Internal arteriovenous fistula puncture needle

Abstract

The internal arteriovenous fistula puncture needle comprises a puncture needle body, a connecting part is arranged at the rear end of the puncture needle body, and a flow channel is formed in the puncture needle body; the needle cap is arranged on the puncture needle body in a covering mode, a protruding positioning part is arranged at the tail end of the needle cap, and the diameter of the positioning part is smaller than 1 mm; the guide pipe is connected to the connecting part, the guide pipe is communicated with the flow channel, a scale strip is arranged on the guide pipe, and the scale strip comprises a plurality of scale marks which divide the distance between 0 cm and 1 cm into five equal parts or ten equal parts; and the angle gauge comprises a mounting part and an instrument part, and the angle gauge is detachably arranged on the connecting part through the mounting part. According to the internal arteriovenous fistula puncture needle, before puncture, the catheter can be used for measuring the distance, the positioning part of the needle cap is used for marking and positioning, a paper ruler does not need to be additionally taken, the puncture needle is convenient and practical, the detachable angle gauge is arranged on the puncture needle, the needle inserting angle of the puncture needle can be accurately displayed through the angle gauge when the puncture needle is inserted, and the success rate of a puncture operation is increased.

Description

Technical Field

[0001] This application relates to the field of medical devices, and particularly to an arteriovenous fistula puncture needle. Background Art

[0002] An arteriovenous fistula is the "lifeline" of maintenance hemodialysis (MHD) patients. The Dialysis Outcomes and Practice Patterns Study (DOPPS) shows that 88.2% of MHD patients in China use arteriovenous fistulas as vascular access, and the ladder puncture method is the preferred puncture method. The ladder puncture method refers to puncturing at planned puncture points, which are evenly distributed on the arteriovenous fistula blood vessel at regular time intervals and distances, to avoid vascular damage caused by repeated local punctures and complications such as vascular stenosis, aneurysm-like dilatation, and scarring. In modern clinical practice, the specific operation of the ladder puncture method is as follows: Before puncture, a paper ruler is used to measure the distance between puncture sites to determine the puncture position, ensuring that the puncture sites are linearly and equidistantly distributed, and then puncture is performed. The disadvantage of this method is that a paper ruler needs to be fetched separately each time before puncture, which is troublesome and time-consuming. The medical staff in charge are likely to directly estimate by eye without fetching the paper ruler for measurement because they find it troublesome, turning the ladder puncture into local puncture and leading to the occurrence of arteriovenous fistula complications.

[0003] In addition, when the existing puncture needle is inserted, it is difficult to accurately grasp the angle of the puncture needle. If the puncture angle of the puncture needle needs to be measured, it is usually necessary to fixedly connect the puncture needle to other larger auxiliary devices or instruments, reducing the portability of the puncture needle. Also, the larger auxiliary devices and instruments are likely to cause the puncture needle to deviate during puncture, thus affecting the success rate of the puncture operation and requiring multiple punctures, increasing the patient's pain.

[0004] Therefore, it is necessary to propose a new type of arteriovenous fistula puncture needle. Utility Model Content

[0005] To solve one of the technical problems existing in the prior art, this application provides an arteriovenous fistula puncture needle. A scale bar is provided on the catheter, and a positioning part is provided on the needle cap. Before puncture, the distance can be measured using the catheter and the position can be marked with the needle cap, eliminating the need to fetch a paper ruler separately, which is convenient and practical. A detachable angle gauge is provided on the puncture needle, which can accurately display the puncture angle of the puncture needle, improving the success rate of the puncture operation.

[0006] An arteriovenous fistula puncture needle according to an embodiment of the first aspect of the present utility model includes

[0007] A puncture needle body, with a pointed end for puncture provided at the front end of the puncture needle body, a connecting part provided at the rear end of the puncture needle body, and a flow channel formed inside the puncture needle body;

[0008] A needle cap, which is sleeved on the puncture needle body to surround the puncture needle body. The needle cap is configured to be detachable from the puncture needle body. A raised positioning portion is provided at the end of the needle cap, and the diameter of the positioning portion is less than 1 mm;

[0009] A catheter, which is connected to the connecting portion and communicates with the flow channel. The catheter is made of a transparent flexible material. A scale bar is provided on the catheter, and the scale bar is arranged at one end of the catheter away from the puncture needle body. The scale bar includes a plurality of scale marks that divide the distance between 0 - 1 cm into five equal parts or ten equal parts;

[0010] An angle gauge, which includes a mounting portion and a gauge portion. The mounting portion and the gauge portion are fixedly connected. The angle gauge is detachably arranged on the connecting portion through the mounting portion. The gauge portion includes a scale disk for indicating an angle, an indicating needle arranged on the scale disk, and a pendulum connected to the indicating needle.

[0011] The arteriovenous fistula puncture needle according to the first aspect embodiment of the present invention has at least the following beneficial effects: The arteriovenous fistula puncture needle of the present application is provided with a scale bar on the catheter and a positioning portion on the needle cap. Before puncture, the distance can be measured by the catheter and the positioning portion of the needle cap can be used for marking and positioning, without the need to take another paper ruler, which is convenient and practical. A detachable angle gauge is provided on the puncture needle. When the angle gauge is installed on the puncture needle body, during the puncture of the puncture needle, the angle gauge can accurately display the puncture angle of the puncture needle, improving the success rate of the puncture operation; after the operation, the angle gauge can be disassembled and placed separately, improving the portability of the puncture needle.

[0012] For the arteriovenous fistula puncture needle according to the first aspect of the present invention, the scale bar on the catheter includes a plurality of scale marks that divide the distance between 0 - 10 cm into two equal parts or ten equal parts.

[0013] For the arteriovenous fistula puncture needle according to the first aspect of the present invention, the scale bar on the catheter includes a plurality of scale marks that divide the distance between 0 - 15 cm into three equal parts or fifteen equal parts.

[0014] For the arteriovenous fistula puncture needle according to the first aspect of the present invention, the "0" scale mark of the scale bar is arranged at one end of the catheter away from the puncture needle body.

[0015] For the arteriovenous fistula puncture needle according to the first aspect of the present invention, the mounting portion includes a buckle or a clip.

[0016] According to the arteriovenous fistula puncture needle described in the first aspect of the present utility model, the instrument part includes a housing, the housing is composed of an upper housing and a lower housing, the upper housing is made of a transparent material, and the scale disk is arranged on the upper housing.

[0017] According to the arteriovenous fistula puncture needle described in the first aspect of the present utility model, the pendulum is rotatably arranged inside the lower housing through a rotating shaft.

[0018] Other features and advantages of the present application will be described in the following description, and, in part, will be obvious from the description, or will be understood by implementing the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures specifically pointed out in the description, claims, and drawings. Description of the Drawings

[0019] The drawings are used to provide a further understanding of the technical solutions of the present application, and constitute a part of the description. Together with the embodiments of the present application, they are used to explain the technical solutions of the present application, and do not constitute a limitation to the technical solutions of the present application.

[0020] Figure 1 It is a schematic structural view of the arteriovenous fistula puncture needle provided by the present application.

[0021] Figure 2 is Figure 1 an exploded view of the instrument part in

[0022] Explanation of the Reference Numerals in the Drawings:

[0023] Puncture needle body 100, tip part 110, connection part 120, needle cap 200, positioning part 210, catheter 300, scale bar 310, angle gauge 400, installation part 410, buckle 411, instrument part 420, upper housing 421, scale disk 4211, lower housing 422, insertion block 4221, pendulum 423, indicating needle 424. Detailed Embodiments

[0024] In order to make the objectives, technical solutions, and advantages of the present application clearer, the following further details the present application in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection or a connection capable of mutual communication; it can be directly connected, or indirectly connected through an intermediate medium or intermediate structure, and can be the communication inside two components, indirect communication or the interaction relationship between two components.

[0026] In the description of the present application, it should be noted that the meaning of "several" is one or more, the meaning of "multiple (or multiple items)" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first", "second", etc., it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0027] The following Figure 1 and Figure 2 will be used to further elaborate on the embodiments of the arteriovenous fistula puncture needle of the present application.

[0028] Referring to Figure 1 , the present application provides an embodiment of an arteriovenous fistula puncture needle, including a puncture needle body 100, a needle cap 200, a catheter 300, and a protractor 400.

[0029] Specifically, as Figure 1 shown, a pointed end portion 110 for puncture is provided at the front end of the puncture needle body 100, a connecting portion 120 is provided at the rear end of the puncture needle body 100, and the puncture needle body 100 is hollow inside, forming a flow channel for blood to flow through.

[0030] As Figure 1 shown, the needle cap 200 usually covers the puncture needle body 100, and the needle cap 200 at least surrounds the pointed end portion 110 of the puncture needle body 100 to protect the pointed end portion 110 of the puncture needle body 100; the needle cap 200 is set to be detachable from the puncture needle body 100. During the puncture process, the needle cap 200 is removed before inserting the needle, and the exposed pointed end portion 110 is used for puncture. A raised positioning portion 210 is provided at the end of the needle cap 200, and the diameter of the positioning portion 210 is less than 1 mm.

[0031] As Figure 1As shown, the catheter 300 is connected to the connecting portion 120. The catheter 300 is in communication with the flow channel. The function of the catheter 300 is to connect the puncture needle body 100 with a collection test tube or other instruments. Preferably, the catheter 300 is made of a transparent flexible material. The catheter 300 made of the flexible material can withstand bending, deformation, etc., and is suitable for clinical use. The transparent design facilitates observing the blood flow in the tube. In the present application, a scale bar 310 is provided on the catheter 300. The scale bar 310 is provided at one end of the catheter 300 away from the puncture needle body 100. The length of the scale bar 310 is generally 10 cm or 15 cm, and a scale mark is provided every 1 cm or 5 cm on the scale bar 310. Specifically, when the length of the scale bar 310 is 10 cm and a scale mark is provided every 1 cm on the scale bar 310, the scale marks divide the distance between 0 - 10 cm into ten equal parts, as shown in Figure 1 the embodiment shown; when the length of the scale bar 310 is 10 cm and a scale mark is provided every 5 cm on the scale bar 310, the scale marks divide the distance between 0 - 10 cm into two equal parts; when the length of the scale bar 310 is 15 cm and a scale mark is provided every 1 cm on the scale bar 310, the scale marks divide the distance between 0 - 15 cm into fifteen equal parts; when the length of the scale bar 310 is 15 cm and a scale mark is provided every 5 cm on the scale bar 310, the scale marks divide the distance between 0 - 15 cm into three equal parts. Among them, for the convenience of reading, numbers are marked at the scale mark positions at 0, 5, 10, 15 cm, etc. Only a small line needs to be marked at the remaining scale marks, so as not to affect observing the blood flow situation after puncture. Further, in the present application, the "0" scale mark of the scale bar 310 is preferably provided at one end of the catheter 300 away from the puncture needle body 100, and the scale bar 310 further includes a plurality of scale marks that divide the distance between 0 - 1 cm into five or ten equal parts. The scale marks are indicated by small lines. It should be noted that since the distance between arteriovenous fistula puncture points is generally 0.5 cm - 1 cm, a plurality of equally spaced scale marks are provided between 0 - 1 cm of the scale bar 310, which can accurately measure the distance between puncture points; and the scale bar 310 for accurate measurement is designed at the end of the catheter 300, which is convenient for fixing and positioning the puncture point.

[0032] As Figure 1 shown, the angle gauge 400 includes a mounting portion 410 and a meter portion 420. Among them, the mounting portion 410 includes a buckle 411 or a clip. The angle gauge 400 is buckled on the connecting portion 120 through the buckle 411 of the mounting portion 410, or clamped on the connecting portion 120 through the clip of the mounting portion 410. It should be noted that using the buckle 411 or the clip to fix the angle gauge 400 on the connecting portion 120 facilitates disassembly and assembly. The mounting portion 410 and the meter portion 420 are fixedly connected. AsFigure 2 As shown in the figure, the instrument part 420 includes a housing, a pendulum 423 and an indicating needle 424. The housing is composed of an upper housing 421 and a lower housing 422. The upper housing 421 is made of a transparent material, and an arc-shaped scale 4211 is provided on the upper housing 421 for indicating the angle. The pendulum 423 is rotatably arranged inside the lower housing 422 through a rotating shaft. One end of the indicating needle 424 is fixedly connected to the pendulum 423, and the other end of the indicating needle 424 is a free end that can swing at the scale 4211. It should be noted that in this application, the housing of the instrument part 420 will rotate according to the operation of the medical staff (adjusting the puncture needle insertion angle), and the pendulum 423 will remain vertical under its own gravity, so as to ensure that the indicating needle 424 always points upward. After the scale 4211 rotates, the indicating needle 424 always points to the angle scale located above in real time. This angle scale is the needle insertion angle, which is convenient for the medical staff to read and adjust the needle insertion angle of the puncture needle body 100.

[0033] Further, a plug-in block 4221 is provided at the lower part of the lower housing 422, and the lower housing 422 is fixedly connected to the installation part 410 through the plug-in block 4221.

[0034] The use process of the arteriovenous fistula puncture needle of this application is as follows: The first step is to measure the distance between the puncture points using the scale bar 310 on the catheter 300 before puncture to achieve the purpose of ladder puncture; the second step is to bend the needle cap 200 at the other end of the catheter 300 by using the flexibility of the catheter 300 after measuring the distance, and use the positioning part 210 to mark and position the measured puncture point (press hard to leave a mark). The mark remains clearly visible after disinfection. It should be noted that since the diameter of the positioning part 210 is less than 1 mm, the positioning will be more accurate, which can avoid the problem of inaccurate puncture points caused by too large marks, thus realizing accurate positioning; the third step is to remove the needle cap 200 after positioning, expose the puncture needle body 100, use the angle gauge 400 to read and adjust the needle insertion angle of the puncture needle body 100, and perform puncture at an appropriate needle insertion angle to improve the success rate of the puncture operation. Finally, after successful puncture, the angle gauge 400 can also be disassembled and placed separately to improve the practicality and portability of the puncture needle.

[0035] Using the arteriovenous fistula puncture needle of this application for puncture surgery can achieve the purpose of ladder puncture without taking another paper ruler, which is convenient, practical, time-saving and labor-saving, and can greatly improve the execution rate of ladder puncture; at the same time, a detachable angle gauge 400 is provided on the puncture needle. Through the angle gauge 400, the needle insertion angle of the puncture needle can be accurately read and adjusted to improve the success rate of the puncture operation. After the operation, the angle gauge 400 can also be disassembled and placed separately to improve the portability of the puncture needle.

[0036] The above is a specific description of the preferred embodiment of the present application. However, the present application is not limited to the above-mentioned implementation manners. Those skilled in the art can also make various equivalent deformations or substitutions under the condition of not violating the spirit of the present application. These equivalent deformations or substitutions are all included within the scope defined by the claims of the present application.

Claims

1. An arteriovenous fistula puncture needle, characterized in that: include: A puncture needle body, wherein the front end of the puncture needle body is provided with a tip portion for puncture, the rear end of the puncture needle body is provided with a connecting portion, and a flow channel is formed inside the puncture needle body; A needle cap, the needle cap is arranged on the puncture needle body to surround the puncture needle body, the needle cap is arranged to be detachable from the puncture needle body, a raised positioning portion is arranged at the end of the needle cap, and the diameter of the positioning portion is less than 1 mm; A catheter, the catheter is connected to the connecting part, the catheter is in communication with the flow channel, the catheter is made of a transparent flexible material, a scale bar is arranged on the catheter, the scale bar is arranged at one end of the catheter away from the puncture needle body, and the scale bar includes a plurality of scale marks that divide the distance between 0-1 cm into five or ten equal parts; An inclinometer, the inclinometer comprises a mounting portion and an instrument portion, the mounting portion and the instrument portion are fixedly connected, the inclinometer can be detachably arranged on the connecting portion through the mounting portion, the instrument portion comprises a dial for indicating an angle, an indicator needle arranged on the dial, and a pendulum connected to the indicator needle.

2. The arteriovenous fistula puncture needle according to claim 1, characterized in that: The scale bar on the catheter includes a plurality of scale marks that divide the distance between 0-10 cm into two or ten equal parts.

3. The arteriovenous fistula puncture needle according to claim 1, characterized in that: The scale bar on the catheter includes a plurality of scale marks that divide the distance between 0-15 cm into three or fifteen equal parts.

4. The arteriovenous fistula puncture needle according to any one of claims 1 to 3, characterized in that: The "0" scale mark of the scale bar is arranged at an end of the catheter away from the puncture needle body.

5. The arteriovenous fistula puncture needle according to claim 1, characterized in that: The mounting portion includes a buckle or a clip.

6. The arteriovenous fistula puncture needle according to claim 1, characterized in that: The instrument part comprises a shell, which is composed of an upper shell and a lower shell. The upper shell is made of a transparent material, and the dial is arranged on the upper shell.

7. The arteriovenous fistula puncture needle according to claim 6, characterized in that: The pendulum is rotatably arranged inside the lower shell body via a rotating shaft.

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