An extraction device for bilirubin concentration detection

Abstract

This utility model relates to the field of bilirubin concentration detection technology, and mainly to an extraction device for bilirubin concentration detection. It includes an aspirator tube for serum aspiration, a storage frame, and an operating tube. Multiple aspirator tubes are inserted into the storage frame. The operating tube has a connector, and the connector and the storage frame have a docking part. The storage frame has a pushing part for moving multiple aspirator tubes into the operating tube, and a pushing component is located inside the operating tube. This utility model optimizes the traditional serum collection method for bilirubin concentration detection. By using a designed negative pressure adsorption component in conjunction with the aspirator tube, it achieves the absorption and storage of the upper serum layer. Compared with the traditional method of immediate transfer after aspirating with a pipette, personnel can extract all the serum in batches at once. During operation, it effectively avoids forgetting to replace the pipette or serum contamination caused by contact between the pipette and the outside environment.

Description

Technical Field

[0001] This utility model relates to the field of bilirubin concentration detection technology, specifically to an extraction device for bilirubin concentration detection. Background Technology

[0002] Bilirubin is the main pigment in bile, and it is orange-yellow in color. Its main source is the decomposition of hemoglobin from aging red blood cells. The level of bilirubin can reflect the health status of the liver, gallbladder, and red blood cells. Clinically, it is often used as an important indicator for diagnosing liver diseases, hemolytic diseases, and neonatal jaundice.

[0003] One existing method for bilirubin concentration testing involves first collecting peripheral blood via venipuncture. The blood sample is then allowed to stand or coagulate before being centrifuged at high speed (typically 3000-4000 rpm for 5-10 minutes). Centrifugal force separates components of different densities into layers. The upper serum layer is then carefully aspirated using a pipette or tube. The collected serum sample is then reacted with a diazo reagent or bilirubin oxidase to detect bilirubin concentration. When collecting large batches of serum samples, multiple disposable pipettes are required. After aspirating the serum, it is transferred to the target container. Since there is no sealing measure, the serum in the pipette needs to be quickly transferred to the target container before replacing it with a new pipette for the next round of serum extraction. In batch testing, frequent aspiration and transfer are necessary, increasing the risk of errors such as forgetting to change pipettes or the risk of contamination due to contact between the pipette and external elements during transfer. Utility Model Content

[0004] The purpose of this invention is to provide an extraction device for bilirubin concentration detection, so as to solve the problem of serum susceptibility to infection caused by the need for transfer during the serum aspiration process in bilirubin concentration detection as mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an extraction device for bilirubin concentration detection, comprising an aspiration tube for serum aspiration, a storage frame, and an operating tube. Multiple aspiration tubes are inserted into the storage frame. The operating tube is provided with a mating interface, and the mating interface and the storage frame have a mating portion. The storage frame is provided with a pushing portion for moving multiple aspiration tubes into the operating tube, and a pushing component is provided inside the operating tube. The pushing component pushes the aspiration tubes inside the operating tube downwards. The bottom end of the aspiration tube is provided with a limiting portion. A negative pressure adsorption component is provided on the outside of the aspiration tube, and the negative pressure adsorption component is adapted to the pushing component.

[0006] Preferably, the push-down assembly includes a push-down plate disposed within the operating tube, a connecting rod fixed to the push-down plate, a pressing plate fixed to the connecting rod, a movable opening provided on the outer side of the operating tube, and a mating plate adapted to the movable opening fixed on the push-down plate, a resetting component installed in the movable opening to drive the push-down plate to move upward and reset, a handle for human hand gripping fixed on the outer side of the operating tube, a connecting spring fixed to the bottom of the push-down plate, and a fitting plate fixed to the outer end of the connecting spring.

[0007] Preferably, the reset component includes a reset spring, the two ends of which are fixed to the docking plate and the inner wall of the top of the moving port, respectively.

[0008] Preferably, the negative pressure adsorption assembly includes a docking seat fixed to the outside of the operating tube, a negative pressure plate rotatably installed inside the docking seat, and a pressing arc rod fixed inside the negative pressure plate. The pressing arc rod slides through the storage frame and the operating tube, and abuts against the outside of the suction tube inside the operating tube. A spring sheet is fixed to the outer wall of the operating tube, and a linkage component adapted to the negative pressure plate and the docking plate is installed on the outside of the operating tube.

[0009] Preferably, the linkage includes a linkage rod that is slidably inserted into the outer wall of the operating tube. One end of the linkage rod is in contact with the outer side of the negative pressure plate, and the other end is fixed with a linkage plate. The mating plate moves down to press the linkage plate, thereby pressing the negative pressure plate.

[0010] Preferably, a pressing plate is rotatably mounted on the outer side of the pressing plate, and a stop block adapted to the pressing plate is fixed on the operating tube.

[0011] Preferably, the docking part includes a docking concave plate disposed at the docking interface, a docking strip adapted to the docking concave plate is fixed on the outer side of the storage frame, a support frame is fixed on the docking concave plate, and an insert rod is fixed inside the support frame. A limiting hole is opened on the storage frame, a limiting post adapted to the limiting hole is slidably inserted on the insert rod, a pull plate is fixed on the outer side of the limiting post, and mutually repelling magnetic blocks are disposed at the adjacent ends of the limiting post and the support frame.

[0012] Preferably, the suction tube consists of a tube body, a suction nozzle, and a sealing tube. The bottom of the tube body is fixedly connected to the suction nozzle, and end plates are fixed at both ends of the tube body. The sealing tube is threadedly inserted into the bottom of the tube body, and a sealing plug adapted to the suction nozzle is fixed inside the sealing tube.

[0013] Preferably, the limiting part includes an end ring fixed to the bottom of the operating tube, the bottom of the operating tube is provided with a plurality of movable holes at equal angles, and a limiting ball is slidably inserted in the movable holes. Both ends of the movable holes are provided with inner buckles that fit against the outer side of the limiting ball. A limiting ring is slidably sleeved on the outer side of the operating tube, and a compression spring is provided between the limiting ring and the end ring.

[0014] Preferably, the pushing part includes a pushing plate disposed in the storage frame, the pushing plate being in contact with the inner wall of the storage frame, and a pushing spring fixed in the storage frame and fixed to the pushing plate, and a limiting strip adapted to the end plate being fixed in the storage frame.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention optimizes the traditional serum collection method for bilirubin concentration detection. By using a designed negative pressure adsorption component in conjunction with the suction tube, the upper layer of serum is absorbed and stored. Compared with the traditional method of immediate transfer after suction, personnel can extract all the serum in batches at once, without having to transfer the serum after each extraction. During the operation, it can effectively avoid forgetting to change the suction tube or serum contamination caused by contact between the suction tube and the outside environment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of this utility model from another angle;

[0019] Figure 3 This is a schematic diagram showing the storage frame and operating tube of this utility model in their disassembled state;

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is a front view of the operating tube of this utility model;

[0022] Figure 6 This is a partial cross-sectional rear side view of the operating tube of this utility model;

[0023] Figure 7 This is a magnified view of point B in section 6;

[0024] Figure 8 This is a partial cross-sectional view of the internal structure of the storage frame of this utility model;

[0025] Figure 9 This is a schematic diagram of the suction tube structure in this utility model.

[0026] In the diagram: 1. Suction tube; 2. Storage frame; 3. Operating tube; 4. Docking part; 5. Pushing part; 6. Downward push assembly; 7. Limiting part; 8. Negative pressure adsorption assembly; 9. Downward push plate; 10. Connecting rod; 11. Press plate; 12. Moving port; 13. Docking plate; 14. Reset component; 15. Reset tension spring; 16. Docking seat; 17. Negative pressure plate; 18. Pressing arc rod; 19. Spring plate; 20. Linkage component; 21. Linkage rod; 22. Linkage plate; 2 3. Pressing plate; 24. Butt joint concave plate; 25. Butt joint strip; 26. Support frame; 27. Insert rod; 28. Limiting hole; 29. ​​Limiting post; 30. Tube body; 31. Suction nozzle; 32. Sealing tube; 33. End plate; 34. Sealing plug; 35. End ring; 36. Moving hole; 37. Limiting ball; 38. Limiting ring; 39. Compression spring; 40. Push plate; 41. Push spring; 42. Limiting strip; 43. Connecting spring; 44. Adhesive plate. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1: Please refer to Figure 1 - Figure 3 The diagram shows an extraction device for detecting bilirubin concentration, including an aspiration tube 1 for aspirating serum, a storage frame 2, and an operating tube 3. The storage frame 2 is used to store several aspiration tubes 1. The operating tube 3 is provided with a docking interface, and a docking part 4 is provided at the docking end of the docking interface and the storage frame 2. The storage frame 2 is provided with a pushing part 5 for moving several aspiration tubes 1 into the operating tube 3, and a pushing component 6 is provided in the operating tube 3. The pushing component 6 pushes the aspiration tubes 1 in the operating tube 3 downward. The bottom end of the aspiration tube 1 is provided with a limiting part 7. A negative pressure adsorption component 8 is provided on the outside of the aspiration tube 1. The negative pressure adsorption component 8 is adapted to the pushing component 6.

[0029] In this scheme, several suction tubes 1 are pre-installed in the storage frame 2. Then, the storage frame 2 is connected to the operating tube 3. The operator operates the push-down component 6 to push the suction tube 1 in the operating tube 3 to the working position. Then, it comes into contact with the upper serum in the separated blood sample. The negative pressure adsorption component 8 adsorbs the serum. After adsorption is complete, the serum is sealed and stored in the suction tube 1. The operator opens the limiting part 7 and removes the suction tube 1 from the bottom of the operating tube 3. Then, the push part 5 pushes the next suction tube 1 into the operating tube 3 for the next round of serum extraction. This allows the operator to extract a batch of serum at once, reducing errors during the operation and avoiding serum contamination.

[0030] In this plan, refer to Figure 9 The suction tube 1 consists of a tube body 30, a suction nozzle 31, and a sealing tube 32. The bottom of the tube body 30 is fixedly connected to the suction nozzle 31. End plates 33 are fixed at both ends of the tube body 30. The sealing tube 32 is threadedly inserted into the bottom of the tube body 30. A sealing plug 34 that is compatible with the suction nozzle 31 is fixed inside the sealing tube 32.

[0031] It should be noted that the tube body 30 itself is elastic. The negative pressure adsorption component 8 squeezes the outside of the tube body 30, making its shape concave. When the tube body 30 recovers its elasticity, it will generate suction inside, thereby drawing the serum into the suction nozzle 31. After suction is completed, the sealing tube 32 is threaded together, and the sealing plug 34 is used to plug the outer end of the sealing tube 32 to achieve a sealing effect.

[0032] For further details, please refer to [link / reference]. Figure 1 - Figure 3 as well as Figure 5 and Figure 6 The push-down assembly 6 includes a push-down plate 9 disposed inside the operating tube 3, a connecting rod 10 fixed on the push-down plate 9, and a pressing plate 11 fixed on the connecting rod 10. A moving port 12 is opened on the outside of the operating tube 3. A docking plate 13 adapted to the moving port 12 is fixed on the push-down plate 9. A reset member 14 for driving the push-down plate 9 to move upward and reset is installed inside the moving port 12. A handle for human hand grip is fixed on the outside of the operating tube 3. A connecting spring 43 is fixed at the bottom of the push-down plate 9, and a fitting plate 44 is fixed at the outer end of the connecting spring 43.

[0033] The reset component 14 includes a reset spring 15, with both ends of the reset spring 15 fixed to the top inner wall of the docking plate 13 and the moving port 12, respectively.

[0034] In this solution, the principle of moving the suction tube 1 inside the operating tube 3 downward is achieved by using the push-down component 6:

[0035] First, the pusher 5 pushes a suction tube 1 into the operating tube 3. Then, the person holds the handle and presses down on the button 11 with their thumb, which moves the connecting rod 10 down, so that the fitting plate 44 squeezes the suction tube 1 down and makes the bottom of the suction tube 1 abut against the limiting part 7, so that the suction tube 1 reaches the suction state.

[0036] After the suction operation is completed, the operator releases the button 11. Under the action of the reset spring 15, the push plate 9 is pulled upward, so that the button 11 is reset, which facilitates the docking of the next suction tube 1.

[0037] It should also be noted that an arc-shaped baffle is fixed to the outside of the push plate 9. The arc-shaped baffle fits against the outside of the suction tube 1, so that when the suction tube 1 in the operating tube 3 is pushed down, the suction tube 1 in the storage frame 2 will not collide with the suction tube 1 in the operating tube 3.

[0038] For further details, please refer to [link / reference]. Figure 1 - Figure 3 as well as Figure 5 and Figure 6 The negative pressure adsorption assembly 8 includes a docking seat 16 fixed to the outside of the operating tube 3, a negative pressure plate 17 rotatably installed inside the docking seat 16, a pressing arc rod 18 fixed inside the negative pressure plate 17, the pressing arc rod 18 sliding through the storage frame 2 and the operating tube 3, and abutting against the outside of the suction tube 1 inside the operating tube 3, a spring sheet 19 fixed to the outer wall of the operating tube 3, and a linkage component 20 adapted to the negative pressure plate 17 and the docking plate 13 installed on the outside of the operating tube 3;

[0039] The linkage component 20 includes a linkage rod 21 that is slidably inserted into the outer wall of the operating tube 3. One end of the linkage rod 21 is in contact with the outer side of the negative pressure plate 17, and the other end is fixed with a linkage plate 22. The docking plate 13 moves down to squeeze the linkage plate 22, thereby pressing the negative pressure plate 17.

[0040] In this scheme, the principle of using the push-down component 6 to drive the negative pressure adsorption component 8 to perform adsorption operation is utilized.

[0041] First, by operating the push assembly 6, the suction tube 1 is pushed down to the working position. Then, the sealing tube 32 is opened, and the operator continues to press the push plate 11, causing the push plate 9 to continue moving down. The connecting spring 43 is squeezed, and at the same time, the push plate 9 drives the docking plate 13 to move down and abut against the linkage plate 22, which in turn drives the linkage plate 22 to move down, causing the linkage rod 21 to move down and squeeze the negative pressure plate 17. This, in turn, drives the two pressing arc rods 18 to squeeze the tube body 30. Then, the suction nozzle 31 is moved to the serum. At this time, the operator slowly releases the push plate 11. Under the action of the spring plate 19, the negative pressure plate 17 and the pressing arc rods 18 are slowly reset and separated from the tube body 30. The tube body 30 begins to rebound due to its own elasticity, thereby generating negative pressure inside and adsorbing the serum. After adsorption is complete, the operator closes the sealing tube 32, completing the serum adsorption and sealing storage operation, which facilitates the adsorption of all serum at once.

[0042] For further details, please refer to [link / reference]. Figure 6 and Figure 7 The limiting part 7 includes an end ring 35 fixed to the bottom of the operating tube 3. The bottom of the operating tube 3 is provided with multiple moving holes 36 at equal angles. A limiting ball 37 is slidably inserted in the moving hole 36. Both ends of the moving hole 36 are provided with an inner buckle that fits against the outer side of the limiting ball 37. A limiting ring 38 is slidably sleeved on the outer side of the operating tube 3. A compression spring 39 is provided between the limiting ring 38 and the end ring 35.

[0043] In this scheme, the compression spring 39 generates elastic force, which drives the limiting ring 38 to move downward, squeezing the limiting ball 37. This causes the outer side of the limiting ball 37 to move to the inner side of the operating tube 3 and abut against the end plate 33 on the suction tube 1, thus completing the limiting operation of the suction tube 1. After the serum is collected, the operator can push up the limiting ring 38 to release the limiting on the outer side of the limiting ball 37. The operator can then pull down the suction tube 1 to disassemble the suction tube 1 after the serum is collected, facilitating the next round of serum collection.

[0044] For further details, please refer to [link / reference]. Figure 8 The pushing part 5 includes a pushing plate 40 disposed in the storage frame 2. The pushing plate 40 is attached to the inner wall of the storage frame 2. A pushing spring 41 fixed to the pushing plate 40 is fixed in the storage frame 2. A limiting strip 42 adapted to the end plate 33 is fixed in the storage frame 2.

[0045] It should be noted that by using the limiting strip 42 to contact the end plate 33, the suction tube 1 is more stable when moving in the storage frame 2. At the same time, with the help of the push spring 41 and the push plate 40, several suction tubes 1 can be discharged outward, which is more convenient when collecting serum in batches.

[0046] For further details, please refer to [link / reference]. Figure 3 and Figure 4The docking part 4 includes a docking concave plate 24 disposed at the docking interface. A docking strip 25 adapted to the docking concave plate 24 is fixed on the outside of the storage frame 2. A support frame 26 is fixed on the docking concave plate 24. An insert rod 27 is fixed inside the support frame 26. A limit hole 28 is opened on the storage frame 2. A limit post 29 adapted to the limit hole 28 is slidably inserted into the insert rod 27. The outer end of the limit post 29 is a hemispherical structure. A pull plate is fixed on the outside of the limit post 29. Mutually repulsive magnetic blocks are provided at the adjacent ends of the limit post 29 and the support frame 26.

[0047] In this scheme, when the storage frame 2 and the operating tube 3 are connected, the personnel first insert the storage frame 2 into the interface from top to bottom. During the insertion, the connecting strip 25 is inserted into the connecting concave plate 24. During the insertion process, the limiting post 29 will be pushed open. After the insertion is completed, the limiting post 29 will be inserted into the limiting hole 28 on the storage frame 2 due to repulsion, thus completing the connection of the storage frame 2.

[0048] When disassembling storage frame 2, simply pull the pull plate outward to move the limiting post 29 outward and disengage it from the limiting hole 28. Then, the personnel move upward and remove storage frame 2.

[0049] This protocol outlines the specific procedures for serum extraction during bilirubin concentration detection, including the following steps:

[0050] The first step is to let the collected blood sample stand for 15 minutes or until it coagulates;

[0051] The second step is to centrifuge the blood sample at high speed (3000-4000 rpm for 5-10 minutes) to obtain a stratified blood sample.

[0052] The third step is for the operator to hold the handle and align the suction tube 1 inside the operating tube 3 with the upper serum, and use the negative pressure adsorption component 8 to squeeze the suction tube 1 to draw up the serum.

[0053] Fourth step, seal the suction tube 1 and remove the suction tube 1, and use the pusher 5 to push the new suction tube 1 into the operation tube 3;

[0054] Fifth, repeat steps three and four until the suction tubes 1 in storage frame 2 are used up. Then, open the docking part 4, remove storage frame 2, load new suction tubes 1, install storage frame 2, and continue suctioning serum until the batch suction operation is completed.

[0055] In this solution, the designed suction tube 1 and related structures for storing, pushing, and squeezing the suction tube 1 are used to complete the adsorption and storage of serum using the suction tube 1. This allows personnel to perform only the serum aspiration step at a time when processing serum in batches, without the need to transfer the serum. Compared with the traditional pipette aspiration method, this avoids serum contamination caused by pipette infection and operational errors during the transfer process.

[0056] Example 2: Please refer to Figure 5 as well as Figure 6 This embodiment further explains the first embodiment, and the difference lies in the optimization of the operation of the button 11.

[0057] Specifically, a pressing plate 23 is rotatably mounted on the outside of the pressing plate 11, and a stop block adapted to the pressing plate 23 is fixed on the operating tube 3.

[0058] In this solution, after the personnel push the suction tube 1 down to the working position, the sealing tube 32 at the bottom of the suction tube 1 needs to be disassembled. At this time, the personnel can rotate the pressing plate 23 to abut against the stop block to prevent the pressing plate 11 from moving upward.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0060] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An extraction device for detecting bilirubin concentration, characterized in that, include: A suction tube (1) for serum aspiration, and; Storage frame (2) and operating tube (3), multiple suction tubes (1) are inserted in the storage frame (2), the operating tube (3) is provided with a docking interface, and the docking interface and the docking end of the storage frame (2) are provided with a docking part (4), the storage frame (2) is provided with a pushing part (5) for moving multiple suction tubes (1) into the operating tube (3), and; A push-down assembly (6) is installed inside the operating tube (3). The push-down assembly (6) pushes down the suction tube (1) inside the operating tube (3). A limiting part (7) is provided at the bottom end of the suction tube (1). A negative pressure adsorption assembly (8) is provided on the outside of the suction tube (1), and the negative pressure adsorption assembly (8) is adapted to the push-down assembly (6).

2. The extraction device for bilirubin concentration detection according to claim 1, characterized in that: The push-down assembly (6) includes a push-down plate (9) disposed in the operating tube (3), a connecting rod (10) fixed on the push-down plate (9), and a pressing plate (11) fixed on the connecting rod (10). A moving port (12) is opened on the outside of the operating tube (3), and a docking plate (13) adapted to the moving port (12) is fixed on the push-down plate (9). A reset member (14) for driving the push-down plate (9) to move upward and reset is installed in the moving port (12). A handle for human hand grip is fixed on the outside of the operating tube (3). A connecting spring (43) is fixed at the bottom of the push-down plate (9), and a fitting plate (44) is fixed at the outer end of the connecting spring (43).

3. The extraction device for bilirubin concentration detection according to claim 2, characterized in that: The reset component (14) includes a reset spring (15), the two ends of which are fixed to the top inner wall of the docking plate (13) and the moving port (12), respectively.

4. The extraction device for bilirubin concentration detection according to claim 1, characterized in that: The negative pressure adsorption assembly (8) includes a docking seat (16) fixed on the outside of the operating tube (3). A negative pressure plate (17) is rotatably installed inside the docking seat (16), and a pressing arc rod (18) is fixed inside the negative pressure plate (17). The pressing arc rod (18) slides through the storage frame (2) and the operating tube (3) and abuts against the outside of the suction tube (1) inside the operating tube (3). A spring sheet (19) is fixed on the outer wall of the operating tube (3) and abuts against the negative pressure plate (17). A linkage component (20) adapted to the negative pressure plate (17) and the docking plate (13) is installed on the outside of the operating tube (3).

5. The extraction device for bilirubin concentration detection according to claim 4, characterized in that: The linkage component (20) includes a linkage rod (21) that is slidably inserted into the outer wall of the operating tube (3). One end of the linkage rod (21) is in contact with the outer side of the negative pressure plate (17), and the other end is fixed with a linkage plate (22). The docking plate (13) moves down to squeeze the linkage plate (22) to press the negative pressure plate (17).

6. The extraction device for bilirubin concentration detection according to claim 2, characterized in that: A pressing plate (23) is rotatably mounted on the outside of the pressing plate (11), and a stop block adapted to the pressing plate (23) is fixed on the operating tube (3).

7. The extraction device for bilirubin concentration detection according to claim 1, characterized in that: The docking part (4) includes a docking concave plate (24) disposed at the docking interface. A docking strip (25) adapted to the docking concave plate (24) is fixed on the outside of the storage frame (2). A support frame (26) is fixed on the docking concave plate (24), and an insert rod (27) is fixed inside the support frame (26). A limiting hole (28) is opened on the storage frame (2). A limiting post (29) adapted to the limiting hole (28) is slidably inserted on the insert rod (27). A pull plate is fixed on the outside of the limiting post (29). Mutually repelling magnetic blocks are disposed at the adjacent ends of the limiting post (29) and the support frame (26).

8. The extraction device for bilirubin concentration detection according to claim 1, characterized in that: The suction tube (1) consists of a tube body (30), a suction nozzle (31), and a sealing tube (32). The bottom of the tube body (30) is fixedly connected to the suction nozzle (31), and end plates (33) are fixed at both ends of the tube body (30). The sealing tube (32) is threadedly inserted into the bottom of the tube body (30), and a sealing plug (34) that is compatible with the suction nozzle (31) is fixed inside the sealing tube (32).

9. The extraction device for bilirubin concentration detection according to claim 1, characterized in that: The limiting part (7) includes an end ring (35) fixed to the bottom of the operating tube (3). The bottom of the operating tube (3) is provided with a plurality of moving holes (36) at equal angles. A limiting ball (37) is slidably inserted in the moving hole (36). Both ends of the moving hole (36) are provided with an inner buckle that fits against the outside of the limiting ball (37). A limiting ring (38) is slidably sleeved on the outside of the operating tube (3). A compression spring (39) is provided between the limiting ring (38) and the end ring (35).

10. The extraction device for bilirubin concentration detection according to claim 1, characterized in that: The pushing part (5) includes a pushing plate (40) disposed in the storage frame (2), the pushing plate (40) is in contact with the inner wall of the storage frame (2), and a pushing spring (41) fixed in the storage frame (2) is fixed to the pushing plate (40), and a limiting strip (42) adapted to the end plate (33) is fixed in the storage frame (2).

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