Cardiovascular intervention injector

Abstract

The utility model provides a cardiovascular intervention injector, which belongs to the technical field of medical instruments and comprises an injection tube, an injection pushing piston, a pushing component and a pushing plate, the injection tube is cylindrical, the injection pushing piston is slidably connected inside the injection tube, and the pushing component is arranged on the pushing plate. The pushing assembly is arranged on one side of the injection pushing piston, the pushing assembly comprises two regular hexagonal prism rods, one ends of the regular hexagonal prism rods extend to the outside of the injection tube and are fixedly connected with the pushing plate, and the surface of the pushing plate is provided with textures convenient for fingers to press; the injection pushing piston is used for receiving external force and driving the pushing assembly, and the injection pushing piston slides along the inner wall of the injection tube; the utility model provides a cardiovascular intervention injector which can solve the problem that the injection distance of an existing cardiovascular intervention injector is not accurate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to a cardiovascular intervention push injector. BACKGROUND

[0002] A cardiovascular intervention push injector is a device used in cardiovascular intervention therapy to help doctors accurately inject drugs or contrast agents. This kind of device can help quickly and stably inject drugs or contrast agents during cardiac intervention surgery, ensuring the smooth progress of diagnosis and treatment. Intervention push injectors usually need to provide high pressure, especially when injecting contrast agents, to ensure that drugs or contrast agents can be smoothly injected into blood vessels. Most push injectors are designed with multiple safety protection systems to prevent injection failure or potential harm to patients caused by excessive or insufficient pressure.

[0003] A cardiovascular intervention push injector is disclosed in Chinese Patent No. CN215231089U (Application No. CN202120402703.2), which includes an injection tube, an injection piston slidably connected inside the injection tube, a push rod installed on the right side wall of the injection piston, a push plate fixedly connected to the right end of the push rod extending outside the injection tube, a connecting head installed on the left end of the injection tube, a threaded tube installed on the left end of the connecting head, an injection needle installed on the left end of the threaded tube, an adjusting tube screwedly connected to the outside of the threaded tube, and a limiting plate installed outside the injection needle. This cardiovascular intervention push injector not only controls the depth of push injection, but also adjusts and controls the injection amount of liquid medicine according to the actual needs of patients to ensure the accuracy of intervention therapy drug injection, making it more convenient to control, and the entire device has a simple structure, low production cost, and is conducive to popularization and use. However, the push injection distance is difficult to accurately grasp, and the push injection pressure may be too large or too small. SUMMARY

[0004] Therefore, the utility model provides a cardiovascular intervention push injector, which can solve the problem of inaccurate push injection distance of the existing cardiovascular intervention push injector.

[0005] The utility model is implemented as follows:

[0006] The utility model provides a kind of cardiovascular intervention pusher, wherein, including injection tube, injection push piston, push assembly and push plate, the injection tube is cylindrical, the injection push piston is slidably connected in the inside of the injection tube, the injection push piston side is provided with the push assembly, the push assembly includes two regular hexagonal prism rods, one end extends to the outside of the injection tube and is fixedly connected with the push plate, the surface of the push plate is provided with texture for finger pressing, for receiving external force and driving the push assembly, the injection push piston slides along the inner wall of the injection tube.

[0007] Based on the above technical solutions, the cardiovascular intervention pusher of the utility model can be further improved as follows:

[0008] Among them, two the push assembly is parallelly arranged, and a plurality of transverse connecting rods are arranged at the middle position, the transverse connecting rods are evenly distributed, for enhancing the stability and rigidity of the push assembly.

[0009] Further, the top wall and the bottom wall of the injection tube are provided with a plurality of limiting protrusions, the limiting protrusions are semicircular in shape, for indicating the pushing position of the injection push piston, the limiting protrusions are made of rubber material, and the thickness of the limiting protrusions is less than 1 / 5 of the radius of the injection push piston.

[0010] Further, the injection push piston includes a three-layer structure, from inside to outside, a sealing layer, an equalizing layer and a pushing layer, the sealing layer, the equalizing layer and the pushing layer are integrally connected.

[0011] Further, the elastic coefficient of the equalizing layer is between the sealing layer and the pushing layer, for uniformly distributing and transmitting the pushing force received by the pushing layer to the sealing layer, to push the sealing layer to move in parallel.

[0012] Further, one end of the pushing layer is fixedly connected with the push assembly.

[0013] Further, the sealing layer is made of a silicon rubber ring with a trapezoidal cross section, the wide base of the trapezoidal cross section faces the main body of the injection push piston, and the narrow top edge faces the inner wall of the injection tube, for increasing the contact area of the sealing layer and the inner wall of the injection tube, while reducing the frictional resistance.

[0014] Further, a threaded connector is arranged on the side of the injection tube away from the push assembly, the injection port is a conical structure, and a thread is arranged on the side wall thereof, for connecting an injection needle.

[0015] Further, a limiting plate is arranged on the sidewall of the threaded connector, the limiting plate is a disc-shaped structure, and is inclined to one side of the injection tube to form an included angle of 15-25° with the injection port.

[0016] Further, the tube wall thickness of the injection tube is 1-2 mm, the length is 150-300 mm, and the outer diameter is 10-20 mm; the injection tube is made of a medical-grade polycarbonate material and is used for observing the internal liquid flow.

[0017] A scale line is arranged on the outer wall of the injection tube, and the scale line is uniformly distributed and used for indicating the fluid volume in the injection tube.

[0018] Compared with the prior art, the beneficial effects of the cardiovascular intervention push injector provided by the utility model are as follows:

[0019] The injection tube is in a cylindrical shape and mainly serves as a channel for liquid flow. The injection tube provides a sliding surface for the injection push piston through the inner wall thereof and indicates the fluid volume through the scale line on the outer wall, so that the injection progress and the remaining amount of the liquid can be observed by the doctor. The injection tube is made of a medical-grade polycarbonate material and has transparency, so that the liquid flow in the tube can be clearly observed. The tube wall thickness is 1-2 mm, which can ensure the stability and pressure resistance of the structure and does not increase excessive weight.

[0020] The injection push piston is in sliding connection with the injection tube and mainly drives the injection of the liquid through the movement of the push piston. The internal design of the injection push piston is divided into three layers.

[0021] The sealing layer is composed of a trapezoidal cross-section silicon rubber ring, which can effectively increase the contact area with the inner wall of the injection tube, reduce friction, and ensure the sealing property and fluid leakage-free property in the injection process. The trapezoidal cross-section design can adapt to the smooth movement of the piston and ensure low resistance.

[0022] The pressure equalizing layer has an elastic coefficient between the sealing layer and the pushing layer and has the function of uniformly dispersing the pushing force. The pressure equalizing layer ensures that the pushing force is not concentrated in a small area, thereby ensuring the stability of the liquid injection.

[0023] The pushing layer is fixedly connected with the pushing assembly and directly receives the pushing force from the pushing assembly, so as to transmit the pushing force to other layers and ensure the normal work of the entire injection system.

[0024] The pushing assembly is composed of two regular hexagonal prism rods and has high stability and rigidity and can effectively transmit external force. The parallel arrangement of the pushing assembly and the design of the transverse connecting rod in the middle further enhance the stability of the pushing assembly and avoid deformation or uneven force transmission in the pushing process. Through the pushing assembly, the piston can smoothly slide, thereby ensuring that the liquid is stably pushed.

[0025] The push plate is located at the outer end of the push assembly, and the surface thereof is designed with textures facilitating finger pressing, providing good grip feeling and operational convenience. When external force is applied to the push plate, the push plate transmits the external force to the push assembly, thereby pushing the injection push piston to slide along the inner wall of the injection tube, and pushing the drug solution into the target site. The textures designed on the push plate can increase the friction during operation, reduce sliding, and improve control accuracy.

[0026] The top wall and the bottom wall of the injection tube are provided with limiting protrusions in semicircular shape, which serve as an indication for showing the pushing position of the injection push piston. This helps the operator to determine whether the piston has been moved to the predetermined position, preventing over-pushing or piston jamming, and ensuring the accurate injection of the drug solution.

[0027] The side of the injection tube away from the push assembly is provided with a threaded connector for connecting with the injection needle. The threaded connector is provided with threads and a limiting plate, ensuring that the injection needle can be firmly connected and avoiding loosening or leakage during connection. The inclined design of the limiting plate can reduce the angular stress when the injection tube is connected with the injection head, ensuring the smoothness of the injection process.

[0028] The conical structure of the injection port and the threads on the side wall thereof further enhance the connection stability of the syringe and the injection needle, reducing the risk of loose connection or leakage.

[0029] The scale lines on the outer wall of the injection tube are evenly distributed, and the design of these scale lines is used to indicate the fluid volume inside the syringe, allowing the doctor to accurately grasp the amount of injected drug solution. Through these scales, the doctor can clearly understand the remaining drug solution and ensure that the dose of each injection meets the requirements.

[0030] The disc-shaped structure of the limiting plate and the 15-25° included angle formed between the limiting plate and the injection tube help to stabilize the flow direction of the drug solution during operation, reducing injection errors caused by unbalanced pressure. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0032] Fig. 1 It is a structural schematic diagram of a cardiovascular intervention injection device;

[0033] Fig. 2 It is a sectional structure schematic diagram of an injection push piston;

[0034] Fig. 3 A cross-sectional structure diagram of the pushing assembly;

[0035] In the drawings, the components represented by the reference numbers are listed as follows:

[0036] 10, injection tube; 11, threaded connector; 12, limiting protrusion; 20, injection pushing piston; 21, sealing layer; 22, pressure equalizing layer; 23, pushing layer; 30, pushing assembly; 40, pushing plate. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0038] As Figs. 1-3 shown is an embodiment of a cardiovascular intervention pusher provided by the present application, in the embodiment, comprising an injection tube 10, an injection pushing piston 20, a pushing assembly 30 and a pushing plate 40, the injection tube 10 is in a cylindrical shape, the injection pushing piston 20 is slidingly connected inside the injection tube 10, the pushing assembly 30 is arranged on one side of the injection pushing piston 20, the pushing assembly 30 comprises two regular hexagonal prism rods, one end of each of the two regular hexagonal prism rods extends to the outside of the injection tube 10 and is fixedly connected with the pushing plate 40, the surface of the pushing plate 40 is provided with textures convenient for finger pressing, for receiving external force and driving the pushing assembly 30 and the injection pushing piston 20 to slide along the inner wall of the injection tube 10.

[0039] In the above technical scheme, the two pushing assemblies 30 are arranged in parallel, a plurality of transverse connecting rods are arranged at the middle positions, the transverse connecting rods are uniformly distributed, for enhancing the stability and rigidity of the pushing assembly 30.

[0040] Further, in the above technical scheme, a plurality of limiting protrusions 12 are arranged on the top wall and the bottom wall of the injection tube 10, the limiting protrusions 12 are in a semicircular shape, for indicating the pushing position of the injection pushing piston 20, the limiting protrusions 12 are made of rubber, and the thickness of the limiting protrusions 12 is less than 1 / 5 of the radius of the injection pushing piston 20.

[0041] Further, in the above technical scheme, the injection pushing piston 20 comprises a three-layer structure, from inside to outside, the three-layer structure comprises a sealing layer 21, a pressure equalizing layer 22 and a pushing layer 23 in sequence, and the sealing layer 21, the pressure equalizing layer 22 and the pushing layer 23 are integrally connected.

[0042] Further, in the above technical scheme, the elastic coefficient of the pressure equalizing layer 22 is between the sealing layer 21 and the pushing layer 23, for uniformly dispersing the pushing force received by the pushing layer 23 and transmitting the pushing force to the sealing layer 21, so as to push the sealing layer 21 to move in parallel.

[0043] Further, in the above technical solution, the pushing layer 23 is fixedly connected with one end of the pushing assembly 30.

[0044] Further, in the above technical solution, the sealing layer 21 is composed of a silicon rubber ring with a trapezoidal section, the wide bottom edge of the trapezoidal section faces the body of the injection pushing piston 20, and the narrow top edge faces the inner wall of the injection tube 10, so as to increase the contact area of the sealing layer 21 and the inner wall of the injection tube 10 and reduce the frictional resistance.

[0045] Further, in the above technical solution, the side, away from the pushing assembly 30, of the injection tube 10 is provided with a threaded connector 11, and the injection port is a conical structure, and the side wall of the injection port is provided with threads for connecting the injection needle.

[0046] Further, in the above technical solution, the side wall of the threaded connector 11 is provided with a limiting plate, and the limiting plate is a disc-shaped structure, which is inclined to the side of the injection tube 10 and forms an included angle of 15-25° with the injection port.

[0047] Further, in the above technical solution, the wall thickness of the injection tube 10 is 1-2 mm, the length is 150-300 mm, and the outer diameter is 10-20 mm; the injection tube 10 is made of a medical-grade polycarbonate material and is used for observing the flow of the internal liquid.

[0048] The outer wall of the injection tube 10 is provided with scale lines, and the scale lines are uniformly distributed and used for indicating the volume of the fluid in the injection tube 10.

[0049] Specifically, the principle of the utility model is that: in use, the liquid container is opened, the liquid is injected into the injection tube, and it is ensured that there is no air bubble; the pushing plate of the injection device is held, the hand is stabilized, and the liquid flow is not unstable due to hand vibration. The pushing plate is pressed slowly and stably. The pushing force should be uniform, and the liquid should not be injected too fast, so as to avoid air bubbles or too fast injection. In the injection process, the flow of the liquid is observed, and it is ensured that the liquid flows stably and is not leaked. The limiting protrusion is used for reminding the pushing distance, when the pushing process is resisted, the pushing force is increased, the injection pushing piston is pressed over the limiting protrusion, the pushing is continued, and the specified pushing distance is reached.

Claims

1. A cardiovascular intervention bolus injector characterized by, The utility model provides an injection device, which comprises an injection tube (10), an injection pushing piston (20), a pushing assembly (30) and a pushing plate (40), the injection tube (10) is cylindrical, the injection pushing piston (20) is slidably connected in the inside of the injection tube (10), one side of the injection pushing piston (20) is provided with the pushing assembly (30), the pushing assembly (30) comprises two regular hexagonal prism rods, one end of the two regular hexagonal prism rods extends to the outside of the injection tube (10) and is fixedly connected with the pushing plate (40), the surface of the pushing plate (40) is provided with texture convenient for finger pressing, is used for receiving external force and driving the pushing assembly (30), the injection pushing piston (20) slides along the inner wall of the injection tube (10). The top wall and the bottom wall of the injection tube (10) are both provided with a plurality of limiting protrusions (12), the limiting protrusions (12) are semicircular in shape and are used for indicating the pushing position of the injection pushing piston (20), the limiting protrusions (12) are made of rubber and have a thickness less than 1 / 5 of the radius of the injection pushing piston (20). The injection pushing piston (20) comprises three layers, i.e., a sealing layer (21), an equalizing layer (22) and a pushing layer (23) from inside to outside, and the sealing layer (21), the equalizing layer (22) and the pushing layer (23) are integrally connected.

2. A cardiovascular intervention bolus injector according to claim 1, characterized in that, The two pushing assemblies (30) are arranged in parallel and are provided with a plurality of transverse connecting rods at the middle positions, the transverse connecting rods are uniformly distributed and are used for enhancing the stability and rigidity of the pushing assembly (30).

3. A cardiovascular intervention bolus injector according to claim 2, wherein, The equalizing layer (22) has an elastic coefficient between the sealing layer (21) and the pushing layer (23) and is used for uniformly dispersing and transmitting the pushing force received by the pushing layer (23) to the sealing layer (21) to push the sealing layer (21) to move in parallel.

4. A cardiovascular intervention bolus injector according to claim 3, wherein, The pushing layer (23) is fixedly connected with one end of the pushing assembly (30).

5. A cardiovascular intervention bolus injector according to claim 4, wherein, The sealing layer (21) is made of a silicon rubber ring with a trapezoidal cross section, the wide bottom edge of the trapezoidal cross section faces the main body of the injection pushing piston (20), the narrow top edge faces the inner wall of the injection tube (10), is used for increasing the contact area of the sealing layer (21) and the inner wall of the injection tube (10) and reducing the frictional resistance.

6. A cardiovascular intervention bolus injector according to claim 5, wherein, The side, away from the pushing assembly (30), of the injection tube (10) is provided with a threaded connector (11), the injection port is conical in structure, the side wall thereof is provided with threads and is used for connecting an injection needle.

7. A cardiovascular intervention bolus injector according to claim 6, wherein, The side wall of the threaded connector (11) is provided with a limiting plate, the limiting plate is disc-shaped, is inclined to one side of the injection tube (10) and forms an included angle of 15-25° with the injection port.

8. A cardiovascular intervention bolus injector according to claim 7, wherein, The tube wall of the injection tube (10) has a thickness of 1-2 mm, a length of 150-300 mm and an outer diameter of 10-20 mm, is made of medical-grade polycarbonate material and is used for observing the flow of internal liquid; The outer wall of the injection tube (10) is provided with scale lines, the scale lines are uniformly distributed and are used for indicating the volume of fluid in the inside of the injection tube (10).

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