CN114680887A - A kind of blood sampler for hepatology department and using method thereof - Google Patents

Abstract

The invention discloses a blood sampler for hepatology department and a method of using the same, and relates to the technical field of medical equipment. A protective tube is provided on the outside, and observation windows are provided on the sides of the protective tube and the blood collection tube. The protective tube is provided with a protective component. The heat preservation part for heat preservation and the clamping part for fixing the piston rod; the positioning block is fixedly connected with the outer surface of the blood collection tube; The invention is a blood sampler for hepatology department, which can protect the blood collection tube and the blood collection needle by setting the protective component, prevent the blood from being polluted, and at the same time prevent the blood collection needle from accidentally injuring the medical staff.

Description

A kind of blood sampler for hepatology department and using method thereof

technical field

The invention relates to the technical field of medical devices, in particular to a blood sampler for hepatology and a method of using the same.

Background technique

The kidney is an important organ of the human body. Its basic function is to generate urine to remove metabolites and certain wastes and toxins from the body, while retaining water and other useful substances through reabsorption. If there is a major disease in the kidneys, which affects the normal detoxification ability, and the blood urea nitrogen and creatinine levels are abnormal, dialysis treatment is required at this time. Among them, the liver disease department is a discipline that intersects with many departments, such as infectious diseases, gastroenterology. , Hepatobiliary surgery and general surgery, the content of diagnosis and treatment is both internal and external, covering a wide range. In the department of liver disease, medical staff often need to use blood samplers to sample and test the blood of patients.

Currently on the market, when patients in the liver department are treated with dialysis for kidney disease, it is generally necessary to collect blood samples from patients before and after dialysis to determine the effect of dialysis treatment, and some samples need to be reinfused after sampling. However, most of the syringe needles after sampling are directly exposed to the outside world, which can easily injure the medical staff and cause infection of the medical staff. At the same time, the syringe needles exposed to the outside world may be invaded by miscellaneous bacteria, which may cause damage during blood transfusion. Cross infection, for this reason, a blood sampler for hepatology department and a method for using the same are proposed.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a blood sampler for hepatology and a method of using the same, which can effectively solve the problem of the existing blood sampler in the background technology. Most of the syringe needles after sampling are directly exposed to the outside world and are easily injured. Medical staff, causing infection of medical staff, at the same time, the syringe needle exposed to the outside world may be invaded by miscellaneous bacteria, which may cause the problem of cross-infection during blood transfusion.

In order to achieve the above purpose, the technical scheme adopted by the present invention is: a blood sampler for hepatology department, comprising a blood collection tube, a piston rod arranged on the blood collection tube, and a blood collection needle arranged at the bottom of the blood collection tube, and the outer side of the blood collection tube is provided with a blood collection needle. There is a protective barrel, and a protective component is arranged on the protective barrel;

The protection assembly includes a positioning block, a stable part for fixing the blood collection tube, a heat preservation part and a clamping part for fixing the piston rod, and the positioning block is fixedly connected with the outer surface of the blood collection tube;

The inside of the blood collection tube is provided with a through hole, the stabilizing component includes a fixed block, a moving rod, a limit plate, a resistance spring and a clamping block that are fixedly arranged inside the through hole, and a cavity is opened inside the fixed block. The limit plate is movably arranged inside the cavity, one end of the moving rod is fixedly connected to one side of the limit plate, the other end of the moving rod extends outside the fixed block, and the resisting spring is sleeved on the outer surface of the moving rod , and one end of the resisting spring is fixedly connected to the side of the limit plate, the other end of the resisting spring is fixedly connected to the inner wall of the cavity, one end of the block is fixedly connected to the other side of the limit plate, and the The other end of the clamping block extends to the outside of the fixing block, and the side of the positioning block is provided with a clamping slot which is adapted to the clamping block, so as to facilitate the limiting and fixing of the blood collection tube;

The heat preservation component includes a heating rod, a heat dissipation layer and an anti-condensation box, an installation groove is opened inside the protective cylinder, the heating rod is arranged in the installation groove, the heat dissipation layer is fixedly connected with the inner wall of the protective cylinder, and the anti-coagulation layer The box is fixedly connected to the outer surface of the protective cylinder, and the anticoagulation box is communicated with the interior of the blood collection tube through a catheter, the anticoagulation box is filled with anticoagulant, and the catheter is provided with a valve, which is convenient to keep the blood warm, prevent blood clotting;

The clamping part includes a fixing ring, an adjusting screw and a clamping plate, the fixing ring is fixedly connected to the top of the protective cylinder, the adjusting screw penetrates through the interior of the fixing ring, and the adjusting screw is threadedly connected to the interior of the fixing ring, and the One end of the adjusting screw located on the inner side of the fixing ring is movably connected with the clamping plate, which is convenient for fixing the piston rod, preventing accidental touch and causing blood loss.

Preferably, the number of the stabilizing components is four groups, and the four groups of the stabilizing components are symmetrically distributed on the protective tube, which is convenient for fixing the position of the blood collection tube.

Preferably, a clamping spring is sleeved on the outer surface of the adjusting screw on the inner side of the fixing ring, one end of the clamping spring is fixedly connected to the side surface of the clamping plate, and the other end of the clamping spring is connected to the inner side wall of the fixing ring. Fixed connection, easy to hold the clamping plate against the surface of the piston rod.

Preferably, there are two groups of the clamping members, and the two groups of the clamping members are symmetrically distributed along the vertical center axis of the protective cylinder, and can synchronously fix the piston rod.

Preferably, a rubber anti-skid pad is provided on the side of the clamping plate away from the adjusting screw, and the surface of the rubber anti-skid pad is provided with bumps, which can increase the friction between the clamping plate and the piston rod and prevent mutual sliding.

Preferably, the inner wall of the protective tube is fixedly connected with a limit slide rail, and the outer surface of the blood collection tube is fixedly connected with a limit bar matched with the limit slide rail, so as to limit the position of the blood collection tube.

Preferably, the inner bottom wall of the protective tube is fixedly connected with a limit tube for limiting the blood collection needle, the inner wall of the limit tube is provided with sterile cotton, and the bottom of the protective tube is provided with a limit tube for the blood collection needle to perform The mobile mobile channel is convenient for timely disinfection and limiting of the blood collection needle.

Preferably, the specific steps are as follows:

S1. Insert the blood collection needle into the blood vessel of the patient, draw blood by pulling the piston rod, and collect the required blood volume to complete the blood sampling;

S2. By pulling the moving rod of the stable part located under the side of the protective cylinder, the moving rod drives the limit plate and the clamping block to move, so that the clamping block is detached from the groove of the positioning block, and the blood collection tube can be released. ;

S3. By pulling the blood collection tube upward, the limit bar on the blood collection tube can be moved in the limit slide rail, and the blood collection needle is stored in the protective tube until it moves to the position of the stable member above the side of the protective tube;

S4. By pulling the moving rod of the stable part located above the side of the protective cylinder, the moving rod drives the limit plate and the block connected to it to move. At this time, the contact spring is in a compressed state, and then move the blood collection tube position, loosen the movement rod, so that the moving rod drives the clamping block to engage with the clamping groove on the positioning block under the reset action of the conflicting spring, so as to complete the fixation of the blood collection tube;

S5. By rotating the adjusting screw, the adjusting screw can drive the clamping plate to move to the inside of the fixing ring until the clamping plate can contact the outer surface of the piston rod, then the piston rod can be fixed to prevent accidental touch and blood loss. ;

S6. Open the valve so that the anticoagulant in the anticoagulation box can enter the blood collection tube, and at the same time start the heating rod, so that the heating rod can be heated at a constant temperature, and then transmit the heat to the blood collection tube through the heat dissipation layer to prevent blood coagulation.

Compared with the prior art, the present invention has the following beneficial effects:

1. In the present invention, by setting a protective tube, the blood collection tube and the blood collection needle can be protected to avoid external bacterial contamination, and at the same time, the blood collection needle can be prevented from accidentally injuring medical staff in the outside world.

2. In the present invention, after the blood collection is completed, by setting the stable part, firstly, by pulling the moving rod of the stable part located under the side of the protective cylinder, the moving rod drives the limit plate and the clamping block connected to it to move, so that the card is moved. The block is released from the groove of the positioning block, and the blood collection tube can be released. After that, by pulling the blood collection tube upward, the limit bar on the blood collection tube can move in the limit slide rail, and the blood collection needle is stored in the protective cylinder. , until it moves to the position of the stable part above the side of the protective cylinder, and finally, by pulling the moving rod of the stable part above the side of the protective cylinder, the moving rod drives the limit plate and the block connected to it to move. In the compressed state, move the blood collection tube position again, release the moving rod, so that under the reset action of the conflicting spring, the moving rod drives the clamping block to engage with the clamping groove on the positioning block, and the fixing of the blood collection tube can be completed. It can prevent the blood from being polluted in the air, and at the same time, it can avoid accidental injury of medical staff.

3. In the present invention, by setting the thermal insulation component, after the blood collection tube and the blood collection needle are stored in the protective tube, the valve is opened, so that the anticoagulant in the anticoagulation box can enter the blood collection tube, and the heating rod is activated at the same time, so that the heating rod It can be heated at a constant temperature, and then the heat is transferred to the blood collection tube through the heat dissipation layer to prevent blood coagulation and improve the accuracy of blood testing.

Description of drawings

1 is a perspective view of the overall structure of a blood sampler for hepatology of the present invention;

Fig. 2 is a front sectional view of a blood sampler for hepatology of the present invention;

Fig. 3 is an enlarged view of the structure of the blood sampler for hepatology department in Fig. 2 of the present invention;

Fig. 4 is an enlarged view of the structure at B in Fig. 2 of a blood sampler for hepatology of the present invention;

Fig. 5 is an enlarged view of the structure at C in Fig. 2 of a blood sampler for hepatology of the present invention;

FIG. 6 is an enlarged view of the structure at D in FIG. 2 of a blood sampler for hepatology of the present invention;

Fig. 7 is a top sectional view of a blood sampler for hepatology of the present invention;

Fig. 8 is an enlarged view of the structure at E in Fig. 7 of a blood sampler for hepatology of the present invention.

In the figure: 1. Blood collection tube; 2. Piston rod; 3. Blood collection needle; 4. Protective cylinder; 5. Positioning block; 6. Fixed block; 7. Moving rod; , clamping block; 11, heating rod; 12, heat dissipation layer; 13, anti-coagulation box; 14, fixing ring; 15, adjusting screw; 16, clamping plate; 17, clamping spring; 18, rubber anti-skid pad; 19, Limiting slide rail; 20. Limiting strip; 21. Limiting cylinder; 22. Disinfecting cotton.

Detailed ways

In order to make the technical means, creative features, achievement goals and effects realized by the present invention easy to understand, the present invention will be further described below with reference to the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end" and "the other end" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, with a specific orientation. The orientation configuration and operation are therefore not to be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense, for example, "connected" may be a fixed connection It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

1-8, the present invention is a blood sampler for hepatology, including a blood collection tube 1, a piston rod 2 arranged on the blood collection tube 1, and a blood collection needle 3 arranged at the bottom of the blood collection tube 1. A protective tube 4 is provided on the outside of the blood collection tube 1, and a protective assembly is provided on the protective tube 4;

The protective assembly includes a positioning block 5, a stable part for fixing the blood collection tube 1, a heat preservation part and a clamping part for fixing the piston rod 2, and the positioning block 5 is fixedly connected with the outer surface of the blood collection tube 1;

The inside of the blood collection tube 1 is provided with a through hole, and the stable component includes a fixed block 6, a moving rod 7, a limit plate 8, a resistance spring 9 and a clamping block 10 that are fixedly arranged inside the through hole. A cavity is opened, the limit plate 8 is movably arranged inside the cavity, one end of the moving rod 7 is fixedly connected to one side of the limit plate 8, and the other end of the moving rod 7 extends outside the fixed block 6 , the resistance spring 9 is sleeved on the outer surface of the moving rod 7, and one end of the resistance spring 9 is fixedly connected with the side surface of the limit plate 8, and the other end of the resistance spring 9 is fixedly connected with the inner wall of the cavity. One end of the clamping block 10 is fixedly connected to the other side of the limiting plate 8 , the other end of the clamping block 10 extends to the outside of the fixing block 6 , and the side of the positioning block 5 is provided with a clamping slot which is adapted to the clamping block 10 . , it is convenient to limit and fix the blood collection tube 1;

The thermal insulation component includes a heating rod 11, a heat dissipation layer 12 and an anti-condensation box 13. An installation groove is opened inside the protective cylinder 4. The heating rod 11 is arranged in the installation groove. The heat dissipation layer 12 is fixedly connected to the inner wall of the protective cylinder 4. The outer surface of the protective tube 4 is fixedly connected, and the anticoagulation box 13 is communicated with the interior of the blood collection tube 1 through the catheter. The anticoagulation box 13 contains anticoagulant, and the catheter is provided with a valve, which is convenient to keep the blood warm and prevent blood solidification;

The clamping part includes a fixing ring 14, an adjusting screw 15 and a clamping plate 16. The fixing ring 14 is fixedly connected to the top of the protective cylinder 4, the adjusting screw 15 penetrates the interior of the fixing ring 14, and the adjusting screw 15 is connected with the inner thread of the fixing ring 14. One end of the screw rod 15 located inside the fixing ring 14 is movably connected with the clamping plate 16 , which facilitates the fixing of the piston rod 2 and prevents accidental touch and blood loss.

The number of stabilizing components is four groups, and the four groups of stabilizing components are symmetrically distributed on the protective tube 4 , which is convenient for fixing the position of the blood collection tube 1 .

A clamping spring 17 is sleeved on the outer surface of the adjusting screw 15 on the inner side of the fixing ring 14 . , it is convenient for the clamping plate 16 to be in close contact with the surface of the piston rod 2 .

There are two sets of clamping components, and the two sets of clamping components are symmetrically distributed along the vertical center axis of the protective cylinder 4 , which can synchronously fix the piston rod 2 .

A rubber anti-skid pad 18 is provided on the side of the clamping plate 16 away from the adjusting screw 15 . The surface of the rubber anti-skid pad 18 is provided with bumps, which can increase the friction between the clamping plate 16 and the piston rod 2 and prevent mutual sliding.

The inner wall of the protective tube 4 is fixedly connected with the limit slide rail 19 , and the outer surface of the blood collection tube 1 is fixedly connected with a limit bar 20 adapted to the limit slide rail 19 , so as to limit the position of the blood collection tube 1 .

The inner bottom wall of the protective tube 4 is fixedly connected with a limit tube 21 for limiting the blood collection needle 3, the inner wall of the limit tube 21 is provided with a sterile cotton 22, and the bottom of the protective tube 4 is provided with a spacer for the blood collection needle 3 to move. The moving channel facilitates timely disinfection and position limit of the blood collection needle 3 .

Specific steps are as follows:

S1. Insert the blood collection needle 3 into the blood vessel of the patient, draw blood by pulling the piston rod 2, and collect the required blood volume to complete the blood sampling;

S2. By pulling the moving rod 7 of the stable member located under the side of the protective cylinder 4, the moving rod 7 drives the limit plate 8 and the clamping block 10 to move, thereby removing the clamping block 10 from the clamping slot of the positioning block 5. detached, the blood collection tube 1 can be released;

S3. By pulling the blood collection tube 1 upward, the limit bar 20 on the blood collection tube 1 can be moved in the limit slide rail 19, and the blood collection needle 3 is stored in the protective tube 4 until it moves to the upper side of the protective tube 4. position of stabilized components;

S4. By pulling the moving rod 7 of the stable part located above the side of the protective cylinder 4, the moving rod 7 drives the limit plate 8 and the clamping block 10 that it is connected to move, and the abutting spring 9 is in a compressed state at this time, and then move the At the position of blood vessel 1, loosen the moving rod 7, so that the moving rod 7 drives the clamping block 10 to engage with the clamping groove on the positioning block 5 under the reset action of the conflicting spring 9, and the fixation of the blood collection tube 1 can be completed;

S5. By rotating the adjusting screw 15, the adjusting screw 15 can drive the clamping plate 16 to move toward the inner side of the fixing ring 14 until the clamping plate 16 can contact the outer surface of the piston rod 2, and the fixing of the piston rod 2 can be completed. Prevent accidental touch and cause blood loss;

S6. Open the valve, so that the anticoagulant in the anticoagulation box 13 can enter the blood collection tube 1, and at the same time start the heating rod 11, so that the heating rod 11 can be heated at a constant temperature, and then the heat is transferred to the blood collection tube 1 through the heat dissipation layer 12, Prevent blood from clotting.

The working principle of the present invention is as follows: when in use, first, insert the blood collection needle 3 into the blood vessel of the patient, draw blood by pulling the piston rod 2, and collect the required blood volume to complete the blood sampling, and then pull the blood sampling needle located on the side of the protective tube 4 by pulling The moving rod 7 of the lower stable part makes the moving rod 7 drive the limit plate 8 and the clamping block 10 to move, so that the clamping block 10 is detached from the clamping groove of the positioning block 5, and the blood collection tube 1 can be released. Then, by pulling the blood collection tube 1 upward, the limit bar 20 on the blood collection tube 1 can be moved in the limit slide rail 19, and the blood collection needle 3 is stored in the protective tube 4 until it moves to a stable position above the side of the protective tube 4. The position of the component, then, by pulling the moving rod 7 of the stable component located above the side of the protective cylinder 4, the moving rod 7 drives the limit plate 8 and the clamping block 10 connected to it to move, at this time the resistance spring 9 is in a compressed state , and then move the blood collection tube 1 position, release the moving rod 7, so that the moving rod 7 drives the clamping block 10 to engage with the clamping groove on the positioning block 5 under the reset action of the conflicting spring 9, and the blood collection tube 1 can be completed. Then, by rotating the adjusting screw 15, the adjusting screw 15 can drive the clamping plate 16 to move to the inner side of the fixing ring 14 until the clamping plate 16 can contact the outer surface of the piston rod 2, and the adjustment of the piston rod 2 can be completed. Fix, and finally, open the valve so that the anticoagulant in the anticoagulation box 13 can enter the blood collection tube 1, and at the same time start the heating rod 11, so that the heating rod 11 can be heated at a constant temperature, and then the heat is transferred to the blood collection tube through the heat dissipation layer 12. 1. Prevent blood coagulation.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (9)

1. The utility model provides a liver disease branch of academic or vocational study is with blood sampler, includes heparin tube (1), piston rod (2) of setting on heparin tube (1), sets up blood sampling syringe needle (3) in heparin tube (1) bottom, its characterized in that: a protective barrel (4) is arranged on the outer side of the blood collection tube (1), and a protective assembly is arranged on the protective barrel (4);

the protective assembly comprises a positioning block (5), a fixing part for fixing the blood collection tube (1), a heat preservation part and a clamping part for fixing the piston pull rod (2), and the positioning block (5) is fixedly connected with the outer surface of the blood collection tube (1);

the blood collection tube (1) is internally provided with a through hole, the stabilizing part comprises a fixing block (6), a moving rod (7), a limiting plate (8), a collision spring (9) and a clamping block (10) which are fixedly arranged in the through hole, the fixing block (6) is internally provided with a cavity, the limiting plate (8) is movably arranged in the cavity, one end of the moving rod (7) is fixedly connected with one side of the limiting plate (8), the other end of the moving rod (7) extends out of the fixing block (6), the collision spring (9) is sleeved on the outer surface of the moving rod (7), one end of the collision spring (9) is fixedly connected with the side surface of the limiting plate (8), the other end of the collision spring (9) is fixedly connected with the inner wall of the cavity, one end of the clamping block (10) is fixedly connected with the other side of the limiting plate (8), and the other end of the clamping block (10) extends out of the fixing block (6), a clamping groove matched with the clamping block (10) is formed in the side surface of the positioning block (5);

the heat preservation part includes heating rod (11), heat dissipation layer (12) and anti-coagulation case (13), the mounting groove has been seted up to protection section of thick bamboo (4) inside, heating rod (11) set up in the mounting groove, heat dissipation layer (12) and protection section of thick bamboo (4) inner wall fixed connection, anti-coagulation case (13) and protection section of thick bamboo (4) surface fixed connection, just anti-coagulation case (13) are through pipe and the inside intercommunication of heparin tube (1).

2. The liver disease department blood sampler according to claim 1, wherein: the number of the stabilizing components is four, and the four stabilizing components are symmetrically distributed on the protective cylinder (4).

3. The liver disease department blood sampler according to claim 1, wherein: the clamping part comprises a fixing ring (14), an adjusting screw rod (15) and a clamping plate (16), the fixing ring (14) is fixedly connected with the top of the protective cylinder (4), the adjusting screw rod (15) penetrates through the inside of the fixing ring (14), the adjusting screw rod (15) is connected with the inner thread of the fixing ring (14), and the adjusting screw rod (15) is located at the inner end of the fixing ring (14) and movably connected with the clamping plate (16).

4. The liver disease department blood sampler according to claim 3, wherein: adjusting screw (15) are located the inboard surface cover of solid fixed ring (14) and are equipped with clamping spring (17), the one end and grip block (16) side fixed connection of clamping spring (17), the other end of clamping spring (17) and the inside wall fixed connection of solid fixed ring (14).

5. The liver disease department blood sampler according to claim 1, wherein: the number of the clamping components is two, and the two groups of the clamping components are symmetrically distributed along the vertical central axis of the protective cylinder (4).

6. The liver disease department blood sampler according to claim 3, wherein: one side of the clamping plate (16) far away from the adjusting screw rod (15) is provided with a rubber anti-skid pad (18), and salient points are arranged on the surface of the rubber anti-skid pad (18).

7. The liver disease department blood sampler according to claim 1, wherein: the inner wall fixedly connected with of a protection section of thick bamboo (4) spacing slide rail (19), the surface fixedly connected with of heparin tube (1) and spacing strip (20) of spacing slide rail (19) looks adaptation.

8. The liver disease department blood sampler according to claim 1, wherein: the inner bottom wall of the protective cylinder (4) is fixedly connected with a limiting cylinder (21) used for limiting the blood sampling needle head (3), the inner wall of the limiting cylinder (21) is provided with sterilized cotton (22), and the bottom of the protective cylinder (4) is provided with a moving through groove used for moving the blood sampling needle head (3).

9. The use method of the blood sampler for hepatopathy department as claimed in claim 1, wherein: the method comprises the following specific steps:

s1, inserting a blood sampling needle (3) into a blood vessel of a patient, drawing blood by pulling a piston pull rod (2), and collecting the required blood volume to finish blood sampling;

s2, pulling a moving rod (7) of a stabilizing part located below the side face of the protective cylinder (4), so that the moving rod (7) drives a limiting plate (8) and a clamping block (10) connected with the moving rod to move, the clamping block (10) is separated from a clamping groove of a positioning block (5), and the blood sampling tube (1) can be released;

s3, the blood sampling tube (1) is pulled upwards, so that a limiting strip (20) on the blood sampling tube (1) can move in a limiting sliding rail (19), and a blood sampling needle head (3) is accommodated in the protective cylinder (4) until the blood sampling needle head moves to the position of the stabilizing part above the side face of the protective cylinder (4);

s4, a moving rod (7) of a stabilizing part located above the side face of the protective cylinder (4) is pulled, so that the moving rod (7) drives a limiting plate (8) and a clamping block (10) which are connected with the moving rod to move, the abutting spring (9) is in a compressed state at the moment, the position of the blood collection tube (1) is moved, the moving rod (7) is loosened, the moving rod (7) drives the clamping block (10) to be clamped with a clamping groove in the positioning block (5) under the reset action of the abutting spring (9), and then the blood collection tube (1) can be fixed;

s5, the adjusting screw (15) is rotated, so that the adjusting screw (15) can drive the clamping plate (16) to move towards the inner side of the fixing ring (14) until the clamping plate (16) can be in contact with the outer surface of the piston pull rod (2), the piston pull rod (2) can be fixed, and the phenomenon that blood is lost due to mistaken collision is avoided;

s6, opening the valve, enabling the anticoagulant in the anticoagulant box (13) to enter the blood collection tube (1), simultaneously starting the heating rod (11), enabling the heating rod (11) to heat at a constant temperature, and then transmitting heat to the blood collection tube (1) through the heat dissipation layer (12) to prevent blood from coagulating.

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