Blood sampler

Abstract

The invention discloses a blood sampler, and relates to the technical field of blood sampling. Comprising a blood collection piece, a flow guide piece is installed in the blood collection piece, and the flow guide piece is used for guiding blood to the bottom of the blood collection piece; the blood collection piece is sleeved with a lifting adjusting piece; a lifting isolation piece is mounted in the blood collection piece; the lifting isolation piece magnetically attracts the lifting adjusting piece; a puncture sampling piece is mounted on the blood collection piece; an anticoagulant is conveniently drained to the inner side of the drainage tube by utilizing the lifting isolation piece, and the flow guide piece can be used for draining blood, so that the blood can be conveniently and directly discharged from an anticoagulant solvent at the bottom of the blood collection tube during collection, and the anticoagulant effect is ensured; the problems that according to an existing blood sampler, direct anticoagulation drainage to a solvent is not convenient, clear liquid is not convenient to isolate, protect and separate, and butt joint is tedious through manual single-hand operation are solved.

Description

Technical Field

[0001] This invention relates to the field of blood sampling technology, specifically to a blood sampler. Background Technology

[0002] Blood sampling tubes, also known as vacuum blood collection tubes, are usually distinguished by the color of their caps. Their core function is to ensure that blood samples are in a specific state before testing, such as anticoagulation. Depending on the requirements, different solvents may be added to the sampling tube or not, to meet the requirements of different tests. Current blood samplers usually require manual vertical operation to ensure that the drop of blood mixes directly with the solvent in the tube. This makes it difficult to directly drain the anticoagulated blood to the solvent, and blood tends to adhere to the inner wall of the blood collection tube. It also makes it difficult to isolate and separate the clear fluid, and sediment can be easily aspirated during subsequent serum extraction. Manual operation is not stable enough, affecting experimental data. In addition, because vacuum blood collection tubes are used, doctors usually need to ensure that the needle is connected to the blood collection tube after puncturing and bleeding, to prevent blood collection failure caused by negative pressure aspiration before bleeding. Manual single-handed operation is cumbersome, increases the blood collection failure rate, and is prone to bacterial contamination.

[0003] Therefore, we propose a blood sampler. Summary of the Invention

[0004] The purpose of this invention is to provide a blood sampler to solve the problems mentioned in the background art, such as the inconvenience of direct anticoagulation and drainage to the solvent, the inconvenience of isolation and protection of the separated clear liquid, and the cumbersome manual one-handed operation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a blood sampler, comprising a blood collection component, wherein a flow guide is installed inside the blood collection component to guide blood to the bottom of the blood collection component; a lifting adjustment component is sleeved on the blood collection component; a lifting isolation component is installed inside the blood collection component; the lifting isolation component magnetically attracts the lifting adjustment component; a puncture sampling component is installed on the blood collection component; a needle control component is installed on the puncture sampling component; the needle control component is used to control the reception of blood; the blood collection component includes: a blood collection tube and a stop ring, wherein the stop ring is fixedly installed inside the blood collection tube; and the outer side of the blood collection tube is threaded.

[0006] Preferably, the blood collection device further includes: a rubber pad, a sealing cap, and a connecting magnet; the rubber pad is fixedly installed on the blood collection tube; the rubber pad is a soft rubber structure; the sealing cap is threaded onto the blood collection tube; the connecting magnet is fixedly installed on the sealing cap, and the connecting magnet and the sealing cap are concentric; the sealing cap has a through hole; the blood collection tube is pre-stored with solvent; the blood collection tube is a transparent plastic structure.

[0007] Preferably, the guide component includes: a collection shell, a rubber stopper, and a drainage tube. The collection shell is fitted inside the blood collection tube; the collection shell is slidably inserted into the stop ring; the collection shell has an inclined structure; a rubber stopper is fixedly installed on the top of the collection shell; the top edge of the rubber stopper is attached to the top of the blood collection tube; the inner side of the sealing cap is pressed against the rubber stopper; a drainage tube is fixedly installed on the bottom of the collection shell, and the drainage tube is located inside the blood collection tube; a groove is provided in the middle of the rubber stopper.

[0008] Preferably, the guide further includes: a diffuser mask, wherein the diffuser mask is fixedly installed at the bottom of the drainage tube, and the outer side of the diffuser mask has a sloping structure; the outer diameter of the diffuser mask is larger than the diameter of the drainage tube.

[0009] Preferably, the lifting adjustment component includes: a sliding sleeve and an outer magnet, the sliding sleeve being slidably fitted onto the blood collection tube; rubber rings are provided on both sides of the sliding sleeve, and the rubber rings on both sides of the sliding sleeve elastically fit the blood collection tube; an outer magnet is fixedly installed on the inner side of the sliding sleeve, and the outer magnet is located on the outer side of the blood collection tube.

[0010] Preferably, the lifting isolation component includes: a lifting inner sleeve and a suction tube isolation groove, wherein the lifting inner sleeve is fitted inside the blood collection tube; the lifting inner sleeve has a through hole in the middle; the drainage tube passes through the lifting inner sleeve; a suction tube isolation groove is provided on the inner side of the top of the lifting inner sleeve; the suction tube isolation groove is used to fit the end of the suction tube; a rubber coating is provided in the through hole in the middle of the lifting inner sleeve, and the rubber coating on the inner side of the lifting inner sleeve is used to fit the expanding mask; the inner diameter of the through hole in the middle of the lifting inner sleeve is the same as the outer diameter of the expanding mask.

[0011] Preferably, the lifting isolation component further includes: an inner magnet, wherein an inner magnet is fixedly installed on the inner side of the lifting inner sleeve, and the inner magnet magnetically attracts an outer magnet; the outer magnet is used to magnetically attract and guide the inner magnet to lift.

[0012] Preferably, the puncture sampling device includes: a puncture connecting needle, a catheter, and a protective sleeve. The puncture connecting needle is threaded; the end of the puncture connecting needle is provided with a needle tip; a protective sleeve is fixedly installed on the puncture connecting needle, and the protective sleeve is located outside the needle tip at the end of the puncture connecting needle; a catheter is fixedly installed on the puncture connecting needle; the catheter is a soft structure; the needle tip at the end of the puncture connecting needle is used to puncture the protective sleeve and the rubber stopper; the protective sleeve is used to insert into the groove on the rubber stopper; the protective sleeve passes through a through hole provided on the sealing cap.

[0013] Preferably, the puncture sampling device further includes: a puncture needle and a switch, wherein the puncture needle is fixedly installed at the end of the catheter; the end of the puncture needle is provided with a needle tip; the puncture needle is used to puncture a blood vessel; a switch is fixedly installed on the handle on the side of the puncture needle, and the puncture needle is connected to the catheter.

[0014] Preferably, the insertion control component includes: a threaded sleeve, an electromagnet, a connecting spring, and a magnetic plate. The threaded sleeve is threadedly connected to the puncture connecting needle. An electromagnet is fixedly installed on the outer side of the threaded sleeve, and a connecting spring is fixedly installed on the bottom of the electromagnet. A magnetic plate is fixedly installed on the bottom end of the connecting spring, and the magnetic plate magnetically connects to a magnet. The electromagnet is used to magnetically connect to the magnet. The electromagnet is powered in series with a switch.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention uses a rubber pad to indicate the negative pressure inside the blood collection tube, preventing leakage and ensuring effective blood collection. A flow guide allows blood to drain directly from the anticoagulant at the bottom of the tube, guaranteeing anticoagulation. Medical personnel do not need to keep the blood collection tube completely vertical; normal holding is sufficient. This avoids the problem of blood contacting the inner wall of the blood collection tube first when it is tilted, as this can cause blood to adhere to the inner wall before mixing with the anticoagulant, leading to clotting.

[0016] The lifting isolator can be used to cover the anticoagulant at the bottom of the blood collection tube when it is lowered to the outside of the mask. This facilitates the drainage of the anticoagulant to the inside of the drainage tube, allowing it to adhere to the inner wall of the drainage tube and collection shell. This prevents blood clotting inside the drainage tube and collection shell during blood drainage, further ensuring the anticoagulant effect of the structure. The lifting isolator also helps to isolate the clear liquid and sediment when blood is collected and serum is separated directly without anticoagulant. This avoids the problem of aspirating sediment due to hand-held shaking, which could interfere with the experiment. It can also help to stop and limit the movement of the pipette end.

[0017] Using a puncture sampling device in conjunction with a needle control device allows staff to quickly control the timing of blood sampling. This eliminates the need for staff to manually insert the puncture needle into the blood vessel with one hand, maintain the stability of the puncture needle, and simultaneously insert the connecting needle into the rubber stopper with the other hand, which can easily cause needlestick injuries and is extremely cumbersome. Novices are also prone to failing to collect blood. This structure allows for pre-installation with magnetic attraction and direct electromagnetic control for blood collection, ensuring convenient blood sampling for medical staff before the connecting needle is inserted into the rubber stopper. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a blood sampler according to the present invention; Figure 2 This is a cross-sectional view of the internal structure of a blood sampler according to the present invention; Figure 3 This is a schematic diagram of the bottom structure of a blood sampler according to the present invention; Figure 4 This is a schematic diagram of the blood collection device structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of the structure of region B in the middle; Figure 6 This is a schematic diagram of the lifting isolation component structure of the present invention; Figure 7 For the present invention Figure 2 Enlarged view of the structure of region C in the middle; Figure 8 This is a schematic diagram of the puncture sampling device structure of the present invention; Figure 9 This is a schematic diagram of the pin control component of the present invention; Figure 10 For the present invention Figure 2 Enlarged view of the structure of region D in the middle.

[0019] In the diagram: 1. Blood collection component; 101. Blood collection tube; 1011. Stop ring; 102. Rubber pad; 103. Sealing cap; 1031. Connecting magnet; 2. Flow guide component; 201. Collection shell; 2011. Rubber stopper; 202. Drainage tube; 203. Expanding mask; 3. Lifting adjustment component; 301. Sliding sleeve; 3011. Outer magnet; 4. Lifting isolation component; 401. Lifting inner sleeve; 4011. Straw tube isolation groove; 402. Inner magnet; 5. Puncture sampling component; 501. Puncture connecting needle; 502. Catheter; 503. Protective rubber sleeve; 504. Puncture needle; 505. Switch; 6. Needle insertion control component; 601. Threaded sleeve; 602. Electromagnet; 603. Connecting spring; 604. Magnetic attractor. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1 to 10 As shown: This invention provides a technical solution: a blood sampler, including a blood collection component 1, a flow guide 2 installed inside the blood collection component 1 for guiding blood to the bottom of the blood collection component 1; a lifting adjustment component 3 sleeved on the blood collection component 1; a lifting isolation component 4 installed inside the blood collection component 1; the lifting isolation component 4 magnetically attracts the lifting adjustment component 3; a puncture sampling component 5 installed on the blood collection component 1; a needle control component 6 installed on the puncture sampling component 5; the needle control component 6 for controlling the reception of blood; the blood collection component 1 includes: a blood collection tube 101 and a stop ring 1011, the stop ring 1011 is fixedly installed inside the blood collection tube 101; the outside of the blood collection tube 101 is threaded.

[0022] The blood collection device 1 further includes: a rubber pad 102, a sealing cap 103, and a connecting magnet 1031. The rubber pad 102 is fixedly installed on the blood collection tube 101; the rubber pad 102 is a soft rubber structure; the sealing cap 103 is threaded onto the blood collection tube 101; the connecting magnet 1031 is fixedly installed on the sealing cap 103, and the connecting magnet 1031 and the sealing cap 103 are concentric; the sealing cap 103 has a through hole; the blood collection tube 101 is pre-stored with solvent; the blood collection tube 101 is a transparent plastic structure; the blood collection tube 101 has negative pressure; and a flow guide is included. 2 includes: a collection shell 201, a rubber stopper 2011, and a drainage tube 202. The collection shell 201 is fitted inside the blood collection tube 101; the collection shell 201 is slidably inserted into the stop ring 1011; the collection shell 201 has a sloping structure; a rubber stopper 2011 is fixedly installed on the top of the collection shell 201; the top edge of the rubber stopper 2011 is attached to the top of the blood collection tube 101; the inner side of the sealing cap 103 is pressed against the rubber stopper 2011; a drainage tube 202 is fixedly installed on the bottom of the collection shell 201, and the drainage tube 202 is located inside the blood collection tube 101; the rubber stopper 201... The central part is provided with a groove; the guide component 2 also includes: a dilator mask 203, which is fixedly installed at the bottom of the drainage tube 202, and the outer side of the dilator mask 203 has a sloping structure; the outer diameter of the dilator mask 203 is larger than the diameter of the drainage tube 202. The guide component 2 can be used to drain blood, so that the blood can be directly discharged from the anticoagulant at the bottom of the blood collection tube 101 during collection, ensuring the anticoagulant effect. When medical staff operate the blood collection tube, they do not need to keep the blood collection tube 101 completely vertical, but can hold it normally, avoiding the blood being discharged when the blood collection tube 101 is slightly tilted. First, the inner wall of the blood collection tube 101 is contacted. If the anticoagulant is not fully adhered to the inner wall of the blood collection tube 101, it is easy to cause residue to stick to the wall and not mix with the anticoagulant inside in time, resulting in clotting problems. The structure is simple and reasonable. The rubber pad 102 can be used to indicate the negative pressure inside the blood collection tube 101. When there is negative pressure inside the blood collection tube 101, the rubber pad 102 will be absorbed and indented by the negative pressure. Similarly, once the negative pressure disappears, the rubber pad 102 will no longer be indented and can elastically retract, which makes it easy for staff to directly understand and prevent the blood collection tube 101 from leaking and affecting blood collection.

[0023] The lifting adjustment component 3 includes a sliding sleeve 301 and an outer magnet 3011. The sliding sleeve 301 is slidably fitted onto the blood collection tube 101. Rubber rings are provided on both sides of the sliding sleeve 301, and the rubber rings on both sides of the sliding sleeve 301 elastically fit the blood collection tube 101. An outer magnet 3011 is fixedly installed on the inner side of the sliding sleeve 301, and the outer magnet 3011 is located on the outer side of the blood collection tube 101. The lifting isolation component 4 includes a lifting inner sleeve 401 and a suction tube isolation groove 4011. The lifting inner sleeve 401 is fitted onto the inner side of the blood collection tube 101. A through hole is provided in the middle of the lifting inner sleeve 401. The drainage tube 202 passes through the lifting inner sleeve 401. A groove is provided on the inner side of the top of the lifting inner sleeve 401. The straw isolation groove 4011 is used to fit the end of the straw; the through hole in the middle of the lifting inner sleeve 401 is provided with a rubber coating, and the rubber coating on the inner side of the lifting inner sleeve 401 is used to fit the expanding mask 203; the inner diameter of the through hole in the middle of the lifting inner sleeve 401 is the same as the outer diameter of the expanding mask 203; the lifting isolation component 4 also includes: an inner magnet 402, an inner magnet 402 is fixedly installed on the inner side of the lifting inner sleeve 401, and the inner magnet 402 magnetically attracts the outer magnet 3011; the outer magnet 3011 is used to magnetically attract and guide the lifting of the inner magnet 402. The lifting isolation component 4 is used in conjunction with the lifting adjustment component 3, and the lifting isolation component 4 can be adjusted by the lifting adjustment component 3 during blood collection. The manual lifting and lowering adjustment of the outer side of tube 101 allows for the use of the lifting isolation component 4. When lowered to the outside of the expanding mask 203, it can first block the anticoagulant at the bottom of the blood collection tube 101, facilitating the drainage of the anticoagulant to the inside of the drainage tube 202. This ensures that the anticoagulant adheres to the inner walls of the drainage tube 202 and the collection shell 201, preventing pre-clotting of blood during drainage and further guaranteeing the anticoagulant effect of this structure. Simultaneously, the smaller inner holes of the drainage tube 202 and the collection shell 201 facilitate more complete adhesion of the anticoagulant. Furthermore, the lifting isolation component 4 allows for direct blood sampling and separation even without anticoagulant. During the cleaning process, the pipette helps to isolate the clear liquid and the precipitate, preventing the pipette from being sucked in due to shaking during hand operation, which could interfere with the experiment. It can also help to stop and limit the movement of the pipette end. During normal anticoagulant blood collection, subsequent blood collection work can be carried out. If blood is collected and serum is separated directly without anticoagulant, after standing or centrifugation, after removing the rubber stopper 2011 and the drainage tube 202, the lifting inner sleeve 401 can be manually controlled to move down again. The movement is such that the through hole in the middle of the lifting inner sleeve 401 is exactly at the boundary between the clear liquid and the precipitate, which helps to stabilize the absorption of the clear liquid and is better suited for blood separation work without anticoagulant.

[0024] In Example 2, based on Example 1, the puncture sampling component 5 includes: a puncture connecting needle 501, a catheter 502, and a protective rubber sleeve 503. The puncture connecting needle 501 has threads; the end of the puncture connecting needle 501 has a needle tip; the protective rubber sleeve 503 is fixedly installed on the puncture connecting needle 501, and the protective rubber sleeve 503 is located outside the needle tip at the end of the puncture connecting needle 501; the catheter 502 is fixedly installed on the puncture connecting needle 501; the catheter 502 has a soft structure; the needle tip at the end of the puncture connecting needle 501 is used to puncture the protective rubber sleeve 503 and the rubber stopper 2011; the protective rubber sleeve 503 is used to insert into the groove on the rubber stopper 2011; the protective rubber sleeve 503... The sleeve 503 passes through the through hole provided on the closed cover 103; the puncture sampling component 5 also includes: a puncture needle 504 and a switch 505, the puncture needle 504 is fixedly installed at the end of the catheter 502; the end of the puncture needle 504 is provided with a needle tip; the puncture needle 504 is used to puncture blood vessels; the switch 505 is fixedly installed on the handle on the side of the puncture needle 504, and the puncture needle 504 is connected to the catheter 502; the needle insertion control component 6 includes: a threaded sleeve 601, an electromagnet 602, a connecting spring 603 and a magnetic attracting piece 604, the threaded sleeve 601 is threadedly connected to the puncture connecting needle 501; the electromagnet 602 is fixedly installed on the outside of the threaded sleeve 601, and the bottom of the electromagnet 602 is fixed. A connecting spring 603 is fixedly installed; a magnetic iron plate 604 is fixedly installed at the bottom of the connecting spring 603, and the magnetic iron plate 604 magnetically attracts the connecting magnet 1031; an electromagnet 602 is used to magnetically attract the connecting magnet 1031; the electromagnet 602 is connected in series with the switch 505 for power supply. Using the puncture sampling component 5 in conjunction with the needle insertion control component 6, it is convenient for staff to quickly control the timing of blood sampling. There is no need for staff to operate the hand-held puncture needle 504 to insert into the blood vessel with one hand, which requires keeping the hand-held puncture needle 504 stable, and operate the connecting puncture needle 501 to insert into the rubber stopper 2011 with the other hand, which is easy to cause needle stick injuries and the puncture connecting needle 501 is exposed for a long time. It is also easy to be contaminated by external bacteria such as desktops, and the operation is extremely cumbersome. Novices are very likely to fail to collect blood. This structure can realize direct electromagnetic control docking for blood collection after magnetic pre-installation. It ensures that medical staff can easily perform blood collection puncture before the puncture connecting needle 501 is inserted into the rubber stopper 2011. After the puncture needle 504 punctures the blood vessel and there is obvious bleeding, the sliding sleeve 301 is manually slid. The magnetic force of the outer magnet 3011 pulls the inner magnet 402 down, which drives the lifting inner sleeve 401 to move down. The puncture connecting needle 501 punctures the protective rubber sleeve 503 and the rubber stopper 2011. Under the negative pressure inside the blood collection tube 101, the blood can be drained through the drainage tube 202.

[0025] The working principle of this embodiment is as follows: First, by passing the protective sleeve 503 through the through hole provided on the closed cover 103, the magnetic iron piece 604 can be magnetically connected to the magnet 1031. This connection is temporary, and the doctor can directly hold the blood collection tube 101 without simultaneously holding the puncture needle 501. After the puncture needle 504 pierces the blood vessel and significant bleeding occurs, the sliding sleeve 301 is manually slid, and the outer magnet 3011 pulls the inner magnet 402 down, causing the lifting inner sleeve 401 to move down. The lifting inner sleeve 401 is then fitted onto the expanding mask 203, utilizing the middle part of the lifting inner sleeve 401. The inner diameter of the through-hole is the same as the outer diameter of the expanding mask 203, and they are fitted and sealed. At this time, the blood collection tube 101 can be inverted to promote the backflow of anticoagulant to the drainage tube 202 and the inside of the collection shell 201. Now, the sealing cap 103 on the blood collection tube 101 can be held with the sealing cap 103 facing upwards. Then, manually slide the sliding sleeve 301, using the magnetic force of the outer magnet 3011 to pull the inner magnet 402 upwards and reset it. At this time, the switch 505 can be manually pressed to control the electromagnet 602 to be energized, and the electromagnetic magnet 1031 is electromagnetically attracted. As the connecting magnet 1031 moves, the connecting spring 603 can be compressed, allowing the puncture connecting needle 501 to be inserted. By piercing the protective sleeve 503 and rubber stopper 2011, blood can be drained through the drainage tube 202 under negative pressure inside the blood collection tube 101. The blood collection is then completed by simply removing the puncture connecting needle 501. The blood discharged from the needle tip of the puncture connecting needle 501 is collected through the collection shell 201 and discharged from the bottom of the drainage tube 202. The drainage tube 202 can directly discharge the blood into the anticoagulant at the bottom of the blood collection tube 101 for mixing. During the process, medical personnel can hold the blood collection tube 101 normally. If subsequent aspiration using a medical suction tube is needed, the sealing cap 103 can be manually rotated and removed before use. Simply remove the rubber stopper 2011 and the drainage tube 202 with forceps. If blood is collected and serum is separated directly without anticoagulant, after standing or centrifugation, after removing the rubber stopper 2011 and the drainage tube 202, the lifting inner sleeve 401 can be manually lowered again until the through hole in the middle of the lifting inner sleeve 401 is exactly at the boundary between the clear liquid and the sediment. Use the elastic rubber rings on both sides of the sliding sleeve 301 to fit the blood collection tube 101 for stability. At this time, the doctor holds the moving suction tube with the end against the suction tube isolation groove 4011 to perform aspiration normally, preventing shaking and ensuring that only the clear liquid is absorbed.

[0026] 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.

[0027] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A blood sampler comprising a blood collection member (1) inside which a flow guide member (2) is installed, characterized in that: The flow guide (2) is used for guiding blood to the bottom of the blood collection device (1); the blood collection device (1) is sleeved with a lifting adjusting device (3); The blood collection device (1) is internally provided with a lifting isolation device (4); the lifting isolation device (4) is magnetically attracted to the lifting adjusting device (3); The blood collection device (1) is provided with a puncture sampling device (5); the puncture sampling device (5) is provided with a needle control device (6); the needle control device (6) is used for controlling the reception of blood; The blood collection device (1) comprises a blood collection tube (101) and a stop ring (1011), the stop ring (1011) is fixedly installed inside the blood collection tube (101); and the blood collection tube (101) is provided with threads on the outside.

2. A blood sampler according to claim 1, wherein: The blood collection device (1) further comprises a rubber pad (102), a sealing cover (103) and a connecting magnet (1031), the rubber pad (102) is fixedly installed on the blood collection tube (101); the rubber pad (102) is of a rubber soft structure; the sealing cover (103) is threadedly connected to the blood collection tube (101); the connecting magnet (1031) is fixedly installed on the sealing cover (103) and is concentric with the sealing cover (103); the sealing cover (103) is provided with a through hole; the blood collection tube (101) is pre-stored with a solvent inside; and the blood collection tube (101) is of a transparent plastic structure.

3. A blood sampler according to claim 2, wherein: The flow guide (2) comprises a collection shell (201), a rubber plug (2011) and a drainage tube (202), the collection shell (201) is sleeved inside the blood collection tube (101); the collection shell (201) is slidingly inserted into the stop ring (1011); the collection shell (201) is of a bevel structure; the rubber plug (2011) is fixedly installed on the top of the collection shell (201); the rubber plug (2011) is attached to the top of the blood collection tube (101); the rubber plug (2011) is extruded and attached to the inside of the sealing cover (103); the drainage tube (202) is fixedly installed at the bottom of the collection shell (201) and is located inside the blood collection tube (101); and a groove is formed in the middle of the rubber plug (2011).

4. A blood sampler according to claim 3, wherein: The flow guide (2) further comprises an expanding cover (203), the expanding cover (203) is fixedly installed at the bottom of the drainage tube (202) and is of a bevel structure on the outside; and the outer diameter of the expanding cover (203) is greater than the diameter of the drainage tube (202).

5. A blood sampler according to claim 4, wherein: The lifting adjusting device (3) comprises a sliding sleeve (301) and an outer magnet (3011), the sliding sleeve (301) is slidingly sleeved on the blood collection tube (101); rubber rings are respectively arranged on the two sides of the sliding sleeve (301) and elastically attached to the blood collection tube (101); and the outer magnet (3011) is fixedly installed on the inside of the sliding sleeve (301) and located on the outside of the blood collection tube (101).

6. A blood sampler according to claim 5, wherein: The lifting isolation piece (4) comprises a lifting inner sleeve (401) and a straw isolation groove (4011), the lifting inner sleeve (401) is sleeved on the inner side of the blood collection tube (101); the middle part of the lifting inner sleeve (401) is provided with a through hole; the drainage tube (202) passes through the lifting inner sleeve (401); the top inner side of the lifting inner sleeve (401) is provided with a straw isolation groove (4011); the straw isolation groove (4011) is used for fitting the end of the straw; the through hole in the middle part of the lifting inner sleeve (401) is provided with a rubber coating, and the rubber coating on the inner side of the lifting inner sleeve (401) is used for fitting the flared cover (203); the inner diameter of the through hole in the middle part of the lifting inner sleeve (401) is the same as the outer diameter of the flared cover (203).

7. A blood sampler according to claim 6, wherein: The lifting isolation piece (4) further comprises an inner magnet (402), the inner side of the lifting inner sleeve (401) is fixedly provided with the inner magnet (402), and the inner magnet (402) magnetically attracts the outer magnet (3011); the outer magnet (3011) is used for magnetically attracting the inner magnet (402) to lift.

8. A blood sampler according to claim 3, wherein: The puncture sampling piece (5) comprises a puncture connecting needle (501), a catheter (502) and a protective rubber sleeve (503), the puncture connecting needle (501) is provided with a thread; the end of the puncture connecting needle (501) is provided with a needle; the puncture connecting needle (501) is fixedly provided with the protective rubber sleeve (503), and the protective rubber sleeve (503) is located on the outer side of the needle provided on the end of the puncture connecting needle (501); the puncture connecting needle (501) is fixedly provided with the catheter (502); the catheter (502) is of soft structure; the needle at the end of the puncture connecting needle (501) is used for piercing the protective rubber sleeve (503) and the rubber plug (2011); the protective rubber sleeve (503) is used for being inserted into the groove on the rubber plug (2011); the protective rubber sleeve (503) passes through the through hole provided on the closure cover (103).

9. A blood sampler according to claim 8, wherein: The puncture sampling piece (5) further comprises a puncture needle (504) and a switch (505), the puncture needle (504) is fixedly installed at the end of the catheter (502); the end of the puncture needle (504) is provided with a needle; the puncture needle (504) is used for piercing the blood vessel; the switch (505) is fixedly installed on the handle on the side of the puncture needle (504), and the puncture needle (504) is communicated with the catheter (502).

10. A blood sampler according to claim 9, wherein: The needle control piece (6) comprises a threaded sleeve (601), an electromagnet (602), a connecting spring (603) and a magnetic iron sheet (604), the threaded sleeve (601) is threadedly connected on the puncture connecting needle (501); the outer side of the threaded sleeve (601) is fixedly provided with the electromagnet (602), and the bottom of the electromagnet (602) is fixedly provided with the connecting spring (603); the bottom end of the connecting spring (603) is fixedly provided with the magnetic iron sheet (604), and the magnetic iron sheet (604) magnetically attracts the magnet (1031); the electromagnet (602) is used for magnetically attracting the magnet (1031); the electromagnet (602) is connected with the switch (505) in series through the power supply.

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