Cascade control method for normal saline and contrast agent and infusion device

Abstract

The invention discloses a cascade control method for normal saline and a contrast agent and an infusion device. The cascade control method for the normal saline and the contrast agent comprises the following steps: starting instillation of the normal saline; judging whether radiography operation is started or not; if yes, instillation of the normal saline is stopped, and the radiography operation is started. And if not, continuing to instill the normal saline. When radiography operation is started, instillation of normal saline can be stopped immediately, switching between the injection state of the contrast agent and the instillation state of the normal saline is completed, and highly cooperative control over the contrast agent and the normal saline is achieved through clear state division and an automatic switching mechanism. And when a contrast agent is needed, dripping of normal saline can be stopped in time, the concentration of the contrast agent is prevented from being diluted, the contrast effect is greatly improved, and therefore the operation risk of an operation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of interventional surgery, and in particular to a cascade control method and an infusion device of physiological saline and contrast agent. Background Art

[0002] During vascular interventional surgery, doctors need to assist with contrast agent and saline injection to ensure the normal operation. When it is necessary to observe the distribution of blood vessels, contrast agents need to be injected to assist in the generation of vascular imaging. The continuous infusion of saline is to ensure the lubrication of blood vessels and catheters and prevent the contrast agent from solidifying. This process requires doctors to frequently manually inject contrast agents and adjust the input of saline with a syringe. When injecting contrast agents, saline is controlled by other machines and continues to be infused without being manually stopped, resulting in the dilution of the contrast agent concentration, unclear contrast effects, and increased operational risks of the surgery. Summary of the invention

[0003] The main purpose of the present invention is to provide a cascade control method and infusion device of physiological saline and contrast agent, aiming to solve the technical problem that when injecting contrast agent, the physiological saline is controlled by other machines and continues to be infused without being manually stopped, resulting in the dilution of the contrast agent concentration, the lack of obvious contrast effect, and increased operational risks of the operation.

[0004] In order to achieve the above-mentioned object of the invention, the first aspect of the present invention provides a cascade control method of physiological saline and contrast agent.

[0005] A cascade control method of physiological saline and contrast agent comprises the following steps:

[0006] Start a saline drip;

[0007] Determine whether to start the imaging operation;

[0008] If yes, then the infusion of the physiological saline is turned off and the angiography operation is started;

[0009] If not, continue the angiography procedure by instilling the angiography.

[0010] In one embodiment, after the step of closing the dripping of the physiological saline and starting the angiography operation, the step further includes:

[0011] Determining whether the imaging operation is completed;

[0012] If the angiography operation is completed, determining whether it is necessary to drip the physiological saline;

[0013] If the physiological saline solution needs to be dripped, the physiological saline solution is dripped;

[0014] If the infusion of the physiological saline is not required, the infusion of the physiological saline is stopped.

[0015] In one embodiment, the step of starting the infusion of physiological saline comprises:

[0016] Obtaining the infusion parameters of the physiological saline;

[0017] The infusion of the physiological saline is started according to the infusion parameters.

[0018] In one embodiment, before the step of closing the dripping of the physiological saline and starting the angiography operation, the step further includes:

[0019] The injection parameters of the contrast agent are obtained.

[0020] In one embodiment, the injection parameters of the contrast agent include the injection speed of the contrast agent and the dosage of the contrast agent.

[0021] In one embodiment, before the step of starting the dripping of physiological saline, the method further comprises:

[0022] The pipeline for dripping the physiological saline is vented.

[0023] In one embodiment, after the step of starting the dripping of physiological saline, the method further comprises:

[0024] Detecting the pressure of the physiological saline drip; and / or detecting bubbles in the physiological saline;

[0025] When the pressure of the physiological saline drip is detected to be abnormal, and / or bubbles are detected to be present in the physiological saline;

[0026] It is determined that the instillation of physiological saline is abnormal.

[0027] In one embodiment, after the step of initiating the injection of the contrast agent, the step further includes:

[0028] detecting the pressure of the contrast agent injection; and / or detecting bubbles in the contrast agent;

[0029] When the pressure of the contrast medium injection is detected to be abnormal; and / or bubbles are detected in the contrast medium;

[0030] It is determined that the injection of the contrast agent is abnormal.

[0031] A second aspect of the present invention provides an infusion device for physiological saline and contrast agent, the infusion device executing the above-mentioned cascade control method, comprising a physiological saline control unit, a contrast agent control unit and a main control board, the main control board being connected to the physiological saline control unit and the contrast agent control unit respectively, the main control board being used to send a first instruction to the physiological saline control unit, the physiological saline control unit being used to receive the first instruction, and controlling the dripping of the physiological saline based on the first instruction;

[0032] The main control board is further used to send a second instruction to the contrast agent control unit, and the contrast agent control unit is used to receive the second instruction and control the injection of the contrast agent based on the second instruction.

[0033] In one embodiment, the physiological saline control unit includes a first motor chip and a first motor, wherein the first motor chip is used to receive the first instruction of the physiological saline drip parameter sent by the main control board and drive the first motor to move, so as to control the physiological saline to drip according to the physiological saline drip parameter;

[0034] The contrast agent control unit includes a second motor chip and a second motor. The second motor chip is used to receive the second instruction of the contrast agent injection parameter sent by the main control board and drive the second motor to move, so as to control the contrast agent to be injected according to the contrast agent injection parameter.

[0035] Beneficial effects:

[0036] The cascade control method of physiological saline and contrast agent of the present invention comprises: starting the dripping of physiological saline; judging whether to start the contrast operation; if so, closing the dripping of the physiological saline and starting the contrast operation. When the contrast operation is started, the dripping of the physiological saline can be stopped immediately, and the switching between the injection state of the contrast agent and the dripping state of the physiological saline is completed. Through the clear state division and automatic switching mechanism, a high degree of coordinated control of the contrast agent and the physiological saline is achieved. When the contrast agent is needed, the dripping of the physiological saline can be stopped in time to avoid the dilution of the concentration of the contrast agent, which greatly improves the contrast effect and reduces the operation risk of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 The figure is a schematic structural diagram of a physiological saline and contrast agent infusion device according to an embodiment of the present invention.

[0038] Figure 2 The present invention is a flowchart of a cascade control method of physiological saline and contrast agent according to an embodiment of the present invention.

[0039] Figure 3 The present invention is a flowchart of a cascade control method of physiological saline and contrast agent according to an embodiment of the present invention.

[0040] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] like Figure 1As shown, in some embodiments, a physiological saline and contrast agent infusion device is provided. A physiological saline and contrast agent infusion device includes a physiological saline control unit, a contrast agent control unit and a main control board. The main control board is electrically connected to the physiological saline control unit and the contrast agent control unit, respectively. The main control board is used to send a first instruction to the physiological saline control unit, and the physiological saline control unit is used to receive the first instruction sent by the main control board, and control the infusion of physiological saline based on the first instruction. The main control board is also used to send a second instruction to the contrast agent control unit, and the contrast agent control unit is used to receive the second instruction sent by the main control board, and control the injection of the contrast agent based on the second instruction.

[0046] Specifically, the main control board can set contrast agent and saline parameters. Medical staff can set the parameters of the contrast agent injection controller and the saline control unit through the main control board, such as the injection speed of the contrast agent, the drip speed of the saline, the injection volume of the contrast agent, and the drip volume of the saline.

[0047] Specifically, the main control panel may be an infusion information main control panel. The main control panel has the function of information display. The main control panel may display the relevant infusion information of contrast agent and saline. The infusion information may include the injection speed of contrast agent, the dripping speed of saline, the remaining amount of contrast agent and saline, the injected amount of contrast agent, the dripping amount of saline, etc. Medical staff can intuitively understand the progress and status of infusion.

[0048] Specifically, the physiological saline control unit may control the dripping speed and the dripping volume of the physiological saline based on the first instruction.

[0049] Specifically, the physiological saline control unit includes a first motor chip and a first motor. The first motor chip is used to receive a first instruction of a physiological saline drip parameter sent by the main control board and drive the first motor to move, so as to control the physiological saline to drip according to the physiological saline drip parameter. More specifically, the model of the first motor chip can be TMC5130.

[0050] Specifically, the contrast agent control unit can accurately control the injection amount of contrast agent. In the medical imaging process, the amount of contrast agent needs to be strictly controlled. The contrast agent injection controller can accurately adjust the injection speed and injection amount of the contrast agent according to the specific examination type (such as CT angiography, angiography, etc.), patient weight, condition and other factors.

[0051] The contrast medium control unit can also control the injection time of the contrast medium. The contrast medium control unit can start and stop the injection of the contrast medium at the appropriate time point according to the preset program. For example, in angiography, the contrast medium needs to be injected at the best time for vascular imaging to obtain clear vascular images. The contrast medium injection controller can accurately grasp the injection time.

[0052] The contrast agent control unit can adjust the injection pressure of the contrast agent to ensure that the contrast agent is injected into the human body at an appropriate pressure to avoid damage to blood vessels or tissues due to excessive pressure, while ensuring that the injection is completed within the specified time.

[0053] Specifically, the contrast agent control unit includes a second motor chip and a second motor, and the second motor chip is used to receive a second instruction of contrast agent injection parameters sent by the main control board and drive the second motor to move, so as to control the contrast agent to be injected according to the contrast agent injection parameters. More specifically, the model of the second motor chip can be TMC5130.

[0054] like Figure 2 and Figure 3 As shown, in some embodiments, a cascade control method of physiological saline and contrast agent, applied to the above-mentioned infusion device, includes the following steps:

[0055] S100: Start the infusion of normal saline.

[0056] S200: Determine whether to start the imaging operation.

[0057] S300: If yes, then turn off the infusion of normal saline and start the angiography operation.

[0058] S400: If not, continue dripping normal saline.

[0059] It should be noted that in the related art, the infusion of contrast agent and saline is controlled by different instruments, and precise coordination cannot be achieved. When injecting contrast agent, saline is controlled by other machines, and the infusion of saline is not stopped manually in time, resulting in the dilution of contrast agent concentration and the problem of unclear contrast effect. In this embodiment, the infusion of saline is started, and when the contrast agent is injected, the infusion of saline can be stopped immediately, and the switching of the saline infusion state and the contrast agent injection state is completed, so as to avoid the infusion of saline during the injection of contrast agent, resulting in the dilution of the contrast agent concentration, and ensure the obvious contrast effect, thereby reducing the operational risk of the operation. In addition, the injection of contrast agent and the infusion of saline do not require frequent manual adjustment, which shortens the operation time and improves the efficiency of the operation.

[0060] Specifically, the step S100 of starting the dripping of physiological saline includes:

[0061] S110, obtaining infusion parameters of physiological saline.

[0062] S120: Start the infusion of normal saline according to the infusion parameters.

[0063] Specifically, the infusion parameter may be the infusion rate of the physiological saline.

[0064] It should be noted that in the related art, the infusion of saline can only rely on the doctor's sensory input, and it is impossible to achieve an accurate and stable input. In this embodiment, precise control is performed through the main control board and the saline control unit to avoid the uncertainty of the subjective sensory input of medical staff, thereby ensuring the accuracy and stability of the saline input.

[0065] Specifically, the saline drip rate is set according to the patient's weight. The patient's weight information is entered into the infusion device, and the system automatically calculates and sets the saline drip rate according to the preset weight-drip rate algorithm. For example, 0.2 ml of saline is dripped per kilogram of body weight per minute. With this setting, the input amount of saline can be more accurately controlled according to individual differences of patients, avoiding the problem of too fast or too slow drip rate caused by different body shapes of patients. For patients with lighter weight, saline overload can be prevented. For patients with heavier weight, the pipeline can be kept fully moist and unobstructed.

[0066] Specifically, the drip rate is set based on different angiography sites. According to the angiography site (such as coronary angiography, cerebral angiography, abdominal organ angiography, etc.), different drip rate schemes are preset in the infusion device. For example, for coronary angiography, a slower rate (10-15 drops per minute) of normal saline drip is selected. For cerebral angiography, an even slower rate (5-10 drops per minute) of normal saline drip is selected. Blood vessels and tissues in different parts have different tolerance to osmotic pressure and liquid volume. Through this targeted selection, the physiological state of local blood vessels and tissues can be better maintained, the adverse effects on the angiography site can be reduced, and the safety and accuracy of angiography can be improved.

[0067] Specifically, the rate of saline dripping can be adjusted in stages. In the initial stage after starting saline dripping, a higher drip rate (such as 30-40 drops per minute) is set for 2-3 minutes to quickly flush the infusion pipeline, and then the drip rate is reduced to a maintenance rate (such as 15-20 drops per minute) until the angiography operation begins.

[0068] In some embodiments, before the step S100 of starting the dripping of physiological saline, the step further includes:

[0069] S130, venting the pipeline for dripping physiological saline.

[0070] It should be noted that venting the pipeline can effectively remove the air in the pipeline, prevent air from entering the patient's body, and thus reduce the risk of air embolism.

[0071] Specifically, the exhaust operation can be a segmented extrusion exhaust method, a pre-filling exhaust method, or a negative pressure suction exhaust method.

[0072] In some embodiments, after the step S100 of starting the dripping of physiological saline, the step further includes:

[0073] S140: Determine whether to stop dripping saline.

[0074] S150: If yes, then end the infusion of normal saline.

[0075] It should be noted that a flow sensor is installed on the infusion pipeline. The flow sensor can detect the dripping of physiological saline. When the flow rate of physiological saline is zero, it is judged that the dripping of physiological saline has stopped. When the flow rate of physiological saline is not zero, it is judged that the physiological saline is still dripping. In addition, a drip rate monitoring device can also be used to judge the dripping state of physiological saline by observing the formation frequency of droplets. If the formation of physiological saline droplets is not detected within a certain period of time, it is judged that the dripping of physiological saline has stopped.

[0076] The end of saline drip can be achieved by controlling the infusion pump to stop working or closing the relevant valves on the infusion line. This step can create suitable conditions for contrast agent injection. If saline continues to drip, it may dilute the contrast agent, affect the contrast effect, cause image quality to decline, and fail to accurately display the parts or lesions that need to be observed. At the same time, stopping saline drip in time can also help maintain fluid balance in the body and reduce unnecessary fluid input, reducing the risk of possible complications.

[0077] In some embodiments, after the step S100 of starting the dripping of physiological saline, the step further includes:

[0078] S160, detecting the pressure of the physiological saline drip.

[0079] S161, determining whether the pressure of the physiological saline drip is within a preset pressure range.

[0080] S162: If not, determine that the pressure of the physiological saline drip is abnormal.

[0081] It should be noted that detecting the pressure of saline drip can ensure the safety of the infusion process. If the pressure of saline drip is too high, it may cause the infusion tube to rupture or the connection to fall off, causing saline to leak, increasing the risk of infection and causing local tissue damage to the patient. If the pressure is too low, saline drip may be poor or even stopped, affecting the progress of infusion and the treatment effect.

[0082] Specifically, the pressure of saline drip is detected by a pressure sensor. A pressure sensor is installed on the infusion line near the needle or infusion pump. The pressure sensor can convert the sensed pressure into an electrical signal and transmit it to the monitoring device to display the pressure value. When the pressure exceeds the preset normal range (such as the high pressure threshold and the low pressure threshold), the monitoring device will sound an alarm to alert medical staff.

[0083] In some embodiments, after the step S100 of starting the dripping of physiological saline, the step further includes:

[0084] S170, detecting bubbles in the physiological saline solution.

[0085] S171. If bubbles exist in the physiological saline solution, it is determined that the bubbles in the physiological saline solution are abnormal.

[0086] Specifically, bubbles in saline are detected by bubble sensors. The detection of saline bubbles allows medical staff to take measures before bubbles enter the patient's body, such as suspending infusion, removing bubbles, etc. This helps optimize medical operation processes, reduce the number of infusion interruptions caused by bubble problems, and improve medical efficiency.

[0087] In some embodiments, as described in the above step S200: determine whether to start the imaging operation.

[0088] There are many criteria for determining whether to start the imaging operation. For example, the medical staff may manually trigger the start command on the operation interface. When the patient is ready and the imaging equipment is debugged, the medical staff presses the start button of the imaging operation. In addition, it can be automatically determined according to the preset program logic. For example, when the patient's vital signs are stable within a specific range, the examination time reaches the preset value, and the communication feedback with other related medical equipment (such as imaging equipment) meets the conditions, the system automatically determines that the imaging operation can be started.

[0089] In some embodiments, before the step S300 of closing the dripping of physiological saline and starting the angiography operation, the step further includes:

[0090] S310, obtaining injection parameters of contrast agent.

[0091] Specifically, the injection parameters of the contrast medium include the injection speed of the contrast medium and the dosage of the contrast medium.

[0092] It should be noted that the injection speed and dosage parameters of the contrast agent are manually input on the operation interface of the main control panel, and the contrast agent control unit performs injection according to the injection speed and dosage parameters.

[0093] Precise control is performed through the main control board and contrast agent control unit to avoid the uncertainty of subjective sensory input from medical staff, thereby ensuring the accuracy and stability of contrast agent input.

[0094] The injection speed and dosage of contrast agents directly affect the angiography effect. Different examination sites, individual differences of patients (such as weight, age, physical condition, etc.) and types of diseases all require specific contrast agent injection parameters. For example, in coronary angiography, in order to clearly show the degree of stenosis and lesion characteristics of the coronary arteries, it is necessary to determine the appropriate contrast agent injection speed and dosage based on the patient's heart function, vascular conditions, etc., to ensure that the contrast agent can form a good image in the coronary artery without causing excessive burden on the heart.

[0095] When the injection speed and dosage parameters of the contrast agent are obtained, the contrast agent control unit will accurately control the injection process of the contrast agent according to the parameters. Taking the injection speed as an example, the injection pump in the contrast agent control unit will push the contrast agent into the infusion line at a stable flow rate and finally inject it into the patient's body. During the injection process, the contrast agent control unit will monitor the actual injection speed of the contrast agent in real time to ensure that the injection speed is consistent with the set value. If the injection speed deviates, such as abnormal injection speed due to pipeline blockage or pressure changes, the contrast agent control unit will immediately issue an alarm and take corresponding corrective measures, such as adjusting the pump power or stopping the injection.

[0096] For contrast medium dosage control, the contrast medium control unit will accurately measure the volume of contrast medium that has been injected into the patient's body. When the preset dose is reached, the injection stops automatically.

[0097] In the related art, the common specification of manual injection of contrast agent is 10ml, which cannot realize continuous multiple injections of contrast agent, and frequent manual refilling increases the risk of bacterial cross infection. In this embodiment, the container of the contrast agent syringe is 100ml, which can be injected multiple times without manual refilling, reducing the risk of cross infection.

[0098] In some embodiments, after the step S300 of turning off the infusion of physiological saline and starting the angiography operation, the following steps are further included:

[0099] S320, detecting the pressure of contrast agent injection.

[0100] S321. Determine whether the contrast agent injection pressure is within a preset pressure range.

[0101] S322: If not, determine that the pressure of contrast agent injection is abnormal.

[0102] It should be noted that the pressure of contrast agent injection is detected by a pressure sensor. A pressure sensor is installed between the injection pump and the infusion pipeline of the contrast agent control unit. When the contrast agent flows in the pipeline, the pressure sensor can sense the pressure change in real time. The pressure sensor can accurately measure the injection pressure of the contrast agent and transmit the data to the main control board for display and analysis. The contrast agent control unit can set a safe pressure threshold. When the injection pressure exceeds the upper threshold or falls below the lower threshold, the monitoring device will sound an alarm. Medical staff can take timely measures based on the alarm, such as adjusting the injection speed, checking whether the pipeline is unobstructed, etc.

[0103] Too high contrast agent injection pressure may cause blood vessel rupture or damage, especially in patients with fragile blood vessels. By monitoring the pressure of contrast agent injection through a pressure sensor, the injection pressure of contrast agent can be controlled within a safe range to avoid physical damage to blood vessels.

[0104] Abnormal contrast agent injection pressure may also mean that there is a problem with the injection path, such as a blockage or bend in the tube. This step can ensure that the contrast agent can be injected into the body smoothly. If the contrast agent injection pressure is too low, the contrast agent may not enter the blood vessel with sufficient speed and force, affecting the contrast effect.

[0105] In some embodiments, after the step S300 of turning off the infusion of physiological saline and starting the angiography operation, the following steps are further included:

[0106] S323. Detect bubbles in the contrast agent.

[0107] S324: If bubbles exist in the contrast medium, determine that the bubble situation of the contrast medium is abnormal.

[0108] Specifically, bubbles in contrast media are detected by bubble sensors. Bubbles in contrast media are detected by bubble sensors. Detection of contrast media bubbles enables medical staff to take measures before bubbles enter the patient's body, such as suspending injection of contrast media, removing bubbles, etc. This helps optimize medical operation processes, reduce the number of infusion interruptions caused by bubble problems, and improve medical efficiency.

[0109] In some embodiments, the step S300 of turning off the infusion of physiological saline and starting the angiography operation further includes:

[0110] S330: Issue an instruction to stop the infusion of physiological saline.

[0111] S340: Receive an instruction to stop the dripping of physiological saline, and stop the dripping of physiological saline.

[0112] When receiving the command to stop saline dripping, the saline control unit will respond quickly and stop the saline dripping. This command is usually automatically issued by the main control board when the imaging operation is about to begin and certain conditions are met (such as the contrast agent is ready, the patient's condition is stable and meets the imaging requirements, etc.). The switching process between the saline dripping state and the contrast agent injection state does not require manual operation, but is completed according to pre-set procedures and automated signal transmission, ensuring the timeliness and accuracy of the transition from saline dripping to contrast agent injection state.

[0113] In some embodiments, after the step S300 of closing the dripping of the physiological saline and starting the angiography operation, the following steps are further included:

[0114] S400: Determine whether the imaging operation is completed.

[0115] S500: If the angiography operation is completed, determine whether it is necessary to drip physiological saline.

[0116] S600: If normal saline drip is required, then the normal saline drip is performed.

[0117] S700: If the infusion of the physiological saline is not required, the infusion of the physiological saline is stopped.

[0118] Specifically, before the step S500 of determining whether to drip physiological saline after the angiography operation is completed, the following steps are further included:

[0119] S510: Determine whether the imaging operation is completed.

[0120] S520: If not, continue to inject contrast agent.

[0121] It should be noted that during the angiography operation, the imaging device will generate angiography images in real time, and determine whether the angiography is completed by analyzing the clarity, contrast, and degree of development of the target structure. If the key parts of the angiography image (such as vascular lesions, organ contours, etc.) are clearly visible and meet the image quality standards required for clinical diagnosis, then the angiography operation can be determined to be completed. For example, in coronary angiography, when the branches of the coronary arteries at all levels are clearly developed and the stenosis or lesion site can be accurately determined, the angiography image quality requirements are met.

[0122] If there are other related examinations or treatments that need to be performed immediately after the angiography operation, and the examinations or treatments have specific requirements for the patient's body fluid status, then the decision on whether to drip normal saline will be made accordingly. For example, if an interventional surgery is to be performed immediately after the angiography, it may be necessary to maintain a certain vascular access and maintain a suitable fluid environment, then dripping normal saline can be considered. If the angiography operation is the last examination item, stop dripping normal saline.

[0123] When it is determined that the contrast medium operation is not completed, the contrast medium injection is continued. For example, if the image shows that the contrast medium is not sufficiently developed in a certain area, the contrast medium injection can be continued.

[0124] In some embodiments, after the above-mentioned step S500 of determining whether to drip physiological saline after the angiography operation is completed, the following steps are further performed:

[0125] If yes, the step of starting the dripping of physiological saline ( S100 ) is executed.

[0126] It should be noted that the saline control unit is set to automatically drip saline, and this setting item is in the on state. The saline control unit will automatically start the drip of saline, thereby switching from the contrast agent injection state back to the saline drip state. After the angiography operation is completed, the vascular access (such as an intravenous catheter or catheter) may be at risk of blockage due to factors such as residual contrast agent and aggregation of blood components. Starting saline drip can flush the vascular access in time, remove residual substances, and keep the access unobstructed for possible further treatment or monitoring.

[0127] After the contrast agent is completed, staying in the body for too long may have adverse effects on organs such as the kidneys. The infusion of an appropriate amount of normal saline can dilute the concentration of the contrast agent in the blood to a certain extent and promote its excretion through urine, thereby reducing the risk of contrast agent accumulation in the body. In addition, the patient may have a certain degree of fluid loss during the contrast agent operation, especially in some time-consuming or involving larger vascular areas. Infusion of normal saline can replenish this part of the lost fluid and maintain the patient's blood volume and electrolyte balance.

[0128] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cascade control method for physiological saline and contrast agent, characterized in that: The following steps are involved: Start a saline drip; Determine whether to start the imaging operation; If yes, then the infusion of the physiological saline is turned off and the angiography operation is started; If not, continue to drip the saline solution.

2. The cascade control method according to claim 1, characterized in that: After the step of closing the dripping of the physiological saline and starting the angiography operation, the method further includes: Determining whether the imaging operation is completed; If the angiography operation is completed, determining whether it is necessary to drip the physiological saline; If the physiological saline solution needs to be dripped, the physiological saline solution is dripped; If the infusion of the physiological saline is not required, the infusion of the physiological saline is stopped.

3. The cascade control method according to claim 1, characterized in that: The step of starting the infusion of physiological saline comprises: Obtaining the infusion parameters of the physiological saline; The infusion of the physiological saline is started according to the infusion parameters.

4. The cascade control method according to claim 1, characterized in that: Before the step of closing the dripping of the physiological saline and starting the angiography operation, the method further comprises: The injection parameters of the contrast agent are obtained.

5. The cascade control method according to claim 4, characterized in that: The injection parameters of the contrast agent include the injection speed of the contrast agent and the dosage of the contrast agent.

6. The cascade control method according to claim 1, characterized in that: Before the step of starting the dripping of physiological saline, the method further comprises: The pipeline for dripping the physiological saline is vented.

7. The cascade control method according to claim 1, characterized in that: After the step of starting the dripping of physiological saline, the method further comprises: Detecting the pressure of the physiological saline drip and / or detecting bubbles in the physiological saline; When the pressure of the physiological saline drip is detected to be abnormal, and / or bubbles are detected to be present in the physiological saline; It is determined that the instillation of physiological saline is abnormal.

8. The cascade control method according to claim 1, characterized in that: After the step of starting the injection of the contrast agent, the method further comprises: detecting the pressure of the contrast agent injection, and / or detecting bubbles in the contrast agent; When an abnormal pressure of the contrast medium injection is detected, and / or bubbles are detected in the contrast medium; It is determined that the injection of the contrast agent is abnormal.

9. An infusion device for physiological saline and contrast agent, the infusion device executing the cascade control method according to any one of claims 1 to 8, characterized in that: It comprises a physiological saline control unit, a contrast agent control unit and a main control board, wherein the main control board is connected to the physiological saline control unit and the contrast agent control unit respectively, the main control board is used to send a first instruction to the physiological saline control unit, the physiological saline control unit is used to receive the first instruction, and control the dripping of the physiological saline based on the first instruction; The main control board is further used to send a second instruction to the contrast agent control unit, and the contrast agent control unit is used to receive the second instruction and control the injection of the contrast agent based on the second instruction.

10. The infusion device of physiological saline and contrast agent according to claim 9, characterized in that: The physiological saline control unit includes a first motor chip and a first motor, wherein the first motor chip is used to receive the first instruction of the physiological saline drip parameter sent by the main control board and drive the first motor to move, so as to control the physiological saline to drip according to the physiological saline drip parameter; The contrast agent control unit includes a second motor chip and a second motor. The second motor chip is used to receive the second instruction of the contrast agent injection parameter sent by the main control board and drive the second motor to move, so as to control the contrast agent to be injected according to the contrast agent injection parameter.

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