JP3213566B2 - Sample analysis tool, sample analysis method and sample analyzer using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sample analysis tool used for analyzing a sample such as a body fluid, a sample analysis method using the same, and a sample analyzer.

[0002]

2. Description of the Related Art In the field of analytical science, there are various specimens, and particularly in the field of medicine, body fluids such as blood, urine, cerebrospinal fluid, and saliva are important analysis targets. And
It is required that these samples be analyzed in large quantities and collectively.

[0003] In response to such a demand, a sample analysis tool in which a reagent film impregnated with a reagent in advance is adhered to a plate-like piece has been developed and put into practical use. This sample analysis tool supplies blood or the like to the reagent film, and reacts with the reagent to generate a colored substance, thereby coloring the reagent film. The degree of coloration is measured by an optical measuring device such as a densitometer. Analyze. The use of this sample analysis tool simplifies the preparation of reagents and the operation of reacting with a sample, and makes the entire analysis operation routine.

[0004] In such a sample analysis device, methods for supplying a sample to the test film include a method utilizing a capillary phenomenon, an upper spotting method, a dipping method and the like. The method used is widely used. This is because it is necessary to block external light in the optical measurement, and therefore, it is necessary to separate the sample supply point from the analysis unit when the sample analysis tool is set in the optical measurement device. For this reason, it is necessary to move the sample in the sample analysis tool, and as a means for moving the sample, capillary action is used. As a sample analysis tool utilizing capillary action, for example, those described in JP-A-4-18865 or JP-A-57-132900 can be mentioned.

[0005] Fig. 22 shows an example of a sample analysis tool utilizing the capillary phenomenon. As shown, this sample analysis device
An acrylic resin transparent base 47 is provided with a sampling tip 42 protruding in a triangular shape substantially at the center of the front face 44 of the front base 44. A groove 46 extends from the sampling tip 42 toward the rear of the base 47, and a slot 45 is formed as an extension thereof. Are formed. Then, on the upper surface on the front surface 44 side of the base 47,
A test film 48 is stuck so as to cover the groove 46. The configuration of the reagent film 48 is appropriately determined according to the type of the specimen. For example, in the case of analyzing blood plasma components, the filtration layer, the reagent layer, the transparent protective layer, and the opaque protective layer are arranged in this order. The opaque protective layer has a laminated structure that is laminated from below, and an observation window 50 for entering light is provided substantially at the center of the opaque protective layer.
Are formed.

[0006] The analysis using this sample analysis tool is performed as follows. That is, first, one drop of blood collected from the subject is brought into contact with the sampling tip 42. Then, blood is sucked into the groove 46 by capillary action, and the entire groove is filled with blood. When blood penetrates into the test film 48 covering the upper portion of the groove 46, first, blood cell components such as red blood cells are separated by the filtration layer, and the plasma component reaches the reagent layer, where a reaction with the reagent occurs and a colored substance is formed. The reagent layer is colored by the generated color. In this state, the sample analysis tool is set on an optical measuring device such as a densitometer, and light is irradiated from the observation window 50 to measure the degree of coloration of the reagent layer.

[0007]

However, the use of the capillary phenomenon has the following problems.

First, in order for the capillary phenomenon to occur, the capillary introduction channel must always be filled with the sample.
A sample volume larger than that required for analysis is required. In addition, it takes time to introduce the sample, and as a result, it is not possible to perform a quick measurement. Since body fluids such as blood have individual differences in physical properties such as viscosity affecting capillary action, and the introduction time to the analysis section or the like cannot be made the same, the time required for analysis such as reagent reaction time is reduced. It is difficult to make it constant, and an error may occur in the analysis result. In addition, since the suction force due to the capillary phenomenon is weak, it is easily affected by gravity. Therefore, when the sample is introduced, the inclination of the sample analysis tool is limited, and the structure of the optical measurement device is also limited. Since the suction force due to the capillary action is weak, the distance between the sample supply point and the analyzer cannot be increased, so that the optical measurement device completely eliminates contamination of the measurement device and the influence of external light when the sample is introduced. It may not be possible to eliminate it.

On the other hand, the upper spotting method has a problem that when blood is used as a sample, the sampling location is limited to the fingertip, and it is difficult to sample from the ears and abdomen.

The present invention has been made in view of such circumstances, and provides a sample analysis tool capable of analyzing a small amount of sample quickly and accurately, a sample analysis method using the same, and a sample analyzer. With the goal.

[0011]

In order to solve the above-mentioned problems, a sample analyzing device according to the present invention comprises a suction pressure generating means, a suction flow path communicating with the means, and a suction flow path formed in the middle of the suction flow path. An analyzer, and a suction port formed at the tip of the suction flow channel, wherein the sample is sucked from the suction port by a suction pressure generated by the suction pressure generating means, and the sample is supplied to the analysis unit through the suction flow channel. Is moved.

As described above, the device for analyzing a sample according to the present invention forcibly sucks a sample by using a suction pressure instead of using a capillary phenomenon as in the related art. That is, a suction pressure is generated by the suction pressure generating means, the sample is sucked from the suction port by the suction pressure, and then the sample is introduced into the analysis unit through the suction channel by the suction pressure, where the optical means or the electric device is used. The analysis is performed by chemical means. As described above, when the sample is forcibly suctioned by the suction pressure, even a small amount of the sample can be reliably introduced into the analysis unit or the like, and the time required for the introduction is independent of the physical properties such as the viscosity of the sample. Since the analysis can be performed for a fixed short time, for example, when the analysis is performed using the reagent, the reaction time between the sample and the reagent can be fixed. Further, by forcibly aspirating, for example, the amount of the sample to be reacted with the reagent can always be kept constant. As a result, it is possible to prevent an analysis error from occurring.

[0013] Further, since the sample is forcibly suctioned, the sample analysis device of the present invention does not need to limit the distance between the sample supply unit and the analysis unit, and can take a longer distance than suction by capillary action. For this reason, in the optical measuring device, the influence of external light can be eliminated. Therefore, the use of the sample analysis device of the present invention enables quick and accurate analysis with a small amount of sample. In addition, because of the forced suction, the influence of gravity can be almost ignored.

In the present invention, the term "pressure" refers to a pressure for aspirating a sample, and is usually a negative pressure or a negative pressure.

In the present invention, the sample is not particularly limited as long as it can be aspirated, and includes, for example, a liquid and a sol. In addition, examples of the sample to be analyzed in the present invention include whole blood, urine, cerebrospinal fluid, plasma, serum, saliva, and the like.

In the analysis tool of the present invention, the analysis method is not particularly limited, and for example, means such as optical means and electrochemical means can be applied.

As the optical measuring means, a method of using a reagent which reacts with a sample to generate a color product or a reagent which reacts with a sample and forms a color itself is generally used. In some cases, such as the hematocrit value of blood, analysis is performed using only light transmittance or reflectance without using a reagent. Examples of the optical means include, in addition to the measurement of the transmitted light, measurement of reflected light, measurement of fluorescence intensity, and the like.

As the electrochemical means, it is common to measure a change in current or a change in potential due to a redox reaction of a specimen. In this measurement, usually, the reaction with the specimen causes the redox reaction to proceed. Use the reagent that occurs.

The reagent may be a dry type or a wet type. In a sample analysis tool for multi-item simultaneous analysis (hereinafter, referred to as “multi-analysis”) described later, usually, a plurality of types of reagents are used according to analysis items.

In the sample analysis device of the present invention, a plurality of suction channels are provided, an analysis section is formed in the middle of each suction channel, and the tip of each suction channel joins one suction port. Is preferred. This is because so-called multi-analysis, in which a plurality of analysis items can be analyzed at the same time, becomes possible. Note that such a sample analysis tool is referred to as a multi-analysis sample analysis tool.

In the present invention, forcible suction by suction is adopted. However, as will be described later, suction and capillary action may be used together.

Next, as preferred embodiments of the sample analysis device of the present invention, there are a first sample analysis device provided with a bypass flow path and a second sample analysis device provided with a gas-permeable liquid blocking portion. . As described above, the sample analysis device of the present invention includes:
Each of the above-described effects is achieved by employing the forced suction by the suction pressure. However, in the forced aspiration, since the suction force is extremely strong as compared with the suction using the capillary phenomenon, there is a possibility that the sample passes through the analysis unit without stopping. Therefore, the first and second sample analysis tools solve this problem. According to the first and second sample analysis tools, it is not necessary to pay special attention to the generation of the pressure, and the operation is facilitated.

First, the first sample analysis device of the present invention comprises a suction pressure generating means, a suction flow path communicating with the pressure generation means, an analyzer formed in the middle of the suction flow path, In addition to a suction port formed at the tip, a bypass flow path that branches off from a suction flow path between the analysis unit and the suction port and communicates with the suction pressure generation unit is provided. The liquid resistance of the suction flow path (X), the liquid resistance of the bypass flow path (Y), and the liquid resistance of the suction flow path between the branch of the bypass flow path and the analyzer (Z). The relationship between the three liquid resistances is a relationship of X>Y> Z.

That is, in the sample analysis device of the present invention, when the pressure is large, even if a sufficient amount of the sample is introduced into the analysis section or the like, the excess pressure may still remain. When the excess suction pressure remains, the sample introduced into the analysis unit or the like is further sucked into the suction pressure generation means, air is mixed into the analysis unit, or a colored substance generated by reacting with the reagent is generated by the suction pressure generation means. May be leaked. Therefore, the first sample analysis device of the present invention is:
As described above, the bypass flow path is provided, and the liquid resistance (Y) of the bypass flow path and the liquid resistances (X, Z) of the two positions of the suction flow path have a relationship of X>Y> Z. By
This is a solution to this problem.

With this arrangement, even if an excessive pressure is generated by the pressure generation means, the connection between the branch portion of the bypass flow path and the analysis section is established among the three liquid resistances X, Y, and Z. Since the liquid resistance (Z) of the intervening suction channel is minimum, first, the sample is suctioned from the suction port, and a sufficient amount is introduced into the analysis unit. Then, even if an excessive sample or air is sucked by the excess suction pressure, the liquid resistance (X) of the suction flow path between the analysis unit and the suction pressure generating means is changed by the liquid resistance (X) of the bypass flow path. Y), the excess sample or air entrainment
The sample is introduced into the bypass channel, and the sample introduced into the analysis unit, the generated color product, and the like stop here. Then, the excess sample and the mixed air are discharged to the suction pressure generating means through the bypass flow path or the bypass flow path.
As a result, even if a large pressure drop occurs, the sample can be reliably introduced into the analysis unit for analysis, and more accurate and rapid analysis can be realized.

In the present invention, "liquid resistance" means
The resistance received by the liquid when moving in the flow path is an index indicating the ease with which the liquid flows.

As a method of adjusting the liquid resistance of each of the flow paths, for example, a method of changing the diameter of the flow path, treating the liquid contact surface of the flow path with a surfactant or a water repellent, etc. There is a way to change it. Examples of the water repellent include silicon and ethylene tetrafluoride resin.

For the reason that multi-analysis can be performed in the same manner as described above, a plurality of suction channels are provided in the first sample analysis tool, and an analysis section is formed in the middle of each suction channel. It is preferable that the tip of the suction flow path joins one suction port, the bypass flow path branches off from the suction flow path between the junction and the suction port, and communicates with the suction pressure generating means.

Next, the second sample analysis tool comprises a suction pressure generating means, a suction flow path communicating with the suction pressure generation means, an analysis section formed in the middle of the suction flow path, and a tip of the suction flow path. A gas-permeable liquid blocking portion formed in the middle of the suction flow path between the suction pressure generating means and the analysis portion, in addition to the suction port formed in the gas-permeable liquid blocking portion. The part prevents the sample from flowing into the suction pressure generating means.

In the second sample analysis device, the suction flow path between the analysis section, where the gas-permeable liquid blocking section is formed, and the suction pressure generating means is located between the suction flow path and the suction pressure generation means. It is intended to include the boundary of the means and the boundary between the suction channel and the analysis unit.

In the second sample analysis device, the gas permeable liquid blocking portion is usually formed of a hydrophobic porous member.

The second sample analysis device is preferably used for multiple analysis as described below.

That is, in the second sample analysis device,
It is preferable that a plurality of analysis sections are formed in the middle of the suction flow path, and a gas-permeable liquid blocking section is formed in the suction flow path between the suction pressure generating means and the analysis section closest to the suction section.

Further, in the second sample analysis tool, a plurality of suction channels are formed, an analysis section is formed in the middle of each of the suction channels, and the tips of the plurality of suction channels merge into one suction port. Is preferred.

Next, in the sample analysis device of the present invention,
It is preferable that the shape of the suction port is a shape that expands toward the distal end. In this manner, when the suction port has a so-called rough shape, a sample such as blood can be held by the suction port at the time of sampling, and the subsequent suction operation becomes easy. In addition, mixing of air is reduced.
In particular, when collecting blood from a narrow area such as a fingertip, it is necessary to ensure that the suction port of the sample analysis tool is in contact with the collection area until the end of the suction, which requires considerable care. , The operation becomes complicated. In addition, since the amount of blood that can be collected from a fingertip or the like is as small as several tens of μl, air is easily mixed in with a conventional sample analysis device at the time of suction, which greatly affects the measurement result. Therefore,
In order to solve this problem, the shape of the suction port is made low so that the sample can be held. With this configuration, the suction operation can be performed in a state where the suction port is separated from the sampling point, and the sample in the narrow sampling point can be easily sampled without air mixing.

In addition, a liquid reservoir is formed between the suction port and the suction channel, and the air vent channel branches off from the middle of the suction channel between the liquid reservoir and the analyzer. It is also preferable that the front end of the base is open toward the outside. The reason why the air vent channel branches off in the middle of the suction channel between the liquid reservoir and the analyzer is to prevent air from being mixed in when aspirating the sample.

By providing the liquid reservoir and the air vent channel as described above, the sample can be sucked by the capillary phenomenon generated by the air vent channel and held in the liquid reservoir,
Thereafter, the suction operation can be performed in a state in which the suction port is separated from the sampling point without air mixing.

It is preferable that the liquid resistance of the air vent channel is larger than the liquid resistance of the liquid reservoir. By doing so, it is possible to further prevent air from being mixed.

The method of adjusting the liquid resistance includes, for example, a method of changing the size of the cross-sectional area, and a method of changing the wettability by treating the liquid contact surface with a surfactant or a water repellent.
Examples of the water repellent include silicon and ethylene tetrafluoride resin. As a method of adjusting the liquid resistance from the viewpoint of easy adjustment, it is preferable to change the size of the sectional area. Specifically, the thickness and the width of the liquid reservoir may be made larger than those of the air vent channel.

In the sample analysis device of the present invention, the analysis section formed in the middle of the suction flow path may have both the reagent placement section and the reagent reaction section. , A reagent reaction section and an analysis section may be independently provided. Further, a plurality of reagent reaction sections, reagent placement sections, and analysis sections may be provided in the middle of the suction flow path.

That is, in the sample analysis tool, the analysis unit
It is common to have both a reagent placement section and a reagent reaction section, but if the reagent can move through the suction flow path, the reagent placement section, reagent reaction section, and analysis section (hereinafter also referred to as “measurement section”) are each independent. May be provided.
In such a sample analysis device, the effect of mixing and stirring can be obtained by reciprocating the sample and the reagent in each part, and when the reagent is of a dry type, the dissolution of the reagent can be promoted. When the reagent is moved alone,
Either case where the reagent moves together with the sample may be used.

Further, such a sample analysis device can be applied to a multi-step reaction having a pretreatment step. For example, if a plurality of reagent reaction sections and the like are provided in series in the middle of the suction channel, the specimen can be moved while reacting according to the same. For example, in the case of analysis using an antigen-antibody reaction, BF separation is necessary. In such a sample analysis tool, a sample and a washing solution move through a plurality of reagent reaction sections, etc.
Separation becomes possible.

In addition, when using a reagent composed of two or more types of components that cannot mix the components before reacting with the sample, a plurality of reagent placement sections are provided in the middle of the suction flow path. Is preferred.

Next, in the sample analysis device of the present invention,
Examples of the suction pressure generating means include a suction pressure generation chamber and a suction pressure generation tube capable of changing the volume. An air vent hole may be formed in the suction pressure generating chamber.
The pulling pressure generating tube generates pulling pressure by squeezing the tube.

In the sample analysis device of the present invention, when a sample is analyzed by electrochemical means, it is preferable that the analysis section is provided with an electrode comprising a pair of a working electrode and a counter electrode.

Next, in the sample analysis method of the present invention, the sample analysis tool of the present invention is prepared, a suction is generated by a suction generating means, and the sample is sucked from the suction port. This is a method in which the sample is analyzed by introducing the sample into the analysis unit through a suction channel by pressure.

Next, a sample analysis method using the sample analysis tools of the first and second aspects of the present invention is as follows.

First, in the sample analysis method using the first sample analysis tool, the first sample analysis tool is prepared, a sample is sucked from the suction port by generating a suction pressure by the suction pressure generating means, and the sample is sucked. The sample is introduced into the analysis unit through the suction channel by the suction pressure, and the excess sample and the mixed air are discharged into the bypass channel and to the suction pressure generation means by the bypass channel. It is a method of performing analysis.

In the sample analysis method using the second sample analysis tool, a second sample analysis tool is prepared, a suction is generated by a suction generating means, and the sample is sucked from the suction port and aspirated. In this method, the sample is introduced into the analysis unit through the suction channel by the suction pressure, and the sample is analyzed.

In these sample analysis methods, when performing multiple analysis, a plurality of analysis items may be analyzed simultaneously using a multi-analysis sample analysis tool.

In these analysis methods, an analysis method using a sample analysis tool in which the shape of the suction port is sparse or a sample analysis tool in which a liquid reservoir and an air vent channel are formed is performed as follows. . That is, the sample analysis tool is prepared, and the suction port is brought into contact with the sample, the sample is sucked into the suction port or the liquid reservoir by capillary action, and held here,
Then, a suction pressure is generated by a suction pressure generating means, and the sample in the suction port or the liquid reservoir is introduced into the analysis unit through a suction flow path by the suction pressure to analyze the sample.

According to an analysis method using a sample analysis tool in which the shape of the suction port is round or a sample analysis tool in which a liquid reservoir and an air vent channel are formed, for example, a sample at a collection point is sampled. After being brought into contact with the suction port and sucked and held in the suction port or the liquid reservoir, the sample analysis tool may be separated from the sampling location, and the subsequent suction operation is facilitated.

In the sample analysis method of the present invention, the analysis means is not particularly limited, and includes, for example, optical means and electrochemical means.

Next, there are two types of sample analyzers of the present invention, an optical system measuring device and an electric system measuring device.

The optical system measuring apparatus is a sample analyzing apparatus comprising an optical measuring system having a light irradiating section and a light detecting section, and the sample analyzing tool according to any one of claims 1 to 16. The analysis unit of the sample analysis tool is arranged so that light from the light irradiation unit is irradiated, the detection unit,
The apparatus is arranged so that transmitted light, fluorescent light or reflected light of the analysis unit can be detected.

An electrical system measuring device is a sample analyzer comprising an electrical signal applying means, an electrical signal detecting means, and the sample analyzing tool according to claim 17, wherein the working electrode of the sample analyzing tool and the electrical signal applying device are provided. And an electric signal detecting means connected to the counter electrode of the sample analysis tool.

[0057]

Next, an embodiment of the present invention will be described. In the following embodiments, unless otherwise specified, the analysis unit also serves as a reagent placement unit and a reagent reaction unit.

(Embodiment 1) FIG. 1 shows an example of a sample analysis tool of the present invention. FIG. 1A is a plan view of the sample analysis tool, and FIG. 1B is a cross-sectional view in the II direction of FIG. 1A.

As shown in the figure, this sample analysis device is provided with one end of a rectangular plate-shaped main body 5 (the left end in the figure).
However, it takes a shape formed on a projection 5c which is thinner than this, and the width of the projection 5c gradually decreases toward its tip. The main body 5 includes a base 5b and a cover 5a covering the base 5b. The base 5b and the cover 5a are usually integrated by an adhesive such as a hot melt adhesive.

On the surface side of the base 5b, a first flat cylindrical concave portion serving as the suction pressure generating chamber 1 is formed at a portion deviated from the center to one end side (right side in the figure), and is in communication with this. Thus, a groove serving as the suction flow path 2 is formed, and this groove extends to the tip of the protruding portion 5c, and a second flat cylindrical concave portion serving as the analysis unit 3 is provided substantially in the center of the main body 5 in the middle of the groove. Is formed smaller than the first flat cylindrical concave portion, and the tip of the groove is open to the outside at the tip of the protruding portion 5 c, and this opening serves as the suction port 4.
By covering the surface of the base 5b with the cover 5a and integrating them, the first flat columnar concave portion is provided in the suction pressure generating chamber 1, the groove is provided in the suction flow path 2, and the second flat cylindrical recess is provided in the second passage.
Is formed in the analysis section 3 and the tip of the groove is formed in the suction port 4.

In the following embodiments, similarly to this embodiment, by forming flat cylindrical concave portions and grooves, a suction pressure generating chamber, a suction channel, a bypass channel, and the like are formed.

In this figure, the reagent is not shown. For example, when the cover 5a is transparent and light is irradiated from this side, the reagent film impregnated with the reagent is placed on the inner surface of the cover 5a in the analysis section 3. It is stuck. Also,
In the drawing, reference numeral 2a denotes a suction port 4 of the suction flow path 2 and an analysis unit 3
2b indicates a portion between the analysis section 3 of the suction flow path 2 and the suction pressure generating chamber 1, respectively.

The size of the sample analysis device is usually 20 to 50 mm in total length, 10 to 30 mm in width, and 1 to 5 m in overall thickness.
m, protrusion length 10-20 mm, protrusion maximum width 5-10
mm, and the minimum width of the protrusion is 3 to 5 mm. Further, the size of the suction pressure generating chamber 1 is usually 10 to 20 mm in diameter and 0.
2 to 1 mm, and the size of the analysis unit 3 is usually 2 mm in diameter.
5 mm and a depth of 0.1 to 0.5 mm. The size of the suction channel 2 is usually 15 to 40 mm in total length and 1 in width.
３3 mm, depth 0.1〜0.5 mm, length 5 吸引 20 mm of the suction flow path 2 b between the suction pressure generating chamber 1 and the analysis unit 3, suction flow between the analysis unit 3 and the suction port 4 Length of road 2a 10-30
mm.

As a material of the base 5b, for example, acrylonitrile-butadiene-styrene copolymer (AB
S resin), polystyrene, noryl, polyethylene, polyethylene terephthalate (PET), and acrylic resin. Of these, polystyrene and acrylic resin are preferable because of light transmittance and the like.

The cover 5a needs to have elasticity, and when light is irradiated from this side, at least a portion corresponding to the analysis section 3 needs to be transparent.
Examples of the material include PET, polyethylene, and vinyl chloride. Among them, PET is preferable from the viewpoint of workability and dimensional stability.

As described above, the reagent usually takes the form of a reagent film.
It is appropriately determined according to the type of the object to be analyzed. For example, when the plasma component of blood is to be analyzed, a filtration layer for separating red blood cells, a reagent layer impregnated with a reagent, and a substrate,
A configuration in which the layers are stacked in this order is common. Then, the reagent film is placed in the analysis section 3 so that the filtration layer is in contact with the blood (sample) and the irradiation light enters from the transparent protective layer side.
To place. In addition, as a material of each layer of the reagent film, a conventionally known material can be used.

The analysis using this sample analysis tool is performed, for example, as follows.

That is, first, the cover 5a of the suction pressure generating chamber 1 of the sample analyzer is pressed and bent by, for example, pressing it with a finger. Then, in this state, the suction port 4 at the tip of the protruding portion 5c is brought into contact with the sample. Then, when the pressure of the finger that has been pressed is released and the pressure is released, the cover 5 that is bent
a returns to the original state by the elastic force. At this time, a suction pressure is generated, whereby the sample is aspirated from the suction port 4 and further introduced into the analyzer 3 through the suction channel 2a. The introduction into the analysis section 3 is extremely short as compared with the suction by the capillary phenomenon, and is hardly affected by physical properties such as the viscosity of the sample. Then, in the analysis section 3, the sample reacts with the reagent of the reagent film to generate a colored product,
The reagent film is colored. Then, the sample analysis tool having the color of the reagent film is set at a predetermined place of an optical measuring device such as a densitometer. Then, light is irradiated onto the cover 5a, and in the case of the above densitometer, the reflected light is detected by the detection unit, and the degree of coloration is measured. In this sample, when the substrate 5b and the reagent film are also transparent, the analysis can be performed by transmitted light.

(Embodiment 2) Next, in the plan view of FIG.
1 shows an example of a sample analysis device of the present invention for multi-analysis. This sample analysis tool for multi-analysis can simultaneously analyze three analysis items.

As shown in the figure, the sample analysis device has a shape in which one end side (left side in the figure) of a rectangular plate-shaped main body 5 is formed in a projection 5c which is thinner than this. , The width gradually decreases toward the tip. The main body 5 includes a base and a cover that covers the base, as described above.

As in the first embodiment, three suction channels are formed on the front surface side of the base from one suction generation chamber 1 formed at a position shifted from the center of the main body to one end side (right side in the figure). 2b are drawn out, an analysis section 3 is formed at the tip of each suction channel 2b, and a different reagent (not shown) is arranged in each analysis section 3, and three suction channels 2a are provided from each analysis section 3. And these tips are connected to one suction port 4
To join. When the cover is transparent, the reagent is arranged by attaching a reagent film to the inner surface of the cover of the analysis unit 3.

In the sample analysis device for multi-analysis, the overall size is appropriately determined according to the number of analysis items. In this embodiment, since the number of analysis items is three, the overall size is usually 30-80mm, width 20-50m
m, overall thickness 1-5 mm, projection length 10-20 mm,
The maximum width of the protrusion is 5 to 10 mm, and the minimum width of the protrusion is 3 to 5 mm.

In addition, the material, the size of the suction pressure generating chamber, the size of the suction channel, and the like are the same as those of the above-described sample analysis tool. Also,
The number of analysis items is not particularly limited, but usually, the number of analysis items is 1 to 20, preferably 3 to 5. In this case, the analysis section and the suction channel may be formed according to the number of analysis items.

The analysis using the sample analysis tool for multi-analysis is performed, for example, as follows.

That is, first, the cover of the suction pressure generating chamber 1 of the sample analysis tool is pressed and bent by, for example, pressing it with a finger. Then, in this state, the suction port 4 at the tip is
Is brought into contact with the sample. Then, when the pressure of the pressed finger is released to release the pressure, the bent cover returns to the original state by the elastic force. At this time, a suction pressure occurs,
A sample is aspirated from the suction port 4 and further introduced into the three analyzers 3 through the three suction channels 2a. As described above, the introduction into the respective analysis sections 3 is extremely short in comparison with the suction by the capillary phenomenon, and is hardly affected by physical properties such as the viscosity of the sample. Then, in each of the analyzers 3, the sample reacts with the reagent of the reagent film to generate a colored product, and the reagent film is colored. The sample analysis tool with the color of the reagent film is set in a predetermined place of an optical measuring device such as a densitometer. Then, light is applied to this, and in the case of the above densitometer, the reflected light is detected by the detection unit, and the degree of coloration is measured, whereby three analysis items can be analyzed simultaneously.

(Embodiment 3) Next, in the plan view of FIG.
1 shows an example of a sample analysis device of the present invention provided with a bypass flow path.

As shown in the figure, this sample analysis device is also provided with one end (left end in the figure) of the rectangular plate-shaped main body 5.
However, it takes a shape formed on a projection 5c which is thinner than this, and the width of the projection 5c gradually decreases toward its tip. The main body 5 includes a base and a cover that covers the base, as described above.

Then, similarly to the first embodiment, one end side (right side in the figure) from the center of the main body 5 on the surface side of the base 5b.
From the suction pressure generating chamber 1 formed in the portion shifted to
b is drawn out, an analysis section 3 is formed at the tip of the suction flow path 2b, and a reagent (not shown) is arranged in the analysis section 3;
Further, the suction channel 2a is led out from the analysis section 3 and extends toward the tip of the protrusion 5c.
Is formed in the suction port 4. When the cover is transparent, the reagent is arranged by attaching a reagent film to the inner surface of the cover of the analysis unit 3. A bypass flow path 6 branches from a part of the suction flow path 2a between the suction port 4 and the analysis unit 3, and the bypass flow path 6 extends to the suction pressure generating chamber 1 and communicates therewith. I have.

Further, the liquid resistance (X) of the suction flow path 2 b between the suction pressure generating chamber 1 and the analyzer 3, the liquid resistance (Y) of the bypass flow path, and the branch of the bypass flow path 6 The three liquid resistances of the liquid resistance (Z) of the suction flow path 2a with the analysis unit 3 are represented by X
>Y> Z.

That is, as shown in FIG.
a is a flow path having a large diameter as a whole and having the smallest liquid resistance (Z), and the bypass flow path 6 is such that a flow path 6a at a fixed distance from the branch portion becomes a small-diameter bypass flow path. The resistance (Y) has an intermediate size, and the suction flow path 2b has a small diameter as a whole and has the largest liquid resistance (X).

Specifically, the suction flow path 2a is usually
Length 10-30mm, width 1-3mm, depth 0.1-0.
5 mm, and the bypass flow path 6 generally has a total length of 10 mm.
~ 30mm, 0.5 ~ 5m length of the small diameter bypass channel 6a
m, the width of the small-diameter bypass passage 6a is 0.1 to 0.5 mm, the depth of the small-diameter bypass passage 6a is 0.1 to 0.5 mm, the width of the large-diameter bypass passage is 1 to 3 mm, and the large-diameter bypass flow is provided. The depth of the passage is 0.1 to 0.5 mm, and the suction channel 2b is usually 0.5 to 30 mm in length, 0.1 to 0.5 mm in width, and 0.1 to 0.5 mm in depth. is there.

In the sample analysis tool provided with the bypass flow path 6, the overall size, material, size of the suction pressure generating chamber and the like are the same as in the first embodiment.

FIG. 4 is a plan view showing an example in which the small-diameter passage 6a of the bypass passage 6 is relatively long. In this sample analysis device, the bypass channel 6 usually has a total length of 10
３０30 mm, length of narrow bypass channel 6a 3-10 m
m, the width of the small-diameter bypass passage 6a is 0.1 to 0.5 mm, the depth of the small-diameter bypass passage 6a is 0.1 to 0.5 mm, the width of the large-diameter bypass passage is 1 to 3 mm, and the large-diameter bypass flow is provided. The depth of the road is 0.1-0.5 mm. As described above, by increasing the length of the small-diameter bypass flow path 6a, the liquid resistance (Y) of the bypass flow path 6 and the liquid in the suction flow path 2a between the branching portion of the bypass flow path 6 and the analysis unit 3 are increased. The difference from the resistance (Z) can be made large.

Further, in the sample analysis device shown in FIG. 4, the suction port 4 has a so-called roll shape whose width gradually increases toward the distal end. In this way, in sampling the sample, the sample can be held by the suction port 4 having the round shape, the subsequent suction operation can be performed smoothly, and the entry of air can be prevented. The suction port 4 usually has a maximum width of 3 to 6 mm, a minimum width of 1 to 3 mm, and a length of 1 to 5 mm.

In the sample analysis device shown in FIG. 4, the components other than the bypass channel 6 and the suction port 4 are the same as those shown in FIG.

Next, analysis using a sample analysis tool (FIGS. 3 and 4) provided with a bypass channel is performed, for example, as follows.

That is, first, the cover of the suction pressure generating chamber 1 of the sample analysis tool is pressed and bent by, for example, pressing it with a finger. In this state, the suction port 4 of the protrusion 5c is brought into contact with the sample. In this state, when the pressure of the pressed finger is released and the pressure is released, the bent cover returns to the original state by the elastic force.

At this time, a suction pressure is generated. When the suction pressure is larger than necessary, the suction of the sample is performed, for example, as shown in FIG.
It becomes as shown in. That is, since the liquid resistance (Z) of the suction flow path 2a between the bypass flow path 6 branching section and the analysis section 3 is the smallest, first, as shown in FIG. 15 is sucked and further introduced into the analyzer 3 through the suction channel 2a. When the excess suction pressure still remains, the liquid resistance (Y) of the bypass passage 6a becomes
Since the liquid resistance (X) of the suction channel 2b is smaller than that of FIG.
As shown in FIG. 5B, the extra sample 15 and the mixed air flow into the bypass flow path 6, and a part of the air flows into the suction pressure generating chamber 1 as shown in FIG. At this time, since the liquid resistance (X) of the suction channel 2b is the largest, the sample introduced into the analysis unit 3 reacts with a reagent (not shown) without moving as it is to produce a colored substance, and the reagent film is formed. There is no fear that the color is developed and the color-developed material flows out into the suction pressure generating chamber 1. Then, when the excess suction pressure still remains, the excess specimen 15 and the mixed air in the bypass passage 6 are further discharged to the suction pressure generating chamber 1 as shown in FIG.

Then, the sample analyzing tool having the color of the reagent film is set in a predetermined place of an optical measuring device such as a densitometer. Then, this is irradiated with light, and in the case of the above densitometer, the reflected light is detected by the detection unit,
Measure the degree of coloration.

As described above, if the bypass flow path is provided and the liquid resistances of the three flow paths are in the above-mentioned relationship, even if an excess pressure is generated, the sample can be surely introduced into the analysis section and the reagent can be used. The reaction can be carried out, and there is no risk of the generated color product flowing out. Therefore, if the sample analysis tool provided with the bypass flow path is used, the sampling of the sample can be performed promptly without worrying about the pressure of the finger.

(Embodiment 4) FIG. 6 shows an example of a sample analysis tool of the present invention in which an analysis section is formed on the back side of the main body. This sample analysis tool irradiates light from the back side of the main body. 6 (A) is a plan view of the sample analysis tool, and FIG. 6 (B) is a cross-sectional view taken along the line II-II of FIG. 6 (A).

As shown in the figure, the sample analysis device comprises a substantially rectangular plate-shaped main body 5, and this main body 5 comprises a base 5b and a cover 5a covering the surface.

Then, on the surface side of the base 5b, a suction pressure generating chamber 1 is formed at a portion deviated from the center of the main body 5 to one end side (left side in the figure), from which the suction flow path 2b is moved to the other end side of the main body. Extending towards. Then, the suction flow channel 2b is sunk from the front surface side to the back surface side, and is introduced from one end side of the analysis unit 3 formed on the back surface side of the base 5b and is in communication therewith. As shown in the drawing, a reagent film 7 is disposed in the analysis unit 3. Then, a suction flow path 2a is led out from the other end side of the analysis section 3 to the surface side of the base 5b, and the suction flow path 2a is connected to the other end side of the main body (the pressure generation chamber 1) on the surface side of the base 5b. (A side opposite to the opposite side), and the tip is formed in the suction port 4. The suction port 4 has a so-called low shape. Further, a bypass flow path 6 is led out of the suction pressure generating chamber 1, and its tip joins a suction flow path 2 a between the analysis unit 3 and the suction port 4. At the junction of the bypass flow path 6, the bypass flow path 6a has a small diameter, the suction flow path 2b has a small diameter as a whole, and the suction flow path 2a has a small diameter. It has a large diameter. As a result, the liquid resistance (X) of the suction flow path 2b and the bypass flow path 6a
And the liquid resistance (Z) of the suction flow path 2a between the branch part of the bypass flow path 6 and the analysis unit 3 has a relationship of X>Y> Z.

In this sample analysis device, the cover 5a
Is not required to be transparent, but may be transparent because the suction of the sample can be confirmed.

In addition, the materials of the base 5b and the cover 5a, and the sizes of the suction pressure generating chamber and the suction channel are the same as those described above.

Next, analysis using this sample analysis tool is performed, for example, as follows.

That is, first, the cover 5a of the suction pressure generating chamber 1 of the sample analyzer is pressed and bent by, for example, pressing it with a finger. Then, in this state, the suction port 4 is brought into contact with the sample. Then, when the pressure of the pressed finger is released to release the pressure, the bent cover 5a returns to its original state by the elastic force. At this time, a suction pressure is generated, whereby the sample is aspirated from the suction port 4 and further introduced into the analyzer 3 through the suction channel 2a. In this suction, the bypass flow path 6 is provided, and the three liquid resistances (X,
Y, Z) satisfy the relationship of X>Y> Z. Therefore, even if an excess pressure is generated, the sample can be surely introduced into the analysis unit 3 and reacted, and the generated color product There is no risk of outflow to the suction pressure generating chamber 1. Then, the sample analysis tool having the color of the reagent film is set at a predetermined place of an optical measuring device such as a densitometer. Then, light L is radiated onto the back side of the base 5b, and in the case of the densitometer, the reflected light is detected by the detection unit to measure the degree of coloration.

(Embodiment 5) Next, in the plan view of FIG.
1 shows an example of a sample analysis device of the present invention for multi-analysis. This sample analysis tool for multi-analysis can simultaneously analyze three analysis items.

As shown in the figure, the sample analysis device has a shape in which one end side (left side in the figure) of a rectangular plate-shaped main body 5 is formed in a projection 5c which is thinner than this. , The width gradually decreases toward the tip. The main body 5 is composed of a base and a cover covering the surface, as described above.

Then, on the surface side of the base, a portion formed at a position shifted from the center of the main body to one end side (right side in the figure).
Three suction flow paths 2b are led out of the two suction pressure generating chambers 1, and
An analysis unit 3 is formed at the tip of each suction channel 2b,
Different reagents (not shown) are arranged in the respective analysis sections 3, and three suction flow paths 2 a are led out of the respective analysis sections 3, and their tips join one suction port 4. If the cover is transparent,
By attaching a reagent film to the inner surface of the cover. In addition, one bypass flow path 6 is led out of the suction pressure generation chamber 1, and the tip thereof joins the suction port 4. At the confluence of the bypass flow path 6, the bypass flow path 6a has a small diameter, and the suction flow path 2b
Has a small diameter as a whole, and the suction channel 2a has a large diameter as a whole. The liquid resistance (X) of the suction channel 2b, the liquid resistance (Y) of the bypass channel 6, and the bypass channel 6 The liquid resistance (Z) of the suction flow path 2a between the branching portion of the and the analysis section 3 is X>Y>
Z.

In the sample analysis tool for multi-analysis, the overall size is appropriately determined according to the number of analysis items. In this embodiment, since the number of analysis items is three, the total length is usually 20. ~ 50mm, width 20 ~ 50mm,
The overall thickness is 1 to 5 mm, the length of the projection is 10 to 20 mm, the maximum width of the projection is 5 to 20 mm, and the minimum width of the projection is 3 to 5 mm. In addition, the material, the size of the suction pressure generating chamber, the size of the suction flow path, and the like are the same as those of the sample analysis tool provided with the bypass flow path described above. Although the number of analysis items is not particularly limited, the number of analysis items is usually 1 to 20, and preferably 3 to 20.
~ 5 items. In this case, the analysis unit, the bypass channel, and the suction channel may be formed according to the number of analysis items.

The analysis using the sample analysis tool for multi-analysis is performed, for example, as follows.

That is, first, the cover of the suction pressure generating chamber 1 of the sample analysis tool is pressed and bent by, for example, pressing it with a finger. Then, in this state, the suction port 4 of the protruding portion is formed.
Is brought into contact with the sample. Then, when the pressure of the pressed finger is released to release the pressure, the bent cover returns to the original state by the elastic force. At this time, a suction pressure occurs,
A sample is aspirated from the suction port 4 and further introduced into the three analyzers 3 through the three suction channels 2a. In this suction, since the bypass flow path 6 is provided and the three liquid resistances (X, Y, Z) satisfy the relationship of X>Y> Z, the sample can be removed even if an excess pressure is generated. Analysis section 3
And there is no danger of the generated colored product flowing out into the suction pressure generating chamber 1. Then, the sample analysis tool having the color of the reagent film is set at a predetermined place of an optical measuring device such as a densitometer. Then, light is applied to this, and in the case of the above densitometer, the reflected light is detected by the detection unit, and the degree of coloration is measured, whereby three analysis items can be analyzed simultaneously.

(Embodiment 6) In the plan view of FIG. 8, the suction flow path between the suction port and the branch portion of the bypass flow path is meandered and made small in diameter, and the liquid resistance of this flow path is the highest. 1 shows an example of an analysis tool.

As shown in the figure, the sample analyzing device comprises a substantially rectangular plate-shaped main body 5 having one end tapered, and the main body 5 is composed of a base and a cover covering the surface.

On the front side of the base, a suction pressure generating chamber 1 is formed at a position deviated from the center of the main body 5 to the other end (to the right in the figure). The analyzer 3 extends toward the tapered portion, and the analyzer 3 is formed in the middle (substantially at the center of the main body 5). Then, from the analysis section 3, the suction flow path 2a extends to the tapered portion, but meanders in the middle. A bypass flow path 6 branches off from the suction flow path 2a. The bypass flow path 6 is introduced into the suction pressure generating chamber 1 and communicates therewith. In addition, as described above, the bypass flow path 6
The portion from the branching portion is meandering, and the tip is formed in a draw-shaped suction port 4 at the tip of the tapered portion. A reagent is arranged in the analysis unit 3, and this arrangement is performed by attaching a reagent film to the inner surface of the cover of the analysis unit 3 when the cover is transparent.

The suction flow passage 2a between the branch of the bypass flow passage 6 and the analyzer 3 is formed with a large diameter as a whole, and the branch portion 6a of the bypass flow passage 6 is formed with a small diameter. The suction channel 2b is formed to have a small diameter as a whole. The meandering portion of the suction channel 2a is formed to have a small diameter, and its length is longer than that of the suction channel 2b. Therefore, the liquid resistance (W) of the meandering portion of the suction flow path 2a is larger than the liquid resistance (X) of the suction flow path 2b. Therefore, the liquid resistance (W) of the meandering portion of the suction flow path 2a, the liquid resistance (X) of the suction flow path 2b, the liquid resistance (Y) of the bypass flow path 6, and the branch of the bypass flow path 6 are analyzed. The relationship between the four liquid resistances of the suction flow path 2a and the liquid resistance (Z) between the part 3 is W>X>Y> Z.

In this sample analysis device, the meandering portion of the suction channel 2a usually has a total length of 5 to 15 mm and a width of 0.1 to 0.1 mm.
0.5 mm and depth of 0.1 to 0.5 mm. Others
The material, the size of the other part of the suction pressure generating chamber and the suction channel, and the like are the same as those described above.

Next, the analysis using this sample analysis tool is performed, for example, as follows.

That is, first, the cover of the suction pressure generating chamber 1 of the sample analysis tool is pressed and bent by, for example, pressing it with a finger. Then, in this state, the suction port 4 at the tip of the protrusion is brought into contact with the sample. When the pressure of the finger that has been pressed is released to release the pressure, the cover 5a that has been bent returns to the original state due to the elastic force. At this time, a suction pressure is generated, and the sample is sucked from the suction port 4. The four liquid resistances (W, X, Y, Z) satisfy the relationship of W>X>Y> Z. Therefore, even if a sudden pressure drop occurs, the sample can be more reliably introduced into the analyzer 3 and reacted. In addition, since the liquid resistance (W) of the meandering portion of the suction flow path 2a is the highest, the sample or the coloring matter introduced into the reagent reaction section 3 does not flow out to the suction port 4 side. Then, the sample analysis tool having the color of the reagent film is set at a predetermined place of an optical measuring device such as a densitometer. Then, light is radiated to the main body 5 from the surface side, and in the case of the densitometer, the reflected light is detected by the detection section, and the degree of coloration is measured.

(Embodiment 7) FIG. 9 shows an example of the sample analysis device of the present invention. FIG. 9A is a plan view of the sample analysis device, and FIG. 9B is a cross-sectional view taken along the line III-III of FIG. 9A. As shown in the figure, this sample analysis device is formed by laminating a plurality of films, and has a substantially rectangular plate shape. In this sample analysis tool, the suction pressure generating chamber 1 is formed so as to protrude from a portion of the substantially rectangular plate-shaped main body shifted to one end side (right side in the drawing). , A suction flow path 2 extends toward one end (the other end) of the substantially rectangular plate-shaped main body on the side opposite to the suction pressure generating chamber 1, and an analysis section 3 is formed in the middle of the suction flow path 2. The front end of the flow channel 2 communicates with the suction port 4 formed at the other end of the substantially rectangular plate-shaped main body via the liquid reservoir 9. Below the analysis unit 3,
A window 10 is formed. The window 10 is formed as needed. For example, when glucose oxidase (GOD) is used as a reagent, this reagent requires oxygen for a color-forming reaction, so that a window is formed for supplying oxygen. However, except for such a case, if the film portion corresponding to the analysis unit 3 is transparent so that light can enter the analysis unit 3, it is not necessary to form a window.
A test film 7 impregnated with a reagent is arranged below the analysis unit 3 so as to cover the window 10. In the middle of the suction flow path 2b between the suction pressure generating chamber 1 and the analysis unit 3, a gas permeable liquid blocking portion 8 is formed in a portion on the suction pressure generation chamber 1 side. The gas permeable liquid blocking portion 8 is formed by arranging a hydrophobic porous membrane in the middle of the suction channel 2b.

An air vent channel 25 branches off from the middle of the suction channel 2a between the liquid reservoir 9 and the analyzer 3, and its tip 26 is open toward the outside of the main body. ing. In this manner, the opening causes an air vent channel 25 to cause a capillary phenomenon.

The size of the cross-sectional area of the air vent channel 25 is smaller than the size of the cross-sectional area of the liquid reservoir portion 9, so that the liquid resistance of the air vent channel 25 is reduced. 9 is larger than the liquid resistance. Specifically, the width of the liquid reservoir 9 is about four times the width of the suction channel 2 and the air vent channel 25, and the thickness of the liquid reservoir 9 is the thickness of the suction channel 2 and the air vent channel 25. It is about twice as large.

As shown in FIG. 10, such a film-laminated sample analysis tool is composed of, for example, films 11, 12, 13, and 14 formed into various shapes and a test film 7.
It can be manufactured by laminating with a hydrophobic porous film 8 interposed therebetween.

The film 14 is a film that forms the back surface of the sample analysis tool, and has the window 10 formed therein. The film 13 includes a liquid reservoir 9, an air vent channel 25, and an analyzer 3.
In addition, a cut portion for forming the suction channel 2 is formed. The film 12 is for ensuring the thickness (the size of the cross-sectional area of the flow channel) of the liquid storage portion 9, and the cut portion for forming the liquid storage portion 9 and the tip of the air vent channel 25 are opened. Notch and suction channel 2b
Is formed in the suction pressure generating chamber 1. The film 11 has a substantially columnar convex portion for forming the suction pressure generating chamber 1 protrudingly formed, and a circular cutout portion for opening the tip of the air vent channel 25. .

Then, the test film 7 is arranged between the film 14 and the film 13 at the position where the analysis section 3 is formed, and the hydrophobic porous membrane 8 is interposed between the film 13 and the film 12 in the middle of the suction channel 2b. When the four films 14, 13, 12, 11 are laminated and integrated in this order from below in this state, as shown in FIG.
A sample analysis device can be manufactured.

The hydrophobic porous membrane includes, for example, a hydrophobic resin porous membrane, and specific examples thereof include a polyethylene porous membrane, a polypropylene porous membrane, a Teflon porous membrane, and the like. Examples of the hydrophobic resin porous membrane suitable for the present invention include Celgard (trade name, manufactured by Hoechst Celanese) and Hypore (trade name, manufactured by Asahi Kasei Corporation). The average pore diameter of the hydrophobic resin porous membrane is usually 0.1 to 1 μm, preferably 0.3 to 0.7 μm.
μm. Further, the thickness of the hydrophobic resin porous membrane,
Usually, it is 10 to 100 μm. Such a hydrophobic resin porous membrane can be produced, for example, by forming a film using the hydrophobic resin and stretching the film uniaxially or biaxially.

The test film 7 is obtained by impregnating a film with a reagent, and the reagent is appropriately selected according to an object to be analyzed. The configuration of the reagent film is also appropriately determined depending on the type of the object to be analyzed. For example, when a plasma component of blood is to be analyzed, a configuration in which a filtration layer for separating blood cells, a reagent layer impregnated with a reagent, and a base material are generally stacked in this order. Then, the reagent film 7 is arranged in the analysis unit 3 so that the filtration layer is in contact with the blood (liquid sample). In addition, as a material of each layer of the reagent film, a conventionally known material can be used.

[0119] When the sample analysis device of the present invention is manufactured, the films may be integrated by bonding the films to each other using an adhesive or by laminating under pressure or heat.

Examples of the material of the film constituting the sample analysis device include polyethylene, polyethylene terephthalate (PET), polystyrene, polyvinyl chloride and the like. Among them, from the viewpoint of good workability, PET is preferred.

The size of the sample analysis tool shown in FIG.
The overall size is usually 15-60 mm long and 5-20 m wide
m, thickness 1 to 3 mm. The size of the suction pressure generating chamber 1 is usually 3 to 15 mm in diameter and 0.5 to 3 mm in height, and the size of the suction channel 2 is usually 10 to 40 m in total length.
m, channel width 0.5-2 mm, channel thickness 0.1-0.5 m
m, the length of the suction channel 2a is 5 to 30 mm, and the length of the suction channel 2b is 5 to 30 mm. The size of the analysis unit 3 is as follows.
Usually, the diameter is 2 to 10 mm and the height is 0.1 to 1 mm.
The size of the liquid reservoir 9 is usually 2 to 10 mm in length and 2 to 2 in width.
The thickness is 10 mm and the thickness is 0.2 to 1 mm. Intake vent channel 2
5 is usually 2 to 10 mm in total length and 0.5 in channel width.
~ 2 mm, channel thickness 0.1 ~ 0.5 mm, opening diameter 0.
5 to 5 mm. The size of the suction port 4 is usually 2 to 2
The thickness is 10 mm and the thickness is 0.2 to 1 mm.

Next, a sample analysis method using the sample analysis tool shown in FIG. 9 will be described with reference to FIG. In addition,
11, the same parts as those in FIG. 9 are denoted by the same reference numerals.

That is, first, the protruding pressure generating chamber 1 from which the sample analysis tool protrudes is pressed and compressed by, for example, pressing it with a finger. Then, in this state, the suction port 4 is brought into contact with the sample 15 at a predetermined sampling location. Then, Figure 1
As shown in FIG. 1A, the sample 15 is sucked from the suction port 4 by the capillary action generated by the air vent channel 25 and is held in the liquid reservoir 9. Then, the suction port 4 is separated from the sampling location, and then the pressure of the finger that has been pressed is released to release the pressure. Then, the compressed suction pressure generating chamber 1 returns to the original protruding shape again by the elastic force, whereby the suction pressure (negative pressure) is generated.
Occurs. As shown in FIG. 11B, the specimen 15 held in the liquid reservoir 9 is moved by the suction pressure to the suction flow path 2.
This is introduced into the analysis unit 3 through a. The introduction into the analysis section 3 is extremely short as compared with the suction by the capillary phenomenon, and is hardly affected by physical properties such as the viscosity of the sample. Also, in this suction, since the liquid resistance between the liquid reservoir 9 and the air vent channel 25 is adjusted as described above, a part of the sample 15 remains in the air vent channel 25 as shown in FIG. Is prevented. Even if an excessive pressure is generated, the sample 15 does not flow out into the pressure generation chamber 1 because the gas permeable liquid blocking portion 8 is formed, and the sample 15 is reliably introduced into the analysis unit 3. can do. Therefore, there is no need to worry about the degree of finger pressing. Then, in the analysis section 3, the sample 15 and the reagent of the reagent film 7 react with each other to generate a colored product, and the reagent film 7 is colored.
Then, the sample analysis tool on which the color of the reagent film 7 is colored is set at a predetermined place of an optical measuring device such as a densitometer. Then, light is emitted from the window 10 on the back surface, and in the case of the densitometer, the reflected light is detected by the detection unit, and the degree of coloration is measured. In this measurement,
When the entire analysis section 3 is transparent and the reagent film 7 is also transparent, the analysis can be performed by transmitted light.

(Embodiment 8) FIG. 12 is a plan view showing a sample analysis tool for multiple analysis in which a plurality of analysis sections are provided in series.

As shown in the figure, this sample analysis tool has three analyzers 3 provided in the middle of one suction channel 2, and a reagent film 7 is arranged in each analyzer 3. The reagent films 7 are each impregnated with different reagents. Other configurations are the same as those of the sample analysis tool shown in FIG. 9, and the same portions are denoted by the same reference numerals.

This sample analysis device can be manufactured by laminating and integrating a plurality of films of a predetermined shape in the same manner as in the above-described seventh embodiment, and the method and materials used are the same as in the seventh embodiment. is there. The overall size of the sample analysis device is usually 15 to 100 mm in length and 5 to 2 in width.
0 mm and a thickness of 1 to 3 mm. The entire length of the suction channel 2 is usually 20 to 80 mm, and the interval between the analysis sections is usually 3 to 10 mm. The sizes of the other parts are the same as in the seventh embodiment.

In this embodiment, an example in which three analyzers are provided is shown. However, the present invention is not limited to this, and a number of analyzers corresponding to desired measurement items can be provided.

Next, an analysis method using the sample analysis tool for multi-analysis is performed, for example, as follows.

That is, first, the suction pressure generating chamber 1 is pressurized and compressed in the same manner as described above, and in this state, the suction port 4 is brought into contact with a sample at a predetermined sampling point, and the liquid reservoir 9 is formed by capillary action. And hold it here. Then, the suction port 4 is separated from the sampling point, and the pressure in the suction pressure generating chamber 1 is released to generate a suction pressure. The suction pressure is sequentially introduced into the three analysis sections 3 and contained in the respective reagent films 7. React with the reagents.
Then, the sample analysis tool is set at a predetermined position of an optical measurement device capable of performing multi-analysis, and light is irradiated from a window on the back surface of the sample analysis tool to measure the degree of coloration of each reagent film 7. An example of the optical measuring device is a densitometer. As described above, by using the sample analysis tool for multi-analysis, it is possible to simultaneously measure a plurality of measurement items.

(Embodiment 9) The plan view of FIG. 13 shows a sample analysis tool for multiple analysis in which a plurality of analysis sections are provided in parallel.

As shown in the figure, this sample analysis tool has three suction channels 2, each of which forms an analysis section 3, and a reagent film 7 is arranged thereon. This reagent film 7
Each is impregnated with a different reagent. In the three suction channels 2, the suction channels extending from the three analyzers 3 toward the suction port 4 merge into a single suction channel 2 a before the liquid reservoir 9. In addition, the suction pressure generating chamber 1
, Three suction channels 2b are respectively connected to three analysis units 3
It extends to and communicates. The other configuration is the same as that of the sample analysis tool of Embodiment 7 shown in FIG. 9, and the same parts are denoted by the same reference numerals.

This sample analysis device can be manufactured by laminating and integrating a plurality of films of a predetermined shape in the same manner as in Embodiment 7 described above, and the method and materials used are the same as those in Embodiment 1. is there. The overall size of the sample analysis device is usually 15 to 60 mm in length and 10 to 5 in width.
0 mm and a thickness of 1 to 3 mm. The entire length of the suction channel 2 is usually 10 to 40 mm. The interval between the analysis units 3 is usually 3 to 10 mm. The sizes of the other parts are the same as in the seventh embodiment.

In this embodiment, an example in which three analyzers are provided is shown. However, the present invention is not limited to this, and the number of analyzers and suction channels corresponding to desired measurement items can be provided. .

Next, an analysis method using the sample analysis tool for multi-analysis is performed, for example, as follows.

That is, first, the suction pressure generating chamber 1 is pressurized and compressed in the same manner as described above. In this state, the suction port 4 is brought into contact with a sample at a predetermined sampling point, and the liquid reservoir 9 is formed by capillary action. And hold it here. Then, the suction port 4 is separated from the sampling point, the pressure in the suction pressure generating chamber 1 is released, a suction pressure is generated, and the suction pressure is generated in the three analysis sections 3 simultaneously. And react with. And
The sample analysis tool is set at a predetermined position of an optical measurement device capable of performing multi-analysis, and light is irradiated from a window on the back surface of the sample analysis tool to measure the degree of coloration of each reagent film 7.

As described above, by using the sample analysis tool for multi-analysis, it is possible to measure a plurality of measurement items simultaneously. The optical measuring device is, for example, a densitometer.

As described above, in the eighth and ninth embodiments, the sample analysis tool for the multi-analysis has been described.
Whether the analysis units are arranged in series or in parallel is determined by various conditions such as mutual influence of reagents and shape.

(Embodiment 10) FIG. 14 is a plan view showing a sample analyzing tool in which a reagent disposing section, a reagent reacting section and a measuring section are separately provided in the middle of a suction flow path.

As shown in the figure, the sample analysis device is provided with a reagent placement section 32 and a reagent reaction section 3 in the middle of one suction channel 2.
0 and a measuring unit 31 are provided. The reagent placement section 32
Does not particularly change the form of the suction flow path, but merely arranges the reagent in a part of the suction flow path. However, it may be a flat cylindrical space like the reagent reaction section. As a method of disposing the reagent, the reagent may be disposed as it is, or may be attached to the reagent disposing portion using a hydrophilic polymer or the like. Examples of the reagent include a wet type reagent that can move together with a sample, and examples thereof include GOD, peroxidase (POD), 4-aminoantipyrine,
N-ethyl-N- (2-hydroxy-3-sulfopropyl) -3-methylaniline (TOOS) and the like. Note that, even when a dry type reagent is dissolved in a sample, the reagent can be moved together with the sample. And the reagent reaction part 3 is formed like the above-mentioned embodiment except that the reagent film is not arranged. Also, the measuring unit 31
Is transparent so that light can enter,
Like the reagent reaction section 30, it is formed as a flat cylindrical space. Note that an absorbent member such as a filter paper may be arranged in the measuring section 31 in order to fix the moved colored material. The other configuration is the same as that of the sample analysis tool of Embodiment 7 shown in FIG. 9, and the same parts are denoted by the same reference numerals. Further, similarly to the seventh embodiment, the reagent reaction section 30 may also serve as the measurement section. In this case, the reagent reaction section 30 is formed transparent so that light can enter.

This sample analysis device can be manufactured by laminating and integrating a plurality of films of a predetermined shape in the same manner as in the above-described seventh embodiment, and the method and materials used are the same as in the seventh embodiment. is there. Generally, the reagents are generally arranged in advance using a hydrophilic polymer or the like at the time of laminating the film. The overall size of the sample analysis device is usually 15 to 100 mm in length, 5 to 20 mm in width, and 1 to 3 mm in thickness. The entire length of the suction flow path 2 is usually 20 to 80 mm, and the reagent placement section, the reagent reaction section 3
The distance between 0 and the measuring unit 31 is usually 3 to 10 m
m. The sizes of the other parts are the same as in the seventh embodiment.

Next, an analysis method using this sample analysis tool is performed, for example, as follows.

That is, first, the suction pressure generating chamber 1 is pressurized and compressed in the same manner as described above, and in this state, the suction port 4 is brought into contact with a sample at a predetermined sampling point, and the liquid reservoir 9 is formed by capillary action. And hold it here. Then, the suction port 4 is separated from the sampling point, the pressurization of the suction pressure generating chamber 1 is released to generate a suction pressure, and the sample is moved in the order of the reagent disposing unit 32, the reagent reaction unit 30, and the measuring unit 31. Let it. Then, the sample first moves to the reagent reaction section 30 together with the reagent in the reagent placement section 32, where it reacts to generate a colored product. In addition,
The generation of the colored substance may be performed between the reagent reaction section 30 and the measurement section 31. Then, the coloring matter moves to the measuring unit 31.
When a filter paper is arranged in the measuring section 31, it is colored. Then, the sample analysis tool is set at a predetermined position of the optical measurement device, and the measurement unit is irradiated with light, and the degree of coloration of the coloring material or the degree of coloration of the filter paper is measured with an optical measurement device such as a densitometer. Measure. As a condition for this measurement, when the above-mentioned reagent such as GOD is used, the measurement is performed at 570 nm one minute after the reaction.

(Embodiment 11) A plan view of FIG. 15 shows a sample analysis tool provided with two reagent placement sections in the middle of the suction flow path.

As shown in the figure, in the sample analysis device, a first reagent disposition portion 32a and a second reagent disposition portion 32b are formed in the middle of one suction flow path 2, and these are formed in a reagent reaction portion 30. Are formed, and a measuring unit 31 is further formed. Then, usually, the first reagent placement section 32
a, the first reagent is disposed in the second reagent
The second reagent is arranged in b.

The first reagent disposing portion 32a and the second reagent disposing portion 32b are formed in a flat cylindrical space. However, as will be described later, the reagent is dispensed without changing the shape of the suction channel 2. It may be the one just arranged. As for the method of disposing the reagent, the reagent may be disposed as it is as in the above-described Embodiment 10, or may be attached to the reagent disposing portion using a hydrophilic polymer or the like. As described above, examples of the reagent include those composed of two or more components, which cannot be mixed before reacting with the sample. Examples of such a reagent include an enzyme-substrate reagent, and specific examples thereof include trypsin and a reagent based on the substrate, and the substrate usually produces a color product by an enzyme reaction. This reagent is a reagent that can be moved by dissolving and mixing with a sample.

The measuring section 31 is formed as a flat cylindrical space similarly to the reagent arranging section. Note that an absorbent member such as a filter paper may be arranged in the measuring section 31 in order to fix the moved colored material. The other configuration is the same as that of the sample analysis tool of Embodiment 7 shown in FIG. 9, and the same parts are denoted by the same reference numerals. Note that, similarly to the seventh embodiment, the reagent reacting unit and the measuring unit may also be used,
In the case of this embodiment, the second reagent placement section 32b may also serve as the measurement section 31.

This sample analysis device can be manufactured by laminating and integrating a plurality of films of a predetermined shape in the same manner as in the seventh embodiment, and the method and materials used are the same as in the seventh embodiment. is there. In addition, the reagent is generally arranged in advance using a hydrophilic polymer or the like when the constituent films are laminated. The overall size of this sample analysis device is usually 15 to 100 mm long, 5 to 20 mm wide,
The thickness is 1 to 3 mm. The entire length of the suction flow path 2 is usually 20 to 80 mm, and the distance between the reagent disposing portion and the measuring portion is usually 3 to 10 mm. The sizes of the other parts are the same as in the seventh embodiment.

Next, an analysis method using this sample analysis tool is performed, for example, as follows.

That is, first, the suction pressure generating chamber 1 is pressurized and compressed in the same manner as described above, and in this state, the suction port 4 is brought into contact with a sample at a predetermined sampling point, and the liquid reservoir 9 is formed by capillary action. And hold it here. Then, the suction port 4 is separated from the sampling point, and the pressure in the suction pressure generating chamber 1 is released to generate a suction pressure, and the first reagent placement part 32a, the second reagent placement part 32b and the measurement part 31 are generated. The samples are moved in the order described above. Then, the specimen first moves to the second reagent placement section 32b together with the first reagent in the first reagent placement section 32a, where the sample, the first reagent, and the second reagent react. A colored product is formed. It should be noted that the generation of a colored product is performed in the second
Between the reagent arrangement section 32b and the measurement section 31. Then, the coloring matter moves to the measuring unit 31. When a filter paper is arranged in the measuring section 31, it is colored. Then, the sample analyzing tool is set at a predetermined position of the optical measuring device, and the measuring section 31 is irradiated with light to determine the degree of coloration of the coloring matter or the degree of coloring of the filter paper using an optical measuring device such as a densitometer. Measure with

(Embodiment 12) A plan view of FIG. 16 shows a sample analysis tool provided with three reagent placement parts and one measurement part in the middle of the suction flow path. This sample analysis tool combines the structures of the sample analysis tools of Embodiments 10 and 11 described above.

As shown in the figure, the sample analysis device is provided with a first reagent placement portion 32a and a second
Are formed, a reagent disposing portion 32b and a third reagent disposing portion 32c are formed, these form a reagent reacting portion 30, and a measuring portion 31 is further formed. And usually,
A first reagent is arranged in the first reagent arrangement section 32a,
The second reagent is disposed in the second reagent disposing portion 32b, and the third reagent is disposed in the third reagent disposing portion 32c.

The three reagent placement sections 32a, 32b, 3
Reference numeral 2c denotes a case in which the reagent is simply arranged without changing the shape of the suction flow path 2. As for the method of arranging the reagents, the reagents may be arranged as they are as in Embodiment 4 described above, or may be attached to the reagent arranging part using a hydrophilic polymer or the like.
As described above, examples of the reagent include those composed of two or more components, which cannot be mixed before reacting with the sample. Examples of such a reagent include an enzyme-substrate reagent, and specific examples include a reagent comprising trypsin, its substrate, and a buffer. The measurement target of this reagent includes, for example, trypsin inhibitor in urine. In this reagent, the substrate produces a colored product when reacted with the enzyme. And
In the case of this reagent, the first reagent becomes a buffer, the second reagent becomes trypsin, and the third reagent becomes a substrate. In addition, this reagent is dissolved and mixed with the sample,
It is a reagent that can be moved.

The measuring section 31 is formed as a flat cylindrical space. Note that an absorbent member such as a filter paper may be arranged in the measuring section 31 in order to fix the moved colored material. The other configuration is the same as that of the sample analysis tool of Embodiment 7 shown in FIG. 9, and the same parts are denoted by the same reference numerals.

This sample analysis device can be manufactured by laminating and integrating a plurality of films of a predetermined shape in the same manner as in the above-described seventh embodiment, and the method and materials used are the same as in the seventh embodiment. is there. Generally, the reagents are generally arranged in advance using a hydrophilic polymer or the like at the time of laminating the film. The overall size of the sample analysis device is usually 15 to 100 mm in length, 5 to 20 mm in width, and 1 to 3 mm in thickness. The entire length of the suction flow path 2 is usually 20 to 80 mm, and the distance between the reagent disposing portion and the measuring portion is usually 3 to 10 mm. The sizes of the other parts are the same as in the seventh embodiment.

Next, an analysis method using this sample analysis tool will be described by taking as an example the case where the above-mentioned reagent comprising a buffer, trypsin and a substrate is used.

That is, first, the first reagent placement section 32a
Buffer solution, trypsin in the second reagent disposing portion 32b,
A sample analysis tool having a substrate placed in the third reagent placement section 32c is prepared. Then, in the same manner as described above, the suction pressure generating chamber 1 is pressurized and compressed, and in this state, the suction port 4 is brought into contact with a sample (urine) at a predetermined sampling point, and the liquid reservoir 9 is formed by capillary action.
And hold it here. Then, the suction port 4 is separated from the collection point, and the pressure in the suction pressure generating chamber 1 is released to generate a suction pressure, and the first reagent placement portion 32a, the second reagent placement portion 32b, and the third Reagent placement section 32c and measurement section 31
The samples are moved in the order described above. Then, the sample is first
Moves to the second reagent placement section 32b together with the buffer solution in the reagent placement section 32a, where the sample, buffer solution, and trypsin are mixed. Then, the mixture moves to the third reagent disposing portion 32c, where it is mixed with the substrate, and an enzymatic reaction occurs to generate a colored product. In addition, the generation of a colored product is as follows.
The position may be between the third reagent disposing portion 32c and the measuring portion 31.
Then, the coloring matter moves to the measuring unit 31. Measuring unit 3
If a filter paper is placed in 1, it will be colored. Then, the sample analyzing tool is set at a predetermined position of the optical measuring device, and the measuring section 31 is irradiated with light to determine the degree of coloration of the coloring matter or the degree of coloring of the filter paper using an optical measuring device such as a densitometer. Measure with

(Embodiment 13) Next, an embodiment of a sample analysis device of the present invention in which an air vent hole is formed in a suction pressure generating chamber will be described.

FIG. 17 is a sectional view of an example of the sample analysis device. As shown in FIG. 17A, the basic configuration of this sample analysis tool is the same as that of the sample analysis tool of Embodiment 7 shown in FIG. 9, and the same parts are denoted by the same reference numerals. The size of the air vent hole 1a is usually 0.1 mm in diameter.
５5 mm. Analysis of a sample using this sample analysis tool is performed, for example, as follows.

First, the sample is brought into contact with the suction port 4 of the sample analysis tool, and the sample 15 is held in the liquid reservoir 9. And FIG.
As shown in FIG. 7B, the suction pressure generating chamber 1 is pressed with a finger or the like. At this time, the air in the suction pressure generating chamber 1
As a result, the sample is not discharged from the suction port 4 by being pushed by the air in the suction pressure generating chamber 1. And FIG.
As shown in (C), in a state where the suction pressure generating chamber 1 is pressurized,
The air vent hole 1a is closed with a finger or the like. Then, as shown in FIG. 17 (D), when the pressurization of the suction pressure generating chamber 1 is released in a state where the air vent hole 1a is closed, when the suction pressure generating chamber 1 returns to the original shape, the suction pressure is reduced. Then, the sample 15 moves in the suction channel 2 and is introduced into the analyzer 3. The subsequent analysis operation is the same as in the seventh embodiment.

As described above, the air release hole 1 is formed in the suction pressure generating chamber 1.
According to the sample analysis tool in which a is formed, after the sample 15 is brought into contact with the suction port 4 and held in the liquid reservoir, the suction pressure generating chamber 1 can be pressurized. As a result, it becomes easy to collect the sample.

(Embodiment 14) Next, an embodiment of a sample analysis tool of the present invention employing a suction pressure generating tube as a suction pressure generating means will be described.

FIG. 18 shows a cross-sectional view of an example of the sample analysis device. As shown in FIG. 18 (A), this sample analysis tool is the same as the sample analysis tool of Embodiment 7 shown in FIG. 9 except that a suction pressure generation tube 21 is provided instead of the suction pressure generation chamber. The same parts are denoted by the same reference numerals. The suction pressure generating tube 21 can be formed, for example, by mounting a resin sheet on a sample analysis tool main body so as to be curved so that its longitudinal cross-sectional shape is substantially inverted U-shaped. In this case, one end of the suction pressure generating tube communicates with the suction channel 2 via the gas-permeable liquid blocking portion 8, and the other end is open. The size of the pulling pressure generating tube is usually such that the thickness of the sheet is in the range of 0.01 to 2 mm, the height of the tube is in the range of 0.5 to 5 mm, and the width of the tube is 1 to 10 mm.
mm and the length of the tube is in the range of 5 to 30 mm. It is desirable that the suction pressure generating tube 21 is formed so as not to overlap with the suction channel 2, the analysis unit 3, and the like. In order to generate a pulling pressure in the pulling pressure generating tube 21, it is necessary to pressurize the pressure, and it is necessary to squeeze the pressure. However, this pressure may deform the suction channel and the like. As a material for forming the resin sheet, for example, a soft vinyl chloride resin,
Soft silicone resin, natural rubber and the like can be mentioned. Also,
The longitudinal cross-sectional shape of this pulling pressure generating tube is
The shape is not limited to a letter shape, and may be, for example, a rectangular shape.

The analysis of a sample using this sample analysis tool is performed, for example, as follows. First, the sample is brought into contact with the suction port 4 of the sample analysis tool,
Hold 5. Then, as shown in FIG. 18B, a part of the one end side (the right end in the figure) communicating with the suction flow path 2 of the suction pressure generating tube 21 is pressurized with a finger or the like, and the inner surface of the tube is pressed. Adhere. Then, as shown in FIG. 18 (C) and FIG. 18 (D), the pressurized portion is moved to the tube opening side to squeeze the tube. Then, a pulling pressure is generated in the pulling pressure generating tube 21, whereby the sample 15 moves in the suction channel 2 and is introduced into the analyzer 3.
The subsequent analysis operation is the same as in the seventh embodiment.

As described above, according to the sample analysis tool provided with the suction pressure generating tube as the suction pressure generating means, similarly to the sample analysis tool provided with the suction pressure generation chamber having the air vent hole 1a, the suction port is provided. After the sample 15 is brought into contact with 4 and held in the liquid reservoir, a suction operation can be performed. As a result, it becomes easy to collect the sample.

(Embodiment 15) Next, an embodiment of the present invention in which analysis is performed by electrochemical means will be described.

FIG. 19 shows an example of a sample analysis tool provided with electrodes. FIG. 19A is a plan view of the sample analysis tool, and FIG. 19B is a cross-sectional view in the IV-IV direction of FIG. 19A. This drawing is the same as Embodiment 7 shown in FIG. 9 except that electrodes are provided and a window is not formed, and the same portions are denoted by the same reference numerals.

As shown in the figure, the electrodes consist of a working electrode 33a and a counter electrode 33b, which are formed below the analysis section 3, which extend beyond the suction pressure generating chamber 1, respectively. The tips are formed on the terminal portions 33c and 33d.

As in the case of the seventh embodiment, this sample analysis device can be manufactured by laminating films formed in predetermined shapes. For example, as shown in FIG. 20, films 11, 12, 13,
14 can be manufactured by laminating the test film 7 and the hydrophobic porous film 8 via the hydrophobic porous film 8.

The film 14 is a film forming the lower part of the sample analysis tool, and has electrodes (33a, 3a) on its surface.
3b, 33c, 33d) are formed. The electrodes are formed by printing terminal portions (33c, 33d) on a film by screen printing using silver paste, for example.
Similarly, it can be formed by printing and forming the working electrode 33a and the counter electrode 33b with conductive carbon paste by screen printing. For example, in the case of the illustrated shape, the outer diameter of the working electrode 33a is usually in the range of 1 to 14 mm, the outer diameter of the counter electrode 33b is 3 to 15 mm, and the gap width of the two electrodes is It is in the range of 0.5 to 2 mm. The entire length of the electrode including the terminal portion is in the range of 10 to 50 mm. Note that the shape of the electrode is not limited to the illustrated shape.
The material of the film is not particularly limited as long as it is insulating, and examples thereof include PET, polypropylene, and polyester. The film 14 does not have a hole for forming a window. The film 14 does not need to be transparent, and may be colored.

In the manufacture of the sample analysis device, a reagent film 7 separately manufactured may be used.
Alternatively, the reagent film 7 may be formed directly on the electrodes (the working electrode and the counter electrode). For example, a reagent film can be formed by applying and drying a hydrophilic polymer aqueous solution on the electrode portion, and further applying and drying a reagent solution thereon. Examples of the polymer aqueous solution include a 0.5% by weight aqueous solution of carboxymethyl cellulose. As the reagent solution, for example, when lactic acid is to be analyzed,
An aqueous solution containing 400 U / ml of lactate oxidase and 2.0% by weight of potassium ferricyanide can be used. In addition, when glucose is to be analyzed, glucose oxidase may be used instead of lactate oxidase, and similarly, when cholesterol is to be analyzed,
Cholesterol oxidase may be used instead of lactate oxidase.

Next, a sample analysis method using the sample analysis tool will be described. First, as described above, the suction pressure generating chamber 1
Is compressed, and in this state, the suction port 4 is brought into contact with a sample at a predetermined sampling point, and the liquid is sucked into the liquid reservoir 9 by capillary action and held there. Then, the compression of the suction pressure generating chamber 1 is released to generate a suction pressure, and the sample is moved to the reagent film 7 located in the analysis unit 3 and reacted with the reagent. Then, the sample analysis tool is set at a predetermined position of the electrochemical measurement device, and after reacting for a predetermined time, a constant voltage is applied between the working electrode and the counter electrode, and a flowing current is measured.

(Embodiment 16) Next, an embodiment using the sample analysis device of the present invention for analysis using an immunoassay will be described.

FIG. 21A is a plan view showing an example of a sample analysis device for an immunoassay. As shown in the figure, in this sample analysis tool, a liquid reservoir 9a is formed in a flat cylindrical space, and a circular suction port 4a is formed thereon. Further, four analysis units 3a, 3
b, 3c, and 3d are formed, and a reagent film 7a containing an antibody (labeled antibody) that has reacted with the target antigen in the sample and is labeled with a colored substance such as colloidal gold is disposed in the analysis section 3a. Further, a reagent film 7b on which an antibody reacting with the same antigen as described above is immobilized is arranged in the analysis section 3b. Further, a cleaning liquid 16 is disposed in the analysis unit 3d. Other configurations are the same as those of the sample analysis tool of Embodiment 7 shown in FIG. 9, and the same portions are denoted by the same reference numerals.

The immunoassay using this sample analysis device is performed, for example, as shown in FIGS. 21 (B) to 21 (H). First, the suction pressure generating chamber 1 is compressed, and in this state, the suction port 4a is brought into contact with the sample, suctioned into the liquid reservoir 9a by capillary action, and held therein (FIG. 21B). At this time,
The cleaning liquid 16 is pushed by the air discharged from the suction pressure generating chamber, and moves to the analysis unit 3b. Then, the compression of the suction pressure generating chamber 1 is slightly loosened to generate a weak suction pressure, and the sample is sent to the analysis unit 3.
Then, the antigen in the sample is reacted with the labeled antibody (FIG. 21C). At this time, the cleaning liquid has been moved to the analysis unit 3c by the suction pressure. Then, when the compression of the suction pressure generating chamber 1 is completely released and the suction pressure is generated, the sample moves to the analysis unit 3b, and the antigen in the sample reacts with the immobilized antibody (FIG. 21D). . At this time, the cleaning solution 16
Has moved to the analysis unit 3d. Then, the suction pressure generating chamber 1 is lightly compressed again, and the sample is analyzed by the exhaust air.
a (FIG. 21E). Then, the analysis unit 3b
, The antigen bound to the immobilized antibody remains, and this antigen is labeled with a labeled antibody. However, a large number of labeled antibodies not bound to the antigen still remain in the analysis section 3b.
At this time, the cleaning liquid 16 has been moved to the analysis unit 3c. Then, the suction pressure generating chamber 1 is further strongly compressed, and the discharged air moves the specimen to the liquid reservoir 9a and the cleaning liquid 16 to the analyzer 3b (FIG. 21F).
Then, the compression of the suction pressure generating chamber 1 is slightly released to generate a weak suction pressure, and the cleaning liquid 16 is moved to the analysis unit 3c (FIG. 21 (G)). As a result, the analysis unit 3b is washed, and only the antigen bound to both the immobilized antibody and the labeled antibody is present. At this time, the sample has moved to the analyzer 3a. Then, in this state, the amount of the labeled antibody in the analysis section 3c is measured by optical means. After the measurement, the compression of the suction pressure generating chamber 1 is completely released (FIG. 21 (H)), and the sample analysis tool is discarded.

[0175]

As described above, the sample analysis device of the present invention comprises a suction pressure generating means, a suction flow path communicating therewith, an analysis section formed in the middle of the suction flow path, A suction port formed at a tip of a passage, wherein the sample is sucked from the suction port by a suction pressure generated by the suction pressure generating means, and the sample is moved to the analysis unit through the suction channel.

That is, since the sample analysis tool of the present invention forcibly sucks a sample by drawing pressure and moves it to the analysis unit, even a small amount of sample is introduced into the analysis unit in a short time regardless of its viscosity. In addition, the analysis can be performed, and the analysis time and the amount of the analyzed sample can be fixed. Further, it is possible to increase the distance between the sample suction unit and the analysis unit, to eliminate the influence of external light in the optical measurement device, and to prevent contamination of the measurement device when the sample is introduced. Further, since re-suction can be performed even if sampling fails, a small amount of sample can be analyzed reliably. Since the influence of gravity can be ignored, the inclination of the measuring device is not limited. Furthermore, in the sample analysis device of the present invention, since the sample contact portion is limited to the suction port, the entire device is less likely to be contaminated with the sample.

Further, the sample analysis tool of the present invention in which the bypass flow path or the gas-permeable liquid blocking portion is formed allows the sample to be reliably introduced into the analysis section for analysis, and furthermore, the sample and the colored substance No outflow to the means for generating pressure. Therefore, by using this sample analysis tool, a trace amount of sample can be analyzed quickly and accurately. In addition, the sample can be sampled without worrying about how the finger is pressed, thereby improving the analysis efficiency.

In the sample analysis device of the present invention, by providing a plurality of suction channels, analysis sections, and the like, multi-analysis can be performed, and a plurality of analysis items can be analyzed at the same time, thereby greatly improving the analysis efficiency. Be improved.

The sample analysis device of the present invention can be widely applied to a test paper method for a sample such as a body fluid.

Further, the sample analysis tool of the present invention in which the suction port is formed in a so-called roto shape or provided with a liquid reservoir and an air vent channel, aspirates a sample into the suction port or the liquid reservoir and draws the sample there. It can be held. For this reason, if this sample analysis tool is used, even if the sample is located in a place where it is difficult to collect, first, the suction port is brought into contact with the sample, and the sample is sucked and held in the suction port or the liquid reservoir by capillary action. The sample in the suction port or the liquid reservoir can be introduced into the analyzer by suction while the sample is separated from the sampling point. Therefore, this sample analysis device is excellent in operability, and if it is used, a sample can be easily and reliably collected regardless of the collection location. Also, if a liquid reservoir and an air vent channel are provided,
Since re-suction can be performed even if sampling fails, a small amount of sample can be reliably analyzed.

Further, the sample analysis device of the present invention can be applied to, for example, a reagent capable of moving a suction flow path by independently providing a reagent placement section, a reagent reaction section, and a measurement section. Further, if a plurality of reagent disposing portions are provided, the present invention can be applied to a reagent composed of two or more components, which cannot be mixed before reacting with a sample. Further, the sample analysis device of the present invention can be applied to a wide range of analysis irrespective of optical means and electrochemical means.

As described above, since the sample analysis device of the present invention can analyze a small amount of sample quickly and accurately and has excellent analysis efficiency and operability, if it is applied to, for example, medical analysis, Contribute to simplifying complicated analytical tasks,
In addition, its effectiveness is great, for example, it is possible to improve the analysis accuracy.

[Brief description of the drawings]

FIG. 1 (A) is a plan view of an embodiment of a sample analysis device according to the present invention, and FIG. 1 (B) is a diagram showing II in FIG. 1 (A).
It is a direction sectional view.

FIG. 2 is a plan view of another embodiment of the sample analysis device of the present invention.

FIG. 3 is a plan view of still another embodiment of the sample analysis device of the present invention.

FIG. 4 is a plan view of still another embodiment of the sample analysis device of the present invention.

FIGS. 5A to 5D are plan views showing steps of aspirating a sample in one embodiment of the sample analysis tool of the present invention provided with a bypass channel.

FIG. 6 (A) is a plan view of still another embodiment of the sample analysis device of the present invention, and FIG. 6 (B) is the diagram (A).
FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 7 is a plan view of still another embodiment of the sample analysis device of the present invention.

FIG. 8 is a plan view of still another embodiment of the sample analysis device of the present invention.

FIG. 9 (A) is a plan view of still another embodiment of the sample analysis device of the present invention, and FIG. 9 (B) is the above-mentioned diagram (A).
FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 10 is a perspective view showing a state in which the sample analysis tool of the embodiment shown in FIG. 9 is manufactured.

11A is a plan view showing a state in which a sample is sucked and held in a liquid reservoir of the sample analysis device of the embodiment shown in FIG. 9, and FIG. 11B is a plan view of the embodiment shown in FIG. It is a top view showing the state where the sample was aspirated by the analysis part of the sample analysis tool.

FIG. 12 is a plan view of still another embodiment of the sample analysis device of the present invention.

FIG. 13 is a plan view of still another embodiment of the sample analysis device of the present invention.

FIG. 14 is a plan view of still another embodiment of the sample analysis device of the present invention.

FIG. 15 is a plan view of still another embodiment of the sample analysis device of the present invention.

FIG. 16 is a plan view of still another embodiment of the sample analysis device of the present invention.

FIGS. 17 (A) to (D) are cross-sectional views illustrating a sample aspirating state of still another embodiment of the sample analysis device of the present invention.

FIGS. 18A to 18D are cross-sectional views illustrating a sample aspirating state of still another embodiment of the sample analysis device of the present invention.

FIG. 19 (A) is a plan view of still another embodiment of the sample analysis device of the present invention, and FIG. 19 (B) is a cross-sectional view taken along the line IV-IV of FIG.

20 is a perspective view showing a state of manufacturing the sample analysis device of the embodiment shown in FIG. 19;

FIGS. 21 (A) to (H) are plan views illustrating analysis using still another embodiment of the sample analysis device of the present invention.

FIG. 22 is a perspective view of a conventional sample analysis tool.

[Explanation of symbols]

 Reference Signs List 1 suction pressure generating chamber 1a air vent hole 2, 2a, 2b, 2c suction flow path 3, 3a, 3b, 3c, 3d analysis section 4, 4a suction port 5 main body 5a transparent cover 5b resin base 5c projecting section 6 bypass flow path 6a Small-diameter bypass flow path 7, 7a, 7b Reagent film 8 Gas-permeable liquid-blocking part 9, 9a Liquid reservoir 10 Window 11, 12, 13, 14 Film 15 Sample 16 Cleaning liquid 21 Suction pressure generation tube 25 Air vent flow Path 26 Air vent channel tip opening 30 Reagent reaction part 31 Measurement part 32, 32a, 32b, 32c Reagent placement part 33a, 33b, 33c, 33d Electrode 42 Sampling tip 44 Base front surface 45 Slot 46 Groove 47 Base 48 Reagent film 50 Observation window

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masashi Koike 57, Nishi-Akita-cho, Higashi-Kujo, Minami-ku, Kyoto, Kyoto Prefecture (72) Inventor Hisashi Okuda Hisashi Okuda, Higashi-Kujo, Minami-ku, Kyoto, Kyoto 57 Nishiakeda-cho Kyoto Daiichi Kagaku Co., Ltd. (56) References JP-A-8-248026 (JP, A) JP-A-59-191638 (JP, U) (58) Fields investigated (Int. Cl. ^7, DB name) G01N 1/00 101 G01N 1/10 G01N 21/75 G01N 33/48

Claims (24)

(57) [Claims] 1. A suction pressure generating means, a suction flow path communicating with the suction pressure generation means, an analyzer formed in the middle of the suction flow path, and a suction port formed at a tip of the suction flow path, A sample analysis tool for aspirating a sample from the suction port by a suction pressure generated by the suction pressure generating unit and moving the sample to the analysis unit through the suction channel. 2. A suction pressure generating means, a suction flow path communicating with the suction pressure generation means, an analyzer formed in the middle of the suction flow path, and a suction port formed at a tip of the suction flow path. A bypass flow path branched from the suction flow path between the analysis section and the suction port and communicating with the suction pressure generation means, wherein a liquid in the suction flow path between the analysis section and the suction pressure generation means is provided. Resistance (X),
The liquid resistance (Y) of the bypass flow path and the liquid resistance (Z) of the suction flow path between the branch portion and the analysis section of the bypass flow path are in the relationship of X>Y> Z. 2. The sample analysis tool according to claim 1, wherein 3. The specimen according to claim 1, wherein a plurality of suction flow paths are formed, an analysis section is formed in the middle of each of the suction flow paths, and a tip of each of the suction flow paths joins one suction port. Analytical tools. 4. A plurality of suction flow paths are formed, an analysis section is formed in the middle of each suction flow path, a tip of each of the suction flow paths merges into one suction port, and a bypass flow path is formed by the merger. 3. The sample analysis tool according to claim 2, wherein the sample analysis tool branches off from a suction flow path between the section and the suction port and communicates with a suction pressure generating unit. 5. A suction pressure generating means, a suction flow path communicating with the suction pressure generation means, an analyzer formed in the middle of the suction flow path, and a suction port formed at a tip of the suction flow path. A gas permeable liquid blocking portion formed in the middle of the suction flow path between the suction pressure generating means and the analysis section; and The sample analysis device according to claim 1, wherein inflow of the sample is prevented. 6. The sample analysis tool according to claim 5, wherein the gas permeable liquid blocking portion is formed of a hydrophobic porous member. 7. A plurality of analysis sections are formed in the middle of the suction flow path, and a gas-permeable liquid blocking section is formed in the middle of the suction flow path between the suction pressure generating means and the analysis section closest to the suction section. The sample analysis device according to claim 5. 8. A plurality of suction channels are formed, an analysis section is formed in the middle of each of the suction channels, and tips of the plurality of suction channels merge into one suction port. The sample analysis tool according to any one of the above. 9. The sample analysis tool according to claim 1, wherein the shape of the suction port is a shape expanding toward the distal end. 10. A liquid reservoir is formed between the suction port and the suction channel, and the air vent channel branches off from the middle of the suction channel between the liquid reservoir and the analyzer. 9. The front end of the horn is open toward the outside.
The sample analysis tool according to any one of the above. 11. The sample analysis tool according to claim 10, wherein the liquid resistance of the air vent channel is higher than the liquid resistance of the liquid reservoir. 12. The analyzer according to claim 1, wherein the analyzer formed in the middle of the suction channel has both a reagent disposing portion and a reagent reacting portion.
The sample analysis tool according to any one of claims 11 to 11. 13. The sample analysis tool according to claim 1, wherein a reagent placement section, a reagent reaction section, and an analysis section are independently provided in the middle of the suction flow path. 14. The sample analysis tool according to claim 13, wherein a plurality of reagent placement sections are provided in the middle of the suction flow path. 15. The sample analysis tool according to claim 1, wherein the suction pressure generating means is a suction pressure generation chamber capable of changing a volume. 16. The sample analysis tool according to claim 15, wherein an air vent hole is formed in the suction pressure generating chamber. 17. The sample analysis tool according to claim 1, wherein the suction generating means is a suction generating tube. 18. The sample analysis tool according to claim 1, wherein at least one analysis unit includes an electrode comprising a pair of a working electrode and a counter electrode. 19. A sample analysis tool according to claim 1, 3, 5, 6, 7 or 8, wherein a suction pressure is generated by a suction pressure generating means, the sample is sucked from a suction port, and the sucked sample is collected. A sample analysis method for analyzing the sample by introducing the sample into the analysis unit through a suction channel by the suction pressure. 20. A sample analysis tool according to claim 2 or 4, wherein a sample is sucked from a suction port by generating a suction pressure by a suction pressure generating means, and the sucked sample is passed through a suction channel by the suction pressure. A sample analysis method which introduces an excess sample and mixed air into the bypass channel and to the suction generating means through the bypass channel, and analyzes the sample in this state. 21. A sample analysis device according to claim 9, 10 or 11, wherein the sample is drawn into the suction port or the liquid reservoir by capillary action by bringing a suction port into contact with the sample and held therein. Then, a sample analysis method is performed in which a sample is sucked through a suction port by generating a sample pressure by a sample generation unit, and the sample is introduced into the analysis unit through the suction channel by the sample pressure. 22. The method according to claim 1, wherein the analysis of the sample is performed by at least one of optical means and electrochemical means.
The sample analysis method according to any one of 9 to 21. 23. A sample analyzer, comprising: an optical measurement system including a light irradiation unit and a light detection unit; and the sample analysis tool according to claim 1. A sample analyzer, wherein the analyzer is arranged so as to be irradiated with light from the light irradiator, and the detector is arranged so as to detect transmitted light, fluorescence or reflected light of the analyzer. 24. A sample analyzer comprising an electric signal applying unit, an electric signal detecting unit, and the sample analyzing device according to claim 18, wherein a working electrode of the sample analyzing device and the electric signal applying unit are connected. A sample analyzer in which a counter electrode of the sample analysis tool is connected to the electric signal detection means;