WO2023120648A1 - マイクロ流路における流体分注装置およびマイクロ流路デバイス - Google Patents
マイクロ流路における流体分注装置およびマイクロ流路デバイス Download PDFInfo
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- WO2023120648A1 WO2023120648A1 PCT/JP2022/047386 JP2022047386W WO2023120648A1 WO 2023120648 A1 WO2023120648 A1 WO 2023120648A1 JP 2022047386 W JP2022047386 W JP 2022047386W WO 2023120648 A1 WO2023120648 A1 WO 2023120648A1
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- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
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- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6844—Nucleic acid amplification reactions
Definitions
- the present invention relates to a fluid dispensing device for dispensing fluid from a main channel to a plurality of branch channels in a microchannel, and a microdevice having this dispensing device.
- Gene amplification reactions include the PCR (Polymerase Chain Reaction) method and the LAMP (Loop-Mediated Isothermal Amplification) method, etc.
- the PCR method uses synthetic enzymes and primers to amplify DNA along with three-step temperature control.
- the LAMP method amplifies a target base sequence in DNA using primers and strand-displacement synthetase. In the case of using any of these gene amplification reactions, multiple tests required multiple reaction vessels.
- Multiple viral tests may be used, for example, to detect arthropod-borne viral infections (e.g., dengue fever, Zika fever, etc.) and amplify genes associated with such infections.
- the primers for the amplification are fixed in a reaction vessel, and the gene sample collected from the arthropod and the gene amplification reagent are mixed and added to the reaction vessel.
- the same type of virus test is performed using the PCR method in the test for the novel coronavirus infection (COVID-19), which has become prevalent in recent years.
- COVID-19 novel coronavirus infection
- it is not limited to virus testing, but is also applied to genetic testing for food allergens (wheat, buckwheat, peanuts, etc.) and illegal drugs (cannabis, etc.) contained in minute amounts in processed foods.
- inspection devices using microchips such as ⁇ -TAS (Micro Total Analysis Systems) are used, and these devices can be reacted with a small amount of sample.
- an inspection apparatus is configured to form a microchannel and supply a predetermined inspection liquid to a reaction container.
- a main flow path and branch flow paths are configured, and the test liquid is supplied to multiple reaction vessels via the main flow path.
- Patent Document 1 forms a plurality of branched flow paths in a main flow path, and a storage section (reaction vessel) is formed in the branched flow path.
- a storage section reaction vessel
- an exhaust section was connected to the storage section. This configuration of the exhaust section facilitates the smooth supply of the liquid to the storage section, and also facilitates the transfer of the liquid through the main flow path and the branch flow path. There was concern that the storage condition would become unstable and mutual contamination would occur.
- the inventors of the present application provided flow-path internal resistance sections at appropriate positions in the main flow path and the branch flow paths, and caused them to behave like valves, thereby allowing an appropriate amount of We have developed a pipetting device that supplies liquid and does not cause backflow.
- the resistance part in the channel in the above-mentioned dispensing device has a shallow structure in which the bottom of the channel is raised, and the degree of resistance is reduced by providing an inclination to the direction of the channel in the shallow structure part. (burst pressure) is adjusted, and the liquid supplied to the main channel is sequentially dispensed from the upstream side to the branch channels (see Non-Patent Document 1).
- the breaking pressure is adjusted by the angle at which the shallow structure portion is inclined with respect to the direction of the flow channel, the breaking pressure can be adjusted by the size of the angle. If the angle is smaller than 45° with respect to the direction, the degree of resistance becomes small, so as a result, it had to be adjusted in the range of about 90° to 45°. As a result, the difference in breakage pressure becomes small, and there is a problem that many branched flow paths cannot be formed.
- This pipetting device constitutes a channel internal resistance unit that exerts different resistance pressures (burst pressures) before and after the branched channels, and enables dispensing to a plurality of branched channels.
- This technique is capable of forming a branch flow path according to the difference in resistance pressure (burst pressure) due to the resistance part in the flow path.
- the present invention has been made in view of the above points, and its object is to provide a fluid dispensing device in which the number of branch channels is not limited, and a microfluidic device having the dispensing device. That is.
- the present invention relating to a fluid dispensing apparatus in a microchannel includes a main channel for flowing down a fluid in one direction, a plurality of branch channels branching from the main channel, and the branch channels merging at each end. and a common discharge channel, wherein the fluid flowing down the main channel is sequentially divided from the upstream side of the main channel to branch channels, wherein the main channel is connected to each of the branch channels.
- a first flow path internal resistance portion is provided downstream of each branch position in the vicinity of each branch position where the flow path is formed, and each of the branch flow paths is connected to each of the branch positions of the main flow path.
- a chamber region portion having an enlarged flow passage cross-sectional area is provided between the discharge passages and each confluence position, and the discharge passage is located in the vicinity of each confluence position where the branch flow passages merge, with the confluence position as a starting point.
- a second flow path internal resistance section is provided on each side of a confluence position of adjacent branch flow paths, wherein the first flow path internal resistance section and the second flow path internal resistance section each have a flow path cross-sectional area and temporarily impeding the flowing down of the supplied fluid due to surface tension, and the first breaking pressure for releasing from the temporary hindrance of the flowing down by the first resistance part in the flow path is The pressure is greater than the pressure generated by the flow path resistance from the branch position until the fluid reaches the second flow path resistance section, and the flow is freed from temporary obstruction by the second flow path resistance section.
- the second breaking pressure for performing is the first breaking pressure and until the fluid reaches the next-order first flow-path resistance section from the first flow-path resistance section, and from the next-order branch position to the next
- the cross-sectional area of each channel is adjusted so as to be larger than the sum of the pressures generated by the respective channel resistances until reaching the second internal channel resistance portion of the order.
- the first flow path internal resistance section is provided downstream of the branch position formed in the main flow path, and the fluid flowing down the main flow path is temporarily prevented by the first flow path internal resistance section. , and can guide the fluid to the branch flow path.
- the breaking pressure (first breaking pressure) of the first flow path internal resistance section is greater than the pressure generated by the flow path resistance from the branch position until the fluid reaches the second flow path internal resistance section, and , is adjusted to be smaller than the breakdown pressure (second breakdown pressure) of the second flow path internal resistance section, so that after the fluid branched to the branch flow path reaches the second flow path internal resistance section,
- the pressure of the fluid increases, the resistance part in the first flow path breaks down, allowing the fluid to flow down to the next order (downstream side of the main flow path). Therefore, in a plurality of branched flow paths branched from the main flow path, the liquid can be caused to flow sequentially from the upstream branched flow path toward the downstream branched flow path.
- the second flow path internal resistance portion is provided in the vicinity of the confluence position of the branched flow path in the discharge path, the fluid branched to the branched flow path passes through the branched flow path and then reaches the discharge path.
- the flow of the fluid is temporarily blocked in the discharge path by the resistance portion in the second flow path.
- the pressure in the opposite direction acts from the resistance part in the second flow path on the downstream side, and the large pressure that acts intensively on the fluid on the upstream side Since the pressure difference acts on the resistance part and the resistance part in the second flow path on the downstream side, the pressure generated by the fluid supplied to the plurality of branch flow paths is The internal resistance part will not break if it can withstand only the resistance pressure that occurs when dispensing to the next-order branch channel.
- the fluid flows down from the upstream side of the main flow path to each of the branch flow paths in sequence, so that the fluid reaches the end (merge position) of the branch flow path adjacent in the next order.
- the breaking pressure (first breaking pressure) by the first internal resistance portion of the flow path is generated by the flow resistance until the fluid reaches the second internal resistance portion of the first flow path from the first internal resistance portion of the flow path.
- Pressure a burst pressure (second burst pressure) that can withstand the total pressure generated by the flow path resistance from the branch position of the second order until the fluid reaches the resistance part in the second flow path of the second order is applied to the second flow. It is enough for the in-path resistance part to have it, and it does not have to withstand all the pressures generated on the downstream side.
- both the first flow path internal resistance portion and the second flow path resistance portion are configured to reduce the cross-sectional area of the flow path, they can be easily manufactured by a soft lithography technique or the like.
- the channel cross-sectional area of the first channel internal resistance portion provided in the main channel is configured to be larger than the channel cross-sectional area of the second channel internal resistance portion provided in the branch channel.
- the pressure (bursting pressure) for releasing from the state in which the downward flow is obstructed is greater in the second in-path resistance portion than in the first in-path resistance portion. Therefore, the fluid flowing down the main flow path is temporarily prevented from flowing down by the first flow path internal resistance portion near the branch position, flows into the branch flow path, and is temporarily prevented from flowing down at the second flow path internal resistance portion. In the blocked state, only the resistance part in the first flow path breaks due to the difference in the breaking pressure, and flows down the main flow path.
- the flow resistance generated in the branch flow path is added to the pressure of the fluid. Sum of the pressure due to the breakdown pressure of the first flow path resistance section, the flow path resistance up to the next-order first flow path resistance section, and the flow path resistance up to the second flow path resistance section in the branch flow path is adjusted to be greater than Similarly, in the next order, the flowing down is temporarily blocked by the resistance part in the first flow path in the vicinity of the next branching position, and after the fluid is supplied to the branch flow path, the resistance part in the first flow path collapses. Then it flows further down the river. In this way, it is possible to sequentially dispense to all of the predetermined number of branch channels.
- the "branch position" where the branch flow path is formed means the entire opening where the branch flow path opens on the wall surface of the main flow path, and the first flow path internal resistance portion is provided.
- the term “near” the branch position means a location that is continuous with the opening of the branch channel without obstructing the opening of the branch channel and that is appropriately spaced from the branch position.
- the “joint position” formed in the discharge channel also means the entire opening where the branch channel opens on the wall surface of the discharge channel, and the “nearby” means continuous without obstructing the opening, or as appropriate It means a place that is in the state of having an interval.
- Fluid means anything that can seal the air inside the discharge channel, and is usually a liquid fluid, but may be a single liquid or a mixture of multiple liquids There are also cases such as suspensions containing fine particles.
- a microchannel is generally a channel having a channel cross-sectional area of about 0.005 to 2.0 mm 2 , and is used to transfer a microfluid (a minute liquid fluid of about 1 to 500 microliters). , which causes behavior different from that of general liquid feeding due to the surface tension of the microfluid, the viscous resistance with the inner wall surface of the flow channel, and the like.
- the second flow path internal resistance portion may be composed of a single body having a reduced cross section, or may be composed of a plurality of reduced cross section constituent portions.
- the reduced cross-section forming portion is a portion configured to reduce the cross-sectional area of the flow path in order to generate a breaking pressure in the flow path, and the second flow path internal resistance portion is formed by an assembly in which these are arranged at appropriate intervals. It is something that makes When a plurality of such reduced cross-section constituent parts are formed, there is a channel having a normal cross-sectional area between the adjacent reduced cross-section constituent parts, and as a result, the reduced cross-section constituent parts and normal flow paths are alternately arranged.
- the breakdown pressure of the second flow path internal resistance part is determined by the flow path cross-sectional area. Therefore, high dimensional accuracy is required. Therefore, if any one of the plurality of reduced cross-section forming portions has a predetermined cross-sectional area (predetermined breaking pressure), the breaking pressure of the second flow path internal resistance portion as a whole is It will function as a breaking pressure by the cross-sectional structure.
- predetermined breaking pressure predetermined breaking pressure
- a plurality of reduced cross-section forming portions are provided, and the breaking pressure is determined by the reduced cross-section forming portion that has the smallest flow channel cross-sectional area. This ensures the desired breaking pressure.
- the smallest flow path cross-sectional area of the plurality of reduced cross-section forming parts exerts a breakdown pressure higher than the planned. There is no problem even if it is formed in such a state, and on the contrary, a more favorable state is obtained when the breakdown pressure of the second flow path internal resistance portion is increased. Since the flow path resistance changes according to the flow rate of the fluid supplied to the main flow path, a large flow rate of the fluid can be supplied if the breakdown pressure of the second flow path internal resistance portion increases. In particular, even when the flow rate of the fluid to be supplied is not constant, suitable dispensing becomes possible. In such a case, for example, even when the fluid is manually supplied (for example, when the syringe is manually operated), stable dispensing can be achieved.
- the first flow path internal resistance portion and the second flow path internal resistance portion contract only in the width direction of the respective flow paths to reduce the cross-sectional area of the flow path, thereby reducing the fluid flow to be supplied. It can be configured to temporarily inhibit the flow down due to the surface tension of the water. In this way, when both the first flow path internal resistance portion and the second flow path resistance portion are configured to contract only in the width direction to reduce the flow path cross-sectional area, they must be manufactured by soft lithography technology. is facilitated, making it possible to manufacture by a single patterning process (photolithography).
- the first flow path internal resistance portion and the second flow path internal resistance portion are projections formed by bulging from one or both of the flow path inner walls toward the opposite side wall. or an obstruction provided in the flow path.
- the in-channel resistance portion forms a cross-section of the channel that is reduced by the distance from the other opposing side wall, for example, by the protuberant shape that bulges one of the inner walls of the channel.
- the cross section of the flow channel is configured by the gap formed between the inner wall of the flow channel due to the obstruction provided in the flow channel, the cross section of the flow channel can be precisely adjusted. can do.
- a flow path can be formed with a gap formed between the two projections to form a normal flow path. It can be configured to have a channel cross-section that is reduced inwardly.
- the soft lithography technique makes it possible to form these projections or obstacles with a single patterning process (photolithography), even when they are provided.
- the main channel and the discharge channel are formed to have rectangular cross-sections having wall surfaces facing each other, and the first channel internal resistance portion and the second channel internal resistance portion are formed.
- the cross-section of the flow channel may be formed in a rectangular shape by providing the end face of the protrusion or obstruction parallel to the inner wall of the flow channel.
- the channel cross section of each of the main channel and the discharge channel is rectangular, it is easy to fabricate using soft lithography technology.
- the branched flow path can be rectangular, and the chamber region formed in the branched flow path can be easily manufactured by the soft lithography technique because the width of the flow path can be widened. be.
- the protrusion or obstruction forms a rectangular channel cross-section between the end face and the inner wall of the channel, or between the end faces of the protrusions that protrude from the inner wall of the channel and face each other. Therefore, basically, it can be provided in a state in which it protrudes in a rectangular shape from the inner wall of the channel.
- Such protrusions or obstructions can also be easily constructed by soft lithography techniques.
- the branch flow path may be alternately branched to both sides of the main flow path.
- the distance between the branch positions of each branch channel can be shortened compared to the case where a plurality of branch channels are arranged side by side in the same direction from the main channel.
- many reaction vessels (chamber regions) can be arranged in a smaller area by forming a large number of branch channels with a short main channel.
- the main flow path and the discharge path need not be provided linearly, and may be bent or curved.
- both flow paths are formed in concentric arcs in the flow-down direction, and the branch flow paths are arranged radially between the main flow path and the discharge path.
- a dispensing device can be formed. That is, when a large number of branch channels are formed between a straight main channel and a discharge channel, the main channel and the discharge channel are elongated. can be configured within a circular range of a predetermined size.
- the reaction state is determined by a change in color such as hue, saturation, or brightness, it is necessary to irradiate the entire chamber region including the entire chamber region with light. At that time, since the chamber regions are arranged in an arc shape, it is possible to irradiate the light of the single light source substantially evenly over the entire area.
- the present invention pertaining to a microfluidic device is a microfluidic device comprising a plurality of microfluidic channels, wherein the fluid dispensing apparatus according to any one of the configurations of the above respective inventions is configured in a microfluidic chip.
- a main flow path, branch flow paths, and discharge paths that constitute the fluid dispensing device;
- a liquid feeding section that supplies fluid to the main flow path;
- a fluid injection section that injects fluid into the liquid feeding section;
- a reaction container provided in a chamber region formed in the flow path, and an outlet formed continuously at each of the ends of the main flow path and the ends of the branch flow paths and open at the ends. characterized by
- the fluid to be injected into the microchannel chip is dispensed into the plurality of branched channels, while the individual specimens and the like are fixed in the reaction containers provided in the respective chamber regions, and the reagents and the like are individually injected.
- primers for gene amplification caused by each arthropod-borne virus infection e.g., dengue fever, Zika fever, etc.
- the arthropod A mixed solution obtained by mixing a gene sample collected from an animal and a gene amplification reagent can be dispensed into each reaction container.
- the present invention relating to a test chip is a microchannel device comprising a plurality of microchannels, wherein the fluid dispensing apparatus according to any one of the configurations of the above respective inventions is configured in a microchannel chip, and the microchannel device comprises: A main channel, a branch channel, and a discharge channel, which constitute a fluid dispensing device, a liquid sending section for supplying fluid to the main channel, a fluid injection section for injecting fluid into the liquid sending section, and the branch channel. a reaction container provided in a chamber region portion formed in the reaction vessel; The reagent is fixed in the container.
- the reagents are fixed in advance in the reaction containers provided in the respective chamber regions. Therefore, by dispensing the fluid sample into the individual reaction containers, the reaction results with the respective reagents can be obtained. can be obtained.
- different types of reagents that react with pathogenic viruses etc. are fixed in each reaction container, and body fluids and blood (undiluted or diluted fluid) collected from test subjects (humans and animals) are dispensed into each reaction container. This makes it possible to identify viruses that react with various reagents envisioned.
- Such a test chip can also obtain the same effect as the microfluidic device described above.
- the fluid to be dispensed can be manually supplied, the injection pressure can be appropriately adjusted according to the type of fluid to be supplied, and a chip that can be easily inspected anywhere can be provided. will be obtained.
- the fluid supplied to the main channel is in a state of being able to reach the discharge channel via the individual branch channels, and at the confluence position in the discharge channel
- the flow-down is temporarily blocked by the second in-channel resistance portion, so that the air in the channel can be confined in the middle of the adjacent joining positions.
- the second in-channel resistance section arranged on the downstream side via the air in the channel is also It is to destroy. This is because, in order for the air in the flow path to move, it is necessary for the fluid on the downstream side to also move.
- the second flow path internal resistance section operates in order to supply the fluid to the next branched flow path. It is only necessary to have a burst pressure within a range that can exceed the flow path resistance in the flow path and the flow path resistance in the flow path, and as a result, the plurality of second flow path resistance sections filled with the fluid It resists the pressure required to supply the fluid to the branch flow path. Therefore, even when there are a large number of branched flow paths, the resistance pressure is resisted by the second flow path resistance section on the downstream side in accordance with the number of branch flow paths. By providing an appropriate burst pressure, it is possible to provide a device capable of dispensing without limiting the number of branch channels.
- the breaking pressure of the resistance part in the second flow path is made significantly higher than the breaking pressure of the resistance part in the first flow path, when the fluid is supplied to the main flow path at a relatively large flow rate.
- the breakage of the resistance part in the second flow path is suppressed, it is possible to perform dispensing smoothly at high speed.
- the fluid is supplied manually, the flow rate of the fluid to be supplied becomes unstable, but it can be used even in such an environment where the flow rate is not stable.
- the second flow path internal resistance portion is composed of a plurality of reduced cross-section forming portions, high dimensional accuracy is ensured in the portion forming the second flow path internal resistance portion. The minimum breaking pressure of the resistance part in the flow path is guaranteed.
- the dispensing device is formed in a microfluidic chip, and a fluid such as a reagent is injected into a main flow path to dispense into a plurality of branched flow paths.
- the reaction can be processed in the reaction vessel provided in each branch channel.
- the branch flow path is not limited, it is possible to provide the necessary number of reaction vessels for the reaction treatment and to use it for various reaction tests. Moreover, since it can be used even when the fluid is manually supplied, it can be used as appropriate at the place where the reaction test is to be conducted without requiring equipment such as a laboratory.
- a reagent is previously fixed in the reaction container in the microfluidic device having the above configuration, it can be used as a test chip. According to such a test chip, a plurality of reaction tests can be performed at the same time by providing the necessary number of reaction containers for reaction processing and fixing different reagents to the reaction containers.
- FIG. 1 is an explanatory diagram showing an embodiment of a microfluidic device of the present invention
- FIG. 1 is an explanatory diagram showing an embodiment of a dispensing device of the present invention
- FIG. FIG. 4 is an explanatory diagram showing a state of dispensing a fluid in the dispensing device
- FIG. 10 is an explanatory diagram showing the state of fluid dispensed into the first branch channel
- FIG. 11 is an explanatory diagram showing a state in which a fluid is dispensed into a second branch channel
- FIG. 11 is an explanatory diagram showing a state in which a fluid is dispensed into a third branch channel
- FIG. 11 is an explanatory diagram showing a modification in which the configuration of the second in-flow-path resistance portion is changed
- FIG. 2 is an explanatory diagram showing the overall configuration and the dimensions of the main parts of the dispensing device;
- FIG. 10 is an explanatory diagram showing another modified example of the embodiment of the dispensing device;
- FIG. 10 is an explanatory diagram showing another modified example of the embodiment of the dispensing device;
- FIG. 10 is an explanatory diagram showing a usage state of a microfluidic device using a pipetting apparatus according to a modification;
- FIG. 1 shows an embodiment of a microfluidic device.
- 1(a) is a schematic perspective view
- FIG. 1(b) is a cross-sectional view taken along line BB.
- the microfluidic device 1 has a configuration in which a plurality of microfluidic channels are provided in a microfluidic chip.
- a microchannel is generally a channel having a channel cross-sectional area of about 0.005 to 2.0 mm 2 , and is used for transferring microfluids (microscopic liquid fluids of about 1 to 500 microliters). show.
- the microfluidic device 1 of the present embodiment generally has a structure in which two layers are laminated by bonding, and a flow path forming substrate 12 is laminated on a bottom plate (base) 11 .
- a flow path forming substrate 12 is laminated on a bottom plate (base) 11 .
- a channel forming substrate 12 having a channel forming region formed in advance by soft lithography is attached to an adhesive member. 10 is pasted together.
- the bottom plate 11 is made of a glass substrate
- the channel-forming substrate 12 is made of silicone resin (PDMS: polydimethylsiloxane)
- the adhesive member 10 is made of double-sided tape. Fabrication of the channel structure substrate 12 by soft lithography involves patterning a shape that will become the channel portion on a silicon substrate by photolithography, and using this as a mold, silicone resin having a cavity of a predetermined shape such as a channel. is provided.
- the plurality of micro-channels formed in the channel-forming substrate 12 include a liquid-feeding portion 2 and a main channel 3 continuous therewith.
- the liquid feeding section 2 is continuous with the injection section 13 which reaches the surface of the flow path forming substrate 12 and is open, and feeds the fluid injected from the injection section 13 .
- the main flow path 3 constitutes a part of the dispensing device 100 and discharges excess fluid at the end.
- the ends of the channel are the end of the main channel 3 and the end of the discharge channel 4 after passing through the dispensing device 100, which are connected to discharge ports 14 and 15, respectively.
- the discharge ports 14 and 15 are configured to open on the surface of the flow path forming substrate 12, and the discharge port 14 provided in the main flow path 3 discharges excess fluid and exhausts internal air in the flow path.
- the discharge port 15 provided in the discharge passage 4 functions exclusively to discharge the internal air of the discharge passage 4 .
- the dispensing device 100 is composed of channels provided on the channel-forming substrate 12, and includes a branch channel 5 branching from the main channel 3 and a part of the branch channel 5 which is widened.
- a chamber region portion 6 is provided in which a reaction container 7 is provided.
- the branch channel 5 and the chamber region 6 are sequentially branched in the downstream direction of the main channel 3, and each of the plurality of chamber regions 6 is provided with an individual reaction container. 7 is provided.
- the terminal end of the branch channel 5 is configured to be connected to a common (single) discharge channel 4 .
- the main channel 3 and the discharge channel 4 in the dispensing device 100 are each provided with an in-channel resistance portion.
- the in-channel resistance part has a reduced channel width, and the in-channel resistance part provided in the main channel 3 is provided in the vicinity of the branch position with the branch channel 5 and on the downstream side.
- the in-channel resistance portion provided in 5 is provided on the downstream side of the in-discharge channel region that joins the discharge channel 4 at the end of the branch channel 5 .
- the fluid flowing down the main channel 3 reaches the branching position with the branch channel 5, the flow is temporarily blocked by the resistance part in the channel, and the fluid flows into the branch channel 5.
- the liquid can be sent to the downstream side.
- the fluid to be flowed down may be a suspension containing fine particles or the like in addition to the liquid.
- a dispensing device can be formed in the microfluidic chip. It can be dispensed to a plurality of branch channels 5 via the portion 2 and the main channel 3 .
- a plurality of reactions can be processed simultaneously in individual reaction vessels 7 provided in each branch channel 5 (chamber region portion 6).
- the reaction container 7 can be configured integrally with the branch channel 5 (chamber region portion 6), and has a dome shape for storing the fluid necessary for the reaction. It is assumed that the gap part is configured.
- the reaction state can be visually confirmed.
- a reagent that causes a change in color such as hue, saturation or lightness during reaction
- the reaction result can be easily confirmed by visual judgment such as hue after the reaction.
- FIG. 2 illustrates the central configuration of the dispensing device 100, centering on the flow path. It should be noted that the hatched region of the channel portion indicates that it is a fluid (the same shall apply hereinafter).
- a plurality of branch flow paths 5a, 5b, . . . In this embodiment, each channel configuration is illustrated as having a rectangular cross section, and is composed of two parallel wall surfaces opposed to each other on both sides and a mutually parallel bottom surface and top surface.
- flow path internal resistance portions (first flow path internal resistance portions) 8a, 8b, . . . . are provided, and the first flow path internal resistance portions 8a, 8b, . . . It shall be shrunk only to That is, the cross-sectional area of the flow path of the first internal resistance portions 8a, 8b, . . .
- a silicon substrate is patterned by photolithography to form a shape that is to become a flow path portion, and this is used as a mold to form a silicone resin having a cavity of a predetermined shape such as a flow path.
- the manufacturing can be easily performed by the convenience of patterning (one-time process). Therefore, as a structure for reducing the cross-sectional area of the flow path, the wall surface is expanded and contracted only in the width direction. It is not limited to shrinkage.
- the first flow path internal resistance portions 8a, 8b, . . . are provided in the vicinity of the branch positions 31, 32, . Due to the surface tension of the flowing fluid, it is possible to temporarily inhibit the flowing down. Temporary obstruction of flow means that the pressure of the fluid that acts under normal flow cannot flow down because the resistance force due to surface tension prevails, but when the fluid pressure increases, it is possible to flow down beyond the surface tension. It means that the flow prevention state is opened (broken).
- the supplied fluid flows down through the branch flow paths 5a, 5b, . . .
- the fluid can also flow down to the chamber regions 6a, 6b, . . . I am assuming.
- the discharge channel 4 is basically composed of a rectangular channel similar to the main channel 3, and positions (merging positions) 41, 42, . . . are provided in the vicinity of .
- the configuration of the second in-channel resistance portions 9a 1 , 9a 2 . It is configured by a bulged one, and the discharge passage 4 is contracted only in the width direction.
- the direction of contraction in this case similarly to the first in-flow-path resistance portions 8a, 8b, .
- the temporary flow down of the fluid which is going to flow down the discharge channel 4 shall be obstruct
- the second flow path internal resistance portions 9a 1 , 9a 2 As shown in the figure, the second flow path internal resistance portions 9a 1 , 9a 2 , .
- the channel cross-sectional area is reduced by utilizing the gap formed by the end face of the protrusion, it may be configured such that only one of the inner walls of the channel is bulged.
- the first flow path internal resistance portions 8a, 8b Furthermore, when forming both, it is possible to adopt a structure in which an obstructing portion is provided in place of the bulging projection portion.
- the reduction ratio of the flow channel cross-sectional area by the second flow-path internal resistance portions 9a 1 , 9a 2 , . is bigger than That is, the flow channel cross-sectional area of the region where the second flow channel internal resistance portions 9a 1 , 9a 2 , .
- the flow path resistance generated by the second internal flow path resistance portions 9a 1 , 9a 2 , . . . ⁇ It is larger than the flow path resistance caused by This is to provide a difference in the pressure required to release (break) the state in which the flow of the fluid is temporarily blocked by both. Therefore, in a state in which the second in-channel resistance portions 9a 1 , 9a 2 , . It is configured so that it can be done.
- FIG. 3 shows the state of being dispensed into the first branch channel 5a
- FIG. 4 shows the state of the first branch channel 5a being filled with fluid
- FIG. FIG. 6 shows a state in which the fluid is filled up to the third branch channel 5b
- FIG. 6 shows a state in which the fluid is filled up to the third branch channel 5c.
- the first flow path internal resistance portions 8a to 8d provided in the main flow path 3 reduce the width of the flow path to a small flow path width C1.
- the channel cross-sectional area corresponds to the channel width C1. Therefore, when a pressure exceeding a predetermined pressure (burst pressure) P1 acts, the first in-channel resistance parts 8a to 8d are broken. However, if the pressure acting on the fluid is lower than the burst pressure P1 , the downward flow will be hindered and the fluid will be split into the branch flow paths 5a to 5d.
- branch channels 5a to 5d including the chamber regions 6a to 6d
- the branch channels 5a to 5d are not provided with the channel internal resistance portion that reduces the cross-sectional area, the channel resistance due to the flow of the fluid (intra-pipe due to viscosity) Only the pressure P2 due to frictional resistance acts.
- the pressure P2 due to the flow channel resistance is the first flow
- the channel cross-sectional area (gap C1) is adjusted so as to be smaller than the breaking pressure P1 by the in-channel resistance portion 8a, that is, so that the breaking pressure P1 is larger than the pressure P2 of the channel resistance.
- the second flow path internal resistance portion 9a1 is provided at the confluence position 41 of the discharge path 4.
- the burst pressure P3 can hinder the flow of the fluid flowing down the discharge path 4 .
- the second in-channel resistance portion 9a1 has a channel cross-sectional area smaller than that of the first in-channel resistance portion 8a, and is configured with a small channel width C2. As long as the pressure (burst pressure) P3 generated by the second in-flow-path resistance portion 9a1 is not applied to the fluid, the second in-flow-path resistance portion 9a1 breaks down and the fluid flows through the discharge passage 4. will not flow down.
- the breaking pressure by the second flow path resistance portion 9a1 is the pressure (the maximum pressure is the breaking pressure P1 ) when the flow is blocked by the first flow path resistance portion 8a, and Sum of the flow path resistance ⁇ P 1 (L 1 ) from the in-path resistance section to the next-order first flow-path resistance section and the flow path resistance P 2 when flowing down the next-order branch flow path 5b is required to be greater than
- the reason for this is that the first flow path resistance portion 8a is broken while the flow is blocked by the second flow path resistance portion 9a1 , so that the liquid can be dispensed to the next branched flow path 5b.
- the fluid is further supplied, so that the pressure of the entire fluid increases and exceeds the breaking pressure of the first in-channel resistance portion 8a. At this time, the fluid is dispensed to the next branch flow path 5b.
- the breaking pressure P1 of the second order first flow path internal resistance portion 8b and the pressure P2 due to the flow path resistance of the next order branch flow path 5b are the same as the first pressure, the first second flow The pressure of the fluid acting on the in-path resistance portion 9a 1 is P 1 +P 2 + ⁇ P 1 (L 1 ), and the breaking pressure P 3 of the first second in-path resistance portion 9a 1 is greater than the above.
- the second flow path internal resistance portion 9a1 does not break down, and the fluid cannot flow down the discharge path 4. As shown in FIG.
- the fluid is dispensed into the second branched channel 5b and filled up to the confluence position 42 (the resistance portions 9b 1 and 9b 2 in the second channel).
- the flow path air Air is confined in the discharge path 4 between the position 41 and the second confluence position 42.
- the flow path air Air is sealed by fluids at confluence positions 41 and 42 present on both the upstream and downstream sides of the discharge path 4.
- second A breaking pressure P3 is applied by the in-flow-path resistance portions 9a 1 and 9b 2 to impede the outflow (breakdown) of the fluid.
- the flow path air Air is enclosed between the upstream and downstream merging positions 41 and 42, and flows into the upstream merging position 41 (second flow path resistance portion 9a 1 ).
- the pressure of the fluid that has flowed into the merging position (the second in-channel resistance portion 9b 1 ) on the downstream side acts in the opposite direction on the fluid that is flowing through the in-channel air Air.
- the pressure of the fluid becomes P 1 +P 2 + ⁇ P 1 (L 1 ) in the first second in-flow-path resistance portion 9 a 1 , but the second in-flow-path resistance portion 9 b 2 is the total value ( P 1 + P 2 ), and the pressure difference ( ⁇ P 1 (L 1 )), which is the difference, acts on the first second in-flow-path resistance portion 9a 1 . Therefore, in a state in which the flow path air Air is sealed inside the discharge path 4 as described above, the burst pressure P3 required for the first second flow path resistance portion 9a1 is the initial P 1 + P 2 + ⁇ P 1 (L 1 ).
- the following conditions must be satisfied in order to sequentially dispense into the plurality of branch channels 5a, 5b, 5c, . . .
- the surface tension acts between the left and right side walls, the top surface and the bottom surface), and is in a state of swelling in the flowing direction. This bulging state is formed at the position where the contracted flow path expands.
- the burst pressures P 1 and P 3 at this time can be calculated based on the shape of the bulge, taking into account the coefficient of viscosity. Since this calculation method is described in detail in Japanese Patent Application No. 2020-190959, it will be omitted here.
- the fluid is sequentially dispensed into the branched channels 5a, 5b, . . . Since the internal resistance portion 9a1 does not break down and prevents flow down in the discharge passage 4, a large number of branch passages 5a, 5b, . becomes. This can be demonstrated by sequentially dispensing from the upstream side to the plurality of branched channels 5a, 5b, . . . It is realized by applying a breaking pressure by the in-path resistance portions 8a, 8b, . . .
- FIG. As shown in this figure, there are a main channel 3, a discharge channel 4, branch channels (including chamber regions 6a, 6b, . . . ) 5a, 5b, . 8b , . _
- individual second flow path resistance portions 9a 1 , 9a 2 , 9b 1 , 9b 2 , . 9a 1 is composed of, for example, four reduced cross-section forming portions 91a 1 , 92a 1 , 93a 1 , and 94a 1 .
- Each of the reduced cross-section forming portions 91a 1 to 94a 1 basically bulges on both sides of the channel side wall and uses the gaps formed by the end faces to reduce the cross-sectional area. has the same configuration as the second in-flow-path resistance portion 9a1 having a single configuration in .
- the intermediate passage widths of these reduced cross-section forming portions 91a 1 to 94a 1 are discharged. It has the same cross-sectional area as the passage 4 (that is, a normal flow passage cross-sectional area), and when the reduced cross-section forming portion 91a1 on the most upstream side breaks, the breaking pressure P3 by the reduced cross-section forming portion 92a1 in the next order can function. It is possible.
- the breaking pressure P 3 as a whole does not increase. That is, when the pressure of the fluid acting on the second flow path internal resistance portion 9a1 exceeds the breaking pressure P3 , the reduced cross-section forming portion 91a1 on the most upstream side breaks, This is because the pressure of the fluid similarly acts on the next reduced cross-section forming portion 92a1 , so that the collapse cannot be prevented. Nevertheless, the reason for forming the plurality of reduced cross-section forming portions 91a 1 to 94a 1 in this way is to secure the breaking pressure P 3 .
- protrusions or obstacles are formed in the flow path, and in order to form the expected cross-sectional area of the flow path, these protrusions or obstacles must be precisely formed. must be made.
- the size of these projections or obstacles is extremely small, so maintaining the accuracy may not be easy.
- FIG. 1 A schematic of this fluid dispensing device is shown in FIG.
- the experimental fluid dispensing device 200 has four branch channels 5a to 5e, and a mixing channel M is specially provided in the main channel 3.
- FIG. Note that the second flow path internal resistance portion 9a2 is not provided on the upstream side of the confluence position 41 where the first branch flow path 5a joins the discharge path 4 (configuration of the embodiment).
- each channel in such a configuration is shown in the figure.
- the depth dimension (H) of each channel was set to 50 ⁇ m.
- the flow path cross-sectional area is 0.002 mm 2 .
- the flow-path cross-sectional area is configured to be 0.001 mm 2 .
- ⁇ Dispense experiment> A dispensing experiment was conducted using the fluid dispensing device 200 manufactured as described above. Silicone resin was used as the resin forming the flow path, and double-sided tape No. 2 manufactured by Nitto Denko Co., Ltd. was used as an adhesive member for adhesion to the glass substrate. 5303W was used. Water was used as the fluid to be dispensed, and was supplied from the injection part 13 while maintaining the flow rate at 50 ⁇ L/min. As a result, the liquid was dispensed into each of the five branch flow paths 5a to 5e (including the chamber region portions 6a to 6e), and none of the second flow path internal resistance portions 9a 1 to 9e 2 were broken. .
- fluid water was manually injected into the above two types of experimental dispensing channels. Since the fluid (water) is supplied manually, it is assumed that the flow rate is not stable, but it was converted based on the time from the start of injection to the end. there were. In this case as well, both pipetting devices were able to dispense into all of the branch channels, and no collapse phenomenon of the resistance part in the second channel occurred.
- the theoretical breakdown pressure (P 3 ) in the second flow path internal resistance portion 9 is 8.06 kPa, and the pressure (P 1 +P 2 + ⁇ P 1 (L The theoretical value of the sum of 1 )) was 5.90 kPa. Therefore, it was found that the above formula (Equation 1) is satisfied, and the dispensing is theoretically possible.
- the flow rate is approximately 66 ⁇ L/min. In the case of a pipetting device for experiments, it is assumed that pipetting can be performed without any problem if the flow rate is 80 ⁇ m/min or less.
- the channel resistance ( ⁇ P 1 (L 1 )) can be kept small, so it is possible to dispense with a higher flow rate. is.
- the condition satisfying the above formula (Equation 1) changes. A further increase in flow rate can also be expected.
- the fluid supplied to the main flow path 3 can be sequentially dispensed from the branch flow path 5 branched on the upstream side,
- the same supply fluid can be individually dispensed into individual reaction containers, and different tests can be performed for each reaction container.
- the first flow path internal resistance portion 8 and the second flow path internal resistance portion 9 reduce the cross-sectional area of the flow path and temporarily inhibit the flowing down of the supplied fluid due to the surface tension.
- the breakdown pressure P 3 by the in-flow resistance portion 9 is the breakdown pressure P 1 in the first flow-path resistance portion 8 and the first flow in the next order from the branch position.
- the pressure ⁇ P 1 (L 1 ) generated by the flow path resistance until it reaches the in-path resistance portion 8 and the fluid to be dispensed to the next branched flow path reach the second in-path resistance portion 9 of the next order.
- each branch flow channel 5 Dispensing to each branch flow channel 5 is possible as long as the condition is such that the pressure P2 generated by the flow channel resistance up to is larger than the sum total.
- the above conditions differ depending on the dimensions (especially width dimensions) that determine the cross-sectional area of each flow path, and also vary depending on the flow rate of the fluid supplied to the main flow path 3. By appropriately adjusting the supply flow rate accordingly, it is possible to dispense to a large number of branch channels.
- the dispensing apparatus not only the dispensing apparatus but also the microfluidic device can be easily manufactured using soft lithography technology.
- the channel width it is possible to easily improve the dimensional accuracy in the case of using the soft lithography technique.
- the breaking pressures P 1 and P 3 by the first in-channel resistance portion 8 and the second in-channel resistance portion 9 greatly affect the dispensing performance
- the in-channel resistance portions 8 and 9 Improving the dimensional accuracy of is directly linked to the dispensing accuracy, and by using the soft lithography technique, the quality of the manufactured dispensing apparatus or microfluidic device can be made extremely good.
- the configuration of the microfluidic device uses a glass substrate as the material of the bottom plate (base) 11, a silicone resin as the material of the channel-forming substrate 12, and a double-sided tape as the adhesive member 10, but these Materials and the like may be appropriately selected, and other materials may be substituted.
- the reaction container 7 is illustrated as a dome shape for convenience of explanation, this shape and structure can also be changed as appropriate.
- This dispensing device 300 has a form in which a plurality of branched channels 5a, 5b, . . .
- the discharge channels 4 are arranged on both sides, respectively, and the individual branch channels 5a, 5c, . . . . . 5j adjacent to each other in the state of being arranged on the side of .
- the branch flow path 5b of the second stage can be branched at an intermediate position between the branch flow paths 5a and 5c branching in the same direction. Therefore, as shown in the figure, the length of the main flow path 3 (the length of the portion where the branch flow path 5 is provided) is doubled without significantly changing the length of the branch flow path 5 formed only on one side.
- a number of branch channels 5 can be provided.
- the main channel 3 and the discharge channel 4 are concentrically formed into two types of circular arcs with different diameters, and a branch channel 5 is formed between them. may be placed. Also in such a form, the fluid supplied to the main channel 3 can be distributed to the individual branch channels 5 and flow down to the confluence position of the common discharge channel 4 .
- the distance (flow path length) between the adjacent first flow path internal resistance portions 8 in the main flow path 3 is shortened, and the flow path resistance between them is reduced. It is preferable to arrange them on the side, but it is also possible to switch the positions of the main flow path 3 and the discharge path 4 .
- the pipetting apparatus 400 as a whole fits in a circular shape with a predetermined diameter. Therefore, as shown in FIG.
- the chamber region 6 in the filled state (during the reaction test) is arranged concentrically from the center point. It can be carried out.
- the light ray RY emitted by the light source LT is emitted radially and irradiates the surface of the microfluidic device 1 in a circular shape, if the entire pipetting apparatus 400 is arranged within the circular irradiation area, Since there is no irradiation of light with different characteristics from a plurality of light sources and the intensity of the irradiated light is substantially uniform, it is possible to clearly confirm the degree of change in color such as hue. Further, the same effect can be expected even if the light source LT is a ring-shaped illumination device.
- a ring-shaped illumination device may be a device in which LEDs of the same output are arranged in a circle.
- a test chip can be configured by previously fixing a reagent to a reaction vessel provided in the chamber region. be. In this case, by fixing different reagents to a plurality of reaction containers and dispensing a single test sample to be tested, a plurality of tests can be performed simultaneously. According to this type of test chip, it is possible to easily obtain test results simply by observing which reagent reacts.
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Abstract
Description
図1は、マイクロ流路デバイスの実施形態を示すものである。なお、図1(a)は概略を示す斜視図であり、図1(b)はB-B線による断面図である。これらの図に示されるように、マイクロ流路デバイス1は、マイクロ流路チップ内に複数のマイクロ流路が設けられた構成である。マイクロ流路は、一般に0.005~2.0mm2程度の流路断面積を有する流路であり、マイクロ流体(1~500マイクロリットル程度の微小な液状流体)を送液するためのものを示す。
ここで、分注装置について詳述する。図2は、分注装置100の中心的構成について流路を中心に図示したものである。なお、流路部分のうち網掛で表示している領域は流体であることを示している(以下、同じ。)。この図に示されるように、主流路3に対し、複数の分岐流路5a,5b・・・は、分岐位置31,32・・・において分岐されるように設けられている。本実施形態では、各流路構成は、断面矩形としたものを例示しており、両側に対向する平行な二つの壁面と相互に平行な底面および上面によって構成されている。主流路3と分岐流路5a,5b・・・は、いずれも同じ流路断面積となるように、流路幅Wおよび流路深さHを同じに構成している。
上記のような基本的構成により、主流路3に供給される流体は、分岐流路5に分注された後、さらに主流路3を流下するのであるが、これを可能にするための条件について説明する。図3~図6に、4つの分岐流路5a~5dが主流路3から分岐している状態の流路を示す。図3は、1番目の分岐流路5aに分注される状態を示し、図4は、当該1番目の分岐流路5aに流体が充填された状態を示し、また、図5は、2番目の分岐流路5bまで流体が充填された状態を示し、さらに、図6は、3番目の分岐流路5cまで流体が充填された状態を示している。
上記に示した実施形態において、前述のとおり、多数の分岐流路5a,5b,・・・に対して分注を可能にするためには、第2流路内抵抗部9a1,9b1,9b2,・・・による決壊圧力P3が重要となる。そこで、この第2流路内抵抗部9a1,9b1,9b2,・・・による決壊圧力P3を所定の値とするため、個々の第2流路内抵抗部9a1,9b1,9b2,・・・を複数の縮小断面構成部によって形成するものとすることができる。
上記のように作製した流体分注装置200を使用し、分注実験を行った。なお、流路を構成する樹脂はシリコーン樹脂とし、ガラス基板との接着のための接着用部材としては、日東電工株式会社製の両面テープNo.5303Wを使用した。分注させる流体としては水を使用し、流量を50μL/minに維持しつつ注入部13から供給した。その結果、5つの分岐流路5a~5e(チャンバ領域部6a~6eを含む)のそれぞれに分注され、いずれの第2流路内抵抗部9a1~9e2においても決壊することはなかった。
以上のとおり、分注装置に係る上記実施形態および変形例によれば、主流路3に供給された流体は、上流側において分岐される分岐流路5から順次分注することが可能であり、複数の反応試験等を同時に行う場合において、同一の供給流体を個別の反応容器に個別に分注し、反応容器ごとに異なる検査を行うことが可能となるものである。
本発明の実施形態および実施例は上記のとおりであるが、上記各構成は本発明の一例を示すものであって、本発明がこれらの実施形態等に限定されるものではない。従って、上記以外の構成に変形することは可能である。例えば、マイクロ流路デバイスにおける構成は、底板(基部)11の素材としてガラス基板、流路構成基板12の素材としてシリコーン樹脂、および接着用部材10として両面テープを用いることを例示したが、これらの素材等については適宜なものを選択すればよいものであり、他のものに代替することができる。また、反応容器7は、説明の都合上ドーム型として例示したが、この形状および構造についても適宜変更可能である。
2 送液部
3 主流路
4 排出路
5,5a,5b,5c,5d,5e,5i,5j 分岐流路
6,6a,6b,6c,6d,6e,6i,6j チャンバ領域部
7 反応容器
8,8a,8b,8c,8d,8e,8i,8j 第1流路内抵抗部
9,9a1,9a2,9b1,9b2,9c1,9c2,9d1,9d2,9e1,9e2,9i1,9i2,9j1,9j2 第2流路内抵抗部
10 接着用部材
11 底板(基部)
12 流路構成基板
13 注入部
14,15 排出口
31,32,33,34 分岐位置
40,41,42,43,44,45 合流位置
91a1,92a1,93a1,94a1 縮小断面構成部
100,200,300,400 分注装置
Claims (16)
- 一方向に流体を流下させる主流路と、該主流路から分岐する複数の分岐流路と、該分岐流路が各末端において合流する共通の排出路とを備え、前記主流路を流下する流体を該主流路の上流側から分岐流路に順次分流させるマイクロ流路における流体分注装置であって、
前記主流路は、前記各分岐流路が形成される各分岐位置の近傍における該分岐位置よりも下流側にそれぞれ設けられた第1流路内抵抗部を備え、
前記各分岐流路は、前記主流路における各分岐位置から前記排出路における各合流位置までの間において流路断面積を拡大させたチャンバ領域部を備え、
前記排出路は、前記各分岐流路が合流する各合流位置の近傍において、該合流位置を起点として隣接する分岐流路の合流位置の側にそれぞれ設けられた第2流路内抵抗部を備え、
前記第1流路内抵抗部および前記第2流路内抵抗部は、それぞれの流路断面積を縮小させ、供給される流体の表面張力による流下を一時的に阻害するものであって、前記第1流路内抵抗部による流下の一時的阻害から開放するための第1の決壊圧力は、流体が前記分岐位置から前記第2流路内抵抗部に到達するまでの流路抵抗により生ずる圧力よりも大きくなるように、かつ、前記第2流路内抵抗部による流下の一時的阻害から開放するための第2の決壊圧力は、前記第1の決壊圧力ならびに流体が前記第1流路内抵抗部から次順位の第1流路内抵抗部に到達するまでおよび次順位の分岐位置から次順位の第2流路内抵抗部に到達するまでの各流路抵抗により生ずる圧力の総和よりも大きくなるように、個々の流路断面積が調整されていることを特徴とする流体分注装置。 - 前記第1流路内抵抗部および前記第2流路内抵抗部は、それぞれの流路を幅方向にのみ収縮させることにより流路断面積を縮小させ、供給される流体の表面張力による流下を一時的に阻害するものである請求項1に記載の流体分注装置。
- 前記第1流路内抵抗部および前記第2流路内抵抗部は、流路内側壁の片方または双方の側壁から対向する側壁に向かって膨出させて形成された突起部、または流路内に付設された障害部によって構成されるものである請求項2に記載の流体分注装置。
- 前記第1流路内抵抗部および前記第2流路内抵抗部は、前記突起部または前記障害部の端面と、この端面に対向する流路内側壁との間隙、または前記突起部が前記流路内側壁の双方から膨出させるときの両端面の間隙を調整することにより所望の流路断面積とするものである請求項3に記載の流体分注装置。
- 前記主流路および前記排出路は、それぞれ対向する壁面を有する断面矩形に形成されており、前記第1流路内抵抗部および前記第2流路内抵抗部の流路断面は、前記突起部または前記障害部の端面を流路内側壁に平行に設けて矩形に形成されるものである請求項4に記載の流体分注装置。
- 前記第2流路内抵抗部は、複数の縮小断面構成部によって構成されている請求項1~5に記載の流体分注装置。
- 前記分岐流路は、前記主流路を中心として両側に交互に分岐されるものである請求項1~5のいずれかに記載の流体分注装置。
- 前記主流路および前記排出路は、流下方向を同心の弧状に形成されており、前記分岐流路は、前記主流路および前記排出路の間を放射状に配置されるものである請求項1~5のいずれかに記載の流体分注装置。
- マイクロ流路チップ内に請求項1~5のいずれかに記載した流体分注装置を構成する複数のマイクロ流路を備えるマイクロ流路デバイスであって、
前記流体分注装置を構成する主流路、分岐流路および排出路と、該主流路に対し流体を供給する送液部と、該送液部に流体を注入する流体注入部と、前記分岐流路に形成されるチャンバ領域部に設けられる反応容器と、前記主流路の末端および前記分岐流路の末端のそれぞれに連続して形成され、該末端において開口されている排出口とを備えることを特徴とするマイクロ流路デバイス。 - 前記第2流路内抵抗部は、複数の縮小断面構成部によって構成されている請求項9に記載のマイクロ流路デバイス。
- 前記分岐流路は、前記主流路を中心として両側に交互に分岐されるものである請求項9に記載のマイクロ流路デバイス。
- 前記主流路および前記排出路は、流下方向を同心の弧状に形成されており、前記分岐流路は、前記主流路および前記排出路の間を放射状に配置されるものである請求項9に記載のマイクロ流路デバイス。
- マイクロ流路チップ内に請求項1~5のいずれかに記載した流体分注装置を構成する複数のマイクロ流路を備える検査チップであって、
前記流体分注装置を構成する主流路、分岐流路および排出路と、該主流路に対し流体を供給する送液部と、該送液部に流体を注入する流体注入部と、前記分岐流路に形成されるチャンバ領域部に設けられる反応容器と、前記主流路の末端および前記分岐流路の末端のそれぞれに連続して形成され、該末端において開口されている排出口とを備え、
前記反応容器に試薬が固定されていることを特徴とする検査チップ。 - 前記第2流路内抵抗部は、複数の縮小断面構成部によって構成されている請求項13に記載の検査チップ。
- 前記分岐流路は、前記主流路を中心として両側に交互に分岐されるものである請求項13に記載の検査チップ。
- 前記主流路および前記排出路は、流下方向を同心の弧状に形成されており、前記分岐流路は、前記主流路および前記排出路の間を放射状に配置されるものである請求項13に記載の検査チップ。
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