EDTA (Ethylene Diamine Tetraacetic Acid) anticoagulation tube

Abstract

The utility model relates to the technical field of medical instruments, in particular to an EDTA (Ethylene Diamine Tetraacetic Acid) anticoagulation tube which comprises a tube body and a tube cover screwed at the open end of the tube body, a buckle is arranged on the outer wall of the pipe cover, a convex ring is formed at the open end of the pipe body, and the buckle is clamped with the convex ring after the pipe cover is in threaded connection with the pipe body, so that the pipe cover is limited to be separated from the pipe body in the axial direction of the pipe body; an anticoagulant is added into the tube body; according to the anti-freezing tube, the tube cover buckle and the tube body convex ring form axial limiting clamping connection, a double-locking mechanism is formed by matching threaded connection, even if threads are slightly loosened, the buckle can still prevent the tube cover from being separated from the tube body, and the problem of sample leakage caused by loose threaded connection of a traditional anti-freezing tube is fundamentally solved; and the safety of the blood sample in the collection, transportation and storage processes is ensured.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an EDTA anticoagulant tube. Background Technology

[0002] In clinical testing and medical research, EDTA anticoagulant tubes are widely used for blood sample collection and preservation. Traditional anticoagulant tubes typically use a simple screw-on connection between the tube body and cap. During use, the cap is prone to loosening or even falling off, which can lead to blood sample leakage, contamination, and waste, and may also affect the accuracy of test results. Furthermore, traditional anticoagulant tubes are not convenient or efficient to open and close. Therefore, there is an urgent need for a more robust and user-friendly EDTA anticoagulant tube to meet practical application requirements. Utility Model Content

[0003] In view of this, the purpose of this utility model is to propose an EDTA anti-condensation tube to solve the technical problems of easy loosening and falling off of the tube cap and inconvenient operation of existing anti-condensation tubes.

[0004] Based on the above objectives, this utility model provides an EDTA anticoagulant tube, including a tube body and a cap screwed to the open end of the tube body; the outer wall of the cap is provided with a buckle, and the open end of the tube body forms a convex ring. After the cap is screwed to the tube body, the buckle will engage with the convex ring to prevent the cap from detaching from the tube body along the axial direction; an anticoagulant is added to the tube body.

[0005] Preferably, the tube cap has a perforation in the middle, and a rubber plug is provided inside the tube cap to form a composite structure.

[0006] Preferably, the open end of the tube body is provided with an external thread, the inner edge surface of the tube cap is provided with an internal thread, and the convex ring is located below the external thread of the tube body.

[0007] Preferably, the buckles are symmetrically arranged on the outer wall of the tube cap, and the buckles and the tube cap are integrally formed by injection molding.

[0008] Preferably, the buckle is divided into a connecting part and a snap-fit ​​part;

[0009] Under normal conditions, the distance between the snap-fit ​​part and the center axis of the pipe cap is R1, and the distance between the outer edge of the convex ring and the center axis of the pipe body is R2. <R2。

[0010] Preferably, the snap-fit ​​portion has a flat surface and an arc surface, the flat surface being in contact with the convex annular surface and the arc surface being in contact with the convex annular line.

[0011] Preferably, an unlocking ring is fitted on the outer wall of the pipe cap, and the unlocking ring is rotatably connected to the pipe cap;

[0012] The outer edge of the unlocking ring is provided with an arched protrusion corresponding to the number of buckles. After the apex of the arched protrusion contacts the connecting part of the buckle, R1 > R2.

[0013] Preferably, the unlocking ring is provided with a protruding post, and the outer edge surface of the tube cover is formed with an inwardly recessed limiting groove. The protruding post is located in the limiting groove, and the limiting groove is used to control the rotation range of the unlocking ring.

[0014] The limiting groove is provided with an elastic element connected to the protruding post, which is used to push the arched protrusion of the unlocking ring to disengage from the contact of the buckle connection part.

[0015] Preferably, the anticoagulant is EDTA-K2 or EDTA-K3.

[0016] The beneficial effects of this utility model are:

[0017] This invention uses a cap snap-fit ​​mechanism to form an axial limiting snap-fit ​​with the tube body protruding ring, combined with a threaded connection to create a double locking mechanism. Even if the threads are slightly loose, the snap-fit ​​mechanism can still prevent the cap from detaching from the tube body, fundamentally solving the problem of sample leakage caused by loose screw connections in traditional anticoagulant tubes, and ensuring the safety of blood samples during collection, transportation and storage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the buckle of this utility model in its normal state.

[0020] Figure 2 This is a front view of the buckle of this utility model in its normal state;

[0021] Figure 3 for Figure 2 Enlarged view of point A;

[0022] Figure 4 This is a top view of the buckle of this utility model in its normal state;

[0023] Figure 5 This is a partial structural diagram of the present invention in its open state.

[0024] The numbers on the map are:

[0025] 1-Pipe body; 11-Protruding ring; 2-Pipe cap; 21-Rubber plug; 3-Snap fastener; 31-Connecting part; 32-Snap-fitting part; 4-Unlocking ring; 41-Arched protrusion; 42-Protruding post; 43-Elastic element. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0027] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] This utility model proposes an EDTA anti-condensation tube, such as... Figure 1 and Figure 2 As shown, the device includes a tube body 1 and a cap 2 screwed to the open end of the tube body 1. The outer wall of the cap 2 is provided with a buckle 3, and the open end of the tube body 1 forms a protruding ring 11. After the cap 2 is screwed to the tube body 1, the buckle 3 will engage with the protruding ring 11, thereby restricting the cap 2 from detaching from the tube body 1 along the axial direction of the tube body 1, effectively improving the stability of the connection between the cap 2 and the tube body 1, and preventing blood sample leakage. An anticoagulant is added inside the tube body 1 to prevent the collected blood sample from coagulating.

[0029] like Figure 1 As shown, the tube cap 2 has a perforation in the middle, and a rubber stopper 21 is installed inside the tube cap 2 to form a composite structure. When the puncture needle passes through the perforation and the rubber stopper 21, the rubber stopper 21 will elastically deform under the pressure of the puncture needle, forming a tight wrap. After the puncture needle is pulled out, the rubber stopper 21 quickly returns to its original shape due to its elasticity, achieving automatic sealing and effectively preventing sample leakage and external contamination.

[0030] like Figure 1 and Figure 2As shown, the open end of the tube body 1 is provided with an external thread, the inner edge surface of the tube cap 2 is provided with an internal thread, and the convex ring 11 is located below the external thread of the tube body 1. The threaded connection makes the installation and disassembly of the tube cap 2 and the tube body 1 more convenient. At the same time, the cooperation between the convex ring 11 and the buckle 3 further enhances the connection reliability.

[0031] As Figure 1 and Figure 2 shown, the buckles 3 are symmetrically arranged on the outer wall of the tube cap 2, and the buckles 3 and the tube cap 2 are integrally formed by injection molding. The symmetrically arranged buckles 3 can ensure uniform force when the tube cap 2 is connected to the tube body 1. The integrally formed method improves the strength and stability of the buckles 3 and reduces the risk of component detachment.

[0032] As Figure 3 shown, the buckle 3 is divided into a connecting part 31 and a clamping part 32. In the normal state of the buckle 3, the distance between the center axis of the tube cap 2 and the clamping part 32 is R1, and the distance between the outer edge surface of the convex ring 11 and the center axis of the tube body 1 is R2, and R1 < R2. The clamping part 32 has a flat surface and an arc surface. The flat surface is in surface contact with the convex ring 11, and the arc surface is in line contact with the convex ring 11. Such a dimensional design enables the clamping part 32 to smoothly cross over the convex ring 11 through the arc surface when the tube cap 2 is screwed onto the tube body 1. After the screwing is in place, the contact between the flat surface of the clamping part 32 and the convex ring 11 can provide a large frictional force to prevent the buckle 3 from displacing in the axial direction, achieving a stable connection.

[0033] As Figure 4 shown, an unlocking ring 4 is sleeved on the outer wall of the tube cap 2, and the unlocking ring 4 is rotatably connected to the tube cap 2; the outer edge surface of the unlocking ring 4 is provided with arched convex blocks 41 corresponding to the number of the buckles 3. After the vertex of the arched convex block 41 contacts the connecting part 31 of the buckle 3, R1 > R2. By rotating the unlocking ring 4, the connecting part 31 of the buckle 3 is pushed by the arched convex block 41, so that the clamping part 32 is separated from the convex ring 11, thereby unlocking the tube cap 2, and the operation is simple and convenient.

[0034] As Figure 3 , Figure 4 and Figure 5 shown, the unlocking ring 4 is provided with a convex column 42, and the outer edge surface of the tube cap 2 forms an inwardly concave limiting groove. The convex column 42 is located in the limiting groove. The limiting groove is used to control the rotation range of the unlocking ring 4; an elastic member 43 is arranged in the limiting groove and connected to the convex column 42. In this solution, the elastic member 43 is preferably a spring but not limited thereto, and is used to push the arched convex block 41 of the unlocking ring 4 to disengage from the contact with the connecting part 31 of the buckle 3. The setting of the limiting groove and the elastic member 43 ensures that the unlocking ring 4 can automatically reset when not in use, and at the same time limits the rotation range of the unlocking ring 4 to avoid misoperation.

[0035] The anticoagulant is either EDTA-K2 or EDTA-K3. These two anticoagulants can effectively chelate calcium ions in the blood, prevent blood clotting, ensure the quality of blood samples, and meet the needs of clinical testing and medical research.

[0036] Anticoagulant tube usage procedure: Following standard blood collection methods, draw an appropriate amount of blood sample and inject it into the anticoagulant tube. During the collection process, observe the blood flow within the tube to ensure the collected volume meets testing requirements. After collection, quickly remove the puncture needle; the rubber stopper 21 will automatically seal the perforation to prevent sample leakage and external contamination.

[0037] When it is necessary to open the pipe cap 2, rotate the unlocking ring 4 fitted on the outer wall of the pipe cap 2. The arched protrusion 41 on the unlocking ring 4 pushes the connecting part 31 of the buckle 3, causing the locking part 32 to separate from the protruding ring 11. At this time, the pipe cap 2 can be easily unscrewed. After use, release the unlocking ring 4. Under the action of the elastic element 43, the unlocking ring 4 automatically resets, and the arched protrusion 41 disengages from the connecting part 31 of the buckle 3.

[0038] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0039] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An EDTA anticoagulant tube, characterized by, include: The tube body and the tube cap screwed to the open end of the tube body; The outer wall of the pipe cap is provided with a buckle, and the open end of the pipe body is formed with a convex ring. After the pipe cap is screwed onto the pipe body, the buckle will engage with the convex ring to prevent the pipe cap from detaching from the pipe body along the axial direction of the pipe body. An anticoagulant is added to the tube.

2. The EDTA anticoagulation tube according to claim 1, characterized in that, The tube cap has a perforation in the middle, and a rubber plug is installed inside the tube cap to form a composite structure.

3. The EDTA anticoagulation tube according to claim 1, characterized in that, The tube body has an external thread at its open end, the tube cap has an internal thread on its inner edge, and the convex ring is located below the external thread of the tube body.

4. The EDTA anticoagulation tube according to claim 1, characterized in that, The buckles are symmetrically arranged on the outer wall of the pipe cap, and the buckles and the pipe cap are integrally formed by injection molding.

5. The EDTA anticoagulation tube according to claim 1, characterized in that, The buckle is divided into a connecting part and a snap-fit ​​part; Under normal conditions, the distance between the snap-fit ​​part and the center axis of the pipe cap is R1, and the distance between the outer edge of the convex ring and the center axis of the pipe body is R2. <R2。 6. The EDTA anticoagulation tube according to claim 5, characterized in that, The snap-fit ​​portion has a flat surface and an arc surface. The flat surface contacts the convex annular surface, and the arc surface contacts the convex annular line.

7. The EDTA anticoagulation tube according to claim 5, characterized in that, The outer wall of the pipe cover is fitted with an unlocking ring, and the unlocking ring is rotatably connected to the pipe cover; The outer edge of the unlocking ring is provided with an arched protrusion corresponding to the number of buckles. After the apex of the arched protrusion contacts the connecting part of the buckle, R1 > R2.

8. The EDTA anticoagulation tube according to claim 7, characterized in that, The unlocking ring is provided with a protruding post, and the outer edge of the tube cover is formed with an inwardly recessed limiting groove. The protruding post is located in the limiting groove, and the limiting groove is used to control the rotation range of the unlocking ring. The limiting groove is provided with an elastic element connected to the protruding post, which is used to push the arched protrusion of the unlocking ring to disengage from the contact of the buckle connection part.

9. The EDTA anticoagulation tube according to claim 1, characterized in that, The anticoagulant is EDTA-K2 or EDTA-K3.

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