CN-120754357-B - Injection tube assembly, high-pressure injection device, high-pressure injection system and control method thereof

CN120754357BCN 120754357 BCN120754357 BCN 120754357BCN-120754357-B

Abstract

The application relates to a syringe assembly, a high-pressure injection device, a high-pressure injection system and a control method thereof, wherein an injector of the syringe assembly is arranged on an injection installation position of the high-pressure injection device, the liquid filling pipe group is arranged on the liquid filling installation position, the liquid discharging pipe group is arranged on the liquid discharging installation position, and the exhaust bag is arranged in the installation groove. The boosting driving mechanism is started to drive the piston to move backwards in the injection cylinder, and the liquid medicine is sucked into the injection cylinder through the first pipeline of the liquid injection pipe group. The boosting driving mechanism drives the piston to move forwards in the injection cylinder, so that the liquid medicine in the injection cylinder is pushed into the exhaust bag through the second pipeline. After the liquid medicine enters the air exhaust bag, the liquid medicine is sunk due to gravity and boosting pressure and is discharged through the liquid discharge pipe, and the air bubbles float to the space above the liquid medicine, so that even in the injection process of the liquid medicine, the air bubbles can be prevented from being pushed into a human body in the air exhaust bag, the continuity of the injection process is ensured, the requirements on structural air tightness and stability are reduced, and the reliability in the use process is ensured.

Inventors

YANG SHOUWANG
HUANG QINGJIN

Assignees

深圳伦珂医疗科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250714

Claims (9)

1. A syringe assembly for use in a high pressure injection device, the syringe assembly comprising: The syringe comprises a syringe barrel and a piston, wherein the piston is movably arranged in the syringe barrel, and a circulation port is formed on one side of the syringe barrel; A liquid injection tube set comprising a first pipeline connected to the circulation port of the injection tube, and The liquid discharge pipe group comprises a second pipeline, a liquid discharge bag, a liquid discharge pipe and a magnetic ball, wherein one end of the second pipeline is connected to a circulation port of the injection cylinder, the other end of the second pipeline is connected with the liquid discharge bag, the liquid discharge pipe is connected to the bottom wall of the liquid discharge bag, a containing cavity is formed in the liquid discharge bag, the magnetic ball is arranged in the containing cavity, the size of the magnetic ball is larger than the inner diameter of the liquid discharge pipe, the liquid discharge bag is arranged in a mounting groove of the high-pressure injection device and is opposite to an electromagnetic driving mechanism, and the electromagnetic driving mechanism is controlled to control the magnetic ball to move in the containing cavity; the liquid level detector is arranged in the mounting groove, when the injection is finished or the liquid level abnormally descends, the electromagnetic driving mechanism is automatically closed when the liquid level descends to the first liquid level sensor, the magnetic ball falls back to block the liquid discharge pipe, and the liquid medicine is prevented from being infused continuously or flowing back to the air discharge bag.
2. The syringe assembly of claim 1, wherein the number of said syringes is at least two, each of said syringes is disposed in parallel and spaced apart relation, the number of said sets of fluid lines is in accordance with the number of said syringes, each of said sets of fluid lines is associated with one of said syringes, said sets of fluid lines further comprise a collection line, the number of said second lines is in accordance with the number of said syringes, one end of each of said second lines is associated with a fluid port of one of said syringes, the other end of each of said second lines is associated with said collection line, and said collection line is connected to said air bag.
3. The syringe assembly according to claim 1 or 2, wherein the liquid injection tube set further comprises a drip chamber and a first control valve, the first pipeline is connected to the circulation port of the syringe through the first control valve, the first control valve is used for controlling unidirectional circulation of liquid from the first pipeline to the direction of the syringe, and one end of the first pipeline away from the syringe is connected to the bottom wall of the drip chamber.
4. The syringe assembly of claim 1 or 2, further comprising a pressure transfer member disposed on the drain tube for transferring the liquid pressure in the drain tube to a pressure detector, and/or The syringe assembly further includes a particle filter disposed on the drain.
5. A high pressure injection device, the high pressure injection device comprising: The device comprises a machine body, wherein an injection installation position, a liquid injection installation position and a liquid discharge installation position are formed on the machine body, the injection installation position is used for installing an injector, the liquid injection installation position is located above the injection installation position, the liquid injection installation position is used for installing a liquid injection pipe set, an installation groove is formed in the liquid discharge installation position, the liquid discharge installation position is used for installing a liquid discharge pipe set, the liquid discharge pipe set comprises a second pipeline, a liquid discharge bag, a liquid discharge pipe and a magnetic ball, one end of the second pipeline is connected to a circulation port of an injection cylinder of the injector, the other end of the second pipeline is connected with the air discharge bag, the liquid discharge pipe is connected to the bottom wall of the liquid discharge bag, the air discharge bag is installed in the installation groove, a containing cavity is formed in the liquid discharge bag, the magnetic ball is arranged in the containing cavity, and the size of the magnetic ball is larger than the inner diameter of the liquid discharge pipe; The electromagnetic driving mechanism is arranged on the machine body, is positioned at the mounting groove and is opposite to the exhaust bag, and is controlled to control the magnetic ball in the exhaust bag to move in the accommodating cavity so as to stir the liquid medicine in the exhaust bag and uniformly mix the liquid medicine; a boosting driving mechanism which is arranged at the injection installation position of the machine body and is used for driving a piston of the injector to move in the injection cylinder, and The liquid level detector is arranged in the mounting groove and is used for detecting the liquid level of liquid in the exhaust bag and is electrically connected with the electromagnetic driving mechanism, when the injection is finished or the liquid level abnormally descends, the electromagnetic driving mechanism is automatically closed when the liquid level descends to the first liquid level sensor, the magnetic ball falls back to block the liquid discharge pipe, and the liquid medicine is prevented from being continuously infused or reflowed to the exhaust bag.
6. The high pressure injection device of claim 5, wherein the electromagnetic drive mechanism comprises at least two electromagnetic valves, the two electromagnetic valves being disposed on the body at intervals about the mounting slot and being capable of alternate activation operation, or The electromagnetic driving mechanism comprises three coils, three iron cores, an electric control and an installation shell, wherein the three coils are correspondingly wound on the three iron cores respectively, the three iron cores are arranged in the installation shell at intervals around the installation groove, the three coils are connected to the electric control, and the electric control is controlled to be used for switching on three-phase alternating current.
7. The high pressure injection device of claim 6, further comprising a first bubble detector disposed on the liquid injection mounting location for detecting bubbles in the liquid injection tube set, and a second bubble detector disposed on the liquid discharge mounting location and behind the mounting slot for detecting bubbles in the liquid discharge tube.
8. The high pressure injection device of claim 7, further comprising a shut-off valve disposed on the drain mounting location rearward of the second bubble detector, the shut-off valve for controlling the drain to flow or shut off; The high-pressure injection device further comprises a pressure detector, wherein the pressure detector is arranged on the liquid discharge installation position and is positioned behind the installation groove, the pressure detector is used for detecting the liquid pressure in the liquid discharge pipe, the top wall of the air discharge bag is provided with an air outlet, the air outlet is provided with an air discharge pipe, the position, corresponding to the air discharge pipe, of the machine body is provided with an air discharge valve, the air discharge valve is electrically connected with the pressure detector, and the air discharge valve is used for controlling the opening or closing of the air discharge port according to sensing data of the pressure detector.
9. A high pressure injection system comprising a syringe assembly according to any one of claims 1-4 and a high pressure injection device according to any one of claims 5-8.

Description

Injection tube assembly, high-pressure injection device, high-pressure injection system and control method thereof Technical Field The application relates to the technical field of syringes, in particular to a syringe assembly, a high-pressure injection device, a high-pressure injection system and a control method thereof. Background In the fields of medical diagnosis and surgical treatment, such as interventional therapy, tumor therapy, nuclear medicine isotope injection and other scenes, imaging technologies such as CT scanning, angiography, magnetic resonance scanning and the like have become an indispensable diagnosis and treatment means. To achieve accurate visualization of the lesion, a high pressure syringe is often required to deliver contrast fluid into the patient to obtain an enhanced image of the specific site. However, air or gas bubbles are extremely likely to adhere to the inner surface of the tube or syringe during the process of sucking the medical fluid into the high-pressure syringe. For example, air injection into veins or arteries during angiography may cause air embolism, and even air amounts not to the extent that air embolism is initiated may cause imaging artifacts, reducing imaging diagnostic efficacy. Currently, there are related patent techniques to address this problem. As disclosed in patent CN117379633a, a high pressure injection system, a dressing change method and a bubble removal method are disclosed, in which a piston rod is controlled to move backward to form a negative pressure, and then a liquid outlet is opened and the piston rod is controlled to move forward to push out gas. If gas is found in the injection process of the liquid medicine, the injection can only be stopped, and the method can not realize the real-time discharge of bubbles in the injection process. Patent CN112261959a describes a method of removing gas from a reservoir, which proposes creating a vacuum expelling gas bubbles by driving a piston to move within a fluid reservoir, and providing a vibrator assisted venting on the fluid reservoir. However, this approach places high demands on the tightness and stability of the system structure. As can be seen, the conventional bubble removal technique still has shortcomings, and a more reliable bubble removal technique suitable for injection process is needed. Disclosure of Invention In view of the above, it is desirable to provide a syringe assembly, a high-pressure injection device, a high-pressure injection system, and a control method thereof that are more reliable and facilitate the discharge of air bubbles. The injection tube assembly comprises an injector, a liquid injection tube set and a liquid discharge tube set, wherein the injector comprises an injection tube and a piston, the piston is movably arranged in the injection tube, a circulation port is formed in one side of the injection tube, the liquid injection tube set comprises a first pipeline, the first pipeline is connected to the circulation port of the injection tube, the liquid discharge tube set comprises a second pipeline, a gas discharge bag and a liquid discharge tube, one end of the second pipeline is connected to the circulation port of the injection tube, the other end of the second pipeline is connected with the gas discharge bag, and the liquid discharge tube is connected to the bottom wall of the gas discharge bag. In one embodiment, the drain pipe group further comprises a magnetic ball, a containing cavity is formed in the drain bag, the magnetic ball is arranged in the containing cavity, the size of the magnetic ball is larger than the inner diameter of the drain pipe, the drain bag is arranged in a mounting groove of the high-pressure injection device and is opposite to the electromagnetic driving mechanism, and the electromagnetic driving mechanism is controlled to control the magnetic ball to move in the containing cavity. In one embodiment, the number of the syringes is at least two, the syringes are arranged in parallel at intervals, the number of the liquid injection pipe groups is consistent with that of the syringes, each liquid injection pipe group is correspondingly connected with one syringe, the liquid discharge pipe group further comprises a collecting pipeline, the number of the second pipelines is consistent with that of the syringes, one end of each second pipeline is correspondingly connected to a circulation port of one syringe, the other end of each second pipeline is respectively connected to the collecting pipeline, and the collecting pipeline is connected to the air discharge bag. In one embodiment, the liquid injection tube set further comprises a dropping funnel and a first control valve, the first pipeline is connected to the circulation port of the injection tube through the first control valve, the first control valve is used for controlling unidirectional circulation of liquid from the first pipeline to the direction of the injection tube, and one end