A blood collection needle

Abstract

The present invention discloses a blood collection needle, including a bottle needle connector, one side of the bottle needle connector is connected to an exhaust pipe, and the inside of the exhaust pipe is sequentially provided with a breathable and water-stopping filter element and a one-way valve along the direction from the inside to the outside of the bottle needle connector, and the one-way valve is unidirectionally conducted along the direction from the inside to the outside of the bottle needle connector. When collecting blood, the blood collection needle is inserted into the blood vessel, and the bottle needle is inserted into the blood collection tube. Before the blood enters the blood collection tube, the residual gas inside the blood collection needle hose and the bottle needle connector can be discharged to the outside through the breathable and water-stopping filter element and the one-way valve, and the outside gas cannot enter the hose, the bottle needle connector and the blood collection tube. At the same time, the breathable and water-stopping filter element can ensure that the blood does not leak out. The present invention combines the breathable and water-stopping filter element with the one-way valve to realize the one-way exhaust and liquid sealing functions of the product, effectively reduce the vacuum loss of the blood collection needle, improve the accuracy of the collected blood volume, and make an important contribution to the authenticity of the clinical test results.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a blood collection needle. Background Art

[0002] The blood collection needle is a device used to collect arterial and venous blood samples. Vacuum blood collection is currently the basic method for routine blood tests. The accuracy of the blood collection volume directly affects the clinical test results; and the maintenance of the vacuum degree in the blood collection tube is the main reason for the accuracy of the blood collection volume. The medical device industry focuses on the research of product vacuum maintenance, and has made improvements in materials, processes and other aspects, but it still cannot effectively solve the problem of vacuum loss in blood collection needles.

[0003] The blood collection needle in the prior art has the following defects: gas is easily retained in the hose, affecting clinical test results; external gas is easy to enter the blood collection needle hose, affecting the vacuum degree in the blood collection needle.

[0004] Therefore, how to avoid the influence of air on blood collection is a technical problem that technicians in this field currently need to solve. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a blood collection needle, which can effectively discharge the residual gas in the hose when used, avoid the influence of air on the blood collection process, and effectively reduce the vacuum loss.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A blood collection needle comprises a bottle needle connector, one side of the bottle needle connector is connected to an exhaust pipe, the interior of the exhaust pipe is provided with a breathable and water-stopping filter element and a one-way valve in sequence along the direction from the inside to the outside of the bottle needle connector, and the one-way valve is unidirectionally conductive along the direction from the inside to the outside of the bottle needle connector.

[0008] Preferably, the vial needle connector comprises an inner conical connector and an outer conical connector which cooperate with each other.

[0009] Preferably, the inner conical joint and the outer conical joint are both 6% conical joints.

[0010] Preferably, the exhaust pipe is connected to the inner cone joint.

[0011] Preferably, the exhaust pipe and the inner cone joint are an integral structure.

[0012] Preferably, the one-way valve is a duckbill one-way valve that cooperates with the interior of the exhaust pipe, and the breathable and water-stopping filter element cooperates with the interior of the duckbill one-way valve.

[0013] Preferably, the tube hole of the exhaust pipe includes an exhaust hole and a mounting hole which are connected in sequence from the inside to the outside of the bottle needle connector, the breathable and water-stopping filter element and the one-way valve are arranged in the mounting hole, and the diameter of the breathable and water-stopping filter element is larger than the aperture of the exhaust hole.

[0014] Preferably, the outer periphery of the air-permeable and water-stopping filter element is sealingly matched with the inner wall of the mounting hole.

[0015] Preferably, a cap covering the outside of the one-way valve is further provided at the end of the exhaust pipe, and the cap is provided with an air vent.

[0016] Preferably, the cap is threadably connected to the exhaust pipe.

[0017] The blood collection needle provided by the present invention comprises a bottle needle connector, one side of which is connected to an exhaust pipe, the interior of the exhaust pipe is sequentially provided with a breathable and water-stopping filter element and a one-way valve along the direction from the inside to the outside of the bottle needle connector, and the one-way valve is unidirectionally conductive along the direction from the inside to the outside of the bottle needle connector.

[0018] The working principle of the present invention is as follows:

[0019] The bottle needle connector of the blood collection needle is connected to the blood collection needle through a hose, and the bottle needle connector is connected to the bottle needle. When collecting blood, the blood collection needle is inserted into the blood vessel, and the bottle needle is inserted into the blood collection tube. Before the blood enters the blood collection tube, the residual gas inside the blood collection needle hose and the bottle needle connector can be discharged to the outside through the breathable water-stop filter and the one-way valve. During the blood collection process, due to the one-way conduction function of the one-way valve, the outside gas cannot enter the hose, the bottle needle connector and the blood collection tube. At the same time, the breathable water-stop filter can ensure that the blood does not leak out.

[0020] It can be seen that the present invention combines the breathable and water-stopping filter element with the one-way valve to achieve the one-way exhaust and liquid sealing functions of the product, effectively reduce the vacuum loss of the blood collection needle, improve the accuracy of blood collection, and make an important contribution to the authenticity of clinical test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the structure of a blood collection needle in a specific embodiment of the present invention;

[0023] Figure 2 for Figure 1A partial enlarged view of part A;

[0024] Figure 3 The figure is a schematic diagram of the exploded structure of the bottle insertion needle connector in a specific embodiment of the present invention.

[0025] Figures 1 to 3 middle:

[0026] 1-blood collection needle, 2-hose, 3-bottle needle connector, 4-blood collection tube, 31-inner cone connector, 32-outer cone connector, 33-exhaust pipe, 34-breathable water-stop filter, 35-one-way valve, 36-cap, 37-vent, 331-exhaust hole, 332-installation hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Please refer to Figures 1 to 3 , Figure 1 It is a schematic diagram of the structure of a blood collection needle in a specific embodiment of the present invention; Figure 2 for Figure 1 A partial enlarged view of part A; Figure 3 The figure is a schematic diagram of the exploded structure of the bottle insertion needle connector in a specific embodiment of the present invention.

[0029] The present invention provides a blood collection needle, comprising a bottle needle connector 3, one side of the bottle needle connector 3 is connected to an exhaust pipe 33, the inside of the exhaust pipe 33 is sequentially provided with a breathable and water-stopping filter element 34 and a one-way valve 35 along the direction from the inside to the outside of the bottle needle connector 3, and the one-way valve 35 is unidirectionally conducted along the direction from the inside to the outside of the bottle needle connector 3. The blood collection needle also comprises a blood collection needle head 1, a hose 2 and a bottle needle, the blood collection needle head 1 and the bottle needle connector 3 are connected through the hose 2, and the other end of the bottle needle connector 3 is connected to the bottle needle.

[0030] The working principle of the present invention is as follows:

[0031] When collecting blood, the blood collection needle 1 is inserted into the blood vessel, and the bottle needle is inserted into the blood collection tube 4. Before the blood enters the blood collection tube 4, the residual gas inside the blood collection needle hose 2 and the bottle needle connector 3 can be discharged to the outside through the breathable and waterproof filter 34 and the one-way valve 35. During the blood collection process, due to the one-way conduction function of the one-way valve 35, external gas cannot enter the hose 2, the bottle needle connector 3 and the blood collection tube 4. At the same time, the breathable and waterproof filter 34 can ensure that the blood does not leak out.

[0032] It should be noted that the filter element 34 used in this solution is a breathable and water-stopping porous filter element, which can be specifically a medical overflow-stopping filter element, which is characterized by being breathable and water-tight. The filter element can be sintered by embedding a polymer elastomer into the porous structure of a PE filter element through a sintering process. The polymer elastomer is an expander that swells when it comes into contact with water. Under positive pressure, it blocks liquids and gases, but under negative pressure, the expander will leave a gap for the gas to allow the gas to enter in the opposite direction. In this product, since it is used in combination with a vacuum blood collection tube, which has a negative pressure effect, after the filter element comes into contact with blood, the polymer elastomer expands and quickly blocks it, and the blood cannot leak through the filter element. However, if there is a negative pressure effect, even if the filter element is blocked, it cannot prevent external air from entering the tube. Therefore, the breathable and water-stopping filter element 34 in this solution must be used together with a one-way valve 35 to achieve the function of stopping liquid while preventing air from entering.

[0033] Preferably, the vial needle connector 3 comprises an inner conical connector 31 and an outer conical connector 32 which cooperate with each other. Figure 2 and Figure 3 As shown, the connection sealing performance can be ensured by the matching of the conical joints. At the same time, the bottle needle joint 3 is designed as a structure in which two inner and outer conical joints match each other, which also meets the structural standards of most blood collection needles. Of course, the bottle needle joint 3 in the present invention can also be designed as an integrated structure, which will not be described in detail herein.

[0034] Further preferably, both the inner conical connector 31 and the outer conical connector 32 are 6% conical connectors, that is, both are Luer connectors.

[0035] It should be noted that the exhaust pipe 33 in this embodiment can be connected to the inner conical joint 31, or can be arranged on the outer conical joint 32. Figure 2 and Figure 3 As shown, preferably, the exhaust pipe 33 in this solution is connected to one side of the inner cone joint 31.

[0036] It should be noted that the exhaust pipe 33 and the inner cone joint 31 can be designed as an integrated structure or a split structure. Preferably, Figure 2 and Figure 3 As shown, in this solution, the exhaust pipe 33 and the inner cone joint 31 are designed as an integrated structure, which can be specifically designed as an integrated plastic part or an integrated glass part, etc. This configuration further simplifies the processing steps of the bottle needle joint 3, and at the same time, further improves the connection strength and sealing performance between the exhaust pipe 33 and the inner cone joint 31. Figure 3 As shown, the inner cone joint 31 and the exhaust pipe 33 are integrally designed as a three-way structure. The exhaust pipe 33 is arranged obliquely relative to the inner cone joint 31.

[0037] Preferably, the one-way valve 35 is a duckbill one-way valve that cooperates with the interior of the exhaust pipe 33, such as Figure 2 and Figure 3 As shown, the air-permeable water-stop filter element 34 cooperates with the inside of the duckbill one-way valve to ensure that the gas passes through the air-permeable water-stop filter element 34 and then passes through the duckbill one-way valve. Specifically, the duckbill one-way valve can be a rubber duckbill one-way valve or a silicone duckbill one-way valve, etc., which has a smaller opening pressure. Of course, the one-way valve 35 in this solution can also be designed as a circular silicone one-way valve, a conical silicone one-way valve, an umbrella-shaped silicone one-way valve, etc., which will not be described in detail herein.

[0038] Preferably, the tube hole of the exhaust pipe 33 includes an exhaust hole 331 and a mounting hole 332 which are connected in sequence from the inside to the outside of the bottle needle connector 3, and the air-permeable and water-stop filter element 34 and the one-way valve 35 are arranged in the mounting hole 332, and the diameter of the air-permeable and water-stop filter element 34 is larger than the aperture of the exhaust hole 331. Such an arrangement facilitates the installation and fixing of the air-permeable and water-stop filter element 34 and the one-way valve 35. At the same time, the diameter of the air-permeable and water-stop filter element 34 is designed to be larger than the aperture of the exhaust hole 331. When the gas and blood flow outward, they will all pass through the air-permeable and water-stop filter element 34. When the blood reaches the air-permeable and water-stop filter element 34, it is also guaranteed not to leak out from the gap between the air-permeable and water-stop filter element 34 and the mounting hole 332, thereby realizing the safe liquid sealing function.

[0039] Preferably, the periphery of the breathable water-stop filter element 34 is sealed with the inner wall of the mounting hole 332. In this solution, the sealing cooperation between the periphery of the one-way valve 35 and the inner wall of the mounting hole 332 and the tight cooperation between the inner wall of the one-way valve 35 and the breathable water-stop filter element 34 are used to achieve a relatively sealed connection between the breathable water-stop filter element 34 and the mounting hole 332. Of course, this solution can also install a sealing ring between the breathable water-stop filter element 34 and the mounting hole 332 to further improve the degree of sealing cooperation.

[0040] Preferably, the end of the exhaust pipe 33 is also provided with a cap 36 which is covered on the outside of the one-way valve 35, and the cap 36 is provided with an air hole 37. Figure 2 and Figure 3 As shown, the cap 36 can ensure that the one-way valve 35 is not damaged by the outside, and the air vent 37 can ensure that the air inside the blood collection needle is discharged to the external environment in time.

[0041] It should be noted that the cap 36 can be connected and fixed to the exhaust pipe 33 by means of, for example, threaded connection, snap-on connection, etc. Preferably, the cap 36 in this solution is threadedly connected to the exhaust pipe 33 to ensure the firmness of the connection and avoid accidental falling off.

[0042] The present invention combines the breathable and water-stopping filter element 34 with the one-way valve 35 to discharge the residual air in the blood collection needle hose and the joint, thereby realizing the one-way exhaust and liquid sealing functions of the product, effectively reducing the vacuum loss of the blood collection needle, improving the accuracy of the collected blood volume, and making an important contribution to the authenticity of the clinical test results.

[0043] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A blood collection needle, characterized in that: The invention comprises a bottle insertion needle connector (3), one side of the bottle insertion needle connector (3) is connected to an exhaust pipe (33), the interior of the exhaust pipe (33) is provided with a breathable and water-stopping filter element (34) and a one-way valve (35) in sequence along the direction from the inside to the outside of the bottle insertion needle connector (3), and the one-way valve (35) is unidirectionally conductive along the direction from the inside to the outside of the bottle insertion needle connector (3).

2. The blood collection needle according to claim 1, characterized in that: The bottle insertion needle connector (3) comprises an inner conical connector (31) and an outer conical connector (32) which cooperate with each other.

3. The blood collection needle according to claim 2, characterized in that: The inner conical joint (31) and the outer conical joint (32) are both 6% conical joints.

4. The blood collection needle according to claim 2 or 3, characterized in that: The exhaust pipe (33) is connected to the inner cone joint (31).

5. The blood collection needle according to claim 4, characterized in that: The exhaust pipe (33) and the inner cone joint (31) are an integrated structure.

6. The blood collection needle according to claim 1, characterized in that: The one-way valve (35) is a duckbill one-way valve that cooperates with the interior of the exhaust pipe (33), and the air-permeable and water-stopping filter element (34) cooperates with the interior of the duckbill one-way valve.

7. The blood collection needle according to claim 1, characterized in that: The tube hole of the exhaust pipe (33) comprises an exhaust hole (331) and a mounting hole (332) which are connected in sequence from the inside to the outside of the bottle needle connector (3); the air-permeable and water-stopping filter element (34) and the one-way valve (35) are arranged in the mounting hole (332); and the diameter of the air-permeable and water-stopping filter element (34) is larger than the aperture of the exhaust hole (331).

8. The blood collection needle according to claim 7, characterized in that: The outer periphery of the air-permeable and water-stopping filter element (34) is sealingly matched with the inner wall of the mounting hole (332).

9. The blood collection needle according to claim 1, characterized in that: The end of the exhaust pipe (33) is also provided with a cover cap (36) which is arranged outside the one-way valve (35), and the cover cap (36) is provided with an air hole (37).

10. The blood collection needle according to claim 9, characterized in that: The cover cap (36) is threadedly connected to the exhaust pipe (33).

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