plurality of calibration curve data. Then, the calculation unit 53 calculates the concentration of the specific substance in the second sample by applying the second current value to the selected calibration curve data. The calculating unit 53 uses the calculated concentration of the specific substance in the second sample as the corrected concentration of the specific substance in the second sample.
- the calculation unit 53 proceeds to the processing in step S07A in FIG. Instead, if the difference information exceeds a predetermined threshold in the processing flow shown in FIG. 14 (NO in step S05 in FIG. 14), the calculation unit 53 does not proceed to the processing in step S07A in FIG.
- the processing flow shown in FIG. That is, in the processing flow shown in FIG. 14, when the difference information exceeds a predetermined threshold (NO in step S05 in FIG. 14), the calibration processing by the calculation unit 53 may not be performed.
- step S07B the calculation unit 53 changes the first temperature value at the time when the second current is measured and the second temperature value at the time when the second current is measured.
- the calculation unit 53 at the time when the second current is measured so that the absolute value of the difference between the changed first temperature value and the changed second temperature value is not more than a predetermined threshold value.
- the second temperature value at the time when the first temperature value and the second current are measured is changed.
- the absolute value (6 ° C.) of the difference between the changed first temperature value (+ 24 ° C.) and the changed second temperature value (+ 30 ° C.) is not more than a predetermined threshold (8 ° C.). If the absolute value of the difference between the changed first temperature value and the changed second temperature value is equal to or less than a predetermined threshold, the changed first temperature value is a value other than + 24 ° C. Alternatively, the changed second temperature value may be a value other than + 30 ° C.
- the display unit 54 displays the concentration value of the specific substance in the first sample after calibration as a value indicating the blood glucose level or the concentration value of the specific substance in the sample taken out of the body.
- the display unit 54 of the display device 4 displays the measurement result of the detection device 2 so that the user of the system and the subject can easily recognize the blood glucose level of the subject.
- the predetermined information there is information that the first temperature value at the time when the second current is measured is significantly different from the second temperature value at the time when the second current is measured.
- Information that the first temperature value at the time when the second current is measured and the second temperature value at the time when the second current is greatly different is also referred to as first information in this specification.
- the notification unit 55 notifies the first information of the first temperature value at the time when the second current is measured and the first time at the time when the second current is measured to the user and the subject of the analysis system. It can be recognized that the two temperature values are greatly different. In this case, the notification unit 55 notifies the first information, and the calculation unit 53 performs a calibration process.
- the predetermined information there is information that the first temperature value at the time when the second current is measured and the second temperature value at the time when the second current are greatly different, so that calibration cannot be performed. is there.
- information that calibration cannot be performed because the first temperature value at the time when the second current is measured and the second temperature value at the time when the second current is measured are greatly different from each other in this specification.
- the notification unit 55 can notify the user of the analysis system or the subject that calibration cannot be performed by notifying the second information. In this case, the second information is notified by the notification unit 55, but the calibration process by the calculation unit 55 is not performed.
- the measurement of the second sample is performed again. There is information to encourage. Since the first temperature value at the time when the second current is measured is greatly different from the second temperature value at the time when the second current is measured, information prompting the second sample to be measured again is described in this specification. This is also referred to as third information.
- the notification unit 55 notifies the third information, thereby allowing the user of the analysis system or the subject to measure the second sample again. In this case, the third information is notified by the notification unit 55, but the calibration process by the calculation unit 55 is not performed.
- Example 2 A second example of the analysis system according to this embodiment will be described.
- Example 1 the example which provided the temperature detection part 14 in the electrochemical sensor 12 of the detection apparatus 2 was shown.
- Example 2 an example in which the temperature detection unit 14 is provided in the electrochemical sensor 12 of the detection device 2 and the temperature detection unit 90 is provided in the detection device 2 will be described.
- FIG. 16 is a schematic configuration diagram of the detection apparatus 2 according to the second embodiment.
- symbol same as Example 1 is attached
- the detection device 2 includes a housing 10, a circuit board 11, an electrochemical sensor 12, a signal detection unit 13, and a temperature detection unit 14, and further includes a temperature detection unit 90. Similar to the first embodiment, the housing 10 includes a cover 15 and a substrate 16. The temperature detection unit 90 is provided in a notch portion of the substrate 16. When the temperature detection unit 90 is disposed in the notch portion of the substrate 16, the temperature detected by the temperature detection unit 90 substantially matches the surface temperature of the skin 18.
- the position at which the temperature detection unit 90 is disposed is not limited to the cutout portion of the substrate 16, and may be, for example, the upper surface or lower surface of the housing 10, the upper surface or lower surface of the circuit board 11, or the upper surface or lower surface of the substrate 16. . That is, the temperature detection unit 90 may be provided at an arbitrary position inside the detection device 2.
- the temperature detection unit 90 is connected to the circuit board 11 via a lead wire.
- the temperature value continuously detected by the temperature detection unit 90 is transmitted to the circuit board 11.
- the temperature detector 90 for example, various known sensors can be used in addition to the thermistor.
- the temperature measurement unit 35 provided in the detection device 2 compares the first temperature value detected by the temperature detection unit 14 with the temperature value detected by the temperature detection unit 90. Then, the temperature measurement unit 35 determines whether or not the absolute value of the difference between the first temperature value detected by the temperature detection unit 14 and the temperature value detected by the temperature detection unit 90 is included in the predetermined range. To do.
- the predetermined range is stored in the storage unit 33.
- the predetermined range is a value that can be arbitrarily changed. For example, 1.0 ° C. to 3.0 ° C. or 1.5 ° C. to 2.0 ° C. can be set as the predetermined range. It is not limited to.
- the temperature measurement unit 35 displays warning information.
- the predetermined range is 1.5 to 2.0 ° C.
- the absolute value of the difference between the first temperature value detected by the temperature detection unit 14 and the temperature value detected by the temperature detection unit 90 is 4.
- the temperature measurement unit 35 transmits warning information to the notification unit 55.
- the notification unit 55 that has received the warning information notifies the warning information.
- the notification unit 55 may display warning information on the display unit 54.
- reporting part 55 may alert
- the temperature measurement unit 35 detects that the absolute value of the difference between the first temperature value detected by the temperature detection unit 14 and the temperature value detected by the temperature detection unit 90 is not included in the predetermined range. Can do. That is, the temperature measuring unit 35 can detect that the electrochemical sensor 12 is not inserted into the skin 18 or that the electrochemical sensor 12 is poorly inserted into the skin 18. And the alerting
- FIG. 17 is a schematic configuration diagram of the display device 3 according to the third embodiment.
- symbol same as Example 1 and Example 2 is attached
- subjected and the description is abbreviate
- the calculation unit 53 of the display device 3 stores information on the change in the temperature value detected by the temperature detection unit 100 in the storage unit 56 together with the elapsed time information.
- the calculation unit 53 of the display device 3 may calibrate the measurement result of the first sample by the detection device 2 by using the temperature value detected by the temperature detection unit 100 instead of the second temperature value.
- the temperature detection unit 66 is provided in the measurement device 4 and the temperature detection unit 100 is provided in the display device 3.
- the present embodiment is not limited to this.
- the temperature detector 100 may be provided in the display device 3 and the temperature detector 66 may not be provided in the measuring device 4.
- the calculation unit 53 of the display device 3 calibrates the measurement result of the first sample by the detection device 2, but the present embodiment is not limited to this.
- the detection device 2 may include a calculation unit similar to the calculation unit 53 of the display device 3. Then, the calculation unit of the detection device 2 may calibrate the measurement result of the first sample by the detection device 2.
- the calculation unit of the detection device 2 can be realized by a computer including a CPU, a RAM, a ROM, and the like mounted on the circuit board 11 of the detection device 2, each device, a program executed on the computer, and the like.
- the measurement device 4 may have a calculation unit similar to the calculation unit 53 of the display device 3. Then, the calculation unit of the measurement device 4 may calibrate the measurement result of the first sample by the detection device 2.
- the analysis system including the detection device 2, the display device 3, and the measurement device 4 has been described as an example, but the present embodiment is not limited to this. You may comprise as an analyzer provided with the detection apparatus 2, the display apparatus 3, and the measuring apparatus 4. FIG. Further, the detection device 2, the display device 3, and the measurement device 4 may be configured as an integrated device.
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Abstract
Description
システムの使用者は、検出装置2を用いて、第1試料の測定を行い、測定装置4を用いて、第2試料の測定を行う。第2試料の測定結果に基づいて、第1試料の測定結果の校正が実施される。第1試料の測定結果の校正は、検出装置2による第1試料の初期測定の際、又は、検出装置2による第1試料の連続測定が行われている間に実施される。検出装置2による第1試料の測定結果と、測定装置4による第2試料の測定結果のずれを考慮すると、1日に最低1回は、第1試料の測定結果の校正が実施されることが好ましい。システムの使用者によって測定装置4が操作され、測定装置4から表示装置3に校正開始の信号が送られることにより、第1試料の測定結果の校正が開始される。また、測定装置4は、バイオセンサ60のキャピラリ75に第2試料が導入され、第2電流値が測定された場合、表示装置3に校正開始の信号を送信するようにしてもよい。
図13に示す処理フローのステップS07、ステップS08及びステップS09を以下のように変形してもよい。図14は、第1試料の測定結果の校正処理のフローを示す図である。図14に示す処理フローでは、ステップ07A、ステップS08A及びステップ09Aにおいて、図13に示す処理フローと異なる処理を行っている。そこで、図13と図14との相違点を説明し、図13に示す処理フローと同様の処理については、図13と同一の参照番号を付すことでその詳細な説明は省略する。以下では、算出部53は、図14に示す処理フローのステップS01からステップS05の処理を行い、算出部53は、図14のステップS07Aの処理に進んだ状態にある。
図13に示す処理フローのステップS07、ステップS08及びステップS09を以下のように変形してもよい。図15は、第1試料の測定結果の校正処理のフローを示す図である。図15に示す処理フローでは、ステップ07B、ステップS08B及びステップ09Bにおいて、図13に示す処理フローと異なる処理を行っている。そこで、図13と図15との相違点を説明し、図13に示す処理フローと同様の処理については、図13と同一の参照番号を付すことでその詳細な説明は省略する。以下では、算出部53は、図15に示す処理フローのステップS01からステップS05の処理を行い、算出部53は、図15のステップS07Bの処理に進んだ状態にある。
算出部53は、検出装置2から、第1電流値を連続的に受信するとともに、算出部53は、記憶部56に第1電流値を記憶する。算出部53は、第2電流が測定された時刻における第1電流値と、校正後の第1試料中の特定物質の濃度値とに基づいて、第2電流が測定された時刻以降の第1電流値から第1試料中の特定物質の濃度値に校正する。そして、算出部53は、校正後の第1試料中の特定物質の濃度値を、血糖値又は体外に取り出した試料中の特定物質の濃度値を示す値として、表示部54に表示する。すなわち、表示部54は、血糖値又は体外に取り出した試料中の特定物質の濃度値を示す値として、校正後の第1試料中の特定物質の濃度値を表示する。表示装置4の表示部54が、検出装置2の測定結果を表示することにより、システムの使用者や被検者に、被検者の血糖値を容易に認識させることができる。
以下において、報知部55による報知処理の条件、すなわち、報知部55が所定の情報を報知するタイミングについて説明する。また、所定の情報の具体的な内容について説明する。まず、報知部55による報知処理の条件について説明する。例えば、図13、図14又は図15に示す処理フローにおいて、差分情報が所定の閾値を越える場合(図13、図14又は図15のステップS05でNO)、報知部55は、所定の情報を報知する。報知部55は、表示部54に所定の情報を表示してもよい。また、報知部55は、音声出力装置を用いて、所定情報を音声として報知してもよい。
第1試料の測定が実施される環境温度と、第2試料の測定が実施される環境温度との間に一定以上の乖離がない場合、第1試料の測定結果の校正が行われる。したがって、第1試料の測定が実施される環境温度の変動が大きい場合や、第2試料の測定が実施される環境温度の変動が大きい場合であっても、第1試料の測定に際して、信頼性の高い測定結果を得ることができる。
以上に説明した本実施形態における何れかの機能は、コード化されてコンピュータ可読媒体の記憶領域に格納されていても良い。この場合、その機能を実現するためのプログラムが、このコンピュータ可読媒体を介して、コンピュータ、又は、機械若しくは装置に組み込まれたコンピュータに、提供され得る。コンピュータ、又は、機械若しくは装置に組み込まれたコンピュータは、コンピュータ可読媒体の記憶領域からプログラムを読み出してそのプログラムを実行することによって、その機能を実現することができる。
2 検出装置
3 表示装置
4 測定装置
12 電気化学センサ
13 信号検出部
14、66、90、100 温度検出部
30、50、80 通信部
31、51、81 電源部
32、52、82 制御部
33、56、84 記憶部
53 算出部
54 表示部
55 報知部
83 測定部
Claims (15)
- 第1試料から検出される信号値を連続的に検出する信号検出部と、
第2試料中の特定物質に関する数値情報を測定する測定部と、
前記第1試料に関する温度情報である第1温度値を捉える第1温度検出部と、
前記第2試料に関する温度情報である第2温度値を捉える第2温度検出部と、
前記第1温度値及び前記第2温度値に応じて、前記第2試料中の特定物質に関する数値情報を参照して、前記信号値から前記第1試料中の前記特定物質に関する数値情報に校正する算出部と、
を備える分析装置。 - 前記算出部は、前記第1温度値と前記第2温度値とから算出した値が所定の閾値以下の場合、前記第2試料中の特定物質に関する数値情報を参照して、前記信号値から前記第1試料中の前記特定物質に関する数値情報に校正する、請求項1に記載の分析装置。
- 前記算出部は、前記第1温度値と前記第2温度値とから算出した値が前記所定の閾値を越えた場合、前記第1温度値を変更し、変更後の前記第1温度値と前記第2温度値とから算出した値が前記所定の閾値以下の場合、変更後の前記第1温度値に基づいて、前記第1試料から検出される信号値を補正し、前記第2試料中の特定物質に関する数値情報を参照して、補正後の前記信号値から前記第1試料中の前記特定物質に関する数値情報に校正する、請求項1又は2に記載の分析装置。
- 前記算出部は、前記第1温度値と前記第2温度値とから算出した値が前記所定の閾値を越えた場合、前記第2温度値を変更し、前記第1温度値と変更後の前記第2温度値とから算出した値が前記所定の閾値以下の場合、変更後の前記第2温度値に基づいて、前記第2試料中の前記特定物質に関する数値情報を補正し、補正後の前記第2試料中の特定物質に関する数値情報を参照して、前記信号値から前記第1試料中の前記特定物質に関する数値情報に校正する、請求項1又は2に記載の分析装置。
- 前記算出部は、前記第1温度値と前記第2温度値とから算出した値が前記所定の閾値を越えた場合、前記第1温度値及び前記第2温度値を変更し、変更後の前記第1温度値と変更後の前記第2温度値とから算出した値が前記所定の閾値以下の場合、変更後の前記第1温度値に基づいて、前記第1試料から検出される信号値を補正し、変更後の前記第2温度値に基づいて、前記第2試料中の前記特定物質に関する数値情報を補正し、補正後の前記第2試料中の特定物質に関する数値情報を参照して、補正後の前記信号値から前記第1試料中の前記特定物質に関する数値情報に校正する、請求項1又は2に記載の分析装置。
- 第1試料から検出される信号値を連続的に検出する信号検出ステップと、
第2試料中の特定物質に関する数値情報を測定する測定ステップと、
前記第1試料に関する温度情報である第1温度値を捉える第1温度検出ステップと、
前記第2試料に関する温度情報である第2温度値を捉える第2温度検出ステップと、
前記第1温度値及び前記第2温度値に応じて、前記第2試料中の特定物質に関する数値情報を参照して、前記信号値から前記第1試料中の前記特定物質に関する数値情報に校正する算出ステップと、
を備える分析方法。 - 前記算出ステップは、前記第1温度値と前記第2温度値とから算出した値が所定の閾値以下の場合、前記第2試料中の特定物質に関する数値情報を参照して、前記信号値から前記第1試料中の前記特定物質に関する数値情報に校正する、請求項6に記載の分析方法。
- 前記算出ステップは、前記第1温度値と前記第2温度値とから算出した値が前記所定の閾値を越えた場合、前記第1温度値を変更し、変更後の前記第1温度値と前記第2温度値とから算出した値が前記所定の閾値以下の場合、変更後の前記第1温度値に基づいて、前記第1試料から検出される信号値を補正し、前記第2試料中の特定物質に関する数値情報を参照して、補正後の前記信号値から前記第1試料中の前記特定物質に関する数値情報に校正する、請求項6又は7に記載の分析方法。
- 前記算出ステップは、前記第1温度値と前記第2温度値とから算出した値が前記所定の閾値を越えた場合、前記第2温度値を変更し、前記第1温度値と変更後の前記第2温度値とから算出した値が前記所定の閾値以下の場合、変更後の前記第2温度値に基づいて、前記第2試料中の前記特定物質に関する数値情報を補正し、補正後の前記第2試料中の特定物質に関する数値情報を参照して、前記信号値から前記第1試料中の前記特定物質に関する数値情報に校正する、請求項6又は7に記載の分析方法。
- 前記算出ステップは、前記第1温度値と前記第2温度値とから算出した値が前記所定の閾値を越えた場合、前記第1温度値及び前記第2温度値を変更し、変更後の前記第1温度値と変更後の前記第2温度値とから算出した値が前記所定の閾値以下の場合、変更後の前記第1温度値に基づいて、前記第1試料から検出される信号値を補正し、変更後の前記第2温度値に基づいて、前記第2試料中の前記特定物質に関する数値情報を補正し、補正後の前記第2試料中の特定物質に関する数値情報を参照して、補正後の前記信号値から前記第1試料中の前記特定物質に関する数値情報に校正する、請求項6又は7に記載の分析方法。
- 第1試料から検出される信号値を連続的に検出する信号検出部と、前記第1試料に関する温度情報である第1温度値を捉える第1温度検出部と、を有する検出装置と、
第2試料中の特定成分に関する数値情報を測定する測定部を有する分析装置と、
前記第1試料中の前記特定成分に関する数値情報を表示する表示部を有する表示装置と、
から構成された分析システムであって、
前記第2試料に関する温度情報である第2温度値を捉える第2温度検出部と、
前記第1温度値及び前記第2温度値に応じて、前記第2試料中の特定成分に関する数値情報を参照して、前記第1試料から検出される信号値から、前記第1試料中の前記特定成分に関する数値情報に校正する算出部と、
を備える分析システム。 - 前記算出部は、前記第1温度値と前記第2温度値とから算出した値が所定の閾値以下の場合、前記第2試料中の特定物質に関する数値情報を参照して、前記信号値から前記第1試料中の前記特定物質に関する数値情報に校正する、請求項11に記載の分析システム。
- 前記算出部は、前記第1温度値と前記第2温度値とから算出した値が前記所定の閾値を越えた場合、前記第1温度値を変更し、変更後の前記第1温度値と前記第2温度値とから算出した値が前記所定の閾値以下の場合、変更後の前記第1温度値に基づいて、前記第1試料から検出される信号値を補正し、前記第2試料中の特定物質に関する数値情報を参照して、補正後の前記信号値から前記第1試料中の前記特定物質に関する数値情報に校正する、請求項11又は12に記載の分析システム。
- 前記算出部は、前記第1温度値と前記第2温度値とから算出した値が前記所定の閾値を越えた場合、前記第2温度値を変更し、前記第1温度値と変更後の前記第2温度値とから算出した値が前記所定の閾値以下の場合、変更後の前記第2温度値に基づいて、前記第2試料中の前記特定物質に関する数値情報を補正し、補正後の前記第2試料中の特定物質に関する数値情報を参照して、前記信号値から前記第1試料中の前記特定物質に関する数値情報に校正する、請求項11又は12に記載の分析システム。
- 前記算出部は、前記第1温度値と前記第2温度値とから算出した値が前記所定の閾値を越えた場合、前記第1温度値及び前記第2温度値を変更し、変更後の前記第1温度値と変更後の前記第2温度値とから算出した値が前記所定の閾値以下の場合、変更後の前記第1温度値に基づいて、前記第1試料から検出される信号値を補正し、変更後の前記第2温度値に基づいて、前記第2試料中の前記特定物質に関する数値情報を補正し、補正後の前記第2試料中の特定物質に関する数値情報を参照して、補正後の前記信号値から前記第1試料中の前記特定物質に関する数値情報に校正する、請求項11又は12に記載の分析システム。
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