Disposable blood taking needle with filtering structure

Abstract

The utility model provides a disposable blood taking needle with a filtering structure, which belongs to the technical field of blood taking needles, and comprises a blood taking component, a needle cylinder, a piston movably mounted in the needle cylinder, a sleeve inserted at the end part of the needle cylinder, and a needle inserted at the end part of the sleeve; the filter assembly comprises an insertion block movably inserted in the side wall of the sleeve, a filter element clamped in the middle of the insertion block and a gasket fixedly arranged on the side wall of the insertion block in a sleeving mode, and the end of the insertion block is in sealed contact with the inner wall of the needle cylinder. Compared with the prior art, the blood collection tube has the advantages that the filtering structure can effectively intercept impurities, it is ensured that collected blood samples are purer, blood is filtered before entering the blood collection tube, it is ensured that the blood collection process is smooth, and the blood collection time is shortened. The blood can pass through the blood taking needle more stably, turbulence and shear force of the blood are reduced, and therefore the risk of hemolysis is reduced, and the safety of blood taking is improved.

Description

Technical Field

[0001] This utility model belongs to the field of blood collection needle technology, specifically relating to a disposable blood collection needle with a filtering structure. Background Technology

[0002] A blood collection needle is an instrument used in medical procedures to collect blood samples. It typically consists of a needle tip, needle hub, catheter, and connecting device. Common blood collection needles can be divided into manual and automatic needles. Manual needles require medical personnel to manually insert the needle into the blood vessel, while automatic needles use a built-in spring device or other triggering mechanism to achieve rapid and automatic puncture, reducing patient pain and the difficulty of operation for medical personnel.

[0003] During blood collection, tiny impurities such as tissue fragments and fibrin may enter the blood. A filtration system effectively intercepts these impurities, ensuring a purer blood sample, reducing interference from impurities in subsequent blood test results, and improving test accuracy. With ordinary blood collection needles, some blood components may form clots inside the needle or adhere to the needle wall, causing blockage and affecting the smooth progress of blood collection. Furthermore, excessive pressure or friction during blood collection can easily lead to red blood cell rupture and hemolysis. Utility Model Content

[0004] The purpose of this invention is to provide a disposable blood collection needle with a filtering structure, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A disposable blood collection needle with a filtering structure includes,

[0007] A blood collection assembly includes a syringe, a piston movably installed inside the syringe, a cannula inserted into the end of the syringe, and a needle inserted into the end of the cannula.

[0008] The filter assembly includes a plug that is movably inserted into the side wall of the sleeve, a filter element that is snapped into the middle of the plug, and a gasket that is fixedly sleeved on the side wall of the plug, wherein the end of the plug is in sealed contact with the inner wall of the syringe.

[0009] As a preferred embodiment of the present invention, the blood collection assembly further includes a push block that is movably inserted into the inside of the syringe, and a spring installed at the end of the push block.

[0010] In a preferred embodiment of this invention, the pusher end is engaged with the piston end, and the spring end is in elastic contact with the piston sidewall.

[0011] As a preferred embodiment of the present invention, the blood collection assembly further includes a housing that is snapped onto the side wall of the syringe, and a plug installed at the end of the housing.

[0012] In a preferred embodiment of this utility model, the plug end is sealed and inserted into the syringe end, and the plug communicates with the inside of the syringe.

[0013] As a preferred embodiment of this utility model, the blood collection assembly further includes an air pump installed inside the housing, and the air pump inlet is connected to the plug via a pipe.

[0014] As a preferred embodiment of the present invention, the blood collection assembly further includes a rubber stopper encapsulated at the end of the syringe, the rubber stopper being sealed and fitted onto the end of the cannula.

[0015] Compared with existing technologies, the beneficial effects of this invention are: the filtration structure can effectively intercept these impurities, ensuring that the collected blood sample is purer; filtering the blood before it enters the blood collection tube ensures a smooth blood collection process and reduces collection time; and allowing the blood to pass through the blood collection needle more steadily, reducing blood turbulence and shear force, thereby lowering the risk of hemolysis and improving the safety of blood collection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a front structural diagram of the present invention;

[0019] Figure 3 This is a side view of the present invention.

[0020] Figure 4 This is a schematic cross-sectional view of section AA of the present invention.

[0021] In the diagram: 100, blood collection assembly; 101, syringe; 102, piston; 103, cannula; 104, needle; 105, push block; 106, spring; 107, outer shell; 108, plug; 109, air pump; 110, rubber stopper; 200, filter assembly; 201, insert block; 202, filter element; 203, gasket. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0025] Example

[0026] Reference Figure 1-4 This is an embodiment of the present invention, which provides a disposable blood collection needle with a filtering structure, comprising:

[0027] The blood collection assembly 100 includes a syringe 101, a piston 102 movably installed inside the syringe 101, a cannula 103 inserted into the end of the syringe 101, and a needle 104 inserted into the end of the cannula 103.

[0028] The filter assembly 200 includes an insert 201 that is movably inserted into the side wall of the sleeve 103, a filter element 202 that is snapped into the middle of the insert 201, and a gasket 203 that is fixedly sleeved on the side wall of the insert 201. The end of the insert 201 is in sealed contact with the inner wall of the syringe 101.

[0029] The syringe 101, equipped with a piston 102, is used in conjunction with the needle 104 for blood collection. The cannula 103 is used to connect the needle 104 to the syringe 101, facilitating the installation of needles 104 of different specifications and improving the applicability of the blood collection needles. The cannula 103 also maintains the seal at the end of the syringe 101. The filter assembly 200 is a detachable structure, facilitating the recycling and reuse of the filter element 202 and reducing material consumption. The insert block 201 is used to install the filter element 202 on the side wall of the cannula 103, maintaining the stability of the filter element 202. A gasket 203 is added to the side wall of the insert block 201 and connected to the cannula 103 to maintain the sealing performance of the side wall of the insert block 201 and prevent the insert block 201 from loosening.

[0030] Specifically, the blood collection assembly 100 also includes a push block 105 that is movably inserted into the syringe 101, and a spring 106 installed at the end of the push block 105.

[0031] Inside the syringe 101, a push block 105 with a spring 106 is added. The push block 105 can maintain the smooth movement of the piston 102 and limit the position of the piston 102.

[0032] Furthermore, the end of the push block 105 is engaged with the end of the piston 102, and the end of the spring 106 is in elastic contact with the side wall of the piston 102.

[0033] The push block 105 and the spring 106 are installed at the end of the piston 102 to maintain the smooth movement of the piston 102 and prevent the piston 102 from getting stuck.

[0034] Furthermore, the blood collection assembly 100 also includes a housing 107 that snaps onto the side wall of the syringe 101, and a plug 108 installed at the end of the housing 107.

[0035] Among them, a detachable outer shell 107 is added to connect with the syringe 101, which facilitates the adjustment of the blood collection process of the syringe 101 and ensures that blood can be collected stably inside the syringe 101.

[0036] Preferably, the end of the plug 108 is sealed and inserted into the end of the syringe 101, and the plug 108 is in communication with the inside of the syringe 101.

[0037] The plug 108 connects to the syringe 101, which can maintain the balance of air pressure inside the syringe 101 and also facilitates connection with the air extraction device to assist in air extraction inside the syringe 101.

[0038] It should be noted that the blood collection assembly 100 also includes an air pump 109 installed inside the housing 107, and the air inlet of the air pump 109 is connected to the plug 108 through a pipe.

[0039] An air pump 109 is added inside the outer casing 107 to draw air from inside the syringe 101 via the plug 108 to assist in blood collection.

[0040] Preferably, the blood collection assembly 100 further includes a rubber stopper 110 encapsulated at the end of the syringe 101, and the rubber stopper 110 is sealed and fitted at the end of the cannula 103.

[0041] The syringe 101 is fitted with a rubber stopper 110 that mates with the end of the cannula 103. After the cannula 103 is removed, the rubber stopper 110 can maintain the sealing performance of the end connection of the syringe 101.

[0042] During use, medical personnel accurately insert the needle 104 of the blood collection needle into the patient's vein. Venous blood pressure causes blood to flow naturally into the syringe 101 of the blood collection needle. The needle 104 is usually connected to a blood collection tube. Under negative pressure, blood is continuously drawn into the blood collection tube, completing the blood collection process. Before entering the blood collection tube, the blood first passes through the filter element 202 inside the blood collection needle. The filter element 202 is made of special filter materials, such as microporous membranes or fiber filters. Impurities in the blood, such as tissue fragments, fibrin, and platelet aggregates, are intercepted on one side of the filter element 202 by the filter medium, while pure blood can pass smoothly through the filter medium and enter the blood collection tube.

[0043] In summary, the filtration structure effectively intercepts these impurities, ensuring a purer blood sample, reducing interference from impurities in subsequent blood test results, and improving test accuracy. While filtering impurities, it also protects blood cells, preventing them from rupturing due to excessive pressure or friction, thus ensuring cell integrity and facilitating more accurate cell morphology observation and related tests. Filtering blood before it enters the blood collection tube prevents potentially clogging substances from entering, ensuring a smooth blood collection process and reducing collection time. It allows blood to pass more smoothly through the lancet, reducing blood turbulence and shear force, thereby lowering the risk of hemolysis and improving blood collection safety. Because the collected blood sample is purer, no additional complex processing is needed to remove impurities before testing, allowing for direct testing, significantly improving testing efficiency and shortening report generation time. Pure blood samples reduce the consumption of testing reagents and also lower the probability of test failures due to impurities requiring resampling and testing, thus reducing testing costs to some extent.

[0044] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0045] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0046] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A disposable blood collection needle with a filtering structure, characterized in that: include, The blood collection assembly (100) includes a syringe (101), a piston (102) movably installed inside the syringe (101), a cannula (103) inserted into the end of the syringe (101), and a needle (104) inserted into the end of the cannula (103). The filter assembly (200) includes a plug (201) that is movably inserted into the side wall of the sleeve (103), a filter element (202) that is snapped into the middle of the plug (201), and a washer (203) that is fixedly sleeved on the side wall of the plug (201). The end of the plug (201) is in sealed contact with the inner wall of the syringe (101).

2. The disposable blood collection needle with a filtering structure according to claim 1, characterized in that: The blood collection assembly (100) also includes a push block (105) that is movably inserted into the syringe (101), and a spring (106) installed at the end of the push block (105).

3. A disposable blood collection needle with a filtering structure according to claim 2, characterized in that: The end of the push block (105) is engaged with the end of the piston (102), and the end of the spring (106) is in elastic contact with the side wall of the piston (102).

4. A disposable blood collection needle with a filtering structure according to claim 3, characterized in that: The blood collection assembly (100) also includes a housing (107) snapped onto the side wall of the syringe (101) and a plug (108) installed at the end of the housing (107).

5. A disposable blood collection needle with a filtering structure according to claim 4, characterized in that: The end of the plug (108) is sealed and inserted into the end of the syringe (101), and the plug (108) communicates with the inside of the syringe (101).

6. A disposable blood collection needle with a filtering structure according to claim 5, characterized in that: The blood collection assembly (100) also includes an air pump (109) installed inside the housing (107), the air pump (109) having an air inlet connected to the plug (108) via a pipe.

7. A disposable blood collection needle with a filtering structure according to claim 6, characterized in that: The blood collection assembly (100) also includes a rubber stopper (110) encapsulated at the end of the syringe (101), the rubber stopper (110) being sealed and fitted at the end of the cannula (103).

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