Internal arteriovenous fistula puncture needle

Abstract

The utility model discloses an internal arteriovenous fistula puncture needle. The internal arteriovenous fistula puncture needle comprises a hose, a puncture needle body detachably installed at one end of the hose, a connector arranged at the other end of the hose and a valve deck detachably installed on the connector, the connector is communicated with the hose, a hydrophobic film is arranged in the valve deck, and the connector is communicated with the hose. A through hole used for communicating the connector with external air pressure is formed in the position, corresponding to the hydrophobic film, of the valve deck. The puncture needle is communicated with a hose through a connector, a valve cover is arranged on the connector, a hydrophobic film is arranged in the valve cover, and a through hole is formed in the position, corresponding to the hydrophobic film, of the valve cover, so that the hose can form a loop communicated with external air pressure, and the puncture needle has the pressure reduction function; through a hydrophobic membrane in the valve cover, gas can pass through the valve cover, the blood pressure of the human body is blocked, and the situation that the blood of the human body splashes outwards is effectively prevented; and the valve cover is detachably connected with the connector, so that connection with an extracorporeal circulation loop is facilitated, and the mounting efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to an arteriovenous fistula puncture needle. Background Technology

[0002] Hemodialysis is one of the most commonly used medical procedures in hospitals, used to treat conditions such as renal failure, acute pancreatitis, severe hepatitis, and postoperative liver failure. After arteriovenous puncture for hemodialysis, the most basic requirement for medical staff is safe puncture when performing dialysis on patients. Arteriovenous fistulas (AVFs) are the main type of vascular access for maintenance hemodialysis patients in my country, and the AVF puncture needle is an indispensable link connecting the AVF to the extracorporeal circulation.

[0003] However, if the needle is missed during arteriovenous fistula puncture and decompression is not relieved in time, it can lead to significant hematoma formation. In severe cases, it may cause loss of arteriovenous fistula function. This risk is more prominent in the early stages of fistula formation. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an arteriovenous fistula puncture needle, which aims to solve the technical problem that the existing arteriovenous fistula puncture needles cannot achieve decompression, resulting in hematoma in patients.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an arteriovenous fistula puncture needle, comprising:

[0006] hose;

[0007] A puncture needle is detachably attached to one end of the tubing;

[0008] A connector is located at the other end of the flexible tube;

[0009] The valve cover is detachably mounted on the connector.

[0010] The connector is connected to the hose, the valve cover is provided with a hydrophobic membrane, and the valve cover has a through hole corresponding to the position of the hydrophobic membrane for connecting the connector to external air pressure.

[0011] Furthermore, the valve cover includes a valve cover body and a mounting platform disposed on the valve cover body. The mounting platform is hollow inside, the hydrophobic membrane is placed inside the mounting platform, and the through hole is formed on the valve cover body.

[0012] Furthermore, the valve cover body is integrally formed with the mounting platform.

[0013] Furthermore, the mounting platform is provided with a slot for placing the hydrophobic membrane.

[0014] Furthermore, the mounting platform is provided with external threads, and the connector is provided with internal threads. The mounting platform and the connector are connected by threaded engagement.

[0015] Furthermore, the thickness of the hydrophobic film is 2-3 mm.

[0016] Furthermore, the connector includes a connecting body and a boss disposed on the end of the connecting body away from the hose. The boss is provided with the internal thread.

[0017] Furthermore, the valve cover body and the boss are connected by threads.

[0018] Furthermore, the puncture needle is also provided with needle wings to facilitate puncture positioning.

[0019] The beneficial effects of this utility model are as follows: Compared with the prior art, the arteriovenous fistula puncture needle of this utility model is connected to a tubing via a connector. The connector is equipped with a valve cover, which contains a hydrophobic membrane. A through hole is opened on the valve cover corresponding to the position of the hydrophobic membrane, thereby forming a circuit that allows the tubing to conduct external air pressure, enabling the puncture needle to have a decompression function. Through the hydrophobic membrane in the valve cover, gas can pass through while blocking human blood, effectively preventing the splashing of human blood pressure. The valve cover and connector are detachably connected, which facilitates connection with the extracorporeal circulation circuit and improves installation efficiency.

[0020] Other advantages, objectives, and features of this invention will be set forth in the following description and will be apparent to those skilled in the art to some extent, or may be learned by practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0021] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0022] Figure 1 This is a schematic diagram of the first partial structure of an arteriovenous fistula puncture needle according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the valve cover structure according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the connector structure according to an embodiment of the present invention;

[0025] Figure 4 This is a top view of the valve cover from a first perspective according to an embodiment of the present invention.

[0026] Figure 5 This is a top view of the valve cover from a second perspective according to an embodiment of the present invention.

[0027] Icon labels:

[0028] 1- Hose;

[0029] 2-Puncture needle;

[0030] 3-Connector; 31-Connector body; 32-Boss;

[0031] 4-Valve cover; 41-Through hole; 42-Valve cover body; 43-Mounting platform;

[0032] 5-Hydrophobic film;

[0033] 6-Needle wing. Detailed Implementation

[0034] like Figures 1 to 5 As shown, this embodiment proposes an arteriovenous fistula puncture needle, including a flexible tube 1, a puncture needle 2, a connector 3, and a valve cover 4. The puncture needle 2 is detachably installed at one end of the flexible tube 1, the connector 3 is disposed at the other end of the flexible tube 1, and the valve cover 4 is detachably installed on the connector 3. In addition, the connector 3 is connected to the flexible tube 1. The valve cover 4 is provided with a hydrophobic membrane 5, and a through hole 41 is opened at the position corresponding to the hydrophobic membrane 5. The through hole 41 can be used to connect the connector 3 to external air pressure. In this way, the connector 3 is connected to the hose 1. The connector 3 is equipped with a valve cover 4, which contains a hydrophobic membrane 5. The valve cover 4 has a through hole 41 corresponding to the position of the hydrophobic membrane 5, so that the hose 1 can form a circuit that conducts air pressure with the external air pressure, so that the puncture needle 2 has a decompression function. Through the hydrophobic membrane 5 in the valve cover 4, gas can pass through and human blood can be blocked, effectively preventing human blood from splashing out. The valve cover 4 and the connector 3 are detachably connected, which facilitates connection with the extracorporeal circulation circuit and improves installation efficiency.

[0035] In this application, since the connector 3 is connected to the hose 1, the valve cover 4 is connected to the connector 3 through the through hole 41 to conduct external air pressure, thereby forming a connected air pressure circuit between the hose 1 and the external air pressure, so that the puncture needle 2 is kept in a depressurized state when the needle leaks during puncture, thus avoiding the formation of hematoma in the patient; in addition, the puncture needle 2 and the hose 1 are detachably connected, which makes it easy to collect and organize the puncture needle 2 and the hose 1.

[0036] Further, please refer to Figure 2As shown, the valve cover 4 includes a valve cover body 42 and a mounting platform 43. The mounting platform 43 is disposed on the valve cover body 42. Furthermore, the mounting platform 43 is hollow inside, and the hydrophobic membrane 5 is placed inside the mounting platform 43. The through hole 41 is formed on the valve cover body 42. In this way, the hollow mounting platform 43 facilitates the placement of the hydrophobic membrane 5. The mounting platform 43 can extend into the connector 3 to achieve the connection between the mounting platform 43 and the connector 3. In addition, the hollow interior of the mounting platform 43 allows it to communicate with the through hole 41 on the valve cover body 42, thereby establishing a pressure relief circuit with the external air pressure and achieving the function of pressure reduction.

[0037] Preferably, the valve cover body 42 and the mounting platform 43 are integrally formed. This integral forming reduces subsequent machining and lowers processing costs. Of course, in this application, depending on the actual situation and specific needs, the valve cover body 42 and the mounting platform 43 can also be detached and connected; this is not the only possible arrangement.

[0038] Preferably, the mounting platform 43 is provided with a slot, through which the hydrophobic membrane 5 can be placed, so that the hydrophobic membrane 5 is installed relatively stably in the mounting platform 43, so that the hydrophobic membrane 5 has a certain impact resistance and can withstand the pressure of blood well.

[0039] Further, please refer to Figure 3 As shown, the mounting platform 43 has external threads, and the connector 3 has internal threads. The mounting platform 43 and the connector 3 are connected by a threaded connection. This threaded connection facilitates the assembly of the mounting platform 43 and the connector 3, making the process simple, convenient, and improving installation efficiency.

[0040] Preferably, the thickness of the hydrophobic film 5 is 2-3 mm. Specifically, the thickness of the hydrophobic film 5 can be 2 mm, 2.2 mm, 2.4 mm, 2.5 mm, 2.8 mm, 3 mm, etc. By setting a certain thickness, the impact resistance of the hydrophobic film 5 is enhanced. Of course, in this application, the thickness of the hydrophobic film 5 can also be set to other values ​​according to the actual situation and specific needs, and is not limited here.

[0041] Further, please refer to Figure 3 As shown, the connector 3 includes a connecting body 31 and a boss 32. The boss 32 is located at the end of the connecting body 31 away from the hose 1, and the boss 32 has an internal thread. The internal thread on the boss 32 enables threaded connection with the mounting platform 43.

[0042] Preferably, the valve cover body 42 and the boss 32 are connected by threads. In this application, the internal thread of the boss 32 is engaged with the external thread of the mounting platform 43; the internal thread of the valve cover body 42 is engaged with the external thread of the outer wall of the boss 32. Through the double thread connection, the stable connection between the valve cover 4 and the connector 3 is effectively guaranteed.

[0043] Further, please refer to Figure 1 As shown, the puncture needle 2 is also equipped with needle wings 6 to facilitate puncture positioning. The needle wings 6 allow the tiny needle tip to have a more precise landing point, avoiding angular errors.

[0044] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A puncture needle for arteriovenous fistula, characterized in that, include: hose; A puncture needle is detachably attached to one end of the tubing; A connector is located at the other end of the flexible tube; The valve cover is detachably mounted on the connector. The connector is connected to the hose, the valve cover is provided with a hydrophobic membrane, and the valve cover has a through hole corresponding to the position of the hydrophobic membrane for connecting the connector to external air pressure.

2. The arteriovenous fistula puncture needle according to claim 1, characterized in that, The valve cover includes a valve cover body and a mounting platform disposed on the valve cover body. The mounting platform is hollow inside, the hydrophobic membrane is placed inside the mounting platform, and the through hole is opened on the valve cover body.

3. The arteriovenous fistula puncture needle according to claim 2, characterized in that, The valve cover body is integrally formed with the mounting platform.

4. The arteriovenous fistula puncture needle according to claim 2, characterized in that, The mounting platform is equipped with a slot for placing the hydrophobic membrane.

5. The arteriovenous fistula puncture needle according to claim 2, characterized in that, The mounting platform is provided with external threads, and the connector is provided with internal threads. The mounting platform and the connector are connected by threaded engagement.

6. The arteriovenous fistula puncture needle according to claim 1, characterized in that, The thickness of the hydrophobic film is 2-3 mm.

7. The arteriovenous fistula puncture needle according to claim 5, characterized in that, The connector includes a connecting body and a boss located on the end of the connecting body away from the hose. The boss is provided with the internal thread.

8. The arteriovenous fistula puncture needle according to claim 7, characterized in that, The valve cover body and the boss are connected by threads.

9. The arteriovenous fistula puncture needle according to claim 7, characterized in that, The puncture needle is also equipped with needle wings to facilitate puncture positioning.

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