A high pressure contrast injector system

Abstract

The application discloses a high-pressure contrast injection system and relates to the technical field of medical devices.The high-pressure contrast injection system comprises an operation table, a medicine bottle placing rack, an intermediate fixed table plate, three pressure injection cylinders, a three-way joint, a front end infusion tube, a mixed infusion tube, a four-way joint, a tail end infusion tube, an ultrasonic wave flow sensor, a pressure sensor, a filter core and an optional bubble sensor.The system adopts an electromagnetic magnetic attraction connection piston, a magnetic attraction frame+sliding clamping strip+screw rod to quickly fix the injection cylinder, closed loop flow control to accurately proportion three kinds of medicaments, real-time pressure monitoring and automatic adjustment, and automatic bubble shutdown, so that the liquid medicine suction, mixing and injection are fully automated.The system is safe and stable, and is convenient to install and disassemble through the one-way check valve, the reinforcing sleeve ring and the elastic rubber gasket through hole.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically a high-pressure contrast injection system. Background Technology

[0002] Existing high-pressure contrast injection systems mainly use manual or semi-automatic mechanical drive to fix single or a small number of pressure injection cylinders. The piston cap and drive device are mostly connected by threads or simple snaps. Drug aspiration depends on the operator manually pulling the piston to create negative pressure. Mixing multiple drugs (such as contrast agents and auxiliary solutions) relies on manual pre-preparation or timed quantitative delivery, without any real-time flow monitoring devices. The injection tubing is usually only equipped with a basic filter screen, lacking real-time pressure feedback and automatic detection. The fixing mechanism is mostly rigid bolts or spring clips, requiring multiple screws to be tightened one by one during installation, and disassembly is equally cumbersome and time-consuming. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides the following technical solution: a high-pressure contrast injection system, including an operating table with a bottle holder for mounting three bottles, and a central fixing plate for fixing three pressure injection cylinders, the three pressure injection cylinders being fixed to the central fixing plate for easy disassembly; a three-way connector connected to the Luer connector of the pressure injection cylinders, one end of the three-way connector being connected to the bottle via a front infusion tube, and the other end of the three-way connector being connected to a mixing infusion tube; a terminal infusion tube connected to the three mixing infusion tubes via a four-way connector, the three mixing infusion tubes and the terminal infusion tube forming a four-way channel; an ultrasonic flow sensor for measuring the flow rate of the liquid inside the mixing infusion tube, a pressure sensor connected in series in the middle of the terminal infusion tube, and a filter element, wherein the pressure sensor is used to monitor the injection pressure of the contrast agent injected into the human body, and the filter element is used to filter impurities in the agent. A bubble sensor can also be included to measure whether there are bubbles in the agent in the terminal infusion tube; if bubbles are present, all servo electric actuators are directly controlled to stop operating.

[0004] Preferably, a one-way check valve is provided at the connection points of the three-way connector with the front infusion tube and the mixing infusion tube; a bottle inserter is provided at the end of the front infusion tube that connects to the medicine bottle to draw out the medicine liquid inside the medicine bottle.

[0005] Preferably, the intermediate fixed platform has three rectangular sliding slots, each containing a stationary clamping block for easy disassembly. A movable clamping block is located to the side of each stationary clamping block. These static and movable clamping blocks are used to clamp and fix the pressure injection cylinder. The movable clamping block has a lead screw top hole into which a lead screw is rotatably inserted. The lead screw passes through the intermediate fixed platform via a threaded drive. The axis of the lead screw is parallel to the sliding direction of the movable clamping block within the rectangular sliding slot. A knob is fixed to the end of the lead screw away from the lead screw top hole. The movable clamping block is slidably positioned within the rectangular sliding slot.

[0006] Preferably, it also includes a base fixing plate fixed on the operating table. Three elastic rubber pads are fixed on the base fixing plate. Each elastic rubber pad is equipped with a servo electric push rod below it. The telescopic cylinder of the servo electric push rod is fixed to the base fixing plate. An electromagnet connecting block is fixed to the end of the telescopic rod of the servo electric push rod. The telescopic rod of the electromagnet connecting block slides through the base fixing plate and the elastic rubber pad.

[0007] Preferably, an active electromagnetic suction frame is provided on the outside of all elastic rubber pads. The active electromagnetic suction frame is fixed on the base fixing plate. A passive magnetic suction frame is magnetically contacted on the active electromagnetic suction frame. Three sets of sliding clamping strips are slidably installed on the inner side of the passive magnetic suction frame along the length direction. Each set of sliding clamping strips consists of two sliding clamping strips. Each set of sliding clamping strips is used to fix the hand support flange of the pressure injection cylinder.

[0008] Preferably, a piston cap is slidably and sealed on the inner wall of each pressure injection cylinder, and an armature disk is fixed inside the piston cap. The armature disk is magnetically attracted to the electromagnet connecting block.

[0009] Preferably, the elastic pad has a through hole at the mounting position on the base fixing plate. This through hole is used to connect the inside of the pressure injection cylinder with the external atmosphere to achieve a balance of internal and external air pressure.

[0010] Preferably, a bottle support plate is fixedly installed on the bottle rack. The bottle support plate is used to support and lift the mouth of all the pressure injection cylinders. The bottle body is tied to the bottle rack with straps to reduce the shaking of the bottle on the bottle rack.

[0011] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention uses an ultrasonic flow sensor to monitor the flow rate of the liquid inside the mixed infusion tube in real time, calculates the accurate flow data in combination with time, and implements closed-loop control of the extension and retraction of the three servo electric push rods, which can strictly ensure that the three drugs (contrast agent, diluted saline auxiliary drug) are uniformly mixed according to the ratio preset by the doctor (such as 1:2:0.5). Throughout the process, the one-way check valve of the three-way connector ensures the one-way flow of the drug solution; when the flow data deviates, the servo electric push rod immediately adjusts the speed and stroke, so that the mixing ratio error of the mixed drug solution finally gathered at the four-way connector approaches zero. The invention solves the problem of inaccurate ratio caused by relying on manual visual inspection or simple timed control in traditional systems. It not only improves the clarity of the contrast image, but also significantly reduces the risk of allergies or insufficient imaging caused by incorrect ratio; (2) The pressure sensor connected in series in the terminal infusion tube of the present invention can monitor the injection pressure of the contrast agent injected into the human body in real time. When the pressure exceeds the preset threshold, the system simultaneously slows down the extension speed of all servo electric push rods and telescopic rods, thereby effectively reducing the injection pressure and avoiding damage to the patient's blood vessels. When used in conjunction with the filter element, it further filters drug impurities to ensure the purity of the drug solution entering the human body; (3) The fixing mechanism of the present invention includes the magnetic attraction of the active electromagnetic suction frame and the passive magnetic suction frame, as well as the squeezing and fixing of the pressure injection cylinder hand support flange by the sliding clamping strip, and the adjustment of the screw knob of the static clamping block and the dynamic clamping block in the rectangular sliding groove to realize the rapid installation and disassembly of the pressure injection cylinder. During installation, it is only necessary to use a ring, sliding clamp, and start the electromagnet to fix it; during disassembly, it can be removed by shaking after power is turned off, and the whole process does not require complicated tools; (4) The electromagnet connecting block of the servo electric push rod of the present invention is quickly connected to the armature plate inside the piston cap by magnetic attraction, which further improves the convenience of installation and disassembly of the whole system. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 This is a diagram showing the distribution of all infusion tubes in this invention.

[0014] Figure 3 This diagram illustrates the relationship between the sliding clamping strip and the pressure injection cylinder in this invention.

[0015] Figure 4 For the present invention Figure 3 Enlarged diagram of point A in the middle.

[0016] Figure 5 This is a schematic diagram of the piston cap structure of the present invention.

[0017] In the diagram: 101-Medicine bottle; 102-Front-end infusion tubing; 103-T-connector; 104-Mixing infusion tubing; 105-Ultrasonic flow sensor; 106-Four-way connector; 107-Tail-end infusion tubing; 108-Pressure sensor; 109-Filter cartridge; 110-Pressure syringe; 111-Piston cap; 112-Armature plate; 113-Hand rest flange; 201-Operating table; 202-Intermediate fixed platform; 203-Medicine bottle placement. Frame; 204-Strap; 205-Medicine bottle tray; 206-Knob; 207-Rectangular sliding groove; 208-Lead screw; 209-Lead screw top hole; 210-Static clamping block; 211-Moving clamping block; 212-Passive magnetic suction frame; 213-Active electromagnetic suction frame; 214-Base fixing plate; 215-Elastic rubber pad; 216-Sliding clamping strip; 217-Reinforcing collar; 301-Servo electric push rod; 302-Electromagnetic connecting block. Detailed Implementation

[0018] The following is in conjunction with the appendix Figures 1-5 The technical solution of the present invention will be further illustrated through specific embodiments.

[0019] This invention provides a high-pressure contrast injection system, including an operating table 201, on which a vial holder 203 for mounting three vials 101 is provided. An intermediate fixing plate 202 for fixing three pressure injection cylinders 110 is also fixedly mounted on the operating table 201, with the three pressure injection cylinders 110 fixed to the intermediate fixing plate 202 for easy disassembly. The system includes a three-way connector 103 connected to the Luer connector of the pressure injection cylinders 110. One end of the three-way connector 103 is connected to the vial 101 via a front infusion tube 102, and the other end of the three-way connector 103 is connected to a mixing infusion tube 104. The system also includes a terminal infusion tube 107. 7 is connected to three mixing infusion tubes 104 via a four-way connector 106, forming a four-way channel with the three mixing infusion tubes 104 and the terminal infusion tube 107. The system includes an ultrasonic flow sensor 105 for measuring the flow rate inside the mixing infusion tube 104 (calculating the flow rate by combining flow rate and time, using this data to perform closed-loop control of the extension and retraction of the servo electric actuator 301, controlling the flow rate of the medication ejected from the pressure syringe 110), a pressure sensor 108 connected in series in the middle of the terminal infusion tube 107, and a filter element 109. The pressure sensor 108 monitors the injection pressure of the contrast agent injected into the body, and the filter element 109 filters impurities in the medication. A bubble sensor can also be included to measure the presence of bubbles in the medication in the terminal infusion tube 107; if bubbles are present, all servo electric actuators 301 are directly stopped.

[0020] One-way check valves are installed at the connection points of the three-way connector 103 with the front infusion tube 102 and the mixing infusion tube 104; a bottle inserter is installed at the end of the front infusion tube 102 that connects to the medicine bottle 101 to draw out the liquid medicine inside the medicine bottle 101. Three rectangular sliding slots 207 are provided on the intermediate fixed platform 202, and a static clamping block 210 is fixed in each rectangular sliding slot 207 in a way that is easy to disassemble; a movable clamping block 211 is provided on the side of each static clamping block 210, and the static clamping block 210 and the movable clamping block 211 are used to clamp and fix the pressure injection cylinder 110. The movable clamping block 211 has a lead screw top hole 209, and a lead screw 208 is rotatably inserted into the lead screw top hole 209. The lead screw 208 is set through the intermediate fixed platform 202 by threaded transmission. The axis of the lead screw 208 is parallel to the sliding direction of the movable clamping block 211 in the rectangular sliding groove 207. A knob 206 is fixed at the end of the lead screw 208 away from the lead screw top hole 209. The movable clamping block 211 is slidably set in the rectangular sliding groove 207.

[0021] It also includes a base fixing plate 214 fixed on the operating table 201. Three elastic rubber pads 215 are fixed on the base fixing plate 214. Each elastic rubber pad 215 is equipped with a servo electric push rod 301 below it. The telescopic cylinder of the servo electric push rod 301 is fixed to the base fixing plate 214. An electromagnet connecting block 302 is fixed to the end of the telescopic rod of the servo electric push rod 301. The telescopic rod of the electromagnet connecting block 302 slides through the base fixing plate 214 and the elastic rubber pads 215. An active electromagnetic suction frame 213 is provided on the outside of all elastic rubber pads 215. The active electromagnetic suction frame 213 is fixed on the base fixing plate 214. A passive magnetic suction frame 212 is magnetically contacted on the active electromagnetic suction frame 213. Three sets of sliding clamping strips 216 are slidably installed on the inner side of the passive magnetic suction frame 212 along its length. Each set of sliding clamping strips 216 consists of two sliding clamping strips 216. Each set of sliding clamping strips 216 is used to fix the hand support flange 113 of the pressure injection cylinder 110. It also includes a reinforcing collar 217 that matches the outer diameter of the pressure injection cylinder 110. Before installing the pressure injection cylinder 110, the reinforcing collar 217 is first placed on the pressure injection cylinder 110. Then, the reinforcing collar 217 is slid to the position where it contacts the hand support flange 113. The pressure injection cylinder 110 is then passed through the rectangular sliding groove 207. At this time, the hand support flange 113 passes between the two sliding clamping strips 216. Then, the hand support flange 113 contacts the elastic rubber pad 215. At this time, the two sliding clamping strips 216 are manually pushed closer to the pressure injection cylinder 110 so that the sliding clamping strips 216 contact the pressure injection cylinder 110 and the reinforcing collar 217. The above process is repeated for all three pressure injection cylinders 110. Finally, the active electromagnetic suction frame 213 (which has multiple electromagnets embedded inside) is activated. The active electromagnetic suction frame 213 generates magnetic force to attract the passive magnetic suction frame 212, so that the passive magnetic suction frame 212 and the active electromagnetic suction frame 213 are magnetically fixed together. During this process, the elastic pad 215 is compressed and deformed. The hand support flange 113 on each pressure injection cylinder 110 is pressed onto the elastic pad 215 by the two sliding clamping strips 216 through the compression reinforcing collar 217, thereby fixing the hand support flange 113 end of the pressure injection cylinder 110. Finally, the corresponding knob 206 is rotated. The rotation of the knob 206 drives the lead screw 208 to rotate. The rotation of the lead screw 208 will move axially on the intermediate fixed platform 202. Then the lead screw 208 drives the moving clamping block 211 to approach the pressure injection cylinder 110, thereby fixing the pressure injection cylinder 110 on the stationary clamping block 210. During disassembly, simply rotate knob 206 to separate the stationary clamping block 210 and the moving clamping block 211, and then de-energize the active electromagnetic suction frame 213. Since all the sliding clamping bars 216 are slidably mounted on the passive magnetic suction frame 212 without any locking parts, you can directly remove the pressure injection cylinder 110 by slightly shaking it.

[0022] Each pressure syringe 110 has a piston cap 111 slidably and sealed on its inner wall. An armature plate 112 is fixed inside the piston cap 111, and the armature plate 112 magnetically engages with the electromagnet connecting block 302. An elastic rubber pad 215 has a through hole at its mounting position on the base mounting plate 214. This through hole connects the inside of the pressure syringe 110 to the external atmosphere, achieving pressure balance. A bottle holder 205 is fixedly installed on the bottle rack 203. The bottle holder 205 supports and lifts the mouths of all the pressure syringes 110. The bottle body of the bottle 101 is secured to the bottle rack 203 with straps 204 to reduce shaking of the bottle 101 on the bottle rack 203.

[0023] The three vials 101 contain contrast agents (such as iodine contrast agents) and diluted saline auxiliary agents (such as anticoagulants or enhancers). First, the servo electric actuator 301 is activated. The telescopic rod of the servo electric actuator 301 drives the electromagnet connecting block 302 to contact the armature plate 112. Activating the electromagnet connecting block 302 generates magnetic force, fixing it to the armature plate 112, thus fixing the telescopic rod of the servo electric actuator 301 to the piston cap 111. Controlling the telescopic rod of the servo electric actuator 301 to retract causes the piston cap 111 inside the pressure injection cylinder 110 to move downwards from the Luer connector end. During this process, the pressure injection cylinder 110 is under negative pressure, drawing the medication from vial 101 through the infusion tube 102. At this time, the one-way valve at the connection between the three-way connector 103 and the mixing infusion tube 104 is closed. The three pressure syringes 110 respectively draw in the liquid medicine from the corresponding medicine bottle 101. After all the medication is inhaled, the three medications are prepared for injection according to the doctor's manually preset ratio (e.g., 1:2:0.5). The injection action is controlled by the extension of the servo electric push rod 301. The extension rod of the servo electric push rod 301 pushes the piston cap 111 to slide inside the pressure injection cylinder 110. The piston cap 111 pushes the medication inside the pressure injection cylinder 110 to flow out through the Luer connector into the mixing infusion tube 104. During this process, the one-way valve at the connection between the three-way connector 103 and the front infusion tube 102 is in a closed state. According to different ratios, the extension and retraction of the three servo electric push rods 301 are controlled. Finally, the medication in the different pressure injection cylinders 110 will be collected in the four-way connector 106 through the three mixing infusion tubes 104, and then the final ratio of contrast agent is achieved. The ultrasonic flow sensor 105 is used to monitor the flow rate of the medication in the mixing infusion tube 104, thereby monitoring the ratio of the mixed contrast agent, and thus controlling the extension and retraction of the servo electric push rod 301 in reverse. This ensures the final mixing ratio of the contrast agent solution within the four-way connector 106. The mixed contrast agent solution is then delivered to the human body through the terminal infusion tube 107. During this process, the pressure sensor 108 monitors the injection pressure of the contrast agent solution injected into the body in real time. When the pressure exceeds the threshold, the extension speed of all servo electric push rods 301 is simultaneously slowed down to reduce the injection pressure.

Claims

1. A high-pressure contrast-enhancing injector system, characterized in that, The system includes an operating table (201), on which a medicine bottle rack (203) for mounting three medicine bottles (101) is provided. An intermediate fixing plate (202) for fixing three pressure injection cylinders (110) is also fixedly installed on the operating table (201). The three pressure injection cylinders (110) are fixed on the intermediate fixing plate (202) in a way that facilitates disassembly. Includes a three-way connector (103) connected to the Luer connector of the pressure syringe (110), one end of the three-way connector (103) is connected to the medicine bottle (101) through the front infusion tube (102), and the other end of the three-way connector (103) is connected to the mixing infusion tube (104). Includes a terminal infusion tube (107), which is connected to three mixing infusion tubes (104) via a four-way connector (106). The three mixing infusion tubes (104) and the terminal infusion tube (107) form a four-way channel. It includes an ultrasonic flow sensor (105) for measuring the flow rate of liquid inside the mixed infusion tube (104), a pressure sensor (108) connected in series in the middle of the terminal infusion tube (107), and a filter element (109), wherein the pressure sensor (108) is used to monitor the injection pressure of the contrast agent injected into the human body, and the filter element (109) is used to filter impurities in the agent.

2. The high-pressure contrast injection system according to claim 1, characterized in that: One-way check valves are provided at the connection points of the three-way connector (103) with the front infusion tube (102) and the mixing infusion tube (104); a bottle inserter is provided at the end of the front infusion tube (102) connected to the medicine bottle (101) to draw out the medicine liquid inside the medicine bottle (101).

3. The high-pressure contrast injection system according to claim 2, characterized in that: Three rectangular sliding slots (207) are provided on the intermediate fixed platform (202). Each rectangular sliding slot (207) has a stationary clamping block (210) fixed in a way that is easy to disassemble. Each stationary clamping block (210) has a movable clamping block (211) on its side. The stationary clamping block (210) and the movable clamping block (211) are used to clamp and fix the pressure injection cylinder (110).

4. The high-pressure contrast injection system according to claim 3, characterized in that: It also includes a base fixing plate (214) fixed on the operating table (201). Three elastic rubber pads (215) are fixed on the base fixing plate (214). Each elastic rubber pad (215) is equipped with a servo electric push rod (301) below it. The telescopic cylinder of the servo electric push rod (301) is fixed to the base fixing plate (214). An electromagnet connecting block (302) is fixed to the end of the telescopic rod of the servo electric push rod (301). The telescopic rod of the electromagnet connecting block (302) slides through the base fixing plate (214) and the elastic rubber pad (215).

5. A high-pressure contrast injection system according to claim 4, characterized in that: An active electromagnetic suction frame (213) is provided on the outside of all elastic rubber pads (215). The active electromagnetic suction frame (213) is fixed on the base fixing plate (214). A passive magnetic suction frame (212) is magnetically contacted on the active electromagnetic suction frame (213). Three sets of sliding clamping strips (216) are slidably installed on the inner side of the passive magnetic suction frame (212) along the length direction. Each set of sliding clamping strips (216) consists of two sliding clamping strips (216). Each set of sliding clamping strips (216) is used to fix the hand support flange (113) of the pressure injection cylinder (110).

6. A high-pressure contrast injection system according to claim 5, characterized in that: Each pressure injection cylinder (110) has a piston cap (111) that is slidably and sealed on its inner wall. An armature disk (112) is fixed inside the piston cap (111), and the armature disk (112) is magnetically attracted to the electromagnet connecting block (302).

7. A high-pressure contrast injection system according to claim 6, characterized in that: The elastic pad (215) has a through hole at the mounting position on the base fixing plate (214). The through hole is used to connect the inside of the pressure injection cylinder (110) with the outside atmosphere to achieve the balance of internal and external air pressure.

8. A high-pressure contrast injection system according to claim 7, characterized in that: A bottle holder (205) is fixedly installed on the bottle holder (203). The bottle holder (205) is used to support the bottle mouths of all the pressure injection cylinders (110). The bottle body of the bottle (101) is tied to the bottle holder (203) by a strap (204) to reduce the shaking of the bottle (101) on the bottle holder (203).

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