Liquid path system, immunity analyzer and whole blood sample collection container

Abstract

The utility model relates to the technical field of whole blood sample analysis, in particular to a liquid path system, an immunity analyzer and a whole blood sample collecting container, and the liquid path system comprises an injector, a liquid inlet, a liquid outlet and a liquid outlet, the power source is connected with the injector; the power source is used for pushing the injector to suck and discharge; one end of the sampler is provided with a sampling port, the other end of the sampler is provided with a connecting port, and the connecting port is communicated with the injection port; the second collection container is loaded with a whole blood sample; a filtering assembly is arranged in the first collecting container, and a containing cavity suitable for containing the sampler is formed in the filtering assembly. A whole blood sample can be collected by automatically using an injector and a sampler through a power source, then the whole blood sample is completely transferred into a filtering assembly, and due to the fact that when a plunger of the injector is pushed, pressure can be formed among the injector, the sampler and a filtering device, and the pressure action can accelerate separation of plasma and blood cells.

Description

Technical Field

[0001] The utility model relates to the technical field of whole blood sample analysis, in particular to a liquid path system, an immunoassay analyzer and a collection container for whole blood samples. Background Art

[0002] At present, immunoassay devices on the market usually detect serum or plasma. In order to obtain serum or plasma samples, three methods are usually adopted:

[0003] The first is to centrifuge the whole blood sample in a centrifuge outside the analyzer in advance, and then test the centrifuged whole blood sample on the machine. This method is too cumbersome to operate and will affect work efficiency;

[0004] The second is to design a special centrifugation mechanism inside the analyzer, and directly aspirate and test the whole blood sample after centrifugation. Due to the large volume of the centrifugation mechanism and the relatively complex integration process, the cost of the integrated analyzer is high and the volume is large;

[0005] The third is not to use a centrifugation mechanism, but directly use the median or average value of the HCT of most people as a reference, roughly estimate the proportion of plasma and blood cells in the whole blood sample, and then process the measurement results to obtain the concentration value of the whole blood sample. The accuracy of the measurement results of this method will have a certain deviation because the proportion of plasma and blood cells in the whole blood samples of different patients is different. Content of the Utility Model

[0006] In view of this, the utility model provides a liquid path system, an immunoassay analyzer and a collection container for whole blood samples to solve the problems of complex operation, high cost or poor result accuracy when obtaining whole blood samples at present.

[0007] In the first aspect, the utility model provides a liquid path system, which includes:

[0008] A syringe provided with an injection port;

[0009] A power source connected to the syringe; the power source is used to push the syringe to aspirate and discharge;

[0010] A sampler, one end of the sampler is provided with a sampling port, the other end of the sampler is provided with a connection port, and the connection port is communicated with the injection port;

[0011] A second collection container loaded with whole blood samples;

[0012] A first collection container, inside which a filtering component is arranged, and an accommodation cavity suitable for placing the sampler is arranged in the filtering component;

[0013] The sampler is also used to move between the first collection container and the second collection container to discharge the whole blood sample aspirated from the second collection container into the first collection container. Among them, the blood cells in the whole blood sample are intercepted by the filtering component, and the plasma in the whole blood sample enters the first collection container.

[0014] Advantages: In the embodiment of the present invention, by setting the syringe and the sampler, the syringe and the sampler can be automatically used by the power source to collect the whole blood sample. After the collection is completed, the sampler can be placed into the filtering component, and then the syringe can be self-propelled by the power source to transfer all the whole blood sample inside the syringe to the filtering component. Since pressure will be formed among the syringe body, the sampler and the filtering device when the syringe plunger is pushed, the pressure effect will accelerate the separation of plasma and blood cells. By using a reusable sampler and the first collection container provided with a filtering component, the plasma in the whole blood sample can be separated for immunoassay without adding components to the liquid path system, which can simplify the operation and reduce the cost of whole blood immunoassay while ensuring the accuracy of immunoassay.

[0015] In an optional embodiment, the syringe includes:

[0016] An injection tube, one end of the injection tube is provided with an insertion port, and the other end of the injection tube is provided with the injection port;

[0017] An injection plunger, one end of the injection plunger is provided with an operation part, and the operation part is connected to the power source; the other end of the injection plunger is provided with a push plug; the push plug is driven by the power source to move in the injection tube.

[0018] In an optional embodiment, the power source is further used to drive the position of the push plug moving in the injection tube so that the filtering component is in a positive pressure state.

[0019] Advantages: Before sampling, the power source can be used to drive the push plug to aspirate a certain volume in advance. After sampling is completed and the sample is discharged into the filtering component, the power source can continue to push the push plug forward, so that the aspirated volume can be used to pressurize the whole blood sample in the filtering component, which can accelerate the separation of plasma and blood cells in the whole blood sample. Or, after the sample discharge is completed, the power source is used to operate the syringe to aspirate a certain volume, and then the power source continues to push the push plug forward, so that the aspirated volume can be used to pressurize the whole blood sample in the filtering component, which can accelerate the separation of plasma and blood cells in the whole blood sample and improve the sample processing efficiency.

[0020] In an alternative embodiment, when the plunger is squeezed to the first position of the syringe tube under the driving action of the power source, the whole blood sample collected in the sampler is emptied; when the plunger is continuously squeezed to the second position of the syringe tube, the filtering component is in a positive pressure state; the second position is farther from the injection port than the first position.

[0021] Advantageous effects: Before sampling, in the embodiment of the present utility model, the syringe is operated by the power source to aspirate a certain volume of air. After the whole blood sample is emptied, since the plunger has not reached the injection port, the power source drives the plunger to continue moving downward by an appropriate distance to reach the second position, that is, at a position close to or reaching the injection port. The volume of air aspirated can be used to keep the filtering component in a certain positive pressure state, thereby accelerating the separation of plasma and blood cells. Therefore, by setting the first position and the second position of the plunger, the separation of plasma and blood cells can be accelerated without adding additional components and the operation is simple and fast, saving the time for sample processing and improving the detection efficiency.

[0022] In an alternative embodiment, after the whole blood sample in the second collection container is drained into the first collection container, the power source is further used to drive the plunger to move upward to the third position and then move downward, so that the filtering component is in a positive pressure state; the position of the plunger when the whole blood sample is emptied is closer to the injection port than the third position.

[0023] Advantageous effects: After completely draining the whole blood sample, in the embodiment of the present utility model, the power source can drive the plunger to aspirate a certain volume of air by itself to reach the third position, and then the power source drives the plunger to continue moving downward to a position close to or reaching the injection port, which is closer to the syringe port than the third position. Therefore, the volume of air aspirated can be used to compress and keep the filtering component in a certain positive pressure state, thereby accelerating the separation of plasma and blood cells. Therefore, the efficiency of sample processing can be improved without adding additional components, and the operation is simple and fast.

[0024] In an alternative embodiment, the sampler includes:

[0025] A sampling needle, with a conical surface provided at one end close to the filtering component, and the conical surface fits with the opening of the filtering component to form a sealed interface.

[0026] Advantageous effects: By forming a sealed interface, in the embodiment of the present utility model, the sealing performance between the sampler and the filtering component can be improved, which is convenient for using the syringe to pressurize the whole blood sample in the filtering component, thereby improving the working efficiency.

[0027] In an alternative embodiment, an inverted conical groove adapted to the conical surface to be embedded is provided at the opening of the filtering component.

[0028] Beneficial Effects: By providing an inverted conical groove, the embodiment of the present invention ensures that the sampler can be stably fixed to the filter assembly after being placed on it, thereby minimizing the possibility of the sampler falling off the filter assembly and ensuring stable operation of the device. It also improves the sealing between the sampler and the filter assembly, facilitating the pressurization of the whole blood sample in the filter assembly using a syringe, thereby improving work efficiency.

[0029] In a second aspect, the present invention further provides an immunoassay analyzer, comprising: the fluid path system according to any one of the above embodiments, the immunoassay analyzer further comprising:

[0030] a gripper for removing the filter assembly from the first collection container;

[0031] The sampler is also used to draw plasma from the first collection container for immunoassay.

[0032] In an optional embodiment, the sampler is further used to absorb the plasma in the first collection container and discharge it into a reaction cup, and the immunoassay analyzer further includes:

[0033] a reagent assembly, used for discharging the reagent into the reaction cup;

[0034] A reaction component, used for incubating the plasma and reagents loaded in the reaction cup;

[0035] A magnetic separation component, used for performing magnetic separation and cleaning on the liquid in the reaction cup;

[0036] The detection component is used to detect the liquid after incubation reaction and magnetic separation and cleaning, and obtain the immunoassay result of the whole blood sample.

[0037] In a third aspect, the present invention also provides a collection container for a whole blood sample, wherein a filter assembly as described in any of the above embodiments is provided inside the collection container, and a accommodating cavity suitable for placing the sampler is provided in the filter assembly; when the sampler discharges the whole blood sample into the collection container, the blood cells in the whole blood sample are retained by the filter assembly, and the plasma in the whole blood sample enters the collection container. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific implementation methods or related technical descriptions. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 The overall structure diagram of a liquid path system according to an embodiment of the present utility model;

[0040] Figure 2 The structural schematic diagram of the first collection container and the filtering component in an embodiment of the present utility model;

[0041] Figure 3 The schematic diagram of collecting samples by a syringe and a sampler in an embodiment of the present utility model;

[0042] Figure 4 is Figure 1 The enlarged schematic diagram of part A in;

[0043] Figure 5 The structural schematic diagram of the syringe in an embodiment of the present utility model.

[0044] Explanation of reference numerals:

[0045] 1. Syringe; 11. Injection tube; 12. Injection plunger; 121. Operation part; 122. Pusher; 13. Injection port;

[0046] 2. Sampler; 21. Conical surface; 22. Sampling needle; 3. First collection container; 4. Filtering component. Detailed implementation manners

[0047] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model shall fall within the protection scope of the present utility model.

[0048] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0049] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can also be the communication inside two components. It can be a wireless connection or a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0050] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0051] Currently, the immunoassay devices on the market usually detect serum or plasma. In order to obtain serum or plasma from whole blood samples, usually three methods are adopted: The first is to centrifuge the whole blood sample in a centrifuge outside the analyzer in advance, and then test the centrifuged whole blood sample on the machine. This method is too cumbersome to operate and will affect work efficiency; the second is to design a dedicated centrifugation mechanism inside the analyzer, and directly aspirate and test the whole blood sample after centrifugation. Due to the large volume of the centrifugation mechanism and the relatively complex integration process, the cost of the integrated analyzer is high and the volume is large; the third is not to use a centrifugation mechanism, but to directly analyze the proportion of plasma and blood cells in the whole blood sample according to the HCT value of the general population, and then process the measurement results to obtain the concentration value of the whole blood sample. The accuracy of the measurement results of this method will have a certain deviation because the proportion of plasma and blood cells in different whole blood samples is different.

[0052] Therefore, the present utility model adopts a new liquid path system to process whole blood samples, which can simplify the operation while reducing costs and improving the accuracy of the results.

[0053] The following will be combined with Figures 1 to 5 , to describe the embodiments of the present utility model.

[0054] According to an embodiment of the present utility model, on the one hand, a liquid path system is provided, and the liquid path system includes a syringe 1, a sampler 2, a first collection container 3, a power source, a second collection container, and a controller.

[0055] Specifically, in the embodiment of the present utility model, the syringe 1 is provided with an injection port 13, and a power source is connected to the syringe 1. The power source is used to push the syringe 1 to suck and inject. The syringe 1 can be automatically operated by the power source to inhale or discharge a whole blood sample. Further, one end of the sampler 2 is provided with a sampling port, and the other end of the sampler 2 is provided with a connection port, and the connection port is communicated with the injection port 13. For the communication mode between the connection port and the injection port 13, it can be communicated through a hose, or an internal thread can be provided on the connection port and an external thread can be provided on the injection port 13, and the connection port and the injection port 13 can also be connected by threads.

[0056] Further, in the embodiment of the present utility model, the second collection container is used to load the whole blood sample. A filtering component 4 is arranged inside the first collection container 3, and an accommodation cavity suitable for placing the sampler 2 is arranged in the filtering component 4. The filtering component 4 is suitable for passing the plasma in the whole blood sample and intercepting the red blood cells in the whole blood sample, and the passed plasma enters the first collection container 3.

[0057] In actual application, technicians can directly use the second collection container for whole blood sampling. After blood collection, the second collection container loaded with the whole blood sample is placed into an immunoassay analyzer; or after blood collection, sub-sampling can be performed according to the detection requirements to obtain the second collection container loaded with the whole blood sample. The second collection container can be placed by the user into the sample injection device of the immunoassay analyzer, or can be placed by the user on the detection production line including the immunoassay analyzer. Then, the power source can simultaneously drive the syringe 1 and the sampler 2 to move between the first collection container 3 and the second collection container, suck the whole blood sample from the second collection container, and then discharge the whole blood sample into the first collection container 3. Among them, the blood cells in the whole blood sample are intercepted by the filtering component 4, and the plasma in the whole blood sample enters the first collection container 3.

[0058] For the moving mode of the sampler 2, it can be driven by the power source or by other moving devices. This embodiment is only an example, but it is not limited thereto. Those skilled in the art can change according to the actual situation to achieve the same technical effect.

[0059] With such a setting, in the embodiment of the present utility model, by providing the syringe 1 and the sampler 2, the syringe 1 and the sampler 2 can be automatically used by a power source to collect whole blood samples. After the collection is completed, the sampler 2 can be placed into the filtering component 4, and then the power source can be used to push the syringe 1 by itself to transfer all the whole blood samples inside the syringe 1 into the filtering component 4. Since pressure will be formed among the syringe 1 body, the sampler 2 and the filtering device when the plunger of the syringe 1 is pushed, the pressure effect will accelerate the separation of plasma and blood cells. By using the reusable sampler 2 and the first collection container 3 provided with the filtering component 4, plasma in the whole blood sample can be separated for immunoassay without increasing the components of the liquid path system, which can simplify the operation and reduce the cost of whole blood immunoassay while ensuring the accuracy of immunoassay.

[0060] Further, in an optional embodiment, the syringe 1 includes an injection tube 11 and an injection plunger 12.

[0061] Specifically, in the embodiment of the present utility model, one end of the injection tube 11 is provided with an insertion port, and the other end of the injection tube 11 is provided with the injection port 13. One end of the injection plunger 12 is provided with an operation part 121, and the operation part 121 is connected to the power source; the other end of the injection plunger 12 is provided with a push plug 122; the power source is used to drive the push plug 122 to move in the injection tube 11. When the injection plunger 12 is inserted into the injection tube 11, the push plug 122 is sealed with the inner wall of the injection tube 11 to ensure that the injection plunger 12 can normally push the whole blood sample in the injection tube 11 out from the injection port

[0062] 13.

[0062] Further, in an optional embodiment, the power source is also used to drive the position of the push plug 122 to move in the injection tube 11 so that the filtering component 4 is in a positive pressure state.

[0063] With such a setting, in the embodiment of the present utility model, before sampling, the power source can be used to drive the push plug 122 to aspirate a certain volume in advance. After the sampling is completed and the sample is discharged into the filtering component 4, the power source can be used to continue to push the push plug 122 forward, so that the aspirated volume can be used to pressurize the whole blood sample in the filtering component 4, which can accelerate the separation of plasma and blood cells in the whole blood sample. Or, after the sample is discharged, the power source is used to operate the syringe 1 to aspirate a certain volume, and then the power source is used to continue to push the push plug 122 forward, so that the aspirated volume can be used to pressurize the whole blood sample in the filtering component 4, which can accelerate the separation of plasma and blood cells in the whole blood sample.

[0064] Further, in an optional implementation manner, when the piston 122 is extruded to the first position of the syringe tube 11 under the driving of the power source, the whole blood sample collected in the sampler 2 is emptied; when the piston 122 is extruded to the second position of the syringe tube 11, the filtering component 4 is in a positive pressure state; the second position is farther from the injection port 13 than the first position.

[0065] That is to say, there is a certain space between the position where the syringe 1 stays before sampling, i.e., the initial position, and the extreme limit position of the movement of the piston 122 of the syringe 1. After emptying the whole blood sample, the syringe 1 continues to move downward an appropriate distance to reach the second position, so that the filtering component 4 remains in a certain positive pressure state, thereby accelerating the separation of plasma and blood cells. Therefore, by setting the first position and the second position of the piston 122, the separation of plasma and blood cells can be accelerated without adding additional components, and the operation is simple and fast, saving the time for sample processing and improving the detection efficiency.

[0066] Before sampling in the embodiment of the present utility model, the syringe 1 is operated by the power source to be in the first position to suck the whole blood sample. After emptying the whole blood sample, since the piston 122 has not reached the injection port 13, the piston 122 is driven by the power source to continue to move downward an appropriate distance to reach the second position, that is, at a position close to or reaching the injection port 13. The air volume between the first position and the injection port 13 can be compressed to keep the filtering component 4 in a certain positive pressure state, thereby accelerating the separation of plasma and blood cells. Therefore.

[0067] Further, in an optional implementation manner, after the whole blood sample in the second collection container is discharged into the first collection container 3, the power source is further used to drive the piston 122 to move upward to the third position and then move downward, so that the filtering component 4 is in a positive pressure state. The position of the piston 122 when the whole blood sample is emptied is closer to the injection port 13 than the third position, and, compared with the above embodiment, the first position is closer to the mouth of the syringe 1 than the third position.

[0068] With such a setting, after completely discharging the whole blood sample in the embodiment of the present utility model, the power source can drive the piston 122 to suck a certain volume of air by itself to reach the third position, and then the power source drives the piston 122 to continue to move downward to a position close to or reaching the injection port 13, which is closer to the mouth of the syringe 1 than the third position. Therefore, the air volume sucked can be compressed to keep the filtering component 4 in a certain positive pressure state, thereby accelerating the separation of plasma and blood cells. Therefore, the efficiency of sample processing can be improved without adding additional components, and the operation is simple and fast.

[0069] Furthermore, in an optional embodiment, the sampler 2 includes a sampling needle 22, and a conical surface 21 is provided at one end close to the filter component 4, and the conical surface 21 fits with the opening of the filter component 4 to form a sealed interface.

[0070] With such a configuration, the embodiment of the present invention can improve the sealing between the sampler 2 and the filter assembly 4 by providing the conical surface 21, making it convenient to pressurize the whole blood sample in the filter assembly 4 using the syringe 1, thereby improving work efficiency.

[0071] Furthermore, in an optional embodiment, the opening of the filter assembly 4 is provided with an inverted conical groove suitable for the conical surface 21 to be embedded.

[0072] Thus, the embodiment of the present invention, by providing an inverted conical groove, can ensure that the sampler 2 can be stably fixed to the filter assembly 4 after being placed on the filter assembly 4, thereby minimizing the possibility of the sampler 2 falling off the filter assembly 4 and ensuring stable operation of the device. It can also improve the sealing between the sampler 2 and the filter assembly 4, making it easier to pressurize the whole blood sample in the filter assembly 4 using the syringe 1, thereby improving work efficiency.

[0073] In the second aspect, the present invention also provides an immunoassay analyzer, which includes: a liquid path system as described in any of the above embodiments, the immunoassay analyzer also includes a grabber, the grabber is used to remove the filter component 4 from the first collection container 3; the sampler 2 is also used to absorb the plasma in the first collection container 3 for immunoassay.

[0074] With such a configuration, the embodiment of the utility model can automatically remove the filter component 4 from the first collection container 3 by providing a dedicated grabber. Compared with directly taking the filter component 4 by hand, it can also reduce the contamination of the whole blood sample by external pollutants, and at the same time protect the whole blood sample from being affected by the environment inside the tube, thereby ensuring the purity of the whole blood sample and the accuracy of analysis.

[0075] Furthermore, in an optional embodiment, the sampler 2 is also used to absorb the plasma in the first collection container 3 and discharge it into a reaction cup. The immunoassay analyzer also includes: a reagent component, a reaction component, a magnetic separation component and a detection component.

[0076] In this embodiment, the reagent component is used to discharge the reagent into the reaction cup, the reaction component is used to incubate the plasma and reagent loaded in the reaction cup, the magnetic separation component is used to magnetically separate and clean the liquid in the reaction cup, and the detection component is used to detect the liquid after incubation reaction and magnetic separation and cleaning to obtain the immunoassay results of the whole blood sample.

[0077] Among them, the number and sequence of incubation reactions and magnetic separations can be set according to the actual application function requirements, and are not limited herein.

[0078] Through the above-mentioned immunoassay analyzer, the immunoassay of whole blood samples can be realized. By using the reusable sampler 2 and the first collection container 3 provided with the filtration component 4, the plasma in the whole blood sample can be separated for immunoassay without adding components of the liquid path system, which can simplify the operation and reduce the cost of whole blood immunoassay while ensuring the accuracy of immunoassay.

[0079] In a third aspect, the present utility model further provides a collection container for whole blood samples. The interior of the collection container is provided with the filtration component 4 as described in any one of the above embodiments. The filtration component 4 is provided with a receiving cavity adapted to place the sampler 2. When the sampler 2 discharges the whole blood sample into the collection container, the blood cells in the whole blood sample are intercepted by the filtration component 4, and the plasma in the whole blood sample enters the collection container. By means of the collection container provided with the filtration component 4, the plasma in the whole blood sample can be separated for immunoassay, which can simplify the operation and reduce the cost of whole blood immunoassay while ensuring the accuracy of immunoassay.

[0080] Although the embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A fluid system, characterized in that: include: A syringe (1) provided with an injection port (13); A power source connected to the syringe (1); the power source is used to drive the syringe (1) to perform suction and discharge; A sampler (2), wherein one end of the sampler (2) is provided with a sampling port, and the other end of the sampler (2) is provided with a connecting port, wherein the connecting port is communicated with the injection port (13); a second collection container containing a whole blood sample; A first collection container (3) is provided with a filter assembly (4) therein, wherein the filter assembly (4) is provided with a receiving cavity suitable for receiving the sampler (2); The sampler (2) is also used to move between a first collection container (3) and a second collection container to discharge the whole blood sample drawn from the second collection container into the first collection container (3), wherein the blood cells in the whole blood sample are retained by the filter component (4) and the plasma in the whole blood sample enters the first collection container (3).

2. The fluid circuit system according to claim 1, characterized in that: The syringe (1) comprises: An injection tube (11), wherein one end of the injection tube (11) is provided with an insertion port, and the other end of the injection tube (11) is provided with the injection port (13); An injection plug (12) is provided with an operating portion (121) at one end of the injection plug (12), and the operating portion (121) is connected to the power source; a push plug (122) is provided at the other end of the injection plug (12); the push plug (122) is driven by the power source to move in the injection tube (11).

3. The fluid circuit system according to claim 2, characterized in that: The power source is also used to drive the plunger (122) to move in the injection tube (11) to place the filter assembly (4) in a positive pressure state.

4. The fluid circuit system according to claim 3, characterized in that: Under the driving action of the power source, when the plunger (122) is squeezed to the first position of the injection tube (11), the whole blood sample collected in the sampler (2) is emptied; when the plunger (122) is further squeezed to the second position of the injection tube (11), the filter assembly (4) is in a positive pressure state; the second position is closer to the injection port (13) than the first position.

5. The fluid circuit system according to claim 3, characterized in that: After the whole blood sample in the second collection container is discharged into the first collection container (3), the power source is further used to drive the plunger (122) to move upward to a third position and then downward, so that the filter assembly (4) is in a positive pressure state; the position of the plunger (122) from which the whole blood sample is discharged is closer to the injection port (13) than the third position.

6. The fluid circuit system according to any one of claims 1 to 3, characterized in that: The sampler (2) comprises: The sampling needle (22) is provided with a tapered surface (21) at one end close to the filter assembly (4), and the tapered surface (21) fits with the opening of the filter assembly (4) to form a sealed interface.

7. The fluid circuit system according to claim 6, characterized in that: The opening of the filter assembly (4) is provided with an inverted conical groove suitable for the conical surface (21) to be embedded.

8. An immunoassay analyzer, characterized in that: include: The fluid circuit system according to any one of claims 1 to 7, wherein the immunoassay analyzer further comprises: a gripper for removing the filter assembly (4) from the first collection container (3); The sampler (2) is also used to draw the plasma in the first collection container (3) for immunoassay.

9. The immunoassay analyzer according to claim 8, characterized in that: The sampler (2) is further used to absorb the plasma in the first collection container (3) and discharge it into a reaction cup. The immunoassay analyzer further comprises: a reagent assembly, used for discharging the reagent into the reaction cup; A reaction component, used for incubating the plasma and reagents loaded in the reaction cup; A magnetic separation component, used for performing magnetic separation and cleaning on the liquid in the reaction cup; The detection component is used to detect the liquid after incubation reaction and magnetic separation and cleaning, and obtain the immunoassay result of the whole blood sample.

10. A whole blood sample collection container, characterized in that: include: The collection container is provided with a filter component (4) as described in any one of claims 1 to 7, and the filter component (4) is provided with a receiving cavity suitable for being placed in the sampler (2); when the sampler (2) discharges the whole blood sample into the collection container, the blood cells in the whole blood sample are retained by the filter component (4), and the plasma in the whole blood sample enters the collection container.

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