WO2024252105A1 - Dispositif de maintien d'une cartouche microfluidique - Google Patents
Dispositif de maintien d'une cartouche microfluidique Download PDFInfo
- Publication number
- WO2024252105A1 WO2024252105A1 PCT/FR2024/050740 FR2024050740W WO2024252105A1 WO 2024252105 A1 WO2024252105 A1 WO 2024252105A1 FR 2024050740 W FR2024050740 W FR 2024050740W WO 2024252105 A1 WO2024252105 A1 WO 2024252105A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- microfluidic cartridge
- base
- cover
- orifice
- arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L9/00—Supporting devices; Holding devices
- B01L9/52—Supports specially adapted for flat sample carriers, e.g. for plates, slides, chips
- B01L9/527—Supports specially adapted for flat sample carriers, e.g. for plates, slides, chips for microfluidic devices, e.g. used for lab-on-a-chip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/02—Adapting objects or devices to another
- B01L2200/025—Align devices or objects to ensure defined positions relative to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/02—Adapting objects or devices to another
- B01L2200/026—Fluid interfacing between devices or objects, e.g. connectors, inlet details
- B01L2200/027—Fluid interfacing between devices or objects, e.g. connectors, inlet details for microfluidic devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/04—Closures and closing means
- B01L2300/041—Connecting closures to device or container
- B01L2300/043—Hinged closures
Definitions
- the field of the invention relates to the maintenance of a microfluidic cartridge, in particular for the purposes of analyzing a sample of biological fluid.
- Microfluidics refers to the technology of systems whose operation is based on the flow of fluids - and in particular liquids - within channels with dimensions of the order of micrometers (pm). Such channels are commonly referred to as microchannels.
- microfluidics exploits certain physical phenomena, such as capillarity, laminarity or wettability, which occur when the liquid is in contact with a microchannel.
- the behavior of a liquid is also characterized by the speed of thermal exchanges and the exacerbation of electrokinetic effects.
- microfluidics has contributed to the development of several innovations, such as the insertion of active substances into microdroplets encapsulated in an evanescent membrane for cosmetic purposes, the manufacture of inkjet print heads or the design of micropumps for the injection of drugs into the human body.
- lab-on-a-chip better known by the English acronym LOC for "lab-on-a-chip"
- LOC for "lab-on-a-chip”
- Such labs-on-a-chip are used to perform biological analyses on small volume samples and allow, among other things, to replace bulky devices, to implement a large number of analyses in parallel and to reduce the time required for experiments or tests.
- a lab-on-a-chip typically takes the form of a microfluidic cartridge – also called a “microfluidic chip” in the English literature.
- a microfluidic cartridge In the context of a biological analysis, a microfluidic cartridge must be held still in order to accurately introduce the sample of biological fluid to be analyzed, for example a blood or urine sample, and the reagents. Once the microfluidic cartridge is positioned and held, it is then possible to carry out the necessary mixtures - generally one or more dilutions - for the biological analysis. To do this, it is known to use a holding device, sometimes called a "chip holder".
- Chinese utility model CN 208288057 U describes a device comprising a base on which a microfluidic cartridge can be arranged and a cover hinged to the base by means of a hinge so as to be able to be folded down onto the microfluidic cartridge.
- a screw provided with a damping spring and surmounted by a locking nut is rotatably mounted on the base and is arranged to be received in a bayonet of the cover to lock the latter in the closed position.
- US patent application US 2016/0367993 A1 relates to a holding apparatus comprising a lower part capable of receiving a microfluidic device and an upper part rotatably mounted on the lower part.
- the upper part comprises a coupler provided with flexible plugs, and a cover is interposed between the coupler and the lower part.
- the flexible plugs are arranged, when the holding apparatus is in the closed position, to bear on the cover and protrude from the upper part so as to form injection and sampling channels connected to the microfluidic device.
- European patent EP 2 694 214 B1 proposes a device for the sealed connection and disconnection of a microfluidic card.
- the device has a first surface intended to receive a microfluidic card and a second surface, parallel to the first surface, against which the microfluidic card is held in abutment. Such a support is ensured by walls perpendicular to the first and second surfaces as well as by holding means such as a cylindrical spring-loaded ball stop.
- the second surface has channels positioned so as to be connected to the fluid channels of the microfluidic card.
- the present invention improves the situation.
- the invention relates to a device for holding a microfluidic cartridge, comprising:
- a cover having an orifice and connected to the base by a pivot connection, which pivot connection allows the cover to pivot to reach a closed position in which, when a microfluidic cartridge is supported by the base, the orifice is opposite a fluid inlet of the microfluidic cartridge.
- the device is characterized in that it further comprises a rinsing system arranged to selectively connect the orifice to a reservoir in order to rinse a microfluidic cartridge supported by the base.
- the flushing system includes an arm having a nozzle adapted to be connected to a reservoir and to deliver a liquid stored in the reservoir, and the arm is connected to the base by a pivot connection, which pivot link allows the arm to pivot to reach a position where the tip is received in the hole.
- the arm is further provided with a reservoir capable of containing a liquid and a conduit connecting the reservoir to the tip.
- the cover has an opening and the arm has an elastic end capable of being fitted by deformation into the opening and of being held there by mechanical stress when the tip is received in the orifice.
- the base has a shoulder capable of serving as a support for the arm when the latter pivots beyond a vertical position.
- the base is provided with stops together defining a location within which a microfluidic cartridge can be positioned.
- the port is a female Luer-Lock type fitting.
- the base comprises a fixed portion arranged to support a microfluidic cartridge and a portion movable in translation in a direction substantially orthogonal to the fixed portion, and the movable portion is provided with the pivot connection by which the cover is connected to the base.
- the device further comprises a locking mechanism arranged to releasably lock the cover in the closed position on the base.
- the locking mechanism comprises for example at least one pair of a through hole and a complementary hole provided respectively in the cover and the base such that, when the cover is in the closed position, the through hole and the complementary hole are opposite each other to receive together a fixing screw.
- the locking mechanism may comprise a lever closure and a counter-hook mounted respectively on the base and the cover, or vice versa.
- the base is provided with a plurality of pneumatic connectors arranged to be coupled to a microfluidic cartridge supported by the base.
- the cover is provided with a plurality of fluidic connectors arranged to be coupled to a microfluidic cartridge supported by the base.
- the cover has a viewport.
- the invention also relates to a method of using the device as described above comprising:
- FIG. 1 illustrates a perspective view from above of a device for holding a microfluidic cartridge comprising a base, a cover and a rinsing system according to the invention in a configuration where the cover is in the open position,
- FIG. 2 illustrates an exploded view of a microfluidic cartridge
- FIG. 3 illustrates a perspective view from below of the device of [Fig. 1] in a configuration where the cover is in the open position
- FIG. 4 illustrates a cross-sectional view of the device of [Fig. 1] in a configuration where the cover is in the closed position and a liquid injection instrument is used
- FIG. 5 illustrates a sectional view of the device of [Fig. 1] in a configuration where the cover is in the closed position
- FIG. 6 illustrates a cross-sectional view of the device of [Fig. 1], and more particularly a problem related to the thickness of the microfluidic cartridge which may arise when closing the cover,
- FIG. 7 illustrates a top perspective view of the device of [Fig. 1] in a configuration where the cover is in the closed position
- FIG. 8 illustrates a sectional view of the device of [Fig. 1] in a configuration where the cover is in the closed position and the flushing system is used
- FIG. 9 illustrates a method of using the device of [Fig. 1] according to the invention
- FIG. 10 illustrates a perspective view from above of a device for holding a microfluidic cartridge comprising a rinsing system other than that of the invention
- FIG. 11 illustrates a sectional view of the flushing system of the device of [Fig. 10],
- FIG. 1 illustrates a device 1 for holding a microfluidic cartridge.
- a microfluidic cartridge typically refers to a lab-on-a-chip - or LOC - comprising a network of microchannels and reaction chambers.
- a microfluidic cartridge can be used to perform analyses on a sample of biological fluid, for example a blood or urine sample.
- the advantage of a microfluidic cartridge is to be able to handle small volume samples, but also to perform several analyses in parallel and more quickly.
- [Fig. 2] illustrates the classic structure of a microfluidic cartridge 3.
- the microfluidic cartridge 3 comprises a fluidic card 5, a pneumatic card 7, a membrane 9 and a lower card 11.
- the fluidic card 5 has a fluidic inlet 13 for the introduction - for example by injection or aspiration - of a sample of biological fluid to be analyzed and inlet/outlet ports 15 for the introduction of reagents or the evacuation of waste. Furthermore, the fluidic card 5 comprises a network of microchannels equipped with valves to allow the sample of biological fluid and the reagents to circulate as well as reaction chambers within which mixtures can be produced.
- the pneumatic card 7 is arranged to control the circulation of liquids within the microfluidic cartridge 3, and more particularly to control the fluidic card 5. To do this, the pneumatic card 7 comprises pneumatic channels to actuate the opening and closing of the valves of the fluidic card 5 by targeted pressure variations.
- the membrane 9 is intended to be interposed between the fluidic card 5 and the pneumatic card 7 so as to form a sandwich structure.
- the membrane 9 is elastic - or even hyperelastic - so as to be able to be deformed by the pressure induced by the pneumatic channels of the pneumatic card 7.
- any liquid present in the microfluidic cartridge 3 is caught between a fixed wall defined by the fluidic card 5 and a deformable wall defined by the membrane 9.
- the lower card 11 is arranged to close the pneumatic channels of the pneumatic card 7 and thus offer external controls 17 to control the fluidic card 5.
- a microfluidic cartridge 3 is positioned on the device 1, for example for the purpose of analyzing a sample of biological fluid.
- the microfluidic cartridge 3 shown in this figure may be similar to or different from that shown in [Fig. 2],
- the device 1 comprises a base 19, a cover 21 and a rinsing system 23.
- the base 19 generally forms a support for the device 1. When in use, the device 1 can thus rest on the base 19.
- the base 19 is arranged to support a microfluidic cartridge 3.
- the base 19 may be provided with stops 25 together delimiting a location intended for the microfluidic cartridge 3.
- the base 19 has the general shape of a plate having a rectangular upper surface on which the microfluidic cartridge 3 rests, and the stops 25 are arranged at the periphery of this upper surface.
- At least one stop 25 has an elastic portion 26, which allows the device 1 to be able to adapt to microfluidic cartridges of different dimensions, but also to improve the maintenance of the microfluidic cartridge 3 by taking advantage of the restoring force exerted by the elastic portion 26.
- several stops 25 can have such an elastic portion 26.
- the base 19 is provided with three stops 25 and two of them have an elastic portion 26.
- the base 19 can be provided with several pneumatic connectors 27 each arranged to be coupled to the microfluidic cartridge 3 supported by the base 19.
- Such pneumatic connectors 27 make it possible to induce targeted pressure variations within the microfluidic cartridge 3 to control the flow of liquids, in particular the biological liquid sample or the reagents.
- each pneumatic connector 27 is connected to an external control 17 for controlling the fluidic card 5 via the pneumatic channels of the pneumatic card 7.
- the base 19 can be provided with a heating system (not shown here) which makes it possible to control the temperature of the microfluidic cartridge 3, which can be important for carrying out a biological analysis.
- the cover 21 has an orifice 29 and is rotatably mounted on the base 19 by means of a pivot connection 31.
- the pivot link 31 allows the cover 21 to pivot about a Y axis to move between an open position and a closed position.
- the closed position is an equilibrium position of the cover 21 in which the latter is folded down onto the base 19 or, where appropriate, onto the microfluidic cartridge 3 arranged on the base 19.
- the cover 21 must be in the closed position to keep the microfluidic cartridge 3 stationary.
- the open position is a position of the cover 21 allowing the microfluidic cartridge 3 to be placed on the base 19 or removed.
- the cover 21 is in the open position and thus allows an operator to directly access the microfluidic cartridge 3, for example to remove it after a biological analysis.
- the orifice 29 is a through hole and is positioned on the cover 21 such that, when the cover 21 is folded into the closed position on the microfluidic cartridge 3, the orifice 29 is opposite a fluid inlet 13 of the microfluidic cartridge 3.
- the orifice 29 is opposite the fluidic inlet 13 of the fluidic card 5.
- the orifice 29 allows, when the cover 21 is in the closed position, access to the fluidic inlet 13 of the microfluidic cartridge 3 and therefore to introduce a sample of biological liquid to be analyzed.
- the orifice 29 is a female Luer-Lock type connector.
- Luer-Lock type connectors are usually used to improve the assembly of syringes: the tip of the syringe barrel is thus provided of a male connector while the needle is equipped with a female connector.
- the male and female connectors each have a conical shape, and more precisely a conicity of approximately 6%. Furthermore, the male connector has an external thread while the female connector has an internal thread. The male and female connectors can be screwed together to obtain a tight connection between the barrel and the needle of the syringe.
- the port 29 is a female Luer-Lock type connector, it is thus possible to easily couple a liquid injection instrument provided with a male Luer-Lock type connector and the fluid inlet 13 via the port 29.
- the orifice 29 may take the form of any connector allowing a sealed connection between the device 1 and the injection instrument.
- the orifice 29 may be a Luer Simple, quarter-turn, bayonet or screw connector.
- the injection instrument used is provided with an additional connector.
- FIG. 4 shows a sectional view of the device 1 in which the cover 21 is in the closed position.
- the microfluidic cartridge 3 is thus held between the base 19 and the cover 21.
- FIG. 4 also shows an injection instrument assembled with the device 1 for injecting a sample of biological fluid into the fluid inlet 13 via the orifice 29.
- the injection instrument comprises a sampling body 33 - of which only the lower part is shown here - terminated by an adapter 35 taking the form of a male Luer-Lock type connector within which a sleeve 37 is housed.
- an adapter 35 taking the form of a male Luer-Lock type connector within which a sleeve 37 is housed.
- a tube (not shown here) is present in the sampling body 33, which tube contains the sample of biological fluid to be analyzed.
- the adapter 35 and the orifice 29 have complementary shapes - a conicity of approximately 6% - to obtain a sealed connection between the injection instrument and the fluid inlet 13.
- the sealing can be further improved with an O-ring 39 provided at the orifice 29, and more precisely at the outlet of the orifice 29 intended to be connected to the fluid inlet 13.
- an O-ring 39 makes it possible to prevent any leakage when introducing a sample of biological liquid into the microfluidic cartridge 3.
- the cover 21 may be provided with a plurality of fluidic connectors 41 each arranged to be coupled to the microfluidic cartridge 3 supported by the base 19.
- the fluidic connectors 41 are positioned on the cover 21 such that, when the cover 21 is folded into the closed position on the microfluidic cartridge 3, the fluidic connectors 41 are each opposite an inlet/outlet port of the microfluidic cartridge 3.
- the fluidic connections 41 allow, when the cover 21 is in the closed position, access to the inlet/outlet ports of the microfluidic cartridge 3 and therefore to introduce reagents or to evacuate waste.
- each fluidic connector 41 is connected to an inlet/outlet port 15 of the fluidic card 5.
- FIG. 5 shows a sectional view of the device 1 in which the cover 21 is in the closed position.
- the microfluidic cartridge 3 is thus held between the base 19 and the cover 21.
- FIG. 5 allows to see in more detail the fluidic connections 41 which take the form of cylindrical tubes each partially housed in a through hole. Such tubes are for example microtubes.
- the microfluidic cartridge 3 has a structure similar to that illustrated in [Fig. 2] and the fluidic connections 41 are each connected to an inlet/outlet port 15.
- FIG. 5 also illustrates a particularly advantageous embodiment of the manner in which the base 19 and the cover 21 are hinged to each other. As mentioned above, the cover 21 is connected to the base 19 by a Y-axis pivot connection 31. However, the thickness may vary from one microfluidic cartridge 3 to another to the point that it may be impossible to completely fold the cover 21 onto the fluid cartridge 3.
- the base 19 from a fixed portion 43 and a movable portion 45.
- the fixed portion 43 is the part of the base 19 arranged to support the microfluidic cartridge 3 while the movable portion 45 is the part of the base 19 carrying the pivot connection 31 by which the cover 31 is connected to the base 19.
- the movable portion 45 is mounted in translation on the fixed portion 43 in a direction Z substantially orthogonal to the fixed portion 43.
- Such an embodiment makes it possible to adjust the height of the pivot connection 31 relative to the base 19 and thus to adapt to the thickness of the microfluidic cartridge 3.
- the cover 21 may also have a sight glass 47.
- a sight glass 47 allows an operator, when the cover 21 is in the closed position, to see the microfluidic cartridge 3. It is indeed common for the microfluidic cartridge 3 to be transparent to give visual feedback to the operator during the analysis of the biological fluid sample. Thus, the sight glass 47 is particularly useful for verifying that the operation of the microfluidic cartridge 3 complies with the wishes of the operator who, for example by means of the pneumatic connectors 27, controls the flow of liquids - in particular the biological liquid sample and the reagents - within the microfluidic cartridge 3.
- the fluidic card 5 is thus generally transparent to be able to observe the network of microchannels and the reaction chambers. The operator can ensure that the actuation of the valves of the fluidic card 5, carried out via the pneumatic card 7, is as expected.
- the inspection window 47 makes such monitoring possible even when the microfluidic cartridge 3 is held by the device 1.
- the device 1 may comprise a locking mechanism arranged to detachably lock the cover 21 in the closed position on the base 19.
- such a locking mechanism comprises at least one pair of a through hole and a complementary hole provided in the cover 21 and the base 19 respectively.
- the through hole and the complementary hole are positioned such that, when the cover 21 is in the closed position, the through hole and the complementary hole face each other to receive together a fixing screw.
- the complementary hole may be a through hole or a blind hole.
- the locking mechanism comprises a first pair of a through hole 49 and a complementary hole 51 and a second pair of a through hole 53 and a complementary hole 55.
- the locking of the cover 21 in the closed position is illustrated in [Fig. 7].
- the cover 21 is folded over the microfluidic cartridge 3 and is locked onto the base 19. More particularly, the cover 21 is screwed onto the base 19 by means of a first fixing screw 57 and a second fixing screw 59.
- the first fixing screw 57 has a threaded rod complementary to the respective internal threads - obtained by tapping - of the through hole 49 and the complementary hole 51
- the second fixing screw 59 has a threaded rod complementary to the respective internal threads - also obtained by tapping - of the through hole 53 and the complementary hole 55.
- the locking mechanism may comprise a lever latch - also called a mechanical latch or industrial latch - and a counter-hook mounted respectively on the base 19 and the cover 21.
- the lever latch may be mounted on the cover 21 while the counter-hook is mounted on the base 19.
- a lever latch is generally formed of a base which may be riveted, screwed or welded, a handle and a movable hook.
- FIG. 7 in which the cover 21 is in the closed position, also shows in detail the rinsing system 23.
- the device 1 has the particularity of having the necessary means - namely an integrated rinsing system 23 - for rinsing a microfluidic cartridge 3, in particular after the analysis of a sample of biological fluid. Consequently, it is not necessary to use a disposable microfluidic cartridge 3 and, moreover, the microfluidic cartridge 3 can be rinsed while remaining held between the base 19 and the cover 21, therefore without having to be removed from the device 1.
- the rinsing system 23 is arranged to selectively connect the orifice 29 to a reservoir (not shown here) in order to rinse the microfluidic cartridge 3 supported by the base 19.
- the orifice 29 has a dual use when the cover 21 is folded down into the closed position on the microfluidic cartridge 3: it allows, on the one hand, to introduce a sample of biological liquid into the fluidic inlet 13 and, on the other hand, to rinse the microfluidic cartridge 3 by means of the system of rinsing 23; these two operations can be carried out while maintaining the microfluidic cartridge 3.
- the rinsing system 23 comprises for example an arm 61 provided with an end piece 63.
- the arm 61 is rotatably mounted on the base 19 by means of a pivot connection 65.
- the pivot connection 65 allows the arm 61 to pivot about an axis to reach a position in which the tip 63 is received in the orifice 29.
- the axis of the pivot link 65 - that is to say the axis of rotation of the arm 61 - is the Y axis, that is to say the same axis as that of the pivot link 31.
- the axis of the pivot link 65 may be distinct from the Y axis. In other configurations, the axis of the pivot link 65 may thus be parallel or orthogonal to the Y axis.
- the tip 63 is capable of being connected to a reservoir and of delivering a liquid stored therein.
- the reservoir is typically a storage reservoir for a rinsing liquid and that such a rinsing liquid is intended to be introduced into the microfluidic cartridge 3 to evacuate in the form of waste the liquids involved in the biological analysis carried out, whether it be the sample of biological liquid or the reagents.
- Such a reservoir may be external to the device 1, in which case the operator must connect the reservoir to the end piece 63.
- the arm 61 may be provided with a reservoir, in which case the arm 61 also comprises a conduit connecting the reservoir to the end piece 63. In the latter case, the reservoir may be housed in the arm 61.
- the base 19 has a shoulder (not shown here) capable of serving as a support for the arm 61 when the latter pivots beyond a vertical position.
- Such a shoulder makes it possible to maintain the arm 61 in a stable position when the rinsing system 23 is not in use, in particular when introducing a sample of biological liquid into the microfluidic cartridge 3 via the orifice 29 or during biological analysis.
- the shoulder may take the form of a recess of the base 19 extending outwardly of the device 1. An operator may swing the arm 61 beyond the vertical position - i.e. a position in which the arm 61 and the base 19 form an angle substantially equal to 90° - to leave the arm 61 resting on the shoulder.
- the cover 21 has an opening 67 and the arm 61 has a resilient end 69.
- the opening 67 and the resilient end 69 are involved in locking the arm 61.
- FIG. 8 illustrates a sectional view of the device 1 in which the cover 21 is in the closed position and in which the arm 61 is locked onto the cover 21.
- the elastic end 69 is fitted by deformation into the opening 67 and is held there by mechanical stress.
- the elastic end 69 After fitting, the elastic end 69 is no longer compressed and therefore returns to its resting shape. In particular, the elastic end 69 has a resting shape that prevents it from being removed from the opening 67.
- This fitting sometimes also called “clipping" - is reversible: an operator can apply pressure to the elastic end 69 to deform it and then remove it from the opening 67.
- a position sensor (not shown here) can be integrated into the device 1 to ensure that the arm 61 is locked onto the cover 21.
- the elastic end 69 is for example made of plastic. However, those skilled in the art understand that any material capable of being deformed and of imparting elasticity to the end of the arm 61 can be used.
- FIG. 8 shows a conduit 71 which, as mentioned previously, makes it possible to connect the tip 63 to the reservoir containing the rinsing liquid used to rinse the microfluidic cartridge 3.
- the microfluidic cartridge 3 is placed on the base 19.
- the operator can pivot the cover 21 around the Y axis to keep it in the open position and thus have access to the base 19. Keeping the cover 21 in the open position is made easier when the base 19 has a shoulder as described above; it is then possible to tilt the cover 21 beyond a vertical position and let it rest on the shoulder provided for this purpose.
- the positioning of the microfluidic cartridge 3 can be facilitated by the presence of stops 25 which together delimit a location intended to accommodate the microfluidic cartridge 3.
- stops 25 can have an elastic portion 26 to be able to adapt to different dimensions of the microfluidic cartridge 3.
- the elastic portion(s) 26 also make it easier to position the microfluidic cartridge 3 and improve its retention.
- the cover 21 is folded over the microfluidic cartridge 3.
- the operator pivots the cover 21 around the Y axis to make it reach the closed position in which the orifice 29 is opposite the fluidic inlet 13 of the microfluidic cartridge 3.
- the cover 21 can be locked on the base 19 to improve the maintenance of the microfluidic cartridge 3.
- At least one fixing screw 57 (respectively 59) can be driven into a through hole 49 (respectively 53) and a complementary hole 51 (respectively 55) provided respectively in the cover 21 and the base 19 and which are opposite each other when the cover 21 is in the closed position. It is also possible to use a lever closure and a counter-hook mounted respectively on the base 19 and the cover 21, or vice versa.
- the sample of biological fluid to be analyzed is introduced into the microfluidic cartridge 3, and more precisely into the fluidic inlet 13, via the orifice 29.
- the sample of biological fluid to be analyzed is a sample of blood, urine, cerebrospinal fluid, pleural fluid or synovial fluid.
- the port 29 is a female Luer-Lock type connector since liquid injection instruments are, for the most part, provided with a male Luer-Lock type connector.
- the injection instrument shown is provided with an adapter 35 in the form of a male Luer-Lock type connector.
- Another advantage is that such a port 29 makes it possible to improve the seal, which can be reinforced by the presence of an O-ring 39.
- the port 29 can take the form of a connector other than a female Luer-Lock type connector.
- the introduction of the biological fluid sample is not necessarily carried out by injection, i.e. by jet or pressure using a suitable injection instrument.
- injection i.e. by jet or pressure using a suitable injection instrument.
- one or more analyses of the biological fluid sample are carried out with the microfluidic cartridge 3.
- Bio analyses are generally applied in the field of medical biology to determine the pathophysiological origin of a disease. Biological analyses can also contribute to the prevention, screening, diagnosis or assessment of the risk of the occurrence of pathological conditions, as well as to the determination or monitoring of the physiological or pathophysiological state of a patient.
- the biological analysis(s) to be carried out with the microfluidic cartridge 3 may involve mixing with reagents.
- these reagents may be introduced into the microfluidic cartridge 3 via the fluidic connectors 41.
- Reagents can be used, for example, to dilute the biological fluid sample.
- dilution is used to perform a complete blood count (often referred to as CBC) - also called a hemogram.
- CBC complete blood count
- a complete blood count is also referred to as a CBC. Due to the concentration of blood cells in a blood sample, namely leukocytes (or white blood cells), erythrocytes (or red blood cells) and thrombocytes (or platelets), prior dilution is preferable to facilitate cell counting and differentiation.
- the operator can control the microfluidic cartridge 3 held by the device 1.
- the underside of the base 19 gives the operator access to pneumatic connectors 27 which make it possible to control the circulation of liquids, in particular the sample of biological liquid and the reagents, by targeted pressure variations.
- the viewport 47 of the cover 21 also gives the operator visibility of the microfluidic cartridge 3. The operator can thus ensure that the biological analysis is taking place as planned and, if necessary, intervene using the pneumatic connectors 27.
- the biological fluid sample and the reagents circulate in a network of microchannels and reaction chambers of the fluidic card 5.
- the operator can rinse the microfluidic cartridge 3.
- the orifice 29 is connected to a tank storing a rinsing liquid by means of the rinsing system 23.
- the rinsing system 23 takes the form of an arm 61 provided with an end piece 63 and connected to the base 19 by a pivot connection 65.
- the arm 61 is folded down onto the cover 21 - still in the closed position - to reach a position in which the end piece 63 is received in the orifice 29.
- the arm 61 can be locked onto the cover 61 to prevent any disconnection between the end piece 63 and the orifice 29. To do this, the operator simply has to exert pressure on the elastic end 69 of the arm 61 to deform it and fit it into the opening 67.
- the microfluidic cartridge 3 is rinsed by introducing the rinsing liquid via the orifice 29.
- the rinsing liquid is typically a diluent - or rinsing diluent.
- the rinsing liquid can be introduced into the microfluidic cartridge 3 by injection or by aspiration.
- the rinsing system 23 passes the rinsing liquid from the reservoir to the microfluidic cartridge 3.
- the rinsing liquid is delivered by the tip 63 of the arm 61.
- the reservoir can be external to the device 1, in which case the operator must connect the tank to the tip 63, or be part of the arm 61, which then also includes a conduit 71 connecting the tank to the tip 63.
- the microfluidic cartridge 3 can be reused to carry out new analyses on another sample of biological fluid. It is not necessary to open the device 1 to replace the microfluidic cartridge 3; it can remain held between the base 19 and the cover 21.
- a device 73 for holding a microfluidic cartridge will now be described with reference to [Fig. 10] and [Fig. 11],
- Device 73 is not covered by the scope of the claims, although device 1 and device 73 share common elements.
- the device 73 having the function of maintaining a microfluidic cartridge such a microfluidic cartridge 3 is present in [Fig. 10] and typically has a structure similar to that illustrated in [Fig. 2],
- the device 73 has the particularity of comprising a needle 75, which is secured to the cover 21 and passes through the orifice 29.
- the needle 75 extends in a direction substantially orthogonal to the cover 21.
- the cover 21 is in the closed position and the needle 75 then extends substantially in the Z direction.
- the needle 75 opens onto the fluid inlet 13 of the microfluidic cartridge 3.
- Needle 75 is arranged to take a sample of biological fluid and guide it to the microfluidic cartridge 3.
- the O-ring 39 provided at the orifice 29 also makes it possible to improve the seal and to prevent any leakage when introducing a sample of biological liquid into the microfluidic cartridge 3 using the needle 75.
- the device 73 also has the particularity of comprising a rinsing system 77 different from the rinsing system 23.
- the rinsing system 77 does not cover the rinsing system 77.
- the rinsing system 77 does not comprise an arm provided with a tip capable of being connected to a reservoir and of delivering a liquid stored in this reservoir. Furthermore, the rinsing system 77 is arranged to rinse the needle 75, and not the microfluidic cartridge 3.
- the rinsing system 77 is formed by an elongated body 79 having a cavity 81, a conduit 83, a rinsing inlet 85 and a rinsing outlet 87.
- the cavity 81 extends along only a portion of the elongated body 79 and is intended to partially or completely accommodate a tube 89 closed by a plug 91.
- the elongated body 79 has an opening 93, which allows the tube 89 to be inserted into the cavity 81.
- the elongated body 79 has the shape of a cylinder of revolution and the opening 93 is circular.
- the conduit 83 extends along the remaining part of the elongate body 79, and therefore in the extension of the cavity 81.
- the cavity 81 and the conduit 83 communicate via an orifice 95.
- the conduit 83 receives the needle 75.
- the elongate body 79 has an orifice 97 - opposite the opening 93 - through which the needle 75 penetrates the elongate body 79.
- the rinsing inlet 85 opens onto the outside of the elongated body 79 and communicates with the conduit 83.
- the rinsing inlet 85 is arranged to be connected to a storage tank for a rinsing liquid.
- the rinsing outlet 87 opens onto the outside of the elongated body 79 and communicates with the conduit 83.
- the rinsing outlet 87 is arranged to evacuate the rinsing liquid from the elongated body 79.
- the flushing inlet 85 communicates with the flushing outlet 87 via the conduit 83 which connects them to each other in a fluidic manner.
- the rinsing system 77 and more precisely the elongated body 79, is mounted in translation on the cover 21 by means of at least one axis 99, which extends from the cover 21 in a direction substantially parallel to the needle 75.
- the axes 99 are arranged to allow the rinsing system 77 to slide along the needle 75 received within the conduit 83.
- the axes 99 are each provided with a spring (not referenced) whose return force allows the rinsing system 77 to return to a rest position.
- FIG. 1 1 shows two different positions of the rinsing system 77.
- Diagram (a) shows the rinsing system 77 in the rest position, while diagram (b) shows the rinsing system 77 in a sampling position.
- Diagram (a) and diagram (b) show how a sample of biological fluid, contained in the tube 89 closed by the stopper 91, can be taken by the needle 75 and introduced into the microfluidic cartridge 3 for analysis purposes.
- the rinsing system 77 is in the rest position and the tube 89 is partially housed in the cavity 81 such that the plug 91 is in contact with the orifice 95.
- the operator can then press on the tube 89, which causes a translation of the rinsing system 77 along the axes 99.
- the rinsing system 77 thus slides along the needle 75, which passes through the conduit 83, passes through the orifice 95, pierces the stopper 91 and penetrates the tube 89 to come into contact with the sample of biological fluid.
- the rinsing system 77 is in the sampling position, which is reached when the rinsing system 77 comes into contact with the cover 21 and cannot slide further along the needle 75.
- the sample of biological fluid contained in the tube 89 can then be collected by the needle 75 by aspiration.
- the sample of biological fluid is guided by the needle 75 along the conduit 83, passes through the orifice 97 then the orifice 29 and is finally introduced into the microfluidic cartridge 3 via the fluidic inlet 13.
- the rinsing system 77 returns to the rest position, either thanks to the operator who can slide the rinsing system 77 in the opposite direction, or thanks to the return force of the springs with which the axes 99 are possibly provided. The operator can then remove the tube 89.
- the configuration of the device 73 is then that of [Fig. 10].
- the 75 needle rinse can then be implemented.
- the rinsing inlet 85 is connected to the rinsing liquid storage tank.
- the rinsing liquid - which is typically a diluent - is sucked into the rinsing inlet 85, circulates along the conduit 83 where it comes into contact with the needle 75 received therein, and is finally discharged through the rinsing outlet 87.
- the circulation of the rinsing liquid from the rinsing inlet 85 to the rinsing outlet 87 is here facilitated by the fact that the rinsing inlet 85 is at a higher height than the rinsing outlet 87 relative to the cover 21. It is thus possible to rinse the outside, but also the inside, of the needle 75.
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24736485.4A EP4724207A1 (fr) | 2023-06-07 | 2024-06-06 | Dispositif de maintien d'une cartouche microfluidique |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2305712A FR3149522A1 (fr) | 2023-06-07 | 2023-06-07 | Dispositif de maintien d’une cartouche microfluidique |
| FRFR2305712 | 2023-06-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024252105A1 true WO2024252105A1 (fr) | 2024-12-12 |
Family
ID=88068943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2024/050740 Ceased WO2024252105A1 (fr) | 2023-06-07 | 2024-06-06 | Dispositif de maintien d'une cartouche microfluidique |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4724207A1 (fr) |
| FR (1) | FR3149522A1 (fr) |
| WO (1) | WO2024252105A1 (fr) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120270305A1 (en) * | 2011-01-10 | 2012-10-25 | Illumina Inc. | Systems, methods, and apparatuses to image a sample for biological or chemical analysis |
| US20130134040A1 (en) * | 2011-11-25 | 2013-05-30 | Tecan Trading Ag | Disposable cartridge for microfluidics system |
| US20160367993A1 (en) | 2015-06-16 | 2016-12-22 | Abnova (Taiwan) Corporation | Holding apparatus of a microfluidic device |
| GB2547753A (en) * | 2015-12-28 | 2017-08-30 | Ibm | Operation of diagnostic devices involving microchannels and electrodes |
| EP2694214B1 (fr) | 2011-04-08 | 2018-08-01 | Commissariat à l'Énergie Atomique et aux Énergies Alternatives | Dispositif de connexion d'une carte microfluidique |
| CN208288057U (zh) | 2018-04-19 | 2018-12-28 | 广州安方生物科技有限公司 | 一种微流控芯片夹具台 |
-
2023
- 2023-06-07 FR FR2305712A patent/FR3149522A1/fr active Pending
-
2024
- 2024-06-06 EP EP24736485.4A patent/EP4724207A1/fr active Pending
- 2024-06-06 WO PCT/FR2024/050740 patent/WO2024252105A1/fr not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120270305A1 (en) * | 2011-01-10 | 2012-10-25 | Illumina Inc. | Systems, methods, and apparatuses to image a sample for biological or chemical analysis |
| EP2694214B1 (fr) | 2011-04-08 | 2018-08-01 | Commissariat à l'Énergie Atomique et aux Énergies Alternatives | Dispositif de connexion d'une carte microfluidique |
| US20130134040A1 (en) * | 2011-11-25 | 2013-05-30 | Tecan Trading Ag | Disposable cartridge for microfluidics system |
| US20160367993A1 (en) | 2015-06-16 | 2016-12-22 | Abnova (Taiwan) Corporation | Holding apparatus of a microfluidic device |
| GB2547753A (en) * | 2015-12-28 | 2017-08-30 | Ibm | Operation of diagnostic devices involving microchannels and electrodes |
| CN208288057U (zh) | 2018-04-19 | 2018-12-28 | 广州安方生物科技有限公司 | 一种微流控芯片夹具台 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4724207A1 (fr) | 2026-04-15 |
| FR3149522A1 (fr) | 2024-12-13 |
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