Blood sampling device and use method thereof

Abstract

The blood sampling device comprises a vacuum blood sampling assembly, the vacuum blood sampling assembly comprises a vacuum blood sampling tube and a piston, one end of the vacuum blood sampling tube is provided with a blood sampling opening part, the piston is located in the blood sampling opening part, and the piston is in sealed connection with the inner wall of the vacuum blood sampling tube; the piston can move in the vacuum blood collection tube; the transfer assembly comprises a boosting tube and a driving needle, the driving needle is located in the boosting tube, one end of the driving needle is provided with a needle head, the other end of the driving needle is provided with a connector, the needle head is communicated with the connector, and the needle head can penetrate through the piston and then is communicated with the interior of the vacuum blood collection tube. According to the blood sampling device, due to the fact that the vacuum blood sampling assembly and the transferring assembly are arranged, after the vacuum blood sampling assembly is used for sampling blood, the blood collected by the vacuum blood sampling assembly can be transferred into other containers through the transferring assembly, a piston in the vacuum blood sampling pipe does not need to be opened in the transferring process, blood exposure is avoided, and the blood sampling efficiency is improved. And the risk that blood is polluted is reduced.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a blood collection device and a method of using the same. Background Art

[0002] In the process of using the platelet-rich plasma preparation device, it is necessary to collect blood from the patient and then transfer the collected blood into the platelet-rich plasma preparation device. Currently, vacuum blood collection tubes are generally used for blood collection.

[0003] After using a vacuum blood collection tube to collect blood, the rubber stopper in the blood collection tube needs to be opened during the transfer process, and the blood needs to be drawn with a syringe needle and then injected into the platelet-rich plasma preparation device. During this process, the blood is exposed and there is a risk of contamination. Summary of the invention

[0004] The embodiment of the present application provides a blood sampling device and a method of using the same to solve the problems existing in the related art. The technical solution is as follows:

[0005] In a first aspect, an embodiment of the present application provides a blood sampling device, comprising:

[0006] A vacuum blood collection assembly, comprising a vacuum blood collection tube and a piston, wherein one end of the vacuum blood collection tube has a blood collection opening, the piston is located inside the blood collection opening, the piston is sealed and connected to the inner wall of the vacuum blood collection tube, and the piston can move inside the vacuum blood collection tube;

[0007] The transfer assembly includes a booster tube and a driving needle. The driving needle is located inside the booster tube. One end of the driving needle has a needle and the other end of the driving needle has a connecting joint. The needle is connected to the connecting joint and can pierce the piston to connect to the inside of the vacuum blood collection tube.

[0008] In one embodiment, the vacuum blood collection assembly further comprises:

[0009] The tube cover is sleeved on one end of the vacuum blood collection tube. The tube cover is detachably connected to the piston. After the piston is separated from the tube cover, the piston can move inside the vacuum blood collection tube in a direction away from the tube cover. A first through hole is provided in the middle of the tube cover.

[0010] In one embodiment, a fixed block and a deformable block are provided in the middle of the tube cover, the deformable block is connected to the fixed block, a clamping strip is provided on the outer circumference of the deformable block, a clamping groove is provided on the piston, the clamping groove matches the clamping strip, and the deformable block is made of elastic material.

[0011] In one embodiment, there are two deformable blocks, the two deformable blocks are axially symmetrically arranged, a deformable groove is provided between the ends of the two deformable blocks, and the fixing blocks are respectively connected to the two deformable blocks.

[0012] In one embodiment, there is a gap between the fixed block and the deformable block, a connecting piece is provided in the gap, and the fixed block and the deformable block are connected through the connecting piece; a second through hole is provided in the middle of the fixed block, and the first through hole is connected to the second through hole.

[0013] In one embodiment, the diameter of the driving needle is smaller than the inner diameter of the deformable block, and the diameter of the driving needle is larger than the inner diameter of the fixed block.

[0014] In one embodiment, the booster tube has a booster opening at one end close to the needle, and the vacuum blood collection tube can enter the booster tube through the booster opening.

[0015] In one embodiment, the connecting joint protrudes from the other end of the booster tube, the connecting joint is threadedly connected to the other end of the booster tube, an exhaust hole is provided at the other end of the booster tube, and a pick is provided at the end of the booster tube close to the needle.

[0016] In one embodiment, the transfer assembly further includes an upper cover and a lower cover, wherein the upper cover is movably connected to the driving needle, and the upper cover wraps the needle head therein; and the lower cover is detachably connected to the connecting joint, and the lower cover wraps the connecting joint therein.

[0017] In a second aspect, an embodiment of the present application provides a method for using a blood collection device, the method for using the blood collection device being applied to any of the above-mentioned blood collection devices, and the method for using the blood collection device comprising the following steps:

[0018] The blood collection needle is inserted into the piston and connected to the inside of the vacuum blood collection tube, and the negative pressure in the vacuum blood collection tube is used to collect blood;

[0019] After the blood collection is completed, the blood collection needle is pulled out from the piston, and the vacuum blood collection tube is placed on one side of the driving needle. The needle tip of the driving needle pierces the piston and communicates with the inside of the vacuum blood collection tube, and an injection needle or an infusion needle is connected to the connecting joint;

[0020] The vacuum blood collection tube is pressed. During the pressing process, the driving needle pushes the piston to move inside the blood collection tube. The blood collected inside the vacuum blood collection tube is transported to the injection needle or infusion needle through the driving needle, and then transferred to the container through the injection needle or infusion needle.

[0021] The advantages or beneficial effects of the above technical solution include at least:

[0022] The blood collection device of the embodiment of the present application includes a vacuum blood collection component and a transfer component. The vacuum blood collection component includes a vacuum blood collection tube and a piston. The piston is sealed and connected to the inner wall of the vacuum blood collection tube, and the piston can move inside the vacuum blood collection tube. The transfer component includes a booster tube and a drive needle. The drive needle is located inside the booster tube, and one end of the drive needle has a needle head, and the other end of the drive needle has a connecting joint. When the blood collection device of the embodiment of the present application is in use, the vacuum blood collection tube can be pre-installed with an anticoagulant. When blood is collected from a patient, the blood collection needle is inserted into the piston and connected to the inside of the vacuum blood collection tube, and the negative pressure inside the vacuum blood collection tube is used for blood collection. After the blood collection is completed, the blood collection needle is pulled out from the piston, and then the vacuum blood collection tube is placed on one side of the drive needle. The needle head of the drive needle pierces the piston and connects to the inside of the vacuum blood collection tube, and an injection needle or an infusion needle is connected to the connecting joint, and then the needle head of the injection needle or the infusion needle is inserted into the container. Then, the vacuum blood collection tube is pressed. During the pressing process, the piston is pushed to move inside the blood collection tube by the driving needle. The blood collected inside the vacuum blood collection tube is transported to the injection needle or the infusion needle by the driving needle, and then transferred to the container by the injection needle or the infusion needle. Since the blood collection device of the embodiment of the present application is provided with a vacuum blood collection component and a transfer component, after blood is collected using the vacuum blood collection component, the blood collected by the vacuum blood collection component can be transferred to other containers through the transfer component. During the transfer process, there is no need to open the piston in the vacuum blood collection tube, thereby avoiding blood leakage and reducing the risk of blood contamination.

[0023] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0025] Figure 1 is a cross-sectional view of a blood collection device;

[0026] Figure 2 It is a schematic diagram of the structure of the vacuum blood collection component;

[0027] Figure 3 is a cross-sectional view of a vacuum blood collection assembly;

[0028] Figure 4 An exploded view of the vacuum blood collection assembly;

[0029] Figure 5is a schematic diagram of the structure of the tube cover;

[0030] Figure 6 It is a schematic diagram of the structure of the piston;

[0031] Figure 7 is a cross-sectional view of a transfer assembly;

[0032] Figure 8 An exploded view of the transfer assembly;

[0033] Fig. 9 It is a schematic diagram of the use status of the blood sampling device;

[0034] Fig.10 is a schematic diagram of another use state of the blood sampling device;

[0035] 1. Vacuum blood collection component; 2. Transfer component; 11. Vacuum blood collection tube; 12. Piston; 13. Blood collection opening; 21. Booster tube; 22. Drive needle; 221. Needle; 222. Connector; 14. Tube cover; 141. First through hole; 15. Fixing block; 16. Deformation block; 161. Card strip; 121. Card slot; 162. Deformation slot; 17. Connector; 151. Second through hole; 122. Liquid collecting tank; 123. Groove; 211. Booster opening; 212. Exhaust hole; 213. Pick; 23. Upper cover; 24. Lower cover; 231. Needle sleeve; 232. Limiting convex part; 233. Limiting slot; 241. Protective seat; 242. Protective slot; 3. Injection needle. DETAILED DESCRIPTION

[0036] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0037] Embodiment 1:

[0038] like Figures 1 to 10 As shown, the embodiment of the present application provides a blood collection device, including a vacuum blood collection component 1 and a transfer component 2. The vacuum blood collection component 1 includes a vacuum blood collection tube 11 and a piston 12. One end of the vacuum blood collection tube 11 has a blood collection opening 13. The piston 12 is located inside the blood collection opening 13. The piston 12 is sealed and connected to the inner wall of the vacuum blood collection tube 11. The piston 12 can move inside the vacuum blood collection tube 11. The transfer component 2 includes a booster tube 21 and a drive needle 22. The drive needle 22 is located inside the booster tube 21. One end of the drive needle 22 has a needle 221. The other end of the drive needle 22 has a connecting joint 222. The needle 221 is connected to the connecting joint 222. The needle 221 can pierce the piston 12 and connect to the inside of the vacuum blood collection tube 11.

[0039] When the blood collection device of the embodiment of the present application is in use, the vacuum blood collection tube 11 may be pre-loaded with an anticoagulant. When collecting blood from a patient, the blood collection needle is inserted into the piston 12 and connected to the inside of the vacuum blood collection tube 11, and the negative pressure inside the vacuum blood collection tube 11 is used to collect blood. After the blood collection is completed, the blood collection needle is pulled out from the piston 12, and then the vacuum blood collection tube 11 is placed on one side of the driving needle 22, and the needle head 221 of the driving needle 22 pierces the piston 12 and connects to the inside of the vacuum blood collection tube 11, and the injection needle 3 or the infusion needle is connected to the connecting joint 222, and then the needle head 221 of the injection needle 3 or the infusion needle is inserted into the container. Then, the vacuum blood collection tube 11 is pressed, and in the process of pressing the vacuum blood collection tube 11, the piston 12 is pushed to move inside the blood collection tube by the driving needle 22, and the blood collected inside the vacuum blood collection tube 11 is transported to the injection needle 3 or the infusion needle through the driving needle 22, and transferred to the container through the injection needle 3 or the infusion needle. Since the blood collection device of the embodiment of the present application is provided with a vacuum blood collection component 1 and a transfer component 2, after blood is collected using the vacuum blood collection component 1, the blood collected by the vacuum blood collection component 1 can be transferred to other containers through the transfer component 2. During the transfer process, there is no need to open the piston 12 in the vacuum blood collection tube 11, thereby avoiding leakage of blood and reducing the risk of blood contamination.

[0040] Since the vacuum blood collection assembly 1 includes a vacuum blood collection tube 11 and a piston 12, the interior of the vacuum blood collection tube 11 can be sealed by the piston 12, so that the interior of the vacuum blood collection tube 11 is in a sealed state. Using the vacuum blood collection tube 11 for negative pressure blood collection is convenient and quick, which can reduce the blood collection time and improve the patient's blood collection experience. In one embodiment, the piston 12 can be interference fit with the vacuum blood collection tube 11, so as to achieve a sealed connection between the piston 12 and the vacuum blood collection tube 11.

[0041] In one embodiment, the vacuum blood collection assembly 1 further includes a tube cover 14, which is sleeved on one end of the vacuum blood collection tube 11, and the tube cover 14 is detachably connected to the piston 12. After the piston 12 is separated from the tube cover 14, the piston 12 can move in the vacuum blood collection tube 11 in a direction away from the tube cover 14. The tube cover 14 has a first through hole 141 in the middle, and since the tube cover 14 has the first through hole 141 in the middle, the blood collection needle and the needle 221 can be inserted into the piston 12 through the first through hole 141.

[0042] In order to realize the detachable connection between the pipe cover 14 and the piston 12, a fixing block 15 and a deformation block 16 are provided in the middle of the pipe cover 14. The deformation block 16 is connected to the fixing block 15, and a clamping strip 161 is provided on the outer circumference of the deformation block 16. The piston 12 is provided with a clamping groove 121, and the clamping groove 121 matches the clamping strip 161. The deformation block 16 is made of elastic material. Preferably, the deformation block 16 and the pipe cover 14 can be made of elastic material, and the elastic material can be made of silicone, rubber or plastic.

[0043] In one embodiment, the deformation block 16 and the tube cover 14 can be integrally formed, and the deformation block 16 and the tube cover 14 can also be connected together by bonding, etc. The deformation block 16 also has a first through hole 141 in the middle, and the fixing block 15 is located inside the first through hole 141 .

[0044] In one embodiment, there are two deformable blocks 16, which are axially symmetrically arranged, and a deformation groove 162 is provided between the ends of the two deformable blocks 16, and the fixing block 15 is respectively connected to the two deformable blocks 16. When the two deformable blocks 16 are squeezed by external force, the two deformable blocks 16 can be deformed to move closer to each other. Preferably, the cross-sections of the two deformable blocks 16 are semicircular structures.

[0045] In order to realize the connection between the fixed block 15 and the deformable block 16, there is a gap between the fixed block 15 and the deformable block 16, and a connecting member 17 is arranged in the gap, and the fixed block 15 and the deformable block 16 are connected by the connecting member 17. Preferably, there are four connecting members 17, and adjacent connecting members 17 are arranged at intervals. The fixed block 15 is connected to one of the deformable blocks 16 through two of the connecting members 17, and the fixed block 15 is connected to the other deformable block 16 through the other two connecting members 17. A second through hole 151 is provided in the middle of the fixed block 15, and the first through hole 141 is connected to the second through hole 151.

[0046] Since the fixing block 15 and the deformation block 16 are connected by the connecting piece 17, the fixing block 15 and the connecting piece 17 support the deformation block 16 to prevent the deformation of the deformation block 16. When the deformation block 16 is not deformed, the piston 12 can be fixed by connecting the clamping strip 161 on the deformation block 16 with the clamping groove 121 on the piston 12 to prevent the piston 12 from moving in the vacuum blood collection tube 11.

[0047] In one embodiment, one end of the piston 12 has a liquid collecting groove 122 that is recessed toward the middle of the piston 12, and the other end of the piston 12 has a groove 123 that is recessed toward the middle of the piston 12. The card groove 121 is located on the inner circumferential surface of the groove 123, and the fixing block 15 and the deformation block 16 are both placed inside the groove 123.

[0048] In one embodiment, the diameter of the driving needle 22 is smaller than the inner diameter of the deformation block 16 , and the diameter of the driving needle 22 is larger than the inner diameter of the fixing block 15 .

[0049] In one embodiment, the booster tube 21 has a booster opening 211 at one end near the needle 221, and the vacuum blood collection tube 11 can enter the inside of the booster tube 21 through the booster opening 211. Since the diameter of the driving needle 22 is smaller than the inner diameter of the deformation block 16, and the diameter of the driving needle 22 is larger than the inner diameter of the fixing block 15, when the vacuum blood collection tube 11 enters the inside of the booster tube 21 through the booster opening, the fixing block 15 can limit the position of the vacuum blood collection tube 11.

[0050] The connecting joint 222 protrudes from the other end of the booster tube 21, and the connecting joint 222 is threadedly connected to the other end of the booster tube 21. In one embodiment, the other end of the booster tube 21 is provided with an exhaust hole 212, and the end of the booster tube 21 close to the needle 221 is provided with a paddle 213. Preferably, there are two paddles 213, and the two paddles 213 are arranged opposite to each other on the outer circumference of one end of the booster tube 21.

[0051] Since an exhaust hole 212 is provided at the other end of the booster tube 21 , the transfer assembly 2 can exhaust the air in the booster tube 21 through the exhaust hole 212 when in use, thereby avoiding resistance generated in the booster tube 21 due to increased air pressure.

[0052] In order to prevent the driving needle 22 from being contaminated before use, the transfer assembly 2 further includes an upper cover 23 and a lower cover 24. The upper cover 23 is movably connected to the driving needle 22, and the upper cover 23 wraps the needle 221 inside thereof; the lower cover 24 is detachably connected to the connecting joint 222, and the lower cover 24 wraps the connecting joint 222 inside thereof.

[0053] In one embodiment, the middle part of the upper cover 23 has a needle sleeve 231 used in conjunction with the needle 221. The needle sleeve 231 is directly sleeved on the outside of the needle 221, so as to wrap the needle 221 inside. The upper cover 23 also has a limiting protrusion 232 inside. After the upper cover 23 is sleeved on the driving needle 22, the needle 221 is placed in the needle sleeve 231, and the upper surface of the driving needle 22 abuts against the limiting protrusion 232. The upper cover 23 is also provided with a limiting groove 233, the inner diameter of which matches the outer diameter of the driving needle 22, and the limiting protrusion 232 is placed inside the limiting groove 233.

[0054] In one embodiment, one end of the lower cover 24 has a protective seat 241, and the middle of the lower cover 24 has a protective groove 242. The lower cover 24 can be directly sleeved on the connecting joint 222, and the connecting joint 222 is located in the protective groove 242. After the lower cover 24 is sleeved on the connecting joint 222, the protective seat 241 fits with the bottom of the booster tube 21, and the protective seat 241 can seal the exhaust hole 212.

[0055] The working principle of the blood sampling device of this embodiment is as follows:

[0056] like Figure 1 , Figure 8 , Fig. 9As shown, when drawing blood from a patient, first insert the blood collection needle into the piston 12 and connect it to the inside of the vacuum blood collection tube 11, and then use the negative pressure in the vacuum blood collection tube 11 to draw blood. At this time, since the piston 12 is fixed by the tube cover 14, the piston 12 will not move. After the blood collection is completed, pull the blood collection needle out of the piston 12, and remove the upper cover 23 and the lower cover 24 of the transfer assembly 2. Then turn the vacuum blood collection tube 11 upside down, and pierce the piston 12 with the needle 221 until the fixing block 15 abuts against the upper surface of the driving needle 22. Then connect the injection needle 3 or the infusion needle to the connecting joint 222, and insert the needle 221 of the injection needle 3 or the infusion needle into the container.

[0057] Use two fingers to grasp the two paddles 213 on the booster tube 21, press the vacuum blood collection tube 11 downward, and the driving needle 22 pushes the fixed block 15 and the piston 12 upward, thereby destroying the connecting piece 17 between the fixed block 15 and the deformation block 16. After further pressing the vacuum blood collection tube 11, the driving needle 22 further pushes the fixed block 15 and the piston 12 upward, and the piston 12 is subjected to an upward thrust. The piston 12 squeezes the deformation block 16 so that the deformation block 16 shrinks and deforms inward, and the clamping strip 161 is separated from the clamping groove 121. At this time, the piston 12 can move inside the vacuum blood collection tube 11. In the process of the piston 12 moving inside the vacuum blood collection tube 11 toward the other end of the vacuum blood collection tube 11, the pressure inside the vacuum blood collection tube 11 increases, and the blood is transported to the container through the driving needle 22, thereby completing the transfer of blood in the vacuum blood collection tube 11.

[0058] In this embodiment, blood can be collected through the vacuum blood collection tube 11, and the blood in the vacuum blood collection tube 11 can be transferred to another container through the transfer component 2. There is no need to open the piston 12 during the blood collection and blood transfer process, which reduces the risk of blood contamination in the vacuum blood collection tube 11. The blood transfer process is convenient and fast, and does not need to be operated on a clean workbench.

[0059] It should be noted that the connector 17 of the present application can be made of materials such as plastic or rubber, and its size has been tested to ensure that it can support the deformation block 16, and the connector 17 can be destroyed when the fixed block 15 is subjected to an upward thrust. The piston 12 of the present application can also be made of materials such as rubber or silicone.

[0060] Embodiment 2:

[0061] The present embodiment is described in detail below with reference to the first embodiment:

[0062] The present application embodiment provides a method for using a blood sampling device, which is applied to the blood sampling device as described in the first embodiment above, and comprises the following steps:

[0063] S1: After the blood collection needle is inserted into the piston 12 and connected to the inside of the vacuum blood collection tube 11, blood is collected by utilizing the negative pressure in the vacuum blood collection tube 11.

[0064] The blood collection needle can be an existing blood collection needle used in conjunction with the vacuum blood collection tube 11, and the vacuum blood collection tube 11 is pre-installed with an anticoagulant. During blood collection, since the vacuum blood collection tube 11 is provided with a tube cover 14, the clamping strip 161 on the deformation block 16 on the tube cover 14 is clamped with the clamping groove 121 on the piston 12, so that the piston 12 is fixed by the tube cover 14 and the piston 12 does not move in the vacuum blood collection tube 11.

[0065] S2: After the blood collection is completed, the blood collection needle is pulled out from the piston 12, and the vacuum blood collection tube 11 is placed on one side of the driving needle 22. The needle head 221 of the driving needle 22 pierces the piston 12 and communicates with the interior of the vacuum blood collection tube 11, and the injection needle 3 or the infusion needle is connected to the connecting joint 222.

[0066] After blood collection is completed, the blood collection needle is pulled out from the piston 12, and then the upper cover 23 and the lower cover 24 of the transfer needle are removed. Then the vacuum blood collection tube 11 is turned upside down, and the needle 221 pierces the piston 12 until the fixing block 15 abuts against the upper surface of the driving needle 22. Then, the injection needle 3 or the infusion needle is connected to the connecting joint 222, and the needle 221 of the injection needle 3 or the infusion needle is inserted into the container.

[0067] S3: Press the vacuum blood collection tube 11. During the pressing process of the vacuum blood collection tube 11, the driving needle 22 pushes the piston 12 to move inside the blood collection tube. The blood collected inside the vacuum blood collection tube 11 is transported to the injection needle 3 or the infusion needle through the driving needle 22, and then transferred to the container through the injection needle 3 or the infusion needle.

[0068] Use two fingers to grasp the two paddles 213 on the booster tube 21, press the vacuum blood collection tube 11 downward, and the driving needle 22 pushes the fixed block 15 and the piston 12 upward, thereby destroying the connecting piece 17 between the fixed block 15 and the deformation block 16. After further pressing the vacuum blood collection tube 11, the driving needle 22 further pushes the fixed block 15 and the piston 12 upward, and the piston 12 is subjected to an upward thrust. The piston 12 squeezes the deformation block 16 so that the deformation block 16 shrinks and deforms inward, and the clamping strip 161 is separated from the clamping groove 121. At this time, the piston 12 can move inside the vacuum blood collection tube 11. In the process of the piston 12 moving inside the vacuum blood collection tube 11 toward the other end of the vacuum blood collection tube 11, the pressure inside the vacuum blood collection tube 11 increases, and the blood is transported to the container through the driving needle 22, thereby completing the transfer of blood in the vacuum blood collection tube 11.

[0069] In this embodiment, blood can be collected through the vacuum blood collection tube 11, and the blood in the vacuum blood collection tube 11 can be transferred to another container through the transfer component 2. There is no need to open the piston 12 during the blood collection and blood transfer process, which reduces the risk of blood contamination in the vacuum blood collection tube 11. The blood transfer process is convenient and fast, and does not need to be operated on a clean workbench.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0072] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A blood sampling device, characterized in that: include: A vacuum blood collection assembly, the vacuum blood collection assembly comprising a vacuum blood collection tube and a piston, one end of the vacuum blood collection tube having a blood collection opening, the piston being located inside the blood collection opening, the piston being sealed and connected to the inner wall of the vacuum blood collection tube, and the piston being able to move inside the vacuum blood collection tube; A transfer assembly, the transfer assembly includes a booster tube and a drive needle, the drive needle is located inside the booster tube, one end of the drive needle has a needle, the other end of the drive needle has a connecting joint, the needle is connected to the connecting joint, and the needle can pierce the piston and then connect to the inside of the vacuum blood collection tube.

2. The blood collection device according to claim 1, characterized in that: The vacuum blood collection assembly also includes: A tube cover is sleeved on one end of the vacuum blood collection tube, the tube cover is detachably connected to the piston, and after the piston is detached from the tube cover, the piston can move inside the vacuum blood collection tube in a direction away from the tube cover; a first through hole is provided in the middle of the tube cover.

3. The blood collection device according to claim 2, characterized in that: A fixing block and a deformation block are provided in the middle of the tube cover, the deformation block is connected to the fixing block, a clamping strip is provided on the outer circumference of the deformation block, a clamping groove is provided on the piston, the clamping groove matches the clamping strip, and the deformation block is made of elastic material.

4. The blood collection device according to claim 3, characterized in that: There are two deformation blocks, which are axially symmetrically arranged, and a deformation groove is provided between the ends of the two deformation blocks. The fixing blocks are respectively connected to the two deformation blocks.

5. The blood collection device according to claim 3, characterized in that: There is a gap between the fixing block and the deforming block, a connecting piece is arranged in the gap, and the fixing block and the deforming block are connected through the connecting piece; a second through hole is provided in the middle of the fixing block, and the first through hole is connected to the second through hole.

6. The blood collection device according to claim 5, characterized in that: The diameter of the driving needle is smaller than the inner diameter of the deformation block, and the diameter of the driving needle is larger than the inner diameter of the fixing block.

7. The blood sampling device according to any one of claims 1 to 6, characterized in that: The boosting tube has a boosting opening at one end close to the needle, and the vacuum blood collection tube can enter the inside of the boosting tube through the boosting opening.

8. The blood sampling device according to any one of claims 1 to 6, characterized in that: The connecting joint protrudes from the other end of the booster tube, and the connecting joint is threadedly connected to the other end of the booster tube. An exhaust hole is provided at the other end of the booster tube, and a pick is provided at one end of the booster tube close to the needle.

9. The blood sampling device according to any one of claims 1 to 6, characterized in that: The transfer assembly further comprises an upper cover and a lower cover, wherein the upper cover is movably connected to the driving needle, and the upper cover wraps the needle inside thereof; The lower cover is detachably connected to the connecting joint, and the lower cover wraps the connecting joint inside.

10. A method for using a blood sampling device, characterized in that: The method of use is applied to the blood collection device according to any one of claims 1 to 9, and the method of use comprises the following steps: Inserting a blood collection needle into the piston to communicate with the inside of the vacuum blood collection tube, and utilizing the negative pressure in the vacuum blood collection tube to collect blood; After the blood collection is completed, the blood collection needle is pulled out from the piston, and the vacuum blood collection tube is placed on one side of the driving needle. The needle head of the driving needle pierces the piston and communicates with the inside of the vacuum blood collection tube, and an injection needle or an infusion needle is connected to the connecting joint; The vacuum blood collection tube is pressed, and during the pressing process, the driving needle pushes the piston to move inside the blood collection tube, and the blood collected inside the vacuum blood collection tube is transported to the injection needle or the infusion needle through the driving needle, and then transferred to the container through the injection needle or the infusion needle.

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