WO2004064635A1 - 生体成分測定装置 - Google Patents
生体成分測定装置 Download PDFInfo
- Publication number
- WO2004064635A1 WO2004064635A1 PCT/JP2004/000286 JP2004000286W WO2004064635A1 WO 2004064635 A1 WO2004064635 A1 WO 2004064635A1 JP 2004000286 W JP2004000286 W JP 2004000286W WO 2004064635 A1 WO2004064635 A1 WO 2004064635A1
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- WIPO (PCT)
- Prior art keywords
- sample collection
- collection site
- measuring device
- biological component
- meal
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6843—Monitoring or controlling sensor contact pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150015—Source of blood
- A61B5/150022—Source of blood for capillary blood or interstitial fluid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
- A61B5/150259—Improved gripping, e.g. with high friction pattern or projections on the housing surface or an ergonometric shape
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150358—Strips for collecting blood, e.g. absorbent
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150381—Design of piercing elements
- A61B5/150412—Pointed piercing elements, e.g. needles, lancets for piercing the skin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150954—Means for the detection of operative contact with patient, e.g. by temperature sensitive sensor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15101—Details
- A61B5/15103—Piercing procedure
- A61B5/15107—Piercing being assisted by a triggering mechanism
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15101—Details
- A61B5/15115—Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids
- A61B5/15117—Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15101—Details
- A61B5/15115—Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids
- A61B5/15125—Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids comprising a vacuum or compressed fluids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15186—Devices loaded with a single lancet, i.e. a single lancet with or without a casing is loaded into a reusable drive device and then discarded after use; drive devices reloadable for multiple use
- A61B5/15188—Constructional features of reusable driving devices
- A61B5/1519—Constructional features of reusable driving devices comprising driving means, e.g. a spring, for propelling the piercing unit
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/157—Devices characterised by integrated means for measuring characteristics of blood
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/41—Detecting, measuring or recording for evaluating the immune or lymphatic systems
- A61B5/414—Evaluating particular organs or parts of the immune or lymphatic systems
- A61B5/417—Evaluating particular organs or parts of the immune or lymphatic systems the bone marrow
-
- 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
- A61B5/14532—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 for measuring glucose, e.g. by tissue impedance measurement
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150748—Having means for aiding positioning of the piercing device at a location where the body is to be pierced
Definitions
- the present invention relates to a measuring device and a measuring method for measuring a specific biological component in a biological sample collected by puncturing a biological body.
- the present invention relates to a biological component measuring method and apparatus for storing, processing, and / or displaying a sample collection site and a measured value in association with each other.
- glucose sensors for quantifying dalcoses are widely used for measuring blood sugar levels (glucose in blood) in clinical tests.
- glucose oxidase As a method for the quantitative determination of glucose, the enzyme glucose oxidase (EC 1.1.3.4.
- This method makes it possible to accurately quantify glucose in biological samples by using the specificity of the enzymatic reaction.
- the measurement result is greatly affected by the oxygen concentration contained in the sample, and the measurement cannot be performed if oxygen is not present in the sample.
- glucose can be accurately determined without being affected by the oxygen concentration in a biological sample. 7 things you can do
- the reagent layer containing the enzyme and the electron mediator can be integrated with the electrode system in a nearly dry state, so that a disposable Darco sensor based on this technology can be made. Has become widely available in recent years.
- the glucose can be easily measured with a measuring device simply by introducing the biological sample into the detachably connected sensor (for example, (See Japanese Patent Application Laid-Open No. H03-202702)
- the sampling site is pierced by the ⁇ attached to the piercing device.
- a living sample here, blood
- the supply port is brought into contact with the squeezed blood, and the blood is supplied into the sample tank of the sensor.
- This method has the advantages of leaving no wound on the fingertip after puncture, and having less pain at the forearm than at the fingertip, resulting in less pain at the time of measurement. Patients have more options for taking their own blood glucose measurements.
- FIG. 11 is a schematic diagram.
- a measurement with a biosensor for measuring glucose in blood and a puncture member for puncturing a living body The device 91 includes a switch 93 for starting a measurement, a display section 92 for displaying the obtained result, and a contact surface 96 with a living body.
- the living body contact portion 96 has a sampling hole 97 through which a puncture member protrudes and through which blood exuded from a living body is collected.
- the biosensor is designed so that the contact surface with the living body fits on the forearm, so it can be collected from other parts, for example, from the fingertips. It was difficult to apply.
- the blood glucose level obtained by the measurement may differ depending on the blood sampling site.
- the measuring device distinguishes between measured values from blood samples collected at different sites (for example, blood glucose values of blood samples collected at the forearm and blood samples collected at the fingertips) Was not equipped with
- the above-described conventional puncture device-integrated measuring device has a problem that the biological sample collection site is limited to the forearm due to the structure of the contact surface with the collection site.
- the present invention provides a biological component measuring apparatus which does not limit the sample collection site, and in particular, can perform both measurement with a fingertip and measurement with a non-fingertip.
- the present invention relates to a biological component measuring device provided with a mechanism for associating a sampled site with a measured value in one device, a process, a Z, and a display in one device.
- the purpose is to provide.
- the present invention provides a biological component measuring device including a mechanism for correcting a blood glucose level of a sample collected at a site different from a fingertip according to a sampling site and a sample collection time. The purpose is to do.
- the present invention also does not limit the sample collection site, in particular, it allows both fingertip measurement and non-fingertip measurement, and stores, processes, and associates a sample collection site with a measurement result.
- An object of the present invention is to provide a biological component measuring device in which a puncture device and a biosensor device, which can display Z or are displayed, are integrated.
- the present invention provides a biological component measuring device capable of storing, processing, and / or displaying a collection site and a measurement result in association with each other so that accurate monitoring and treatment of a subject can be performed.
- a biological component measuring device including a mechanism for correcting a blood glucose level of a sample collected at a site different from the fingertip according to the site and time of collection. The porpose is to do .
- the present invention has integrated a puncture mechanism for puncturing the skin of a subject to collect sample blood and a biosensor measuring device in one area.
- a biological component measuring device set In this biological component measurement device set, the puncture mechanism includes at least a puncture needle and a cap detachably fitted to the device body.
- the cap is a skin-contacting surface that comes into contact with the skin during puncturing, has an opening through which the puncture needle passes and punctures the skin, and punctures the skin. It has a skin contact surface having a shape that fits to the shape of the skin surface.
- This biological component measuring device set is characterized by having a plurality of caps which are different depending on the sampling site so that a plurality of different sampling sites can be selected. And.
- a preferred embodiment of the biological component measuring device set of the present invention includes a cap for collecting a sample from a fingertip and a cap for collecting a sample from a forearm. Yet another embodiment further includes a cap for sampling from any site selected from the group consisting of the palm, upper arm, thigh, and abdomen.
- the biosensor measuring device includes a biosensor mounting portion, and inputs measurement information from the noise sensor.
- the sample collection site input unit for inputting the information on the sample collection site, the storage unit, and the substrate concentration in the sample blood based on the information from the biological component information input unit.
- a display unit for displaying the calculated substrate concentration, wherein the calculated substrate concentration is input to the sample collection site. This information is recorded in the storage unit.
- the biosensor is a glucose sensor.
- the information on the input sample collection site is displayed on the display unit together with the calculated substrate concentration.
- the cap has at least part of a fitting portion with the device main body, and the cap has a unique shape. It has a pair of electrical contacts electrically connected to the constant resistance.
- the sample collection site input section is a resistance measuring instrument and a second pair of electric contacts electrically connected to the resistance measuring instrument, and the above-mentioned cap is fitted to the apparatus main body. When they are combined, they make contact with the pair of electric contacts to form an electric circuit.
- the second measuring device detects the above-described resistance value and connects the second pair of electric contacts. Prepare.
- This embodiment is characterized in that a sampling site is recognized based on the detected constant resistance value.
- the biosensor measuring device further includes a meal time input unit for inputting a meal time or an elapsed time after a meal.
- the storage unit previously stores a correction table or a correction formula for correcting the measured value based on the elapsed time after the meal and the sample collection site, and the arithmetic unit stores the meal time in the meal time input unit.
- the correction table or the correction formula stored in the storage unit It is characterized by calculating the corrected substrate concentration.
- the present invention also provides, in another aspect, a biological component measuring device in which a puncturing mechanism for puncturing skin of a subject to collect sample blood and a biosensor measuring device are integrated.
- the puncture mechanism includes at least a puncture needle and a cap that is detachably fitted to the device main body.
- the cap has a skin contact surface that comes into contact with the skin during puncturing and has an opening through which the puncture needle penetrates the skin.
- the biosensor measuring device includes a biosensor mounting portion, a biocomponent information input portion for inputting measurement information from the biosensor, and a biocomponent information input portion for inputting information on a sample collection site.
- a sample collection site input unit, a calculation unit for calculating a substrate concentration in sample blood based on information from the biological component information input unit, and a calculated substrate concentration are included. It has a storage unit for recording the information of the input sample collection site, and a display unit for displaying the calculated substrate concentration.
- the biological component measuring device of the present invention according to this embodiment is characterized in that the skin contact surface of the above-mentioned cap is fitted to the device main body. At least two sensors are provided for sensing contact with the skin, which can be electrically connected to the sample collection site input, and the sample collection site input detects the contact.
- the sampling site is recognized based on the number and / or combination of the sensors.
- the sample collection site input unit detects / contacts only a part of the sensor with the skin. It is characterized in that the pull sampling position is recognized as a fingertip.
- the sample collection site input section includes a sample detection section when all of the sensors detect contact with the skin.
- the sampling site is any one selected from the group consisting of a palm, a forearm, an upper arm, a thigh, and an abdomen.
- the biosensor measurement device further includes a meal time input unit for inputting a meal time or an elapsed time after a meal
- the storage unit includes:
- a correction table or correction formula for correcting the measured value based on the elapsed time after a meal and the sample collection site is stored in advance, and the arithmetic unit inputs the meal time to the meal time input unit. Eating time or elapsed time after meal Based on the sample collection site input to the sample collection site input unit, the correction is performed by referring to the correction table or the correction formula stored in 01v. Special feature is to calculate the substrate concentration
- the present invention provides, in still another aspect, a biosensor measuring device.
- This biosensor measuring device includes a biosensor mounting section, a biological component information input section for inputting measurement information from the biosensor, and a sample collection for inputting information on a sample collection site.
- a site input unit, a calculation unit for calculating the substrate concentration in the sample blood based on the information from the biological component information input unit, and the calculated substrate concentration are also input.
- a storage unit for recording information on the sample collection site and a display unit for displaying the substrate concentration are provided.
- the biosensor measuring device further includes a meal time input unit for inputting a meal time or an elapsed time after a meal, and stores the meal time.
- the section stores in advance a correction table or a correction formula for correcting the measured value based on the elapsed time after the meal and the sample collection site, and the arithmetic section is inputted to the meal time input section.
- Based on the meal time or the elapsed time after a meal and the sample collection site input to the sample collection site input unit refer to the correction table or the correction formula stored in the storage unit based on the sample collection site input to the sample collection site input unit. Calculating a corrected substrate concentration, a storage unit further storing the corrected substrate concentration, and a display unit displaying the corrected substrate concentration. .
- a more accurate interpretation of a measured value can be achieved by associating a biological sample collection site with a measurement result. Further, according to the present invention, a method of correcting a measurement result can be selected by recognizing a sampling site, and accurate measurement can be performed.
- FIG. 1 is a schematic view showing an external appearance of a puncture device-integrated biological component measuring device provided with a cap 18 adapted for collecting blood from a fingertip according to an embodiment of the present invention.
- FIG. 1A shows a state in which the cap 18 is fitted to the housing 11, and
- FIG. 1B shows a state in which the cap 18 is removed.
- FIG. 2 is a schematic diagram showing an external appearance of a biological component measuring device 2 integrated with a puncture device provided with a cap 28 adapted to collect a biological sample from a forearm according to an embodiment of the present invention. is there.
- FIG. 3 shows a piercing device integrated type equipped with a cap recognition mechanism (including terminals 61, 62, 63, 64, and a constant resistance 65) according to an embodiment of the present invention.
- FIG. 2 is a schematic diagram showing an appearance of a biological component measuring device 3.
- FIG. 4 is a biological component measuring device according to an embodiment of the present invention.
- FIG. 3 is a block diagram showing the entire configuration of FIG. 3 (however, a cap 38 and a puncturing member are omitted).
- FIG. 5 is a flowchart showing the processing operation of CPU 101 in the measuring apparatus shown in FIG. 4 as the overall configuration.
- FIG. 6 is a schematic diagram showing an external appearance of a biological component measuring device 4 according to an embodiment of the present invention, which includes a cap having a biological contact portion in which a plurality of sensors for sensing the contact state of the skin are arranged. It is.
- FIG. 7 is a graph showing the time dependence of a correction coefficient for correcting a measured value based on the elapsed time after a meal.
- 1 is a schematic diagram showing the appearance of a biological component measuring device 5 according to one embodiment of the present invention.
- FIG. 9 is a block diagram showing the entire configuration of the biological component measuring device according to the embodiment of the present invention shown in FIG.
- FIG. 10 is a flowchart showing the processing operation of CPU 101 in the measuring apparatus shown in FIG. 9 as the overall configuration.
- FIG. 11 is a schematic diagram of a conventional biosensor for measuring glucose.
- a measuring device and a measuring method used for quantifying a blood glucose level will be described as an example.
- Embodiment 1 of the present invention will be described with reference to FIG. 1 and FIG.
- FIG. 1 is a schematic diagram showing the external appearance of a biological component measuring device 1 integrated with a puncture device of the present invention equipped with a cap 18 adapted to collect a biological sample (here, blood) from a fingertip.
- a biological sample here, blood
- FIG. 1A shows a state in which the cap 18 is fitted in a housing 11 that accommodates the main body of the apparatus and forms a part thereof
- FIG. 1B shows a state in which the cap 18 is removed. Show the state
- the biological component measuring device 1 includes a housing 11 and a cap 18 made of a material such as plastic. Housing 1 1 displays the measured value of biosensor 69.
- a display section 12 composed of a liquid crystal digital display for performing measurement and a switch 13 for starting measurement are provided.
- the housing 11 is provided with a gasket 14 or other sealing mechanism for sealing a fitting portion with the cap 18.
- the cap 18 can be detachably attached to the housing 11 by friction fitting, detent, or the like.
- the housing 11 covered by the cap 18 includes a puncture member including a puncture needle holder 68 and a puncture needle 70. Opening for the piercing member 67 for attaching the puncture member and for moving through the piercing member when the piercing member pierces the skin for collecting a living body sample, and the collected living body A biosensor mounting opening 66 for mounting a biosensor 69 for measuring a biological component in the sample is provided.
- the housing 11 is provided with an assembly (not shown) for allowing the puncture member to protrude through the puncture member opening portion 67 inside the housing 11.
- an assembly includes, for example, an air pressure and a spring as disclosed in Japanese Patent Application Laid-Open No. 2001-3466781. Known assemblies to be used may be used.
- a slot (not shown) is provided inside the housing 11 for attaching and detaching the noise sensor 69 through the opening 66. (Or mounting part) (not shown).
- the biosensor 69 is usually a disposable type.
- the noise sensor 69 includes one or more electrical contacts (not shown) on the end that enters this slot, and one or more electrical contacts located within the slot. Is engaged with the electrical contact (not shown).
- a CPU (not shown) for performing data processing and the like connected with such an electric contact and an electric circuit, and RAM, R0M or an external device are provided. It is equipped with a storage unit (not shown) consisting of a storage device.
- the cap 18 is provided with an opening 17 for collecting a biological sample, and through this hole, the opening for the piercing member of the housing 11 is provided.
- the puncture member including the puncture needle attached to 67 protrudes and punctures the subject's skin.
- the surface where the cap 18 comes into contact with the living body, that is, the living body contact part 19 has a curved surface that fits into the shape of each sampling site.
- the living body contact portion 19 of the cap 18 in FIG. 1 is designed to have a curved surface such that the belly of the fingertip fits well when the finger is attached.
- the measuring device 1 is arranged so that the living body contact portion 19 is in close contact with the skin surface of the sample collection site of the subject who collects the biological sample.
- an elastic body such as rubber or elastomer is formed around the opening 17 so that the opening 17 for collecting the living body sample is sealed by contact with the skin.
- a seal (not shown) is provided.
- the switch 13 is usually formed by a push button or the like, and by pressing the button, The measurement operation starts. Specifically, when the switch 13 is pressed, the stopper for stopping the piercing member provided in the housing 11 comes off, and the mechanical energy such as the spring is released. The piercing member mounted in the housing 11 protrudes by a mechanism based on the puncture mechanism, and punctures the fingertip.
- the above-described vacuum pump and electronic devices (not shown) in the housing 11 are operated to draw a vacuum, and the vacuum pump is opened. The skin surrounded by the mouth 17 is pulled up toward the opening 17 and the skin becomes reddened, and the puncture needle provided to the puncture member with respect to the skin. The puncture is performed.
- the aforementioned puncture member assembly (not shown) is normally operated after an appropriate time set in advance by the electronic device incorporating the program. It is done.
- the above-mentioned slot on which the biosensor 69 is mounted is moved in the direction of the punctured skin, and the nanosensor 69 provided on the measuring device 1 is moved to the blood exuding from the fingertip.
- the mechanism for moving the slot for example, a known slide mechanism as described in Japanese Patent Application Laid-Open No. 2001-3466781 can be used.
- the start of the slot operation can be linked with the end of the puncture assembly operation. Note that the position of the slot and the biosensor 69 in the measuring device 1 is determined in advance so that the exuded blood comes into contact with the tip of the biosensor 69 mounted on the slot.
- the biosensor 69 has at least one pair of electrodes and a specific reaction to glucose in blood carried by these electrodes in the sample container that comes into contact with the biological sample.
- a reagent system containing glucose dehydrogenase and an electron carrier (not shown).
- the reagent system is Reacts with glucose.
- a current value including a change in the current value due to the above reaction is input to the biological component information of the measuring device 1.
- the blood glucose level is obtained by electrochemically measuring the amount of the electron carrier by measuring with a unit (not shown) and a CPU (not shown).
- the obtained measurement result is stored in a storage unit (not shown) as data of a biological sample (blood) collected from a fingertip, and is displayed on the display unit 12.
- FIG. 2 is a schematic diagram showing the appearance of a puncture device-integrated biological component measuring device 2 of the present invention including a cap 28 adapted to take a biological sample from the forearm.
- FIG. 2 shows a state in which a cap 28 is fitted to the housing 11.
- the biological contact portion 29 of the cap 28 has a shape suitable for collecting a biological sample from the forearm.
- the bio-contact portion 29 is shaped so that it fits well when pressed against the skin of the subject's forearm (usually more than a finger). (A large diameter curved surface).
- the cap 28 has an opening 27 for collecting a living body sample corresponding to the opening 17 shown in FIG.
- the cap 28 can be attached to and detached from the housing 11 in the same manner as in the case of FIG. The appearance and the description with the cap 28 removed are the same as in the case of FIG. 1, and will not be described here.
- the caps (18, 28) shown in FIGS. 1 and 2 are designed to conform to the shape of each biological sample collection site. It can be freely attached to and detached from the housing 11. Therefore, the user only has to change the collection site of the biological sample to a cap (18, 28) suitable for the collection site. In this way, a single measurement device can collect biological samples from a plurality of different sites.
- the case of sampling with a fingertip and a forearm has been described as an example, but the present invention is not limited to these, and the cap (18, 28) ) Can be designed to fit other biological sampling sites (eg, palm, upper arm, thigh, abdomen, etc.).
- the caps (18, 28) protect the puncture needle except when puncturing.
- Measuring blood glucose from other than the fingertips is often performed in recent years because of the merit of S, such as less pain or no scars on the fingertips.
- S such as less pain or no scars on the fingertips.
- the measurement it is recommended that the measurement be done from the fingertips, even if the person is usually measuring from the forearm.
- a possible measuring device of the present invention is convenient for the user.
- the shape of the biological component measuring device of the present embodiment shown in FIG. 1 or FIG. 2 is simply simplified for explanation, and is limited to such a box-shaped device. This is not intended to be the case, but may be any other shape that can be easily grasped with the hand or finger (for example, cylindrical, flat, pen-shaped, etc.). The same applies to the embodiment to be described).
- Figure 3 is a schematic diagram showing the external appearance of a biological component measuring device 3 integrated with a puncture device equipped with a cap recognition mechanism (including terminals 61, 62, 63, 64, and constant resistance 65). It is a figure.
- the biological component measuring device 3 of the present invention accommodates the main body of the device, and a housing 31 made of a material such as plastic, which is a part of the housing, and is detachably attached to the housing 31. Caps 38 and.
- FIG. 3 shows a state in which the cap 38 for the fingertip is removed from the housing 31.
- the biological component measuring device 3 shown in FIG. 3 has a cap recognition mechanism at a fitting portion between the housing 31 and the cap 38. I have it.
- a storage unit (see 102 in FIG. 4) for storing the data and a timer (not shown) for measuring the measurement time are stored in the housing 31. Is built-in. The other points are basically the same as those shown in FIG. 1, and therefore, detailed description is omitted below.
- the display 31 includes a liquid crystal digital display for displaying a result such as a concentration of a biological component measured by a biosensor.
- a section 32 and a switch 33 for starting the measurement are provided.
- the nozzle 31 has a noise sensor 69, an opening for mounting the noise sensor 66, a puncture holder 68 and a puncture member 70, and a puncture member.
- An opening 67 is provided.
- the housing 31 also has a gasket 34 for sealing the fitting portion with the cap 38 (other sealing mechanism may be used).
- the cap 38 can be detachably attached to the housing 31 by friction fitting, detent, or the like.
- the cap 38 has a biological contact part 39 designed to have a curved surface so that it can be easily fitted to a fingertip, and an opening part 37 for collecting a biological sample. And. Since the cap 38 is detachable, the living body contact part 39 is designed for a part other than the fingertip (for example, forearm or thigh) according to the sampling part. Anything (such as, for example, the biological contacting part 29 shown in FIG. 2) can be used.
- the cap 38 when the cap 38 is attached to the nose 31, the protrusion of the cap 38 is attached to the nose 31.
- a recess 35a for fitting with 35b is provided.
- the recesses 35 a of the housing 31 are provided with terminals (61, 62) made of a conductor such as copper, and the cap 38 is provided with the housing 3.
- the same conductive terminals (63, 64) provided on the contact surfaces of the projections 35b with the recesses 35a of the boss are formed. Have come into contact
- the terminal 63 and the terminal 64 are electrically connected to each other, and a constant resistance inherent to the cap 38. 65 are provided.
- the terminals 61 and 62 on the recess 35a of the housing 31 are connected to a resistance measuring device (not shown) provided inside the housing 31.
- the resistance measuring device is configured such that the terminals 61 and 62 on the concave portion 35 a and the terminals 63 on the convex portion 35 b
- the resistance value of the constant voltage 65 is detected, and the resistance value is measured by the CPU of the measuring device 3 provided in the housing 31. (See 101 in Figure 4).
- the CPU assigns the resistance value of the constant resistance previously stored in the storage unit (see 102 in FIG. 4) in the housing 31 to a specific sampling part, and assigns a value (not shown).
- the 'I wm of the sample collection site is stored in the housing 31 and is stored with the measured value as ls> P (see 02 in FIG. 4). It is displayed on the display section 32 together with the value as required.
- the time measured by the evening image (not shown) built into the enclosure 31 may be used.
- the data at the fixed time is stored in the storage unit together with the measurement.
- the sample can correct the measured value based on information on the sampling section and the sampling time, so that the blood glucose level of the subject can be more accurately measured. Know and consequently more certainty than the subject's glycemic control
- FIG. 2 is a block diagram showing the entire configuration of the biological component determining device 3 according to the present invention (however, a clip 38 and a piercing member are omitted).
- the biological component determination device 3 includes a CPU 0 unit 102, a biological component information input unit 103 for inputting a biological component from the biosen 69, and a sampling unit for inputting a biological component collection unit ilL.
- An input section 104 and a display section 32 are provided.
- the biological component measuring device 3 has a timer (shown) for inputting a time.
- the biological component information input section 103 includes a slot (not shown) for mounting the biosensor 69, and a slot for engaging with a terminal of the biosensor 69. Provided contacts (current
- the biological component information input section 103 has a drive power supply for applying a voltage to the measurement electrode of the biosensor under the control of the CPU 101, and a measurement electrode and sample of the biosensor.
- a voltage conversion circuit (not shown) for converting the current generated by the contact with the voltage into a voltage
- an AZD conversion circuit (not shown) for converting the voltage value from the current Z-voltage conversion circuit into a pulse. May be included)
- the sampling site input section 104 is composed of a recess 35a provided in the elephant and the housing 31 and terminals 61 and 62 provided thereon (see FIG. 3). ) And a resistance measuring device (not shown) electrically connected to them and electrically connected to the CPU, and a cap 38 (see FIG. 3). ) Detect the specific resistance value and input it to CPU101.
- the upper block 02 is composed of a storage medium such as a RAM, a ROM, or an external storage device, and has a biological component information input section 103, a sampling part input section 104, and a CPU 101.
- a storage medium such as a RAM, a ROM, or an external storage device
- the display section 32 is composed of a display device such as a liquid crystal digital display, and displays information such as measurement results, measurement time, and measurement site. Display information.
- FIG. 5 is a flowchart showing the processing operation of CPU 101 in the measuring apparatus shown in FIG. 4 as the overall configuration.
- the processing operation shown in FIG. 5 is started by a user's operation such as pressing or touching the switch 33.
- the CPU 101 activates the puncturing mechanism of the measuring device 3 to puncture the skin at the measurement site of the subject and exude blood.
- the CPU 101 sends an electric signal containing information on the concentration of the biological component (substrate) from the biosensor 69 to the biological component information input section 103.
- the biosensor 69 comes into contact with the blood sample exuded by the puncture, and the blood sample is stored in the sample storage section of the nanosensor 69.
- step S12 the CPU 101 calculates the concentration of the substrate based on the signal. In the calculation of the substrate concentration, for example, by applying an algorithm stored in the storage unit 102 in advance, it is possible to relate the concentration of the substrate in the sample. .
- step S13 the CPU 101 based on the sampling site information (for example, the resistance value of the constant resistance 65) input via the sampling site input unit 104. Then, a specific collection site is acquired, and in step S14, the calculated concentration and the specified collection site are stored in the storage unit 102.
- step S15 it is determined whether or not to display the information. If the information is to be displayed (S15: Yes), the display 3
- step 2 after the result is displayed in step S16, the processing is terminated. If not displayed (S15: No), the processing is terminated.
- the determination as to whether or not to display can be configured to depend on, for example, a user operation.
- a display button (not shown) or the like may be provided in the measuring device 3, and the user may select display / non-display by pressing the button. Note that all the measurement results may be displayed without providing such a display Z non-display determination step (step S15).
- step S 14 the calculated concentration and the collection site may be stored in the storage unit 102, and the collection time may be stored together. This allows time-series analysis of the measured values.
- the puncturing member and the biosensor are separately housed in the measuring device.
- a device in which the puncturing member and the biosensor are integrated may be used. .
- the cap recognition mechanism (61, 62) of the cap 38 and the housing 31 which have a shape that closely matches the surface of the blood collection site , 63, 64, and 65)
- the blood collection site was recognized using the method described above, but the method for recognizing the blood collection site is not limited to this.
- a plurality of sensors (81, 82, 83, and 84) for sensing the contact state of the skin are arranged around the living sample collection opening 47 provided in 49.
- the blood collection site may be recognized based on a combination of signals detected by these sensors.
- the cap 48 includes a living body contact portion 49 having a substantially flat top.
- the living body contact portion 49 can handle both a relatively small portion of the contact surface, such as a fingertip, and a relatively large portion of the contact surface, such as a forearm.
- the cap 48 is configured to have a relatively small flat surface at the top.
- the living body contact part 49 is provided with sensors 81, 82, 83, and 84 for sensing contact with the skin.For example, a blood sample is collected from a fingertip. In some cases, only a part of the four sensors (e.g., sensor 8 ⁇ and sensor 83) may have skin contact due to the small contact area of the skin with biological contact part 49. Sense contact with.
- the contact area of the skin with the biological contact part 49 is relatively large, so that all of the sensors (sensors 81, 82, 83, and 83) 4) senses contact with the skin.
- the sensors (81, 82, 83 and 84) are connected to a CPU (not shown) in the housing 41 of the measuring device.
- the CPU receives a signal for detecting contact with the skin from all four sensors, the CPU determines that the sampling site is the forearm, and the CPU determines that the sampling site is the forearm. Judging that the sampling site is a fingertip when receiving a signal from only a part (for example, two sensors (for example, sensors 81 and 83)) to contact the skin
- Sensors that sense such contact with the skin include, for example, a sunset sensor, a tactile sensor, a method of measuring the resistance change using electrodes, and a light source installed to reflect the reflected light.
- Examples include measurement methods, but are not limited to these.
- the connections between the sensors (81, 82, 83, and 84) and the CPU inside the housing 41 are the same as those shown in FIG.
- An electrical contact or the like can be provided at the fitting portion of the housing 41 to perform the operation.
- the sensor may be provided on the side of the housing 41 instead of the cap 48. In that case, the cap 48 may be provided with openings (not shown) for these sensors.
- the number of sensors to be equipped is usually two or more, and is not limited to four as in the above example.
- a plurality of input switches can be used as a sampling site input unit.
- a switch for forearm selection and a switch for fingertip selection connected to the CPU inside the knowing are provided in the housing of the device body (not shown).
- the measurement operation By pressing any one of the switches, the measurement operation can be started and the sample collection site can be input.
- a switch can be like a push button.
- the switch for starting the measurement may be provided separately from the switch for inputting the sampling site, or the switch for starting the measurement may be provided. You can also use it as a switch.
- the blood glucose level varies greatly depending on the blood sampling site.
- the measurement on the forearm often behaves more slowly than the measurement on the fingertip in blood glucose fluctuations (John M. ELLISON, Diabetes Care vol. 25, No. 6, 961-964, (2002)). Therefore, a correction formula is created in advance based on the results measured under these conditions, so that the blood glucose level at the forearm can be corrected according to the elapsed time after eating. Conceivable.
- FIG. 7 shows the time dependence of the correction coefficient obtained based on the data of the above-described John M. ELILISON (2002).
- the vertical axis (y-axis) shows the correction coefficient for correcting the blood sample collected from the forearm
- the horizontal axis (X-axis) shows the elapsed time after eating.
- the correction coefficient is represented by a linear function of the time after meal, but this is not intended to be limited to this, and other functions (eg, a quadratic function, an exponential function, etc.) Can be represented.
- a correction table based on the experimental data is created in advance, and the blood sample collection site and the time after a meal are determined. The fit may be used to determine the correction factor.
- Experimental data is preferably acquired for each subject.
- FIG. 8 is a schematic diagram showing a configuration of a biological component measuring device 5 according to Embodiment 3 of the present invention, which can input an elapsed time after a meal.
- the measuring device 5 includes a housing 51 and a cap 38.
- the difference between the measuring device shown in FIG. 8 and the measuring device shown in FIG. 3 is that the measuring device 5 shown in FIG. 8 includes a meal time input section 36 which is a means for inputting a time after a meal. It is a point.
- the other parts are the same as in FIG. 3, and the description is omitted.
- the meal time input section 36 is composed of, for example, a push button that allows the user to input a number from 0 to 9 in order to input the time at which the user has eaten or the elapsed time after the meal. . If the meal time or the elapsed time after the meal can be entered, other input means such as the evening switch panel may be used, in addition to the push button.
- FIG. 9 shows the overall configuration of the biological component measuring device according to the third embodiment of the present invention, whose external appearance is schematically shown in FIG. It is a block diagram (however, the cap 38 and the puncturing member are omitted). This diagram differs from the block diagram shown in FIG. 4 in that the meal time input section 36 is further included, and the elapsed time after meal and the sun This is a point where a correction formula or a correction table for correcting the measurement value based on the printing part is stored.
- the information is transmitted to the CPU 101, and further recorded in the storage section 202 as necessary.
- This meal time information is used to correct the substrate concentration in the sample measured by the biosensor according to the elapsed time after the meal. Instead of inputting the meal time, the time elapsed after the meal may be directly input.
- the storage unit 202 is configured from a storage medium such as a ROM, a RAM, or an external storage device, and includes a biological component information input unit 103, a collection site input unit 104, a meal time input unit 36, and a meal time input unit 36. And information from the CPU 101 and so on. Furthermore, the storage unit 202 includes a correction formula or a correction table stored in advance to correct the measured value according to the elapsed time after a meal and the sampling site.
- FIG. 10 is a flowchart showing the processing operation of CPU 101 in the measuring apparatus shown in FIG. 9 as the overall configuration.
- the processing operation shown in FIG. 10 is started by a user operation such as pressing or touching the switch 33.
- the CPU 101 activates the puncturing mechanism of the measuring device 5 to determine the position of the measurement site of the subject. Punctures the skin and exudes blood.
- the CPU 101 sends an electric signal containing information on the concentration of a biological component (here, glucose) from the biosensor 69 to the biological component information input unit.
- a biological component here, glucose
- step S22 the CPU 101 calculates the concentration of the substrate based on the signal. In the calculation of the substrate concentration, for example, by applying an algorithm stored in the storage unit 202 in advance, it is possible to relate the concentration of the substrate in the sample.
- step S23 the CPU 101 obtains the collection site information (for example, the resistance value of the constant resistance 65) input via the collection site input unit 104. To identify the specific collection site.
- step S24 it is determined whether or not the sampling site is a fingertip, and if it is a fingertip (S24: Yes), it is identified as the calculated concentration in step S27.
- step S28 it is determined whether or not to display the information. If the information is to be displayed (S28: Yes), the display section 32 is displayed in step S29. After displaying the result on the screen, the processing ends. If not displayed (S28: No), the processing ends.
- the determination of whether or not to display can be configured to depend on, for example, a user operation.
- a display button (such as the one shown in the drawing) may be provided in the measuring device 5 so that the user can select the display Z non-display by pressing the button.
- No display / non-display step (step 28) is provided, and all measurement results are displayed.
- step S24 if the sampling site is other than the fingertip (for example, the forearm) (S24: No), when the finger is overfitted without step S Thou shalt be there S 2
- step 26 the storage unit 0 2 calculates a correction coefficient or a correction rate by referring to a correction formula (for example, as shown in FIG. 7) or a correction table, and uses the correction coefficient or correction rate to correct based on time after meal. Obtain the measured value. In addition, since the correction coefficient or the correction often differs depending on the subject, it is preferable to obtain the correction coefficient individually for each subject. Then, the corrected measured value step S27 is stored in the record p202 together with the sampling site information, and then, in step S28, those values are stored. It is determined whether or not to display the information, and the result is displayed on the display section 32 in the mouth (S28: Yes) to be displayed, in step 29, and the processing is ended 9 '. If not displayed,
- the fingertip is used after eating, such as when sampling at a site other than the fingertip such as the forearm and measuring the blood glucose level of the blood.
- the sample sampled at a site other than the above there is no difference in the measured value of the substrate concentration in the sample.
- Substrate concentration _t Use a correction factor like By performing the correction, the sample sampled with the fingertip can be compared with other measurement results.
- the measurement value at a site other than the fingertip was corrected with respect to the measurement value at the fingertip.However, the measurement value at which site was used as a reference was determined as appropriate according to the purpose. You can choose one.
- a plastic or the like is preferable. If the part that comes into contact with the living body is partially formed of elastic material such as rubber, the adhesion to the skin will be increased, and measurement can be performed more reliably.
- the biosensors in Embodiments 1 to 3 are Any sensor that can identify or quantify specific components in a body sample may be used.
- the measurement method can be electrochemical or optical.
- dalco-soxida or glucose stehydronase which specifically reacts with glucose as an enzyme
- gallium is used by using lithium ferrocyanide as a transmitter and obtaining a chemical signal response using an electrode. Not limited to these enzymes and electron carriers
- an enzyme corresponding to a substrate to be measured contained in a biological sample is used.
- the enzyme include, but are not limited to, fructosaldehyde and lipase, Alcohol oxidase, lactate oxidase, cholesterol oxidase, cholesterol aldehyde ⁇ genase, xanthin oxidase, amino acid oxidase and the like.
- the electron carrier examples include p-benzoquinone, phenazine meth sulphate methylene blue, and a pherocene derivative. Also, one or more of these electron mediators that can provide a current response even when oxygen is used as the electron mediator are used.
- the sampling site of the living body sample is shown for the fingertip and the forearm, but is not limited to this.
- the hand, upper arm, thigh, abdomen, etc. may be the sampling site.
- the palm may be the base of the thumb or the little finger.
- the shape of the cap should be determined according to the shape of each sampling site.
- the present invention is not limited to this, as long as the sample contains a test substance whose measured value varies depending on the collection site and collection time.
- the substrate is not limited to glucose.
- it can be applied to other substrates contained in other biological samples such as interstitial fluid, saliva, sweat, urine, and bone marrow fluid.
- a more accurate interpretation of a measured value can be made by associating a biological sample collection site with a measurement result, so that an accurate monitoring of a subject's state can be achieved. It is useful as a biosensor measuring device for rings.
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04702809A EP1584291A4 (en) | 2003-01-17 | 2004-01-16 | APPARATUS FOR MEASURING BIOLOGICAL CONSTITUENT |
US10/512,939 US7238160B2 (en) | 2003-01-17 | 2004-01-16 | Apparatus for measuring biological component |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003009461 | 2003-01-17 | ||
JP2003-9461 | 2003-01-17 |
Publications (1)
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WO2004064635A1 true WO2004064635A1 (ja) | 2004-08-05 |
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PCT/JP2004/000286 WO2004064635A1 (ja) | 2003-01-17 | 2004-01-16 | 生体成分測定装置 |
Country Status (4)
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US (1) | US7238160B2 (ja) |
EP (1) | EP1584291A4 (ja) |
CN (2) | CN100398062C (ja) |
WO (1) | WO2004064635A1 (ja) |
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JP2008522784A (ja) * | 2004-12-13 | 2008-07-03 | バイエル・ヘルスケア・エルエルシー | 代替部位検査で取得された読取値のためのマーカ |
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- 2004-01-16 EP EP04702809A patent/EP1584291A4/en not_active Withdrawn
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Also Published As
Publication number | Publication date |
---|---|
CN100398062C (zh) | 2008-07-02 |
US20050159678A1 (en) | 2005-07-21 |
EP1584291A1 (en) | 2005-10-12 |
CN100579450C (zh) | 2010-01-13 |
CN1697627A (zh) | 2005-11-16 |
EP1584291A4 (en) | 2009-04-29 |
US7238160B2 (en) | 2007-07-03 |
CN101273895A (zh) | 2008-10-01 |
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