WO2006035675A1 - 成分測定用チップ - Google Patents
成分測定用チップ Download PDFInfo
- Publication number
- WO2006035675A1 WO2006035675A1 PCT/JP2005/017506 JP2005017506W WO2006035675A1 WO 2006035675 A1 WO2006035675 A1 WO 2006035675A1 JP 2005017506 W JP2005017506 W JP 2005017506W WO 2006035675 A1 WO2006035675 A1 WO 2006035675A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- chip
- test paper
- hole
- component measuring
- Prior art date
Links
- 238000012360 testing method Methods 0.000 claims abstract description 73
- 230000002093 peripheral effect Effects 0.000 claims abstract description 37
- 238000005259 measurement Methods 0.000 claims description 32
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 239000000306 component Substances 0.000 description 82
- 210000004369 blood Anatomy 0.000 description 69
- 239000008280 blood Substances 0.000 description 69
- 239000000463 material Substances 0.000 description 15
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 12
- 239000008103 glucose Substances 0.000 description 12
- 239000003153 chemical reaction reagent Substances 0.000 description 11
- 239000000470 constituent Substances 0.000 description 9
- 239000011148 porous material Substances 0.000 description 5
- 239000012503 blood component Substances 0.000 description 4
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- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 108010015776 Glucose oxidase Proteins 0.000 description 2
- 239000004366 Glucose oxidase Substances 0.000 description 2
- 102000003992 Peroxidases Human genes 0.000 description 2
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- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 210000000601 blood cell Anatomy 0.000 description 2
- 210000001124 body fluid Anatomy 0.000 description 2
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- 229940116332 glucose oxidase Drugs 0.000 description 2
- 235000019420 glucose oxidase Nutrition 0.000 description 2
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- LJCNDNBULVLKSG-UHFFFAOYSA-N 2-aminoacetic acid;butane Chemical compound CCCC.CCCC.NCC(O)=O LJCNDNBULVLKSG-UHFFFAOYSA-N 0.000 description 1
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- 229920000178 Acrylic resin Polymers 0.000 description 1
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
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- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54366—Apparatus specially adapted for solid-phase testing
- G01N33/54386—Analytical elements
- G01N33/54387—Immunochromatographic test strips
- G01N33/54388—Immunochromatographic test strips based on lateral flow
-
- 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
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0295—Strip shaped analyte sensors for apparatus classified in A61B5/145 or A61B5/157
Definitions
- the present invention relates to a component measuring chip for measuring the amount of a target component in a sample, such as blood glucose level measurement.
- a blood glucose measurement device (blood component measurement device) that measures blood glucose levels is known.
- This blood glucose measurement device supplies and develops blood 200 (specimen) on a test paper that is colored according to the amount of glucose in the blood, and optically measures (colorimetrically) measures the color of the test paper. The value is quantified.
- a component measuring chip is attached, and blood 200 is also collected from the component measuring chip force.
- the collected blood 200 is absorbed by the test paper installed on the component measuring chip.
- the color measurement of the test paper is performed by irradiating the test paper with light and measuring the intensity of the reflected light in a photometry unit including a light emitting element and a light receiving element.
- a component measuring chip blood test tool
- a bottomed cylindrical (cup-shaped) chip body holder
- a test paper blood absorbing member
- a thin tube projecting from the bottom of the chip body
- the outer diameter of the thin tube is small (small), that is, the area where blood 200 can adhere (contact) in the thin tube is small.
- Vs 200 There is a problem in that it is difficult to reliably collect blood 200 when the attachment position is shifted.
- An object of the present invention is to provide a component measuring chip capable of reliably collecting a sample even if it is a very small amount.
- the component measuring chip of the present invention comprises:
- a housing having a tip for contacting the skin, and a through hole opening in the tip;
- test paper that can absorb the specimen on one side
- a nested body that comes into contact with the test paper
- a nested structure that is formed in the nested body and that is inserted into the through hole.
- the tip portion has a center pole portion projecting and formed in a mountain shape, and the through hole is formed around or around the center pole portion. Is preferred.
- the housing has a plurality of the through holes arranged radially from the center of the housing.
- a plurality of the protrusions are arranged radially from the center of the insert.
- the center of each projection is eccentric with respect to the center of each through hole in a state where the housing and the insert are combined. It is preferable.
- the component measuring chip of the present invention preferably includes means for collecting the sample that has passed through the flow path at the center of the test paper.
- a housing-side taper portion having an outer diameter gradually decreasing in a direction opposite to the protruding direction of the tip portion is provided on the back surface of the housing.
- a nesting side taper portion On the surface of the nesting body, there is provided a nesting side taper portion whose inner diameter gradually increases in the protruding direction of the protruding portion,
- housing-side taper portion and the nesting-side taper portion face each other in a state where the housing and the insert are combined.
- the component measuring chip of the present invention includes
- the flow path is formed by a gap formed by combining two different members. [0024] Thereby, even a very small amount of sample can be collected more reliably.
- the tip of the protrusion protrudes through the through-hole force of the housing in a state where the housing and the insert are combined.
- a tip of the protruding protrusion is positioned at a position lower than a tip of the tip.
- the overall shape of the tip of the component measurement tip can be a mountain with a gentle slope, and therefore the outer diameter (average) of the tip of the component measurement tip is the base end side. It is smaller (thinner) than the outer diameter.
- each protrusion of the nesting is formed corresponding to each of the plurality of through holes of the housing.
- the center of each projection is eccentric to the central axis side of the tip.
- the width of the flow path on the central axis side of the component measuring chip is set smaller than the width on the outer peripheral side of the component measuring chip.
- the component measuring chip of the present invention comprises positioning means for positioning so that the center of the housing and the insert is aligned in a state where the housing and the insert are combined. Favored ,. [0034] Thereby, the housing and the insert are accurately positioned.
- the positioning means includes a guide pin provided at the center of the back surface of the housing, and a guide provided at the center of the nesting body and into which the guide pin is inserted. It is composed of a hall and is preferred!
- a lip portion provided concentrically with the tip portion and projecting in a ring shape is formed on the outer peripheral side of the through hole.
- the sample when the skin contacts the housing, the sample can be easily and surely introduced into the through hole without missing the sample.
- the through hole is provided substantially in parallel with the protruding direction of the tip portion!
- the taper angle of the nesting side taper portion is smaller than the taper angle of the housing side taper portion.
- the width of the gap formed between the nesting-side taper portion and the housing-side taper portion in a state where the nesting protrusion is inserted into the through-hole of the nosing is the component measuring chip.
- the gap gradually decreases toward the central axis of the loop, that is, the gap forms a convergent shape. Therefore, a capillary phenomenon appears remarkably near the center of the gap. Therefore, the specimen that has passed through the flow path can be reliably collected at the center of the test paper.
- the housing-side tapered portion and the Z or the nesting-side tapered portion are provided with a plurality of concave portions or convex portions.
- the gap between the housing-side taper portion and the nesting-side taper portion becomes small (narrow) in a state where the nesting protrusion is inserted into the through hole of the nosing. Therefore, the specimen flowing down the flow path enters the gap between the housing-side taper portion and the nesting-side taper portion, and can easily reach the center portion of the test paper through the gap by capillary action.
- a part of the test paper is the nested book. It is preferred to be supported on one side of the body.
- the housing and the insert are fixed to each other by bonding or fusion in a state where the housing and the insert are combined.
- the outer peripheral portion of the protrusion and the inner peripheral portion of Z or the through hole are subjected to a hydrophilic treatment!
- the housing and the nesting are made of the same or different materials.
- FIG. 1 is a perspective view of a component measuring chip according to the present invention.
- FIG. 2 is a front view of the component measuring chip shown in FIG. 1.
- FIG. 3 is a front view of a housing provided in the component measuring chip shown in FIG. 1.
- FIG. 4 is a side view of the housing shown in FIG. 3.
- FIG. 5 is a rear view of the housing shown in FIG. 3.
- FIG. 6 is a cross-sectional view taken along line AA in FIG. 3.
- FIG. 7 is a front view of a nest provided in the component measuring chip shown in FIG. 1.
- FIG. 8 is a side view of the nest shown in FIG. 7.
- FIG. 9 is a rear view of the nest shown in FIG. 7.
- FIG. 10 is a cross-sectional view taken along line BB in FIG. 7.
- FIG. 11 shows blood (with the component measuring chip shown in FIG. 1 attached to the component measuring apparatus). It is a longitudinal cross-sectional view which shows a state when extract
- FIG. 12 is an enlarged detailed view of a region [C] surrounded by a two-dot chain line in FIG. 11.
- FIG. 1 is a perspective view of the component measuring chip of the present invention
- FIG. 2 is a front view of the component measuring chip shown in FIG. 1
- FIG. 3 is a component measuring chip shown in FIG.
- Fig. 4 is a side view of the housing shown in Fig. 3
- Fig. 5 is a rear view of the housing shown in Fig. 3
- Fig. 6 is A in Fig. 3.
- Fig. 7 is a front view of the nest included in the component measuring chip shown in Fig. 1
- Fig. 8 is a side view of the nest shown in Fig. 7
- Fig. 9 is Fig. 10 is a rear view of the insert shown in Fig. 10, Fig.
- FIG. 10 is a cross-sectional view taken along the line B-B in Fig. 7, and Fig. 11 is a blood (body fluid) with the component measuring chip shown in Fig. 1 attached to the component measuring device.
- FIG. 12 is an enlarged detailed view of a region [C] surrounded by a two-dot chain line in FIG.
- the left side in Figs. 1, 11, and 12 is the "tip”
- the right side is the "base end”
- the right side in Figs. 4, 6, 8, and 10 is the "tip.”
- the left side will be described as“ base end ”.
- chip 1 component measuring chip 1 (hereinafter simply referred to as “chip 1”) is used by being mounted on chip mounting portion 101 of component measuring apparatus 100.
- chip mounting state the state where the chip 1 is mounted on the chip mounting portion 101 of the component measuring apparatus 100 is referred to as “chip mounting state”.
- the chip 1 is composed of a housing 6, a nest 7, and a test paper 5 that abuts on the base end side of the nest 7.
- the chip body 2 is constituted by the housing 6 and the insert 7.
- the louvering 6 includes a housing main body 61 and a center pole portion 3 formed in a mountain shape so as to protrude from the tip of the housing main body 61 (chip main body 2). And a through hole 31 formed around the center pole portion 3 or on the inclined surface.
- the insert 7 is formed in the insert body 71, which is in contact with the test paper 5 on the base end side (one side), and the through hole of the housing 6. Inserted into 31 And a protrusion 4.
- test paper 5 is supported and fixed at a peripheral edge portion thereof to a test paper fixing portion 68 provided at the edge of the back surface of the housing 6.
- the method for supporting and fixing the test paper 5 can be performed by, for example, fusion using ultrasonic waves or adhesion using an adhesive. Further, the peripheral edge of the test paper 5 may be sandwiched and pressed by another member from the base end side of the housing 6.
- the front end side surface of the test paper 5 is set so as to contact the proximal end side of the nesting body 71.
- an annular narrow gap is formed between the inner peripheral surface of the through hole 31 and the outer peripheral surface of the protrusion 4.
- a narrow gap can be formed in a wide range of the tip portion 12 of the chip 1.
- the fingertip 400 contacts the distal end portion 12 of the housing 6 (chip 1), the blood 200 can be brought into contact with a narrow gap in a wide range, and the blood 200 can be easily and reliably introduced into the flow path 11. Can do.
- the housing main body 61 has a bottomed cylindrical shape.
- the outer diameter of the Uzing body 61 is approximately equal to or smaller than the outer diameter of the tip of the tip mounting portion 101.
- the outer diameter of the housing body 61 is set substantially equal to the outer diameter of the tip of the chip mounting portion 101.
- a center pole 3 that protrudes toward the front end is provided at the front end side central portion of the bottom 63 (front end) of the housing main body 61.
- the center pole portion 3 has a truncated cone shape (mountain shape).
- the periphery or slope of the center pole portion 3, that is, the center At least one through hole 31 is provided at a position where the central force of the pole portion 3 is also shifted (eccentric).
- the through hole 31 has a circular cross-sectional shape.
- the housing body 61 (housing 6) is formed with a lip portion (bank) 62 protruding in a ring shape (annular shape).
- the lip portion 62 is provided concentrically with the center pole portion 3 so as to surround the outer peripheral side of each through hole 31.
- a housing-side taper portion 64 is provided at the base end-side central portion (back surface) of the bottom 63 of the housing body 61.
- the outer diameter of the housing-side taper portion 64 gradually decreases in the direction opposite to the protruding direction of the center pole portion 3, that is, in the proximal direction.
- a guide pin (projecting portion) 65 slightly projecting in the proximal direction is provided at the center of the housing-side tapered portion 64.
- the guide pin 65 is inserted into a guide hole 73 of the insert 7 described later in an assembled state.
- the housing-side taper portion 64 is provided with four convex portions 66 arranged radially at equal angular intervals.
- a convex portion 66 reduces (narrows) the gap between the nose-side taper portion 64 and the nesting side taper portion 72 described later in the assembled state.
- the blood 200 flowing down the flow path 11 enters the gap between the convex portion 66 and the nesting side taper portion 72, and passes through this gap due to capillary action, and reaches the center of the nesting body 71 (test paper 5). Can be reached easily.
- the inner diameter of the through hole 31 is not particularly limited, but is preferably 0.1 to 5 mm, and more preferably 0.5 to 2 mm, for example.
- the nesting body 71 has a disk shape. [0079] In the assembled state, the nesting body 71 is installed (stored) in the inner cavity 67 of the housing body 61 (groove 6) (see Fig. 11).
- the tip of the nesting body 71 has a plurality of protrusions (in this embodiment,
- Each protrusion 4 has a cylindrical shape, that is, its cross-sectional shape is circular.
- these protrusions 4 are arranged radially at equal angular intervals from the center of the insert 71 (the insert 7).
- each protrusion 5 is formed (provided) so as to correspond to each of the four through holes 31 of the housing 6 in the assembled state.
- the outer diameter of each protrusion 4 is
- the inner diameter of the corresponding through hole 31 is slightly smaller.
- a gap (flow path 11) can be formed between the outer peripheral portion 43 of the protrusion 4 and the inner peripheral portion 311 of the through hole 31 in the assembled state.
- an inclined surface 42 is provided on a part of the tip (top) 41 of each projection 4.
- the inclined surface 42 faces the outer peripheral side (radial direction) of the insert 7.
- a nesting side taper portion 72 is provided on the distal end surface (surface) of the nesting body 71.
- the inner diameter of the nesting side tapered portion 72 is gradually increased in the protruding direction of the protruding portion 4, that is, in the distal end direction. Further, as shown in FIG. 11, the nesting side taper portion 72 faces (is facing) the housing side taper portion 64 in the assembled state.
- the gap 8 can be formed between the nesting side taper portion 72 and the housing side taper portion 64, so that the blood 200 that has passed through the flow path 11 has the gap 8 formed by capillary action. It is surely collected in the center of the nesting body 71 (test paper 5).
- the taper angle of the nesting side taper portion 72 (the angle indicated by ⁇ in FIG. 12) is the taper angle of the housing side taper portion 64 ( ⁇ in FIG. 12). Angle shown) It is set larger.
- the width of the gap 8 (the length indicated by w in FIG. 12) gradually decreases toward the central axis of the chip 1, that is, the gap 8 has a convergent shape, and thus the gap Capillary phenomenon appears prominently near the center 81 of 8. Therefore, the blood 200 that has passed through the flow path 11 can be reliably collected by the central portion of the nesting body 71.
- the gap 8 has a convergent shape, the blood flow rate in the blood 200 gradually increases as the blood 200 in the gap 8 moves toward (flows) toward the central portion 81. As a result, blood 200 can reach test strip 5 quickly.
- the difference between the taper angle a and the taper angle j8 is not particularly limited. For example, it is preferably 1 to 10 degrees, more preferably 3 to 6 degrees.
- a guide hole 73 that penetrates the nesting body 71 is provided at the center of the nesting side taper portion 72 (nesting body 71).
- the guide pin 73 of the housing 6 is inserted into the guide hole 73 in the assembled state.
- the housing 6 and the insert 7 are accurately positioned so that the central axes of the housing 6 and the insert 7 are substantially coincident with each other.
- the guide pin 65 and the guide hole 73 function as blood introduction means for guiding the blood 200 to the test paper 5 in the assembled state.
- the blood 200 in the gap 8 can reach the test paper 5 through the guide hole 73.
- a rib 74 for promoting blood spread into the gap between the test paper 5 and the guide pin 65 is formed on the base end surface (one surface) of the nesting body 71. As shown in FIG. 9, the rib 74 has a substantially cross-shaped shape.
- test paper 5 is fixed to the test paper fixing portion 68 by, for example, a method such as fusion or bonding with an adhesive, and comes into contact with the rib 74.
- the recess 75 has a function of assisting (promoting) the development of the blood 200 on the test paper 5. That is, the blood 200 flowing out from the guide hole 73 spreads radially through the recesses 75 due to capillary action, so that the blood can be developed on the test paper 5 quickly and uniformly.
- the shape, structure, material, etc. of the test paper 5 will be described.
- the overall shape of the test paper 5 is preferably a circle as shown in Fig. 9, but is not limited thereto, and other examples include, for example, an ellipse, a square, a rectangle, a rectangle such as a diamond, a triangle, a hexagon, An octagon or the like can be selected and used as necessary.
- Such a test paper 5 is obtained by carrying (impregnating) a reagent (coloring reagent) on a carrier capable of absorbing the specimen (blood 200).
- This carrier is preferably composed of a porous sheet.
- the reagent to be impregnated is a reagent system including a process using oxygen such as an oxidase reaction
- the oxygen in the atmosphere is developed after the specimen is spread on the test paper 5.
- the reaction can proceed rapidly, so that the color development state can be detected without removing the sample or its filtered components (such as red blood cells).
- Examples of the carrier using the porous sheet include a nonwoven fabric, a woven fabric, a stretched sheet, a membrane filter, and a filter paper.
- examples of the constituent material include polyesters, polyamides, polyolefins, polysulfones, celluloses, silicates, and fluorinated resins. More specifically, for example, polyethylene terephthalate, polyethylene terephthalate, polyethersulfone, nitrocellulose, cellulose, glass, polytetrafluoroethylene (Teflon: “Teflon” is a registered trademark) and the like can be mentioned.
- the constituent material of such a carrier is manufactured by impregnating an aqueous solution in which a reagent is dissolved, and has a hydrophilic material or a hydrophilic treatment in order to rapidly absorb and develop a specimen. Those are preferred.
- Reagents carried on test paper 5 are glucose oxidase (GOD), peroxidase (POD), for example 4-aminoaminopyrine, N-ethyloline N for blood glucose measurement. — (2-Hydroxy-3-sulfopropyl) -m-toluidine and other color formers (coloring reagents).
- GOD glucose oxidase
- POD peroxidase
- 4-aminoaminopyrine 4-aminoaminopyrine
- N-ethyloline N for blood glucose measurement.
- color formers coloring reagents
- color formers coloring reagents
- a buffering agent such as a phosphate buffer may be included.
- the carrier using such a porous sheet preferably has a pore size that does not allow blood cells contained in the blood 200, particularly red blood cells (hereinafter represented by red blood cells) to permeate.
- the pore diameter of the pores in the carrier is preferably about 0.05 to 2.0 m, and more preferably about 0.1 to 0.5 m. If the pore size is too small, the spreadability of blood 200 will be reduced, and if the pore size is too large, blood cells will ooze out and the measurement sensitivity will be reduced, and the drug will not be supported, making the coloration sensitivity low. It becomes (it becomes difficult to color).
- test paper 5 has a development layer composed of a conventionally known mesh non-woven fabric, a light reflection layer composed of fine particles of titanium oxide, and the like, which is formed only by a portion carrying a color reagent. That's right.
- the chip 1 has a minute gap between the outer peripheral portion 43 of each protrusion 4 and the inner peripheral portion 311 of each through-hole 31 into which the protrusion 4 is inserted.
- a cylindrical (but eccentric) gap is formed.
- the gap is used as a flow path 11 for guiding the blood 200 to the test paper 5.
- the flow path 11 is formed by combining two different members, that is, the housing 6 (through hole 31) and the insert 7 (projection 4). It is configured (formed) by a gap.
- the blood 200 adhering to the chip 1 passes through the flow path 11 due to capillary action, even if it is a very small amount, and the test paper 5 instantly supplied. Further, since the gap can be formed in a wide range, the blood 200 can be easily supplied to the test paper 5 in a wide range.
- the top surface (tip) 411 of each projection 4 protrudes from the through hole 31 of the housing 6. This prevents the inlet (opening) of the flow path 11 from being blocked when the tip 12 of the tip 1 is brought into contact (contact) with the surface of the finger 400 or the like when collecting the blood 200, and thus Smooth and reliable supply of blood 200 to test strip 5 Togashi.
- the top surface 411 of each protrusion 4 is located at a position lower than the top surface (tip) 32 of the center pole portion 3, and is located at a position higher than the top surface 621 of the lip portion 62. . That is, the height of the top surface 32 of the center pole portion 3, the top surface 411 of each projection 4, and the top surface 621 of the lip portion 62 are reduced in this order.
- the overall shape of the tip portion 12 of the tip 1 composed of the center pole portion 3, each projection portion 4, and the lip portion 62 is inclined. Therefore, the outer diameter (average) on the tip side of the tip 1 is smaller than the outer diameter on the base end side).
- the attachment position can be easily visually confirmed (confirmed), and thus the chip 1 can be attached accurately.
- each protrusion 4 is in the center of the through hole 31 corresponding to each protrusion 4, and the center of the chip 1 (center pole part 3) Eccentric toward the center axis.
- the width of each channel 11 on the central axis side of the chip 1 is set smaller than the width on the outer peripheral side of the chip 1.
- the tip 1 has four protrusions 4 in the center pole portion in the radial direction (the center axis side of the tip 1).
- each protrusion 4 and the corresponding through hole 31 can be reliably eccentric.
- the housing 6 and the insert 7 are fixed to each other by adhesion or fusion. This prevents the nest 7 from unintentionally leaving the housing 6.
- the constituent materials of the housing 6 and the insert 7 may be the same or different from each other.
- the manufacturing cost can be suppressed.
- At least one of the outer peripheral portion 43 of the protrusion 4 and the inner peripheral portion 311 of the through hole 31 is subjected to a hydrophilic treatment.
- the blood 200 is rapidly (reliably) introduced into the flow path 11, and can thus be reliably reached by the test paper 5.
- the chip body 2 is composed of two members, the housing 6 and the insert 7, in the chip 1, the outer peripheral portion 43 of the protruding portion 4 and the inner peripheral portion 311 of the through hole 31 can be easily subjected to a hydrophilic treatment. Can be applied.
- the hydrophilization treatment includes, for example, plasma treatment, glow discharge, corona discharge, physical activation treatment such as ultraviolet irradiation, surfactant, water-soluble silicon, hydroxypropylcellulose, polyethylene glycol, polypropylene. It can be carried out by application (application) of glycol or the like.
- the above-described chip 1 is the chip mounting portion 1 of the component measuring apparatus (blood component measuring apparatus) 100.
- the component measuring apparatus 100 has a chip mounting part 101.
- the chip mounting part 101 has a cylindrical shape, and the chip 1 is detachably mounted at the tip thereof.
- a photometric unit (not shown) having a light emitting element (light emitting diode) and a light receiving element (photodiode) is provided.
- the light emitting element emits pulsed light at predetermined time intervals.
- the component measuring apparatus 100 includes control means (not shown) configured by a microcomputer.
- This control means includes a calculation unit that calculates a target blood component (eg, glucose) based on a signal from the photometry unit.
- a target blood component eg, glucose
- the chip 1 is mounted on the chip mounting portion 101, and the sample is supplied to and spread on the test paper 5 of the chip 1 as described later, and then measurement is performed.
- the light emitting element When the light emitting element is turned on, it is emitted from the light emitting element.
- the emitted light is irradiated onto the test paper 5 of the chip 1 to obtain the reflected light.
- the intensity of the reflected light corresponds to the color intensity of the test paper 5, that is, the amount (concentration) of the target component in the specimen.
- This reflected light is received by the light receiving element and subjected to photoelectric conversion. From the light receiving element, an analog signal corresponding to the amount of received light is output, and the signal is converted into a digital signal and then input to the control means to perform desired calculation processing, correction processing, etc.
- Ingredient amount is quantified (blood glucose level is determined) o
- test paper 5 In the chip mounting state, the test paper 5 is not in contact with the chip mounting portion 101 (see Fig. 11). Therefore, the test paper 5 is protected and the test paper 5 is prevented from being scratched or torn, and the test paper 5 comes into contact with the chip mounting part 101 and blood 200 adheres to the chip mounting part 101 and is contaminated. Is prevented.
- a fingertip 400 (or earlobe) or the like is punctured with a needle or a scalpel or the like, and a minute amount (for example, 1 ⁇ L or less) of blood 200 flows out (discharges) from the puncture portion onto the skin.
- a minute amount for example, 1 ⁇ L or less
- the tip 1 is attached to the tip attaching portion 101 of the component measuring apparatus 100, and the tip portion 12 of the tip 1 is brought into contact with the skin.
- the blood 200 at the fingertip 400 reaches the flow path 11, is sucked by capillary action, flows in the flow path 11 in the proximal direction, and reaches the test paper 5 through the gap 8 (via). )
- the blood 200 of the fingertip 400 is effectively sucked into the flow path 11, so that there is little loss that is excessively scattered on the skin.
- the flow path 11 is open in a wide range, the allowable range of the spotting position of the blood 200 is large and the spotting is easy.
- the target component eg, glucose
- the reagent carried on the test paper 5 reacts with the reagent carried on the test paper 5 and the color changes depending on the amount of the target component.
- the target component amount (blood glucose level) in the blood can be obtained.
- the chip body is not limited to being constituted by two different members, that is, a housing and a nesting, but may be constituted so as to be integrated.
- the flow path is directly formed in the chip body.
- the numbers of the through-holes of the housing and the protrusions of the inserts are not limited to four, and may be one, two, three, five or more, for example. Good.
- the convex portion provided on the housing-side tapered portion may be provided on the nesting-side tapered portion. Moreover, it may replace with such a convex part and may provide a recessed part.
- At least one of the outer peripheral portion of the protrusion and the inner peripheral portion of the through hole is subjected to a hydrophilic treatment, but instead of this hydrophilic treatment, the outer peripheral portion of the protrusion and Highly hydrophilic materials such as acrylic resin may be used for the inner periphery of the through hole.
- the component measurement chip of the present invention includes a housing having a tip portion for contacting the skin, a through-hole opening in the tip portion, a test paper capable of absorbing the specimen on one side, and the test.
- a component measuring chip configured by combining a nesting body that comes into contact with paper and a nesting formed on the nesting body and having a protrusion inserted into the through-hole, wherein the protrusion of the nesting A channel for guiding the specimen to the test paper through a gap formed between the outer peripheral portion of the projection and the inner peripheral portion of the through hole with the portion inserted into the through hole of the housing Used as Therefore, a narrow flow path is formed in a wide range, so that even a very small amount of sample can be reliably collected. Therefore, the component measuring chip of the present invention has industrial applicability.
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Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006537702A JP4050773B2 (ja) | 2004-09-30 | 2005-09-22 | 成分測定用チップ |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004-288911 | 2004-09-30 | ||
JP2004288911 | 2004-09-30 |
Publications (1)
Publication Number | Publication Date |
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WO2006035675A1 true WO2006035675A1 (ja) | 2006-04-06 |
Family
ID=36118823
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/017506 WO2006035675A1 (ja) | 2004-09-30 | 2005-09-22 | 成分測定用チップ |
Country Status (2)
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JP (1) | JP4050773B2 (ja) |
WO (1) | WO2006035675A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019059335A1 (ja) * | 2017-09-25 | 2019-03-28 | 伸晃化学株式会社 | 液体採取器具 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11318871A (ja) * | 1998-05-20 | 1999-11-24 | Dainabotto Kk | 定量採血具 |
JP2000230904A (ja) * | 1999-02-08 | 2000-08-22 | Terumo Corp | 成分測定用チップ |
JP2001079098A (ja) * | 1999-09-17 | 2001-03-27 | Yoshikawa Kasei Kk | 薬液等の保持部材 |
JP2001087251A (ja) * | 1999-08-03 | 2001-04-03 | Becton Dickinson & Co | ランサー |
WO2003094770A1 (en) * | 2002-05-06 | 2003-11-20 | Beckman Coulter, Inc. | Whole blood sampling device |
-
2005
- 2005-09-22 WO PCT/JP2005/017506 patent/WO2006035675A1/ja active Application Filing
- 2005-09-22 JP JP2006537702A patent/JP4050773B2/ja not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11318871A (ja) * | 1998-05-20 | 1999-11-24 | Dainabotto Kk | 定量採血具 |
JP2000230904A (ja) * | 1999-02-08 | 2000-08-22 | Terumo Corp | 成分測定用チップ |
JP2001087251A (ja) * | 1999-08-03 | 2001-04-03 | Becton Dickinson & Co | ランサー |
JP2001079098A (ja) * | 1999-09-17 | 2001-03-27 | Yoshikawa Kasei Kk | 薬液等の保持部材 |
WO2003094770A1 (en) * | 2002-05-06 | 2003-11-20 | Beckman Coulter, Inc. | Whole blood sampling device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019059335A1 (ja) * | 2017-09-25 | 2019-03-28 | 伸晃化学株式会社 | 液体採取器具 |
JP2019060648A (ja) * | 2017-09-25 | 2019-04-18 | 伸晃化学株式会社 | 液体採取器具 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2006035675A1 (ja) | 2008-05-15 |
JP4050773B2 (ja) | 2008-02-20 |
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