Automatic medicine suction and exhaust device of CT high-pressure injection system

Abstract

The utility model belongs to the field of medical instruments, and particularly relates to an automatic medicine suction and exhaust device of a CT (computed tomography) high-pressure injection system, which is applied to contrast agent injection and comprises a needle cylinder, a piston is mounted in the needle cylinder, a needle cylinder bubble sensor is mounted at an inlet of the needle cylinder, a push rod is coaxially mounted on one side of the piston, and a driving mechanism is connected onto the push rod. The first pipeline connecting piece is connected to an opening in the top end of the needle cylinder, one connecting end of the first pipeline connecting piece is connected with a medicine sucking mechanism, and the medicine sucking mechanism is used for supplementing medicine liquid to the needle cylinder in a one-way mode. Through mutual cooperation of the push rod, the needle cylinder bubble sensor, the medicine suction mechanism and the injection mechanism, medicine suction and exhaust processes of the high-pressure injection machine can be fully automatically carried out, the full-automatic high-pressure injection machine has the advantages of high efficiency, accuracy, reliability, safety and the like, and the problems that an existing high-pressure injection machine is tedious in operation, low in efficiency and low in safety are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an automatic medicine suction and exhaust device for a CT high-pressure injection system. Background Art

[0002] With the development of technologies such as X-rays, rapid film changers, image intensifiers, and artificial contrast agents, which are gradually being used clinically, high-pressure injectors have become an auxiliary device in radiological diagnosis and treatment systems. The basic function of a CT high-pressure injector is to quickly and accurately inject a sufficient amount of high-concentration X-ray contrast agent into the examination site through percutaneous puncture or through existing channels in the human body within a certain period of time, thereby enabling diagnostic imaging and treatment of lesions. However, in actual clinical use, bubbles may be adsorbed on the inner wall of the syringe when drawing saline or contrast agent, making it inconvenient to remove the bubbles. Therefore, we propose an automatic drug suction and exhaust device for a CT high-pressure injection system. Utility Model Content

[0003] The utility model aims to provide an automatic medicine aspirating and exhausting device for a CT high-pressure injection system, which can automatically complete the medicine aspirating, exhausting and injection processes.

[0004] To this end, the technical solution adopted in this utility model is:

[0005] CT high-pressure injection system automatic drug suction and exhaust device, used for contrast agent injection, including:

[0006] A syringe, wherein a piston is installed inside the syringe, a syringe bubble sensor is installed at the inlet of the syringe, a push rod is coaxially installed on one side of the piston, and a drive mechanism is connected to the push rod;

[0007] a first pipeline connector, the first pipeline connector being connected to the top opening of the syringe, and a drug suction mechanism being connected to one connecting end of the first pipeline connector, the drug suction mechanism being used to unidirectionally replenish the syringe with liquid medicine;

[0008] The injection mechanism is connected to one of the connection ends of the pipeline connector. The injection mechanism is used to perform a liquid medicine injection operation, and the liquid medicine flows unidirectionally from the syringe to the injection mechanism.

[0009] Based on the above technical solution, its use principle and the technical effects produced are as follows:

[0010] During the drug suction and exhaust operation, the syringe bubble sensor detects whether there is liquid in the current position of the syringe. If there is no liquid, the driving mechanism drives the push rod together with the piston to move upward. During the upward movement, if the syringe bubble sensor detects liquid or the syringe capacity is pushed to 0ML, the upward movement stops and the exhaust operation of the drug suction pipeline is started;

[0011] In the exhaust operation of the drug suction pipeline, the current position is recorded first, and the driving mechanism drives the push rod to move downward together with the piston to 10ML after the current position. At this time, the internal pressure of the injection syringe drops, and the liquid in the medicine bottle enters the injection syringe through the drug suction tube, the drug suction one-way valve, and the first pipeline connector in sequence under the action of atmospheric pressure. At this time, the injection one-way valve is automatically closed. After the piston moves downward to the above-set position, the syringe bubble sensor is started for detection. If the syringe bubble sensor detects that it is liquid, the device enters the drug suction process. If the syringe bubble sensor detects bubbles, the driving mechanism drives the piston upward to the initial recorded position. During the upward movement, if the syringe bubble sensor and the drug suction bubble sensor detect liquid at the same time, it indicates that the drug suction pipeline is exhausted and can safely enter the drug suction process. If the piston moves to the initial recorded position and the syringe bubble sensor and the drug suction bubble sensor still do not detect liquid at the same time, the drug suction pipeline is exhausted again. If the drug suction exhaust process has been performed twice and bubbles are still displayed, the entire process is terminated, and the medicine bottle is out of medicine.

[0012] During the drug inhalation operation, first inhale the medicine according to the pre-set inhalation volume. During the backward movement of the piston, the status of the drug inhalation bubble sensor is detected in real time. If the drug inhalation bubble sensor detects bubbles, it indicates that the current medicine bottle is empty, so stop inhaling the medicine and terminate the process. If the drug inhalation bubble sensor does not detect bubbles, the piston is driven to inhale to the target capacity value plus 5ML, and then the injection pipeline exhaust process can be entered.

[0013] During the injection line exhaust process, the driving mechanism drives the piston forward to the syringe bubble sensor or reaches the target drug aspiration capacity. If the syringe bubble sensor detects liquid at this time, and the internal volume of the syringe is less than the required drug aspiration capacity, it will jump to the drug aspiration process to aspirate again. It should be noted that after the entire process is completed, the current syringe status is detected. If it is a contrast agent syringe, 2ml of liquid is discharged forward to fill the contrast agent injection line separately, and then 10ml of saline is discharged forward to fill the entire injection line.

[0014] During injection, the pipeline output connector is connected to the patient pipeline, and the driving mechanism drives the push rod and the piston to move upward to push the medicine out of the syringe. The medicine flows through the injection one-way valve and the injection tube in turn, and flows out from the pipeline output connector and into the patient pipeline. During the injection process, the syringe bubble sensor and the injection bubble sensor monitor in real time whether there are bubbles in the injection syringe and the injection tube. If bubbles appear, the driving mechanism will be stopped urgently to prevent the bubbles from being injected into the human body.

[0015] In a preferred example, the present invention can be further configured as follows: the driving mechanism includes a motor and a screw rod fixedly connected to the output end of the motor, and the interior of the push rod is provided with an internal thread that is compatible with the screw rod.

[0016] In a preferred example, the present invention can be further configured as follows: the first pipeline connector is set as a three-way tube, the first connection port of the three-way tube is connected to the syringe, the second connection port is connected to the drug suction mechanism, and the third connection port is connected to the injection mechanism.

[0017] In a preferred example, the present invention can be further configured as follows: the drug suction mechanism includes a drug suction one-way valve connected to the pipeline connector, the top of the drug suction one-way valve is connected to a drug suction tube, the top of the drug suction tube is connected to a medicine bottle, and a drug suction bubble sensor is installed on one side of the drug suction tube.

[0018] In a preferred example, the present invention can be further configured as follows: the flow direction of the medicine suction one-way valve is from the medicine bottle to the syringe.

[0019] In a preferred example, the present invention can be further configured as follows: the injection mechanism includes an injection one-way valve connected to the pipeline connector, one end of the injection one-way valve is connected to a second pipeline connector, the second pipeline connector is a three-way tube, one of the connection ports is connected to an injection tube, an injection bubble sensor is installed on one side of the injection tube, and the bottom end of the injection tube is connected to a pipeline output connector.

[0020] In a preferred example, the present invention can be further configured as follows: the number of the drug suction mechanism and the syringe is set to two groups, and the remaining connection port of the second pipeline connector is connected to the drug suction mechanism and the syringe through a catheter.

[0021] The nouns, conjunctions or adjectives involved in the above technical solution are explained as follows:

[0022] A fixed connection is a connection in which parts or components are fixed without any relative movement. There are two types of connections: detachable and non-detachable.

[0023] (1) A removable connection is a method of fastening components together using screws, splines, wedge pins, etc. This type of connection allows for disassembly during maintenance without damaging the components. However, the connectors used must be of the correct specifications (e.g., length of bolts, keys, wedge pins) and properly tightened.

[0024] (2) Non-detachable connections mainly refer to welding, riveting and tenoning. Since they need to be disassembled by forging, sawing or oxygen cutting when repairing or replacing, spare parts generally cannot be reused. At the same time, when making connections, attention should be paid to the quality of workmanship, technical inspection and remedial measures (such as calibration, polishing, etc.);

[0025] An active connection is a connection in which parts or components are fixed so that they can move relative to each other.

[0026] The above technical solution of the utility model has the following beneficial technical effects:

[0027] 1. In the utility model, through the cooperation of the push rod, syringe bubble sensor, drug suction mechanism and injection mechanism, the drug suction and exhaust process of the high-pressure injection machine can be fully automatically carried out, which has the advantages of high efficiency, accuracy, reliability and safety, and solves the problems of cumbersome operation, low efficiency and low safety of the current high-pressure injection machine.

[0028] 2. In the present invention, by accumulating the time of each bubble sensor status in different time periods, it is possible to accurately determine whether there is gas in the pipeline and locate the gas position, and accurately determine the drug shortage status of the cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0030] Reference numerals:

[0031] 1. Driving mechanism; 2. Push rod; 3. Piston; 4. Syringe; 5. Syringe bubble sensor; 6. First pipeline connector; 7. Drug suction one-way valve; 8. Drug suction tube; 9. Drug suction bubble sensor; 10. Medicine bottle; 11. Injection one-way valve; 12. Second pipeline connector; 13. Injection bubble sensor; 14. Syringe; 15. Pipeline output connector. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure. It should be noted that the embodiments of the present utility model and the features in the embodiments can be combined with each other in the absence of conflict.

[0033] According to the concept of this application, Figure 1 The following describes an embodiment of an automatic drug aspiration and exhaust device for a CT high-pressure injection system for automatically injecting contrast agents. Specifically, the automatic drug aspiration and exhaust device for a CT high-pressure injection system is constructed as an integrated structure, comprising three components: a syringe 4, a drug aspiration mechanism, and an injection mechanism. Through the coordinated operation of a push rod 2, a syringe bubble sensor 5, the drug aspiration mechanism, and the injection mechanism, the high-pressure injection machine's drug aspiration and exhaust processes can be fully automated, offering advantages such as high efficiency, accuracy, reliability, and safety, addressing the current issues with high-pressure injection machines, such as cumbersome operation, low efficiency, and low safety.

[0034] Combine Figure 1 As shown, the automatic drug suction and exhaust device of the CT high-pressure injection system provided by the present invention is applied to contrast agent injection, and includes:

[0035] A syringe 4, wherein a piston 3 is installed inside the syringe 4, a syringe bubble sensor 5 is installed at the inlet of the syringe 4, a push rod 2 is coaxially installed on one side of the piston 3, and a driving mechanism 1 is connected to the push rod 2;

[0036] A first pipe connector 6 is connected to the top opening of the syringe 4, and one connecting end of the first pipe connector 6 is connected to a drug suction mechanism for unidirectionally replenishing the syringe 4 with liquid medicine;

[0037] The injection mechanism is connected to one of the connection ends of the pipeline connector. The injection mechanism is used to perform a liquid medicine injection operation, and the liquid medicine flows unidirectionally from the syringe 4 to the injection mechanism.

[0038] According to the technical solution of this embodiment, the driving mechanism 1 includes a motor and a screw rod fixedly connected to the output end of the motor. The interior of the push rod 2 is provided with an internal thread that is compatible with the screw rod. The motor is started to drive the screw rod to rotate. The meshing relationship between the screw rod and the internal thread can be used to drive the push rod 2 to move in the syringe 4, thereby driving the piston 3 to move accordingly. In this way, the rotation of the motor can be converted into linear motion of the piston 3. It should be noted that when the push rod 2 moves, a guide rod (not shown in the figure) is provided from the outside. The provided guide rod is used to guide the push rod 2 to avoid this from happening.

[0039] According to the technical solution of this embodiment, the first pipeline connector 6 is set as a three-way tube, the first connection port of the three-way tube is connected to the syringe 4, the second connection port is connected to the drug suction mechanism, and the third connection port is connected to the injection mechanism.

[0040] According to the technical solution of this embodiment, the drug suction mechanism includes a drug suction one-way valve 7 connected to the pipeline connector. The flow direction of the drug suction one-way valve 7 is from the medicine bottle 10 to the syringe 4. The top of the drug suction one-way valve 7 is connected to the drug suction tube 8. The top of the drug suction tube 8 is connected to the medicine bottle 10. The medicine bottle 10 is used to store the medicine liquid, and a drug suction bubble sensor 9 is installed on one side of the drug suction tube 8 to detect whether there are bubbles in the drug suction tube 8. When the drug suction and exhaust operation is required, the syringe bubble sensor 5 is used to detect whether there is liquid at the current position of the syringe 4. If there is no liquid, the driving mechanism 1 drives the push rod 2 together with the piston 3 to move upward. During the upward movement, if the syringe bubble sensor 5 detects liquid or the capacity of the syringe 4 is pushed to 0ML, it stops rising, and then the exhaust operation of the drug suction tube 8 can be started.

[0041] According to the technical solution of this embodiment, the injection mechanism includes an injection one-way valve 11 connected to the pipeline connector, one end of the injection one-way valve 11 is connected to the second pipeline connector 12, the second pipeline connector 12 is a three-way tube, one of the connection ports is connected to the injection tube 14, an injection bubble sensor 13 is installed on one side of the injection tube 14, and the bottom end of the injection tube 14 is connected to the pipeline output connector 15. In the exhaust process of the injection tube 14, the piston 3 moves forward to the syringe bubble sensor 5 or reaches the target drug aspiration capacity. If there is liquid in the syringe bubble sensor 5, the internal capacity of the syringe 4 is less than the required drug aspiration capacity, then the drug aspiration process is jumped to re-aspirate the drug. After the entire process is completed, the current state of the syringe 4 is detected. If it is a contrast agent syringe 4, 2ML of liquid is discharged forward to fill the contrast agent separate injection tube 14, and then 10ML of saline is discharged forward to fill the entire syringe 14.

[0042] During injection, the pipeline output connector 15 is connected to the patient pipeline, and the driving mechanism 1 drives the push rod 2 to move upward together with the piston 3 to push the liquid medicine out of the syringe 4. The liquid medicine flows through the injection one-way valve 11 and the injection tube 14 in sequence, and flows out from the pipeline output connector 15 and enters the patient pipeline. During the injection process, the syringe bubble sensor 5 and the injection bubble sensor 13 monitor in real time whether there are bubbles in the injection syringe 4 and the injection tube 14. If bubbles appear, the driving mechanism 1 is stopped urgently to prevent the bubbles from being injected into the human body.

[0043] According to the technical solution of this embodiment, the number of drug suction mechanisms and syringes 4 is set to two groups, and the remaining connection ports of the second pipeline connector 12 are connected to the drug suction mechanism and syringe 4 through catheters, one group is used to inject saline, and the other group is used to inject contrast agent.

[0044] The status of the two syringes 4 is detected by the bubble sensor, and then the air is exhausted. In principle, the exhaust process follows the principle of less contrast agent and more saline. On the basis of the bilateral independent drug aspiration process, the action of the contrast agent syringe 4 is determined in combination with the drug aspiration status of the other side. After the contrast agent syringe 4 empties its own separate pipeline, the saline syringe 4 empties the subsequent common pipeline.

[0045] It should be noted that a bubble sensor usually consists of two parts: a bubble generator and a bubble sensor; the bubble generator is usually a small nozzle that injects gas into the liquid through the nozzle to form bubbles. The bubble sensor is usually a photoelectric sensor used to detect the movement of bubbles. When bubbles pass through the photoelectric sensor, they block light, thereby generating an electrical signal. By measuring the frequency and amplitude of this electrical signal, the speed and number of bubbles can be calculated. With respect to the technical solution of this embodiment, the syringe bubble sensor 5, the injection bubble sensor 13, and the drug inhalation bubble sensor 9 are all set to SONOTEC bubble detection sensors SonOCHECK ABD06.

[0046] Specifically, when performing the drug suction and exhaust operation, the syringe bubble sensor 5 detects whether there is liquid at the current position of the syringe 4. If there is no liquid, the driving mechanism 1 drives the push rod 2 together with the piston 3 to move upward. During the upward movement, if the syringe bubble sensor 5 detects liquid or the volume of the syringe 4 is pushed to 0ML, the upward movement stops and the exhaust operation of the drug suction tube 8 is started;

[0047] In the exhaust operation of the drug suction tube 8, the current position is first recorded, and the driving mechanism 1 drives the push rod 2 together with the piston 3 to move downward to 10ML behind the current position. At this time, the internal pressure of the injection syringe 4 drops, and the liquid medicine in the medicine bottle 10 enters the injection syringe 4 through the drug suction tube 8, the drug suction one-way valve 7, and the first pipeline connector 6 in sequence under the action of atmospheric pressure. At this time, the injection one-way valve 11 is automatically closed. After the piston 3 moves downward to the above-set position, the syringe bubble sensor 5 is started for detection. If the syringe bubble sensor 5 detects liquid, the device enters the drug suction process. If the syringe bubble sensor 5 detects bubbles, the driving mechanism 1 drives the piston 3 to move upward to the initial recording position. During the upward movement, if the syringe bubble sensor 5 and the medicine inhalation bubble sensor 9 simultaneously detect liquid, it indicates that the medicine inhalation tube 8 is exhausted and the medicine inhalation process can be safely entered. If the piston 3 moves to the initial recording position and the syringe bubble sensor 5 and the medicine inhalation bubble sensor 9 still do not detect liquid at the same time, the medicine inhalation tube 8 is exhausted again. If the medicine inhalation exhaust process has been performed twice and bubbles are still displayed, the whole process is terminated, and the medicine bottle 10 is prompted to be out of medicine.

[0048] During the drug inhalation operation, the medicine is first inhaled according to the pre-set drug inhalation volume. During the backward movement of the piston 3, the status of the drug inhalation bubble sensor 9 is detected in real time. If the drug inhalation bubble sensor 9 detects bubbles, it indicates that the current drug liquid in the medicine bottle 10 is empty, and the drug inhalation is stopped and the process is terminated. If the drug inhalation bubble sensor 9 does not detect bubbles, the piston 3 is driven to inhale to the target capacity value plus 5ML, and then the 14-way exhaust process of the injection tube can be entered.

[0049] In the exhaust process of the syringe 14, the driving mechanism 1 drives the piston 3 forward to the syringe bubble sensor 5 or reaches the target drug aspiration capacity. If the syringe bubble sensor 5 detects liquid at this time, and the internal capacity of the syringe 4 is less than the required drug aspiration capacity, it jumps to the drug aspiration process to aspirate again. It should be noted that after the entire process is completed, the current state of the syringe 4 is detected. If it is a contrast agent syringe 4, 2 ml of liquid is discharged forward to fill the contrast agent syringe 14, and then 10 ml of saline is discharged forward to fill the entire syringe 14;

[0050] During injection, the pipeline output connector 15 is connected to the patient pipeline, and the driving mechanism 1 drives the push rod 2 to move upward together with the piston 3 to push the medicine out of the syringe 4. The medicine flows through the injection one-way valve 11 and the injection tube 14 in turn, and flows out from the pipeline output connector 15 and enters the patient pipeline. During the injection process, the syringe bubble sensor 5 and the injection bubble sensor 13 monitor in real time whether there are bubbles in the injection syringe 4 and the injection tube 14. If bubbles appear, the driving mechanism 1 is stopped urgently to prevent the bubbles from being injected into the human body.

[0051] The automatic drug aspiration and exhaust device of the CT high-pressure injection system provided by the present invention will be further described below in conjunction with the accompanying drawings and implementation examples.

[0052] CT high-pressure injection system automatic drug suction and exhaust device, used for contrast agent injection, including:

[0053] A syringe 4, wherein a piston 3 is installed inside the syringe 4, a syringe bubble sensor 5 is installed at the inlet of the syringe 4, a push rod 2 is coaxially installed on one side of the piston 3, and a driving mechanism 1 is connected to the push rod 2;

[0054] A first pipe connector 6 is connected to the top opening of the syringe 4, and one connecting end of the first pipe connector 6 is connected to a drug suction mechanism for unidirectionally replenishing the syringe 4 with liquid medicine;

[0055] The injection mechanism is connected to one of the connection ends of the pipeline connector. The injection mechanism is used to perform a liquid medicine injection operation, and the liquid medicine flows unidirectionally from the syringe 4 to the injection mechanism.

[0056] The working principle and use process of the utility model are as follows: when performing the drug suction and exhaust operation, the syringe bubble sensor 5 detects whether there is liquid in the current position of the syringe 4. If there is no liquid, the driving mechanism 1 drives the push rod 2 together with the piston 3 to move upward. During the upward movement, if the syringe bubble sensor 5 detects liquid or the capacity of the syringe 4 is pushed to 0ML, the upward movement stops and the exhaust operation of the drug suction tube 8 is started;

[0057] In the exhaust operation of the drug suction tube 8, the current position is first recorded, and the driving mechanism 1 drives the push rod 2 together with the piston 3 to move downward to 10ML behind the current position. At this time, the internal pressure of the injection syringe 4 drops, and the liquid medicine in the medicine bottle 10 enters the injection syringe 4 through the drug suction tube 8, the drug suction one-way valve 7, and the first pipeline connector 6 in sequence under the action of atmospheric pressure. At this time, the injection one-way valve 11 is automatically closed. After the piston 3 moves downward to the above-set position, the syringe bubble sensor 5 is started for detection. If the syringe bubble sensor 5 detects liquid, the device enters the drug suction process. If the syringe bubble sensor 5 detects bubbles, the driving mechanism 1 drives the piston 3 to move upward to the initial recording position. During the upward movement, if the syringe bubble sensor 5 and the medicine inhalation bubble sensor 9 simultaneously detect liquid, it indicates that the medicine inhalation tube 8 is exhausted and the medicine inhalation process can be safely entered. If the piston 3 moves to the initial recording position and the syringe bubble sensor 5 and the medicine inhalation bubble sensor 9 still do not detect liquid at the same time, the medicine inhalation tube 8 is exhausted again. If the medicine inhalation exhaust process has been performed twice and bubbles are still displayed, the whole process is terminated, and the medicine bottle 10 is prompted to be out of medicine.

[0058] During the drug inhalation operation, the medicine is first inhaled according to the pre-set drug inhalation volume. During the backward movement of the piston 3, the status of the drug inhalation bubble sensor 9 is detected in real time. If the drug inhalation bubble sensor 9 detects bubbles, it indicates that the current drug liquid in the medicine bottle 10 is empty, and the drug inhalation is stopped and the process is terminated. If the drug inhalation bubble sensor 9 does not detect bubbles, the piston 3 is driven to inhale to the target capacity value plus 5ML, and then the 14-way exhaust process of the injection tube can be entered.

[0059] In the exhaust process of the syringe 14, the driving mechanism 1 drives the piston 3 forward to the syringe bubble sensor 5 or reaches the target drug aspiration capacity. If the syringe bubble sensor 5 detects liquid at this time, and the internal capacity of the syringe 4 is less than the required drug aspiration capacity, it jumps to the drug aspiration process to aspirate again. It should be noted that after the entire process is completed, the current state of the syringe 4 is detected. If it is a contrast agent syringe 4, 2 ml of liquid is discharged forward to fill the contrast agent syringe 14, and then 10 ml of saline is discharged forward to fill the entire syringe 14;

[0060] During injection, the pipeline output connector 15 is connected to the patient pipeline, and the driving mechanism 1 drives the push rod 2 to move upward together with the piston 3 to push the medicine out of the syringe 4. The medicine flows through the injection one-way valve 11 and the injection tube 14 in turn, and flows out from the pipeline output connector 15 and enters the patient pipeline. During the injection process, the syringe bubble sensor 5 and the injection bubble sensor 13 monitor in real time whether there are bubbles in the injection syringe 4 and the injection tube 14. If bubbles appear, the driving mechanism 1 is stopped urgently to prevent the bubbles from being injected into the human body.

[0061] In the present invention, the term "plurality" refers to two or more than two, unless otherwise expressly defined. The term "and / or" used herein includes any and all combinations of one or more of the relevant listed items. Terms such as "installation", "connection", "connection", and "fixed" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0062] It should be noted that when an element is referred to as being "assembled to," "mounted to," "fixed to," or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0063] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0064] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. CT high pressure injection system automatic drug suction and exhaust device, used for contrast agent injection, characterized by: include: A syringe (4), wherein a piston (3) is installed inside the syringe (4), a syringe bubble sensor (5) is installed at the inlet of the syringe (4), a push rod (2) is coaxially installed on one side of the piston (3), and a driving mechanism (1) is connected to the push rod (2); A first pipeline connector (6), the first pipeline connector (6) is connected to the top opening of the syringe (4), and one connection end of the first pipeline connector (6) is connected to a drug suction mechanism, the drug suction mechanism is used to replenish the syringe (4) with liquid medicine in a one-way manner; An injection mechanism is connected to one of the connection ends of the pipeline connector, and the injection mechanism is used to perform a liquid medicine injection operation, and the liquid medicine flows from the syringe (4) to the injection mechanism in a unidirectional manner.

2. The automatic drug aspiration and exhaust device for a CT high-pressure injection system according to claim 1, characterized in that: The driving mechanism (1) comprises a motor and a screw rod fixedly connected to the output end of the motor, and the push rod (2) is provided with an internal thread adapted to the screw rod.

3. The automatic drug aspiration and exhaust device for a CT high-pressure injection system according to claim 2, characterized in that: The first pipeline connector (6) is configured as a three-way pipe, the first connection port of the three-way pipe is connected to the syringe (4), the second connection port is connected to the drug suction mechanism, and the third connection port is connected to the injection mechanism.

4. The automatic drug aspiration and exhaust device for a CT high-pressure injection system according to claim 2, characterized in that: The drug suction mechanism comprises a drug suction one-way valve (7) connected to a pipeline connector, the top end of the drug suction one-way valve (7) is connected to a drug suction tube (8), the top end of the drug suction tube (8) is connected to a medicine bottle (10), and a drug suction bubble sensor (9) is installed on one side of the drug suction tube (8).

5. The automatic drug aspiration and exhaust device for a CT high-pressure injection system according to claim 4, characterized in that: The flow direction of the medicine inhalation one-way valve (7) is from the medicine bottle (10) to the syringe (4).

6. The automatic drug aspiration and exhaust device for a CT high-pressure injection system according to claim 5, characterized in that: The injection mechanism comprises an injection one-way valve (11) connected to a pipeline connector, one end of the injection one-way valve (11) is connected to a second pipeline connector (12), the second pipeline connector (12) is a three-way pipe, one connection port of which is connected to an injection tube (14), an injection bubble sensor (13) is installed on one side of the injection tube (14), and the bottom end of the injection tube (14) is connected to a pipeline output connector (15).

7. The automatic drug aspiration and exhaust device for a CT high-pressure injection system according to claim 6, characterized in that: The number of the drug suction mechanism and the syringe (4) is set to two groups, and the remaining connection port of the second pipeline connector (12) is connected to the drug suction mechanism and the syringe (4) through a catheter.

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