Anticoagulation blood collection tube

Abstract

The utility model relates to an anticoagulation blood collection tube which comprises a tube body configured to contain a blood sample; the cap is detachably arranged at the pipe opening of the pipe body; a medicine pricking piece is arranged on the cap and penetrates through the cap; the medicine pricking piece is provided with a medicine pricking channel; the medicine carrying cap is rotatably connected to the cap; the medicine carrying cap comprises a cavity and a plurality of medicine cavities; when the cap is connected with the medicine carrying cap, one end of the medicine pricking piece is located in the cavity. The medicine carrying cap is rotated, one end of the medicine pricking piece penetrates into one medicine cavity, and medicine in the medicine cavity flows through the medicine pricking channel and enters the tube body. And the anticoagulant is added into one medicine cavity once the rotation is carried out. Thus, even if the blood volume of the collected blood sample does not meet the detection requirement, blood sampling personnel can accurately add the anticoagulant of the corresponding unit according to the blood volume, and the anticoagulant and the collected blood are operated according to the standard proportion.

Description

Technical Field

[0001] The utility model relates to the technical field of anticoagulation blood collection tubes, in particular to an anticoagulation blood collection tube. Background Art

[0002] Coagulation system testing is a commonly used thrombosis and hemostasis screening test in clinical medicine. It is an important test item for preoperative screening of coagulation system diseases, observation of anticoagulant dosage, and auxiliary diagnosis of hemorrhagic diseases or thrombotic diseases. In clinical practice, coagulation system testing is mainly carried out by testing five items: prothrombin time PT, activated partial thromboplastin time APTT, fibrinogen FIB, thrombin time TT, and D-dimer DDHS.

[0003] Blood coagulation is a continuous and complex reaction process. Among them, calcium ions are involved in almost every step of the blood coagulation reaction and play a very important role. The International Committee for Standardization of Hematology recommends that specimens used for coagulation system testing should use sodium citrate with an anticoagulant of 109mmol / L, and the ratio of sodium citrate to whole blood should be 1:9. For some special personnel such as comatose patients, the elderly, and infants, the amount of blood specimens collected must be strictly controlled, which makes it difficult to meet the requirements for blood collection. Studies have shown that insufficient blood specimen collection, especially when it is below 80% of the scale line, will cause an inappropriate ratio of blood to anticoagulant, thereby affecting the accuracy of PT, APTT, TT, FIB and D-Dimer test results. Inaccurate test results will affect the judgment of clinicians, which will lead to misdiagnosis and wrong treatment methods. Utility Model Content

[0004] The utility model provides an anticoagulant blood collection tube to solve the technical problem that when the blood volume of the collected blood sample does not meet the detection requirements, the anticoagulant in the existing anticoagulant blood collection tube cannot be operated with the collected blood sample in a standard ratio.

[0005] The utility model discloses an anticoagulant blood collection tube, which comprises: a tube body, which is configured to accommodate a blood sample; a cover cap, which is detachably arranged at the tube mouth of the tube body; a medicine piercing piece is provided on the cover cap, and the medicine piercing piece passes through the cover cap; the medicine piercing piece is provided with a medicine piercing channel; a medicine carrying cap, which is rotatably connected to the cover cap; the medicine carrying cap comprises a cavity and a plurality of medicine cavities; wherein, when the cover cap is connected to the medicine carrying cap, one end of the medicine piercing piece is located in the cavity; by rotating the medicine carrying cap, one end of the medicine piercing piece passes through one of the medicine cavities, and the medicine in the medicine cavity flows into the tube body through the medicine piercing channel.

[0006] Furthermore, the medicine carrying cap is provided with a blood sampling channel, and the blood sampling channel runs through the medicine carrying cap; the blood sampling channel is located in the middle of the medicine carrying cap.

[0007] Furthermore, a sealing sheet is provided in the blood collection channel, and the sealing sheet is located at an end of the blood collection channel away from the cover cap.

[0008] Furthermore, one end of the medicine carrying cap has a rotating protrusion; the cover cap has a rotating hole, and a rotating groove adapted to the rotating protrusion is constructed in the rotating hole; by arranging the rotating protrusion in the rotating groove, the rotating connection between the medicine carrying cap and the cover cap is achieved.

[0009] Furthermore, a film for sealing the medicine cavity is provided at the leakage holes of the plurality of medicine cavities.

[0010] Furthermore, the medicine piercing member is fixedly connected to the cover cap.

[0011] Furthermore, one end of the medicine piercing member away from the cover cap is configured with a rounded corner or a chamfered corner.

[0012] Furthermore, a plurality of supporting protrusions are constructed at one end of the cap away from the tube body, and the plurality of supporting protrusions are evenly arranged around the cap; an end of the supporting protrusion away from the cap abuts against the medicine carrying cap, and a gap is formed between the medicine carrying cap and the cap.

[0013] Furthermore, a groove is formed on the cap; one end of the medicine-piercing member passes through the bottom of the groove to the sealed cavity of the cap.

[0014] Furthermore, the anticoagulant blood collection tube also includes a reset spring; a limiting protrusion is provided on the medicine piercing member; when the medicine piercing member is located in the groove, the limiting protrusion is located in the groove; the reset spring is sleeved on the medicine piercing member and is located between the bottom of the groove and the limiting protrusion.

[0015] Furthermore, one end of the medicine piercing member away from the cover cap is configured with a rounded corner or a chamfered corner.

[0016] The anticoagulation blood collection tube provided by the utility model can achieve the following technical effects:

[0017] The anticoagulant blood collection tube disclosed by the utility model has a unitized design of multiple chambers in the medicine cap, and anticoagulants are filled in the multiple chambers. After the blood collector completes the blood collection, he only needs to rotate the medicine cap, and allow the top of the medicine-piercing piece located in the cavity to enter the medicine cavity along with the movement of the medicine cap, so that the anticoagulant in the medicine cavity is easily added to the blood sample. Each rotation completes the addition of the anticoagulant in one medicine cavity. In this way, even if the blood volume of the collected blood sample does not meet the detection requirements, the blood collector can accurately add the corresponding unit of anticoagulant according to the blood volume, and operate the anticoagulant and the collected blood according to the standard ratio. The anticoagulant blood collection tube disclosed by the utility model has the characteristic of easy operation, and the blood collector can smoothly add the anticoagulant to the blood sample by rotating the medicine cap clockwise or grabbing it counterclockwise.

[0018] The above general description and the following description are merely exemplary and explanatory and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] One or more embodiments are exemplarily described by corresponding drawings, and these exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are regarded as similar elements, and wherein:

[0020] Figure 1 It is a schematic diagram of an embodiment of an anticoagulant blood collection tube of the utility model;

[0021] Figure 2 It is a schematic diagram of an embodiment of a tube body of an anticoagulant blood collection tube of the utility model;

[0022] Figure 3 It is a schematic diagram of an embodiment of the utility model in which a cap and a medicine carrying cap of an anticoagulant blood collection tube are connected;

[0023] Figure 4 It is a partial cross-sectional schematic diagram of an embodiment of a cap of an anticoagulant blood collection tube of the utility model;

[0024] Figure 5 yes Figure 4 A magnified view of part A;

[0025] Figure 6 yes Figure 4 A magnified view of part B;

[0026] Figure 7 It is a side view schematic diagram of an embodiment of a medicine carrying cap of an anticoagulant blood collection tube of the utility model;

[0027] Figure 8 It is a cross-sectional schematic diagram of an embodiment of the utility model in which a cap and a medicine carrying cap of an anticoagulant blood collection tube are connected;

[0028] Fig. 9 It is a cross-sectional schematic diagram of an embodiment of a medicine carrying cap of an anticoagulant blood collection tube of the utility model;

[0029] Fig.10 yes Figure 1 Enlarged view of part C;

[0030] Fig.11 It is a schematic diagram of an embodiment of a cap of an anticoagulant blood collection tube of the utility model;

[0031] Fig.12 It is a schematic diagram of an embodiment of a drug piercing member of an anticoagulant blood collection tube of the utility model.

[0032] Reference numerals:

[0033] 1. Tube body; 11. Tube cavity; 2. Cover cap; 21. Sealing cavity; 22. Rotating hole; 23. Rotating groove; 24. Supporting protrusion; 25. Groove; 26. Through hole; 27. Sealing groove; 3. Medicine carrying cap; 31. Rotating shaft; 32. Rotating protrusion; 33. Blood collection channel; 34. Sealing sheet; 35. Cavity; 36. Medicine cavity; 37. Film; 38. Leakage hole; 41. Chamfer; 42. Scale line; 43. Fillet; 44. Gap; 45. Reset spring; 46. Sealing ring; 5. Medicine piercing piece; 51. Medicine piercing channel; 52. Limiting protrusion. DETAILED DESCRIPTION

[0034] In order to be able to understand the features and technical contents of the embodiments of the utility model in more detail, the implementation of the embodiments of the utility model is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the utility model. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0035] The terms "first", "second", etc. in the specification and claims of the embodiments of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the embodiments of the utility model described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0036] In the embodiments of the present utility model, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present utility model and its embodiments, and are not intended to limit the indicated devices, elements or components to have specific directions, or to be constructed and operated in specific directions. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present utility model can be understood according to the specific circumstances.

[0037] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the utility model can be understood according to specific circumstances.

[0038] Unless otherwise specified, the term "plurality" means two or more and "plurality" means two or more.

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0040] like Figure 1 , Figure 2 As shown, the utility model discloses an anticoagulant blood collection tube, which includes a tube body 1, a cap 2, and a medicine carrying cap 3. A lumen 11 is constructed in the tube body 1, and the lumen 11 is used to accommodate a blood sample. An external thread is constructed on the outer tube wall of the tube body 1, and the external thread is located at the top of the tube body 1. A chamfer 41 is constructed at the bottom end of the tube body 1, so that the tube body 1 is easily inserted into the hole of the fixing frame for fixation. Optionally, the tube body 1 is made of a transparent material, for example, the tube body 1 is made of polypropylene or polyethylene. Optionally, scale lines 42 are printed on the outer surface of the tube body 1, and the scale lines 42 are used to display the amount of the blood sample in the lumen 11.

[0041] like Figures 3 to 6As shown, a sealed cavity 21 is constructed inside the cap 2, and an internal thread is constructed on the cavity wall of the sealed cavity 21. The internal thread of the cap 2 is adapted to the external thread of the tube body 1, and a detachable connection between the cap 2 and the tube body 1 is achieved by threaded connection. A piercing piece 5 is provided on the cap 2, and a piercing channel 51 is constructed inside the piercing piece 5. The piercing channel 51 penetrates the piercing piece 5. When the piercing piece 5 penetrates the cap 2 into the sealed cavity 21, the sealed cavity 21 can communicate with the outside world through the piercing channel 51. A rotating hole 22 is constructed in the middle of the cap 2, and the sealed cavity 21 can communicate with the outside world through the rotating hole 22. A rotating groove 23 is constructed on the hole wall of the rotating hole 22.

[0042] like Figures 7 to 9 As shown, a rotating shaft 31 is configured at one end of the medicine carrying cap 3, and a rotating protrusion 32 adapted to the rotating groove 23 is configured on the rotating shaft 31. The rotating protrusion 32 is arranged in a circle along the rotating shaft 31. Preferably, the rotating protrusion 32 is located at the end of the rotating shaft 31 away from the medicine carrying cap 3. By arranging the rotating protrusion 32 in the rotating groove 23, the rotation connection between the medicine carrying cap 3 and the cover cap 2 is realized. A blood sampling channel 33 is configured on the medicine carrying cap 3, and the blood sampling channel 33 is located in the middle position of the medicine carrying cap 3. The blood sampling channel 33 runs through the medicine carrying cap 3 and the rotating shaft 31. When the medicine carrying cap 3 is rotationally connected to the cover cap 2, the sealed cavity 21 can be connected to the outside through the blood sampling channel 33. A sealing sheet 34 is arranged in the blood sampling channel 33, and the sealing sheet 34 is used to block the blood sampling channel 33. The sealing sheet 34 is located at the end of the blood sampling channel 33 away from the cover cap 2. The medicine carrying cap 3 is constructed with multiple chambers, one of which is a cavity 35, and the other chambers are medicine chambers 36, which are used to store medicine. The cavity 35 and the multiple medicine chambers 36 are evenly arranged around the axis of the rotating shaft 31. The medicine carrying cap 3 is constructed with multiple leakage holes 38, one of which is located at the cavity 35, and the cavity 35 is connected to the outside world through the leakage hole 38; the other leakage holes 38 are respectively located at each medicine chamber 36, and the medicine chamber 36 is connected to the outside world through the leakage holes 38. A film 37 is provided at the leakage hole 38 of each medicine chamber 36, and the film 37 is used to seal the leakage hole 38 of the medicine chamber 36 to prevent the medicine in the medicine chamber 36 from leaking out. When the medicine carrying cap 3 is rotatably connected to the cover cap 2, one end of the medicine piercing member 5 penetrates the leakage hole 38 of the cavity 35 and enters the cavity 35.

[0043] In this embodiment, there are two ways to connect the piercing member 5 and the cap 2, which are as follows:

[0044] Alternatively, if Figure 1 , Figures 3 to 10As shown, the piercing member 5 is fixedly connected to the cap 2. One end of the piercing member 5 passes through the cap 2 to the sealed cavity 21 of the cap 2, and the other end of the piercing member 5 is located outside the cap 2. The end located outside the cap 2 and away from the cap 2 is configured with a fillet 43 or a chamfer 41. The top of the cap 2 can be regarded as the end away from the tube body 1. The top of the cap 2 is configured with a plurality of support protrusions 24, which are cylindrical and evenly arranged around the cap 2. The piercing member 5 is located between the support protrusion 24 and the rotating hole 22. When the medicine carrying cap 3 is rotatably connected to the cover cap 2, the end of the support protrusion 24 away from the cover cap 2 abuts against the medicine carrying cap 3. At this time, a gap 44 is formed between the medicine carrying cap 3 and the cover cap 2, so that the medicine carrying cap 3 can rotate more stably relative to the cover cap 2. At the same time, when the medicine carrying cap 3 rotates relative to the cover cap 2, the gap 44 is provided to facilitate the medicine piercing member 5 to enter the medicine cavity 36 from the cavity 35 through interference fit. Preferably, the medicine piercing member 5 is made of a flexible material, for example, the medicine piercing member 5 is made of a rubber material.

[0045] Alternatively, if Figure 8 , Fig.11 , Fig.12 As shown, the anticoagulation blood collection tube also includes a reset spring 45. A groove 25 is constructed at the top of the cap 2, and the groove 25 is located on one side of the rotating hole 22. A through hole 26 is constructed in the groove 25, through which the space in the groove 25 can be connected with the sealing cavity 21 of the cap 2. A limiting protrusion 52 is constructed on the outer surface of the piercing member 5, and the limiting protrusion 52 is located in the middle of the piercing member 5. The reset spring 45 is sleeved on one end of the piercing member 5, and one end of the reset spring 45 abuts against the limiting protrusion 52 of the piercing member 5, and then the piercing member 5 is set in the groove 25, and one end of the piercing member 5 passes through the through hole 26 at the bottom of the groove 25 and is placed in the sealing cavity 21 of the cap 2. At this time, the other end of the reset spring 45 abuts against the bottom of the groove 25. Finally, the medicine carrying cap 3 is set on the cover cap 2, and the medicine carrying cap 3 presses the medicine piercing member 5. At this time, the limiting protrusion 52 limits the reset spring 45, and the limiting protrusion 52 limits the medicine piercing member 5 to control the distance of the medicine piercing member 5 entering the cavity 35 or the medicine cavity 36. When the medicine piercing member 5 is located in the groove 25, the limiting protrusion 52 is located in the groove 25, the reset spring 45 is sleeved on the medicine piercing member 5, and the reset spring 45 is located between the groove bottom of the groove 25 and the limiting protrusion 52. The other end of the medicine piercing member 5 is located outside the cover cap 2. The end located outside the cover cap 2 and away from the cover cap 2 is configured with a fillet 43 or a chamfer 41.

[0046] In this embodiment, any one of the above two optional technical solutions can be selected.

[0047] Alternatively, if Figure 3 , Figure 8As shown, on the cap 2, a sealing groove 27 is configured at the bottom of the sealing cavity 21. A sealing ring 46 is arranged in the sealing groove 27. When the cap 2 is arranged on the tube body 1, the sealing ring 46 on the cap 2 can further enhance the sealing effect of the tube body 1.

[0048] Application scenario of an exemplary embodiment:

[0049] The anticoagulation blood collection tube disclosed in the utility model is produced and processed, such as Figures 1 to 12 , any one of the multiple chambers of the medicine carrying cap 3 is selected as the cavity 35, and the remaining chambers are filled with anticoagulants through the leakage holes of the remaining chambers to form a medicine cavity 36. After the anticoagulant is filled, a film 37 is set at the leakage hole 38 of the medicine cavity 36, and the film 37 is used to seal the leakage hole 38 of the medicine cavity 36 and seal the medicine cavity 36 to prevent the anticoagulant from being contaminated. Then, the rotating shaft 31 of the medicine carrying cap 3 is inserted into the rotating hole 22 of the cover cap 2, and the rotating protrusion 32 is set in the rotating groove 23, so that the medicine carrying cap 3 and the cover cap 2 are rotatably connected. At this time, the top of the medicine piercing member 5 enters the leakage hole 38 of the cavity 35, and at the same time, the reset spring 45 supports the limiting protrusion 52, and makes the limiting protrusion 52 of the medicine piercing member 5 contact the medicine carrying cap 3. Finally, the cover cap 2 is set on the tube body 1.

[0050] In later use, the blood collector uses the existing blood collection needle to collect blood from the patient, and passes the tail end of the blood collection needle through the sealing sheet 34 of the medicine carrying cap 3. The blood will pass through the tail end of the blood collection needle and flow through the blood collection channel 33 into the lumen 11 of the tube body 1. After the blood collection is completed and the collected blood sample does not meet the detection requirements, the blood collector adds the corresponding anticoagulant according to the amount of the corresponding blood sample. The anticoagulant in one medicine cavity 36 is one unit. For example, when the volume of the blood sample is below 80% of the scale line and above 60% of the scale line, two units of anticoagulant need to be added. The blood collector only needs to turn the medicine carrying cap 3. At this time, the medicine piercing member 5 moves downward, and the limiting protrusion 52 of the medicine piercing member 5 squeezes the reset spring 45. At this time, the top of the medicine piercing member 5 contacts the medicine carrying cap 3. When the medicine-piercing member 5 is aligned with the leakage hole 38 of a medicine cavity 36, at this time, the reset spring 45 is reset, and the medicine-piercing member 5 is driven to move upward through the limiting protrusion 52. The medicine-piercing member 5 moves upward to pierce the film 37 of the medicine cavity 36 and enter the leakage hole 38 of the medicine cavity 36. The anticoagulant in the medicine cavity 36 enters the tube cavity 11 of the tube body through the medicine-piercing channel 51 of the medicine-piercing member 5 and merges with the blood sample. In this way, the addition of one unit of anticoagulant is completed. After the anticoagulant addition of the unit is completed, the blood collector only needs to rotate the medicine carrying cap 3 once more to complete the addition of another unit of anticoagulant. In this way, even if the blood volume of the collected blood sample does not meet the detection requirements, the blood collector can accurately add the corresponding unit of anticoagulant according to the blood volume, and make the anticoagulant and the collected blood operate according to the standard ratio. The anticoagulant blood collection tube disclosed by the utility model has the characteristic of convenient operation, and the blood collector can smoothly add the anticoagulant into the blood sample by rotating the medicine cap clockwise or grabbing it counterclockwise.

[0051] The above description and the accompanying drawings fully illustrate the embodiments of the utility model so that those skilled in the art can practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The embodiments of the utility model are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims

1. An anticoagulant blood collection tube, characterized in that: include: A tube body (1) configured to contain a blood sample; A cover cap (2) is detachably arranged at the mouth of the tube body (1); a medicine-piercing member (5) is provided on the cover cap (2), and the medicine-piercing member (5) penetrates the cover cap (2); and a medicine-piercing channel (51) is provided on the medicine-piercing member (5); A medicine carrying cap (3) is rotatably connected to the cover cap (2); the medicine carrying cap (3) comprises a cavity (35) and a plurality of medicine cavities (36); When the cover cap (2) is connected to the medicine carrying cap (3), one end of the medicine piercing member (5) is located in the cavity (35); by rotating the medicine carrying cap (3), one end of the medicine piercing member (5) passes through one of the medicine cavities (36), and the medicine in the medicine cavity (36) flows through the medicine piercing channel (51) and enters the tube body (1).

2. The anticoagulant blood collection tube according to claim 1, characterized in that: The medicine carrying cap (3) is provided with a blood sampling channel (33), and the blood sampling channel (33) runs through the medicine carrying cap (3); The blood sampling channel (33) is located in the middle of the medicine carrying cap (3).

3. The anticoagulant blood collection tube according to claim 2, characterized in that: A sealing sheet (34) is provided in the blood sampling channel (33), and the sealing sheet (34) is located at an end of the blood sampling channel (33) away from the cover cap (2).

4. The anticoagulant blood collection tube according to claim 1, characterized in that: One end of the medicine carrying cap (3) is provided with a rotating protrusion (32); The cover cap (2) has a rotation hole (22), and a rotation groove (23) adapted to the rotation protrusion (32) is configured in the rotation hole (22); By arranging the rotating protrusion (32) in the rotating groove (23), the rotating connection between the medicine carrying cap (3) and the cover cap (2) is achieved.

5. The anticoagulant blood collection tube according to claim 1, characterized in that: A film (37) for sealing the medicine cavity (36) is provided at each of the leakage holes (38) of the medicine cavity (36).

6. The anticoagulant blood collection tube according to any one of claims 1 to 5, characterized in that: The medicine piercing member (5) is fixedly connected to the cover cap (2); One end of the piercing element (5) away from the cover cap (2) is configured with a rounded corner (43) or a chamfered corner (41).

7. The anticoagulant blood collection tube according to claim 6, characterized in that: A plurality of supporting protrusions (24) are formed on one end of the cover cap (2) away from the tube body (1), and the plurality of supporting protrusions (24) are evenly arranged around the cover cap (2); One end of the supporting protrusion (24) away from the cover cap (2) abuts against the medicine carrying cap (3), and a gap (44) is formed between the medicine carrying cap (3) and the cover cap (2).

8. The anticoagulant blood collection tube according to any one of claims 1 to 5, characterized in that: The cap (2) is provided with a groove (25); One end of the medicine-piercing member (5) passes through the bottom of the groove (25) to the sealed cavity (21) of the cover cap (2).

9. The anticoagulant blood collection tube according to claim 8, characterized in that: Also includes a return spring (45); The medicine-piercing member (5) is provided with a limiting protrusion (52); When the medicine-piercing member (5) is located in the groove (25), the limiting protrusion (52) is located in the groove (25); The return spring (45) is sleeved on the medicine-piercing member (5) and is located between the bottom of the groove (25) and the limiting protrusion (52).

10. The anticoagulant blood collection tube according to claim 9, characterized in that: One end of the piercing element (5) away from the cover cap (2) is configured with a rounded corner (43) or a chamfered corner (41).

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