Contrast injector and injection device

Abstract

The utility model discloses a kind of contrast injection syringe and injection device, it is related to contrast injection technology field, including injection tube, the outside fixed connection of sealing element has push rod, the end fixed connection of push rod has push plate, the outside fixed connection of injection tube's liquid outlet has three-way pipe, fixed connection has connecting strip between two groups of injection tube, the inside of connecting strip is opened and limited to limit groove, the inside limit sliding connection of limit groove has slider, slide groove is opened in the two sides of limit groove, the two sides of slider and two groups of push plate are evenly fixed connection with connecting block, connecting strip and limit groove between installation have push-pull mechanism. The device is loaded with different medicaments by double pipe independently, and is pushed by screw rod synchronously by single motor drive wire, realizes two kinds of contrast agent accurate equal injection, and three-way valve branch control ensures that medicine and injection do not interfere each other, significantly improve the precision and operating efficiency of double tracer synchronous injection, and also can realize self exhaust function, use more convenient.

Description

Technical Field

[0001] This utility model relates to the field of contrast injection technology, and more specifically, to a contrast injector and injection device. Background Technology

[0002] Currently, in medical imaging examinations, it is often necessary to simultaneously inject two contrast agents with different properties to enhance the imaging effect of different tissue structures. For example, in liver MRI, disodium gadoxetate and superparamagnetic iron oxide are used in combination. However, traditional injection devices are mostly single-tube designs, which cannot achieve simultaneous and precise injection of two agents, resulting in inaccurate injection timing and dosage control, affecting image quality. In addition, existing equipment lacks real-time dose monitoring capabilities, is cumbersome to operate, and is prone to agent waste or contamination, making it difficult to meet the clinical demand for high-precision dual tracer injection.

[0003] In the prior art, dual-tube injection devices mostly adopt independent drive structures, which are not only bulky, but also difficult to ensure the synchronization and dosage consistency of the two drugs, affecting the accuracy of diagnosis. At the same time, the traditional syringe does not effectively isolate the drug drawing and injection tubing, which can easily cause cross-contamination or inconvenience in operation. Therefore, in order to address the above technical problems, a contrast injection syringe and injection device are proposed here. Utility Model Content

[0004] The purpose of this invention is to provide a contrast injector and injection device that independently carries different drugs in two tubes and synchronously pushes two sets of push rods with a single motor-driven lead screw to achieve precise and equal injection of two contrast agents. The device features a tube wall scale observation window for real-time dose monitoring and a three-way valve for branch control to ensure that drug aspiration and injection do not interfere with each other, significantly improving the accuracy and operational efficiency of simultaneous injection of dual tracers. It also has a self-venting function, making it more convenient to use.

[0005] This utility model is achieved through the following technical solution:

[0006] An angiography injector includes two sets of symmetrically installed injection tubes. A sealing element is slidably connected to the inner side of each injection tube. A push rod is fixedly connected to the outer side of the sealing element. A push plate is installed on the outer side of the push rod. A three-way tube is fixedly connected to the outer side of the outlet of each injection tube. A connecting strip is fixedly connected between the two sets of injection tubes. A limiting groove is formed inside the connecting strip. A slider is slidably connected to the inner side of the limiting groove. Sliding grooves are formed on both sides of the limiting groove. Connecting blocks are fixedly connected to both sides of the slider and the two sets of push plates. A push-pull mechanism is installed between the connecting strip and the limiting groove.

[0007] Preferably, the push rod has a threaded groove on its outside, the push plate is rotatably connected to the threaded groove, and a rotating sleeve is rotatably connected to one side of the push plate, and the rotating sleeve is engaged with the threaded groove.

[0008] Preferably, a sealing plate is fixedly connected to the open end of the injection tube, and the push rod is slidably connected to the sealing plate. Valves are fixedly installed on the outside of the other two pipes of the three-way tube.

[0009] Preferably, fixing rings are fixedly connected to both sides of the connecting strip, and the fixing rings are fixedly connected to the outside of the injection tube.

[0010] Preferably, the push-pull mechanism includes a micro motor and a lead screw. The micro motor is fixedly connected to the outside of the connecting strip, and the lead screw is rotatably connected to the inside of the limiting groove. The lead screw and the micro motor are fixedly connected.

[0011] Preferably, the slider is threaded to the outside of the lead screw, and the connecting block is slidably connected to the inside of the groove.

[0012] Preferably, the injection tube has an observation window on its outside, and a scale is fixedly connected to the outside of the injection tube, with the scale installed on the side close to the observation window.

[0013] An injection device, comprising a contrast injector.

[0014] The technical solution of this utility model has at least the following beneficial effects:

[0015] This invention proposes a contrast agent injector that uses two injection tubes to independently load different agents, combined with a lead screw synchronous drive structure, to ensure precise and synchronous injection of the two contrast agents. This avoids imaging deviations caused by asynchronous operation of traditional dual syringes. A micro motor controls the injection speed and dosage, improving the controllability and repeatability of the injection process. It is particularly suitable for dual tracer examinations requiring strict timing. The observation window and scale design facilitate real-time monitoring of the drug dosage, reducing human reading errors. The three-way valve design completely isolates the drug aspiration and injection processes, eliminating the risk of cross-contamination and simplifying the operation steps. The overall structure is compact, achieving integrated and precise control while ensuring the independence of the two drug streams. This significantly improves the efficiency and imaging quality of complex contrast examinations and also features a self-venting function, making it more convenient to use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial side sectional view of the present invention;

[0018] Figure 3 for Figure 1 Enlarged view of A in the middle;

[0019] Figure 4 for Figure 1 Enlarged view of B in the middle;

[0020] Figure 5 This is a schematic diagram of the second overall structure of the present invention;

[0021] Figure 6 for Figure 5 Enlarged view of C in the middle;

[0022] Reference numerals: 1. Injection tube; 2. Seal; 3. Push rod; 4. Push plate; 5. Sealing plate; 6. T-connector; 7. Valve; 8. Connecting strip; 9. Retaining ring; 10. Limiting groove; 11. Slide groove; 12. Micro motor; 13. Lead screw; 14. Slider; 15. Connecting block; 16. Observation window; 17. Scale; 18. Threaded groove; 19. Rotating sleeve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-6 This utility model proposes a contrast injection syringe, comprising two sets of symmetrically installed injection tubes 1. The injection tube 1 serves as a storage container for the contrast agent, and a sealing element 2 is slidably connected to its inner side. The sealing element 2 is used to prevent leakage of the contrast agent and ensure sealing during injection. A push rod 3 is fixedly connected to the outside of the sealing element 2. The push rod 3 serves as a power transmission component, and a push plate 4 is installed on its outside. A threaded groove 18 is opened on the outside of the push rod 3. The push plate 4 and the threaded groove 18 are rotatably connected. A rotating sleeve 19 is rotatably connected to one side of the push plate 4, and the rotating sleeve 19 is engaged with the threaded groove 18. The push plate 4 is used to uniformly transmit the thrust to the sealing element 2. A sealing plate 5 is fixedly connected to the open end of the injection tube 1, and the push rod 3 and the sealing plate 5 are slidably connected. The sealing plate 5 serves to fix the movement trajectory of the push rod 3 and provide secondary sealing.

[0025] A three-way tube 6 is fixedly connected to the external outlet of the injection tube 1. The three-way tube 6 serves as the contrast agent output channel. Valves 7 are fixedly installed on the external sides of the other two tubes. Valves 7 are used to control the flow direction and opening and closing of the contrast agent. A connecting strip 8 is fixedly connected between the two sets of injection tubes 1. The connecting strip 8 serves as the supporting frame of the overall structure. Fixing rings 9 are fixedly connected to both sides of the connecting strip 8. The fixing rings 9 are fixedly connected to the external side of the injection tube 1. The fixing rings 9 are used to connect the injection tube 1 and the connecting strip 8.

[0026] A limiting groove 10 is formed inside the connecting strip 8, which serves as a motion guide rail. A slider 14 is slidably connected to the inner side of the limiting groove 10, acting as a power conversion component. Slide grooves 11 are formed on both sides of the limiting groove 10. Connecting blocks 15 are fixedly connected to both sides of the slider 14 and the two sets of push plates 4. The connecting blocks 15 are used to synchronously transmit the linear motion of the slider 14 to the push plates 4 on both sides. A push-pull mechanism is installed between the connecting strip 8 and the limiting groove 10. The push-pull mechanism includes a micro motor 12 and a lead screw 13. The micro motor 12 is fixedly connected to the outside of the connecting strip 8 as a power source, and the lead screw 13 is rotatably connected to the inside of the limiting groove 10 as a transmission component. The lead screw 13 and the micro motor 12 are fixedly connected. The slider 14 is threaded to the outside of the lead screw 13 to convert the rotational motion into linear motion. The connecting blocks 15 are slidably connected to the inside of the slide grooves 11 to ensure smooth movement.

[0027] An observation window 16 is provided on the outside of the injection tube 1. The observation window 16 is used to observe the remaining amount of contrast agent in real time. A scale 17 is fixedly connected to the outside of the injection tube 1 and is installed on the side close to the observation window 16. The scale 17 is used to accurately measure the amount of contrast agent used.

[0028] This application also proposes an injection device including the above-described contrast injector, which has all the functional characteristics of a contrast injector.

[0029] The working principle of a contrast injector based on an embodiment is as follows: When two contrast agents with different properties need to be used simultaneously, such as simultaneously injecting gadoxetine disodium to visualize the hepatobiliary phase and superparamagnetic iron oxide to visualize Kupffer cells in liver MRI, the two agents can be injected independently into two sets of symmetrically installed injection tubes 1. During injection, the micro motor 12 is activated to drive the lead screw 13 to rotate. Since the slider 14 is threaded to the outside of the lead screw 13, the rotation of the lead screw 13 can be precisely converted into the linear movement of the slider 14 along the limiting groove 10. The movement of the slider 14 synchronously drives the push plates 4 on both sides to push into the injection tube 1 through the connecting block 15, which in turn drives the push rod 3 to push the sealing member 2 fixed at its end to slide inside the injection tube 1, thereby simultaneously and equally ejecting the two agents from the end of the injection tube 1. The output is via a three-way tube 6 fixed at the outlet. The operation of the micro motor 12 ensures stable thrust and precise control of injection speed and dosage. The operator can observe the remaining amount of the two drugs in real time through the observation window 16 and scale 17 on the outside of the injection tube 1, which facilitates monitoring the input process. In addition, the valve 7 installed on the three-way tube 6 makes it easy to draw out different drugs and connect the injection tubing before injection, so that the drug drawing and injection processes do not interfere with each other. The operation is convenient and efficient, which significantly improves the accuracy and convenience of simultaneous injection of dual tracers and helps to improve diagnostic effects such as tumor detection rate. Furthermore, when gas enters the injection tube 1 due to drug drawing, the rotating sleeve 19 can be rotated independently. Through engagement with the threaded groove 18, it drives the push rod 3 to push, realizing the venting function and making the injection effect more precise.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A contrast injection syringe characterized by: The device includes two sets of symmetrically installed injection tubes (1). A sealing element (2) is slidably connected to the inner side of each injection tube (1). A push rod (3) is fixedly connected to the outer side of the sealing element (2). A push plate (4) is installed on the outer side of the push rod (3). A three-way pipe (6) is fixedly connected to the outer side of the outlet of each injection tube (1). A connecting strip (8) is fixedly connected between the two sets of injection tubes (1). A limiting groove (10) is opened inside the connecting strip (8). A slider (14) is slidably connected to the inner side of the limiting groove (10). Sliding grooves (11) are opened on both sides of the limiting groove (10). A connecting block (15) is fixedly connected between both sides of the slider (14) and the two sets of push plates (4). A push-pull mechanism is installed between the connecting strip (8) and the limiting groove (10).

2. A contrast injection syringe as defined in claim 1, wherein: The push rod (3) has a threaded groove (18) on its outside. The push plate (4) is rotatably connected to the threaded groove (18). A rotating sleeve (19) is rotatably connected to one side of the push plate (4), and the rotating sleeve (19) meshes with the threaded groove (18).

3. The contrast media injector of claim 1, wherein: The opening end of the injection tube (1) is fixedly connected to a sealing plate (5), and the push rod (3) is slidably connected to the sealing plate (5). The other two pipes of the three-way pipe (6) are fixedly installed with valves (7).

4. The contrast media injector of claim 1, wherein: The connecting strip (8) is fixedly connected to both sides by fixing rings (9), and the fixing rings (9) are fixedly connected to the outside of the injection tube (1).

5. The contrast media injector of claim 1, wherein: The push-pull mechanism includes a micro motor (12) and a lead screw (13). The micro motor (12) is fixedly connected to the outside of the connecting strip (8), and the lead screw (13) is rotatably connected to the inside of the limiting groove (10). The lead screw (13) and the micro motor (12) are fixedly connected.

6. A contrast media injector as defined in claim 5, wherein: The slider (14) is threaded to the outside of the lead screw (13), and the connecting block (15) is slidably connected to the inside of the groove (11).

7. The power injector of claim 1, wherein: An observation window (16) is provided on the outside of the injection tube (1), and a scale (17) is fixedly connected to the outside of the injection tube (1), with the scale (17) installed on the side close to the observation window (16).

8. An injection device, characterized in that The contrast injector includes any one of claims 1-7.

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