A blood sampling device and method of use thereof

Abstract

The application provides a blood sampling device and a use method thereof. The blood sampling device comprises a vacuum blood sampling assembly, a transfer assembly and a piston. The vacuum blood sampling assembly comprises a vacuum blood sampling tube and the piston. One end of the vacuum blood sampling tube is provided with a blood sampling opening part, and the piston is located inside the blood sampling opening part. The piston is in sealing connection with the inner wall of the vacuum blood sampling tube and can move inside the vacuum blood sampling tube. The transfer assembly comprises a boost tube and a driving needle. The driving needle is located inside the boost tube. One end of the driving needle is provided with a needle head, and the other end of the driving needle is provided with a connecting joint. The needle head is in communication with the connecting joint. The needle head can be pierced through the piston and is in communication with the inside of the vacuum blood sampling tube. The blood sampling device provided by the application is provided with the vacuum blood sampling assembly and the transfer assembly. After blood is sampled by using the vacuum blood sampling assembly, the blood collected by the vacuum blood sampling assembly can be transferred to other containers by the transfer assembly. In the process of transferring, the piston in the vacuum blood sampling tube does not need to be opened, blood exposure is avoided, and the risk of blood pollution is reduced.

Description

TECHNICAL FIELD

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

[0002] In the process of using a platelet-rich plasma preparation device, blood needs to be collected from a patient and then transferred to the platelet-rich plasma preparation device. At present, a vacuum blood collection tube is generally used for blood collection.

[0003] After blood is collected using a vacuum blood collection tube, the plug in the vacuum blood collection tube needs to be opened in the transfer process, and then the blood is extracted using a syringe needle and injected into the platelet-rich plasma preparation device. In this process, the blood is exposed and has a risk of being contaminated. SUMMARY

[0004] Embodiments of the present application provide a blood sampling device and a method of using the same to solve the problems in the related art. The technical solutions are as follows.

[0005] In a first aspect, the embodiments of the present application provide a blood sampling device, comprising:

[0006] a vacuum blood collection assembly, the vacuum blood collection assembly comprising a vacuum blood collection tube and a piston, the vacuum blood collection tube having a blood collection opening at one end, the piston being located inside the blood collection opening, the piston being in sealing connection with the inner wall of the vacuum blood collection tube, and the piston being movable inside the vacuum blood collection tube;

[0007] a transfer assembly, the transfer assembly comprising a booster tube and a drive needle, the drive needle being located inside the booster tube, the drive needle having a needle head at one end and a connecting joint at the other end, the needle head being in communication with the connecting joint, and the needle head being capable of penetrating the piston to communicate with the inside of the vacuum blood collection tube.

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

[0009] a tube cover, the tube cover being sleeved on one end of the vacuum blood collection tube, the tube cover being detachably connected with the piston, the piston being movable inside the vacuum blood collection tube in a direction away from the tube cover after the piston is detached from the tube cover, and the middle part of the tube cover having a first through hole.

[0010] In an embodiment, the middle part of the tube cover is provided with a fixed block and a deformation block, the deformation block being connected with the fixed block, a clamping strip being provided on the outer circumferential surface of the deformation block, a clamping groove being provided on the piston and matched with the clamping strip, and the deformation block being made of an elastic material.

[0011] In an embodiment, the deformation block is two, the two deformation blocks being arranged in axial symmetry, the end portions of the two deformation blocks having a deformation groove therebetween, and the fixed block being connected with the two deformation blocks respectively.

[0012] In an embodiment, the fixed block and the deformation block have a gap therebetween, and a connecting piece is arranged in the gap, and the fixed block and the deformation block are connected through the connecting piece; the middle part of the fixed block has a second through hole, and the first through hole and the second through hole are in communication.

[0013] In an embodiment, 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 fixed block.

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

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

[0016] In an embodiment, the transfer assembly further comprises an upper cover and a lower cover, the upper cover is movably connected with the driving needle, and the upper cover wraps the needle in the inside thereof; the lower cover is detachably connected with the connecting joint, and the lower cover wraps the connecting joint in the inside thereof.

[0017] In a second aspect, the embodiments of the present application provide a use method of the blood collection device, the use method is applied to the blood collection device as described in any one of the above, and the use method comprises the following steps:

[0018] After the blood collection needle is inserted into the piston and is in communication with the inside of the vacuum blood collection tube, blood is collected by using the negative pressure in the vacuum blood collection tube;

[0019] After the blood collection is completed, the blood collection needle is pulled out of the piston, the vacuum blood collection tube is placed on one side of the driving needle, the needle of the driving needle is in communication with the inside of the vacuum blood collection tube after the needle pierces the piston, and a syringe needle or an infusion needle is connected to the connecting joint;

[0020] The vacuum blood collection tube is pressed, the piston is moved in the inside of the blood collection tube by the driving needle during the process of pressing the vacuum blood collection tube, the blood collected in the inside of the vacuum blood collection tube is delivered to the syringe needle or the infusion needle through the driving needle, and is transferred to a container through the syringe needle or the infusion needle.

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

[0022] The blood sampling device of the embodiment of the present application comprises a vacuum blood sampling assembly and a transfer assembly. The vacuum blood sampling assembly comprises a vacuum blood sampling tube and a piston. The piston is in sealing connection with the inner wall of the vacuum blood sampling tube and can move inside the vacuum blood sampling tube. The transfer assembly comprises a booster tube and a driving needle. The driving needle is located inside the booster tube. One end of the driving needle is provided with a needle head and the other end of the driving needle is provided with a connecting joint. In use, the vacuum blood sampling tube can be preloaded with an anticoagulant. When blood is collected from a patient, the blood sampling needle is inserted into the piston and is in communication with the inside of the vacuum blood sampling tube. Blood is collected by using the negative pressure inside the vacuum blood sampling tube. After blood collection, the blood sampling needle is pulled out of the piston. Then, the vacuum blood sampling tube is placed on one side of the driving needle. The needle head of the driving needle is used to pierce the piston and is in communication with the inside of the vacuum blood sampling tube. An injection needle or an infusion needle is connected to the connecting joint. Then, the needle head of the injection needle or the infusion needle is inserted into a container. Then, the vacuum blood sampling tube is pressed. In the process of pressing the vacuum blood sampling tube, the piston is pushed by the driving needle to move inside the vacuum blood sampling tube. The blood collected in the vacuum blood sampling tube is transported to the injection needle or the infusion needle through the driving needle and is transferred to the container through the injection needle or the infusion needle. The blood sampling device of the embodiment of the present application is provided with the vacuum blood sampling assembly and the transfer assembly. After blood is collected by using the vacuum blood sampling assembly, the blood collected by the vacuum blood sampling assembly can be transferred to other containers through the transfer assembly. In the process of transferring, the piston in the vacuum blood sampling tube does not need to be opened. The blood is not exposed and the risk of blood contamination is reduced.

[0023] The above summary is intended to illustrate only and is not intended to be limiting in any way. Still other aspects, embodiments and features of the application are readily apparent to those skilled in the art and are intended to be encompassed by this application, by reference to the drawing and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0024] In the drawings, like numerals refer to like elements throughout the various drawings. The drawings are not necessarily to scale, the emphasis instead being placed on the relations between various elements. It should be understood that the drawings only depict some embodiments in accordance with the disclosure and should not be considered limiting.

[0025] Figure 1 is a sectional view of the blood sampling device;

[0026] Figure 2 is a structural schematic view of the vacuum blood sampling assembly;

[0027] Figure 3 is a sectional view of the vacuum blood sampling assembly;

[0028] Figure 4 is an exploded view of the vacuum blood sampling assembly;

[0029] Figure 5This is a schematic diagram of the pipe cap structure;

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

[0031] Figure 7 A cross-sectional view of the transfer component;

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

[0033] Figure 9 This is a schematic diagram showing the usage status of the blood collection device;

[0034] Figure 10 This is a schematic diagram of another usage state of the blood collection device;

[0035] 1. Vacuum blood collection assembly; 2. Transfer assembly; 11. Vacuum blood collection tube; 12. Piston; 13. Blood collection opening; 21. Push tube; 22. Drive needle; 221. Needle tip; 222. Connecting connector; 14. Tube cap; 141. First through hole; 15. Fixing block; 16. Deformation block; 161. Locking strip; 121. Locking groove; 162. Deformation groove; 17. Connector; 151. Second through hole; 122. Liquid collection tank; 123. Groove; 211. Push opening; 212. Vent hole; 213. Paddle; 23. Upper cover; 24. Lower cover; 231. Needle sheath; 232. Limiting protrusion; 233. Limiting groove; 241. Protective seat; 242. Protective groove; 3. Injection needle. Detailed Implementation

[0036] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0037] Example 1:

[0038] like Figures 1 to 10 As shown, this application provides a blood collection device, including a vacuum blood collection assembly 1 and a transfer assembly 2. The vacuum blood collection assembly 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, and the piston 12 is located inside the blood collection opening 13. The piston 12 is sealed to the inner wall of the vacuum blood collection tube 11 and can move inside the vacuum blood collection tube 11. The transfer assembly 2 includes a push tube 21 and a drive needle 22. The drive needle 22 is located inside the push tube 21. One end of the drive needle 22 has a needle tip 221, and the other end has a connecting connector 222. The needle tip 221 communicates with the connecting connector 222 and can pierce the piston 12 to communicate with the inside of the vacuum blood collection tube 11.

[0039] The blood collection device of the embodiment of the application is used, and the vacuum blood collection tube 11 can be preloaded with an anticoagulant. When collecting blood from a patient, the blood collection needle is inserted into the piston 12 to communicate with the inside of the vacuum blood collection tube 11, and blood is collected by using the negative pressure in the inside of the vacuum blood collection tube 11. After blood collection is completed, the blood collection needle is pulled out of the piston 12, and then the vacuum blood collection tube 11 is placed on one side of the drive needle 22, the needle head 221 of the drive needle 22 is inserted into the piston 12 to communicate with 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 the piston 12 is pushed to move inside the blood collection tube by the drive needle 22 in the process of pressing the vacuum blood collection tube 11, the blood collected in the inside of the vacuum blood collection tube 11 is transported to the injection needle 3 or the infusion needle by the drive needle 22, and is transferred to the container through the injection needle 3 or the infusion needle. The blood collection device of the embodiment of the application is provided with the vacuum blood collection assembly 1 and the transfer assembly 2, after blood is collected by using the vacuum blood collection assembly 1, the blood collected by the vacuum blood collection assembly 1 can be transferred to other containers through the transfer assembly 2, and the piston 12 in the vacuum blood collection tube 11 does not need to be opened in the process of transfer, so that blood is not exposed and the risk of blood contamination is reduced.

[0040] Since the vacuum blood collection assembly 1 includes the vacuum blood collection tube 11 and the piston 12, the inside of the vacuum blood collection tube 11 can be sealed by the piston 12, so that the inside of the vacuum blood collection tube 11 is in a sealed state. The vacuum blood collection tube 11 is used for negative pressure blood collection, which is convenient and fast, can reduce the blood collection time, and can improve the blood collection experience of the patient. In an embodiment, the piston 12 can be in interference fit with the vacuum blood collection tube 11, so as to realize the sealed connection of the piston 12 and the vacuum blood collection tube 11.

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

[0042] In order to realize the detachable connection of the tube cover 14 and the piston 12, a fixed block 15 and a deformation block 16 are arranged in the middle part of the tube cover 14. The deformation block 16 is connected with the fixed block 15, a clamping strip 161 is arranged on the outer circumferential surface of the deformation block 16, a clamping groove 121 is arranged on the piston 12, and the clamping groove 121 is matched with the clamping strip 161. The deformation block 16 is made of an elastic material. Preferably, the deformation block 16 and the tube cover 14 are both made of an elastic material, and the elastic material can be silicone, rubber or plastic.

[0043] In an 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 means of adhesion or the like. The middle part of the deformation block 16 also has a first through hole 141, and the fixing block 15 is located inside the first through hole 141.

[0044] In an embodiment, the deformation block 16 is two, and the two deformation blocks 16 are arranged in axial symmetry, and the two deformation blocks 16 have a deformation groove 162 between the ends thereof, and the fixing block 15 is connected with the two deformation blocks 16 respectively. When the two deformation blocks 16 are extruded by external force, the two deformation blocks 16 can approach each other due to deformation. Preferably, the cross sections of the two deformation blocks 16 are respectively in a semicircular structure.

[0045] In order to realize the connection between the fixing block 15 and the deformation block 16, a gap is arranged between the fixing block 15 and the deformation block 16, and a connecting piece 17 is arranged in the gap, and the fixing block 15 and the deformation block 16 are connected through the connecting piece 17. Preferably, the connecting piece 17 is four, and the adjacent connecting pieces 17 are arranged at intervals. The fixing block 15 is connected with one of the deformation blocks 16 through two of the connecting pieces 17, and the fixing block 15 is connected with the other deformation block 16 through the other two connecting pieces 17. The middle part of the fixing block 15 has a second through hole 151, and the first through hole 141 and the second through hole 151 are communicated.

[0046] Since the fixing block 15 and the deformation block 16 are connected through the connecting piece 17, the deformation block 16 is supported by the fixing block 15 and the connecting piece 17, so that the deformation of the deformation block 16 is prevented. When the deformation block 16 does not deform, 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, so that the piston 12 is prevented from moving in the vacuum blood collection tube 11.

[0047] In an embodiment, one end of the piston 12 has a liquid collecting groove 122 recessed to the middle part of the piston 12, the other end of the piston 12 has a recess 123 recessed to the middle part of the piston 12, the clamping groove 121 is located on the inner circumferential surface of the recess 123, and the fixing block 15 and the deformation block 16 are both arranged inside the recess 123.

[0048] In an 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 an embodiment, the boost tube 21 has a boost opening part 211 near one end of the needle head 221, and the vacuum blood collection tube 11 can enter the inside of the boost tube 21 through the boost opening part 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 boost tube 21 through the boost opening, the vacuum blood collection tube 11 can be limited by the fixing block 15.

[0050] The connecting joint 222 protrudes from the other end of the booster tube 21, and is threadedly connected to the other end of the booster tube 21. In an embodiment, the other end of the booster tube 21 is provided with an exhaust hole 212, and the booster tube 21 is provided with a push piece 213 near the end of the needle 221. Preferably, the push piece 213 is two, and the two push pieces 213 are oppositely arranged on the outer circumferential surface of the end of the booster tube 21.

[0051] Since the 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 during use, thereby avoiding the resistance caused by the increase of air pressure in the booster tube 21.

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

[0053] In an embodiment, the middle part of the upper cover 23 is provided with a needle sleeve 231 for cooperating with the needle 221, and the needle sleeve 231 directly sleeves the outside of the needle 221, thereby wrapping the needle 221 inside. The inside of the upper cover 23 is further provided with a limiting protrusion 232, and after the upper cover 23 is sleeved on the drive needle 22, the needle 221 is placed in the needle sleeve 231, and the upper surface of the drive needle 22 abuts against the limiting protrusion 232. The upper cover 23 is further provided with a limiting groove 233, and the inner diameter of the limiting groove 233 matches the outer diameter of the drive needle 22, and the limiting protrusion 232 is placed inside the limiting groove 233.

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

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

[0056] As Figure 1 , Figure 8 , Figure 9As shown, when blood is collected from a patient, the blood collection needle is first inserted into the piston 12 to communicate with the interior of the vacuum blood collection tube 11, and then blood is collected by using the negative pressure in the vacuum blood collection tube 11. At this time, the piston 12 cannot move because the piston 12 is fixed by the tube cover 14. After blood collection is completed, the blood collection needle is pulled out of the piston 12, and the upper cover 23 and the lower cover 24 of the transfer assembly 2 are removed. Then, the vacuum blood collection tube 11 is inverted, the needle 221 pierces the piston 12 until the fixed 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.

[0057] The two prongs 213 on the booster tube 21 are gripped by two fingers, the vacuum blood collection tube 11 is pressed downward, the driving needle 22 pushes the fixed block 15 and the piston 12 upward, thereby breaking the connecting piece 17 between the fixed block 15 and the deformed block 16. After the vacuum blood collection tube 11 is further pressed, the driving needle 22 further pushes the fixed block 15 and the piston 12 upward, the piston 12 is pushed upward, the piston 12 squeezes the deformed block 16 to make the deformed block 16 shrink and deform inward, and the clamping strip 161 is disengaged from the clamping groove 121. At this time, the piston 12 can move inside the vacuum blood collection tube 11, and in the process of moving the piston 12 inside the vacuum blood collection tube 11 to the other end of the vacuum blood collection tube 11, the pressure in the vacuum blood collection tube 11 increases, and the blood is transported into the container through the driving needle 22, thereby completing the transfer of the blood in the vacuum blood collection tube 11.

[0058] The embodiment can collect blood through the vacuum blood collection tube 11, and can transfer the blood in the vacuum blood collection tube 11 to another container through the transfer assembly 2. In the process of collecting blood and transferring blood, the piston 12 does not need to be opened, thereby reducing the risk of contamination of the blood inside the vacuum blood collection tube 11. The blood transfer process is convenient and fast, and does not need to be operated on a clean bench.

[0059] It should be noted that the connecting piece 17 of the present application can be made of plastic or rubber, and the size is tested to ensure that it can support the deformed block 16 and can be broken when the fixed block 15 is pushed upward. The piston 12 of the present application can also be made of rubber or silicone.

[0060] Embodiment Two:

[0061] The embodiment is described in detail below with reference to Embodiment One:

[0062] The present application provides a use method of a blood collection device, which is applied to the blood collection device of Embodiment One described above, and the use method comprises the following steps:

[0063] S1: Insert the blood collection needle into the piston 12 to communicate with the inside of the vacuum blood collection tube 11, and collect blood by using the negative pressure in the vacuum blood collection tube 11.

[0064] The blood collection needle can be the existing blood collection needle used in cooperation with the vacuum blood collection tube 11, and the vacuum blood collection tube 11 is preloaded with an anticoagulant. When collecting blood, the tube cover 14 is arranged on the vacuum blood collection tube 11, 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 cannot move in the vacuum blood collection tube 11.

[0065] S2: After blood collection, the blood collection needle is pulled out of the piston 12, 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 is pierced into the piston 12 to communicate with 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.

[0066] After blood collection, the blood collection needle is pulled out of 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 inverted, the needle head 221 is pierced into the piston 12 until the fixed 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 head 221 of the injection needle 3 or the infusion needle is inserted into the container.

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

[0068] Two fingers are used to hold the two tabs 213 on the booster tube 21, the vacuum blood collection tube 11 is pressed downward, the driving needle 22 pushes the fixed block 15 and the piston 12 upward, so that the connecting piece 17 between the fixed block 15 and the deformation block 16 is damaged. Further pressing the vacuum blood collection tube 11, the driving needle 22 further pushes the fixed block 15 and the piston 12 upward, the piston 12 is pushed upward, the piston 12 extrudes the deformation block 16 to make the deformation block 16 shrink and deform 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, and in the process of moving the piston 12 inside the vacuum blood collection tube 11 to the other end of the vacuum blood collection tube 11, the pressure in the vacuum blood collection tube 11 increases, the blood is transported to the container through the driving needle 22, and the transfer of the blood in the vacuum blood collection tube 11 is completed.

[0069] The blood can be collected by the vacuum blood collection tube 11, and the blood in the vacuum blood collection tube 11 can be transferred to another container by the transfer assembly 2. The piston 12 does not need to be opened during the collection and transfer of the blood, and the risk of contamination of the blood in the vacuum blood collection tube 11 is reduced. The blood transfer process is convenient and fast, and does not need to be operated on a clean bench.

[0070] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection 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 can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

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

[0072] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A blood collection device, characterized in that, include: A vacuum blood collection assembly includes a vacuum blood collection tube and a piston. One end of the vacuum blood collection tube has a blood collection opening. The piston is located inside the blood collection opening and is sealed to the inner wall of the vacuum blood collection tube. The piston can move inside the vacuum blood collection tube. The transfer assembly includes a push tube and a drive needle. The drive needle is located inside the push tube. One end of the drive needle has a needle tip, and the other end of the drive needle has a connecting connector. The needle tip communicates with the connecting connector and can pierce the piston and communicate with the inside of the vacuum blood collection tube. The vacuum blood collection assembly also includes: A cap is fitted onto one end of the vacuum blood collection tube. The cap is detachably connected to the piston. After the piston is separated from the cap, the piston can move inside the vacuum blood collection tube away from the cap. The cap has a first through hole in the middle. The pipe cap is provided with a fixing block and a deformation block in the middle. The deformation block is connected to the fixing block. A retaining strip is provided on the outer circumference of the deformation block. A retaining groove is provided on the piston. The retaining groove matches the retaining strip. The deformation block is made of elastic material. There is a gap between the fixed block and the deformable block, and a connector is provided in the gap. The fixed block and the deformable block are connected by the connector. The middle part of the fixed block has a second through hole, and the first through hole is connected to the second through hole. The diameter of the driving pin is smaller than the inner diameter of the deformable block, and the diameter of the driving pin is larger than the inner diameter of the fixed block.

2. The blood collection device according to claim 1, characterized in that, There are two deformation blocks, which are arranged symmetrically on an axis. There is a deformation groove between the ends of the two deformation blocks. The fixing block is connected to the two deformation blocks respectively.

3. The blood collection device according to any one of claims 1 to 2, characterized in that, The booster tube has a booster opening at one end near the needle, through which the vacuum blood collection tube can enter the booster tube.

4. The blood collection device according to any one of claims 1 to 2, characterized in that, The connecting joint protrudes from the other end of the booster tube and is threaded to the other end of the booster tube. The other end of the booster tube has an exhaust hole and a lever is provided on the end of the booster tube near the needle.

5. The blood collection device according to any one of claims 1 to 2, characterized in that, The transfer assembly also includes an upper cover and a lower cover, the upper cover being movably connected to the drive needle, and the upper cover enclosing the needle tip inside it; The lower cover is detachably connected to the connecting joint, and the lower cover encloses the connecting joint inside it.

Images