Automatic ultrasonic contrast agent injection device

Abstract

The invention relates to the technical field of medical instruments, in particular to an automatic ultrasonic contrast agent injection device which comprises an injector, a controller, a position monitoring device, a pressure monitoring device and a driving device. A needle cylinder body of the injector is used for storing a contrast agent, a needle cylinder handle can slide, the controller is connected with the sensors and collects, analyzes and processes signals for operation, the position monitoring device monitors the position of the needle cylinder handle and calculates the injection dosage and speed, and the pressure monitoring device monitors the pressure change and the standard reaching condition. A driving motor of the driving device is electrically connected with the controller, drives a screw rod to rotate and is connected with a needle cylinder handle, the controller judges the running state of the driving device according to pressure monitoring data and re-determines the running state, pressure data are repeatedly obtained in the re-determination process, and an abnormity judgment mode is determined according to the first-time monitoring data; therefore, the accuracy and the safety of injection are ensured, and the automation level and the reliability of ultrasonic contrast agent injection are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an automated ultrasound contrast agent injection device. Background Art

[0002] Existing ultrasound contrast agent push injection devices are mostly manual or semi-automatic, which are complicated to operate, with unstable push speed, and difficulty in accurately controlling the injection speed and dosage, which can easily cause discomfort and medical risks to patients. The control of the push speed has an important impact on the distribution of the contrast agent in the body and the imaging effect. If the push speed is too fast, the contrast agent may accumulate locally, affecting the accuracy of the image; if the push speed is too slow, the contrast agent may not reach the target site in time, which will also affect the examination results. In order to improve the efficiency and accuracy of ultrasound contrast examination, an ultrasound contrast agent push injection device with a high degree of automation, simple operation, and stable push is needed.

[0003] Chinese patent announcement number: CN108853635B discloses an automatic contrast injection device, which connects a first syringe, a second syringe and an infusion needle through a medical three-way connection and adjusts their passage mode, and controls a first linear motor guide slide and a second linear motor guide slide through a control device to drive the first syringe and the second syringe to push air and saline to each other, thereby forming contrast bubbles of uniform size and smoothly injecting them into the human body, thereby realizing its automation.

[0004] It can be seen that the automatic angiographic injection device still has the problem of difficulty in simultaneously taking into account the precise control of the injection speed and pressure, which may lead to poor injection effect and inability to balance the injection speed and pressure in actual application. Summary of the invention

[0005] To this end, the present invention provides an automated ultrasound contrast agent injection device to overcome the problem in the prior art that it is difficult to simultaneously take into account the precise control of the injection speed and pressure, which may result in poor injection effects and adverse effects on patients in actual applications.

[0006] To achieve the above object, the present invention provides an automated ultrasound contrast agent injection device, comprising:

[0007] The syringe comprises a syringe body and a syringe handle, wherein the syringe body can store contrast agent, and the front end of the syringe handle is slidably arranged in the syringe;

[0008] A controller, connected to each sensor, is used to summarize and analyze the signals processed by the data processing unit and perform the next operation according to the analysis results;

[0009] A position monitoring device, which is connected to the controller and includes a position sensor and a displacement data processing unit;

[0010] A pressure monitoring device, which is connected to the controller and includes a pressure sensor and a pressure data processing unit;

[0011] A driving device, comprising a driving motor electrically connected to the controller and a screw driven to rotate by the driving motor, wherein the screw is connected to the syringe handle;

[0012] The controller determines the operating status of the drive device based on the data monitored by the pressure monitoring device, and redetermines the operating status of the drive device based on the determination result. During the redetermination process, the data monitored by the pressure monitoring device is repeatedly obtained, and the abnormal determination method for the repeatedly monitored data is determined by the first monitored data.

[0013] Furthermore, the position monitoring device is used to monitor the position of the syringe handle and calculate the injection dose and speed. When the push injection dose reaches a preset value, the push injection device will automatically stop the push injection or send a prompt signal.

[0014] Furthermore, the pressure monitoring device is used to monitor the pressure changes during the contrast agent injection process and determine whether the pressure reaches the standard.

[0015] Furthermore, the pressure monitoring device monitors the pressure during the movement of the syringe handle and transmits the monitoring result to the data processing unit. The data processing unit compares the monitored pressure value with the preset standard pressure value, and redetermines the rotation speed of the driving device according to the comparison result, or issues an alarm.

[0016] Furthermore, when it is determined that the pressure is normal, the injection is performed at a constant speed, and the position monitoring device monitors the position of the syringe handle in real time. When the syringe handle reaches the warning position, the control unit controls the drive device to enter the deceleration stage, and the controller outputs a control signal according to the preset deceleration stage parameters to start the deceleration stage.

[0017] Furthermore, the warning position is the position where the syringe handle is at 90% of the predetermined injection dose. When the syringe handle reaches the warning position, the pressure value monitored at this time is the warning position pressure value. The warning position pressure and 10% of the predetermined injection dose are combined to obtain the calculated deceleration time. The calculated deceleration time is compared with the lower critical time and the upper critical time, and the comparison result is transmitted to the control unit.

[0018] Furthermore, when the calculated speed reduction duration is greater than or equal to the lower critical duration and less than or equal to the upper critical duration, the calculated speed reduction duration is determined as the target speed reduction duration; when the calculated speed reduction duration is less than the lower critical duration, the lower critical duration is determined as the target speed reduction duration; when the calculated speed reduction duration is greater than the upper critical duration, the upper critical duration is determined as the target speed reduction duration.

[0019] Furthermore, the deceleration stage is set to two stages, a first deceleration stage and a second deceleration stage. The duration of the first deceleration stage is 0.7 times the target deceleration duration, the duration of the second deceleration stage is 0.3 times the target deceleration duration, and the sum of the duration of the first deceleration stage and the duration of the second deceleration stage is the target deceleration duration. In the first deceleration stage, a larger first deceleration slope is set to make the speed drop quickly; in the second deceleration stage, a smaller second deceleration slope is set to make the speed drop slowly; wherein, the first deceleration slope is greater than the second deceleration slope.

[0020] Furthermore, in the deceleration stage, the control unit determines the deceleration stage and adjusts the deceleration slope according to the determination result.

[0021] Furthermore, the driving device converts the rotational motion of the motor into linear motion to control the advancement or withdrawal of the syringe handle.

[0022] Compared with the prior art, the beneficial effect of the present invention is that the present invention integrates a temperature monitoring device, a position monitoring device and a pressure monitoring device, and can monitor the key parameters in the push injection process in real time. This real-time monitoring and feedback mechanism enables the system to automatically adjust the push injection speed and pressure according to the patient's physiological response and actual needs, thereby ensuring the stability and controllability of the push injection process and reducing medical risks, which is difficult to achieve in the existing technical level. At the same time, the drive device of the present invention can accurately convert the rotational motion of the motor into linear motion to achieve precise control of the syringe handle. This precise motion conversion mechanism not only improves the accuracy of push injection and reduces errors caused by improper operation, but also reduces the wear of mechanical parts, extends the service life of the equipment, and reduces maintenance costs.

[0023] Furthermore, the present invention is connected to each sensor through a controller to monitor and process data in real time to ensure the accuracy and stability of contrast agent injection. Compared with manual injection, the present invention can accurately control the injection speed and pressure through automated operation, effectively avoid dosage deviation, improve the accuracy of medical diagnosis, and reduce the risk of medical accidents. Through automated injection, medical staff can be freed from cumbersome manual operations and devote more energy to the diagnosis and treatment of patients, thereby improving the overall efficiency of medical work.

[0024] Furthermore, the present invention makes the contrast agent storage and injection process smoother through the sliding arrangement of the syringe barrel and the syringe handle, thereby reducing the waste of contrast agent and the risk of cross infection.

[0025] Furthermore, the present invention can adjust the push injection parameters in real time by summarizing and analyzing the sensor data through the controller to ensure the stability and accuracy of the push injection process. This design significantly improves the intelligence level of the equipment and represents a new trend in the development of medical equipment.

[0026] Furthermore, the present invention can monitor the position of the syringe in real time through the design of the position sensor and the displacement data processing unit, ensure the precise control of the injection depth and angle, and avoid medical problems caused by inaccurate injection position.

[0027] Furthermore, the introduction of the pressure sensor and the pressure data processing unit enables the present invention to monitor and adjust the push injection pressure in real time, thereby avoiding tissue damage or insufficient drug efficacy caused by excessive or insufficient pressure.

[0028] Furthermore, the present invention realizes precise driving of the syringe handle through the cooperation of the driving motor and the screw, thereby ensuring the stability and consistency of the injection process.

[0029] Furthermore, the present invention improves the accuracy of medical diagnosis while also improving the patient's treatment experience, reducing the risk of medical accidents, and has significant social and economic benefits. In addition, the design concept and technical solution of the present invention provide new ideas and directions for the development of future medical equipment.

[0030] Furthermore, when the syringe handle reaches the warning position, the control unit controls the drive device to enter the deceleration stage according to the preset parameters, and realizes a smooth transition of the rotation speed by setting different deceleration slopes, thereby ensuring the stability of the injection process. By setting the deceleration stage into two stages and determining the target deceleration duration based on the comparison result of the calculated deceleration duration and the critical duration, the present invention can flexibly adjust the deceleration duration to meet different injection requirements.

[0031] Furthermore, the present invention ensures the uniform distribution of contrast agent in the patient's body by real-time monitoring and adjustment of key parameters such as injection speed and pressure, thereby improving the accuracy and effectiveness of diagnosis and treatment and providing more reliable data support for clinical diagnosis.

[0032] Furthermore, the present invention effectively overcomes the problem in the prior art that it is difficult to simultaneously take into account the precise control of injection speed and pressure. By integrating the position monitoring device and the pressure monitoring device, the present invention can monitor the position of the syringe handle and the pressure changes during the injection process in real time, ensuring the accuracy and stability of the injection. This not only optimizes the injection effect of the contrast agent, but also significantly reduces the adverse effects on patients caused by improper injection, thereby improving medical safety.

[0033] Furthermore, the present invention realizes accurate calculation of injection dose and intelligent adjustment of injection speed through the automated control mechanism. The linkage between the position monitoring device and the driving device ensures that the injection speed can be adjusted according to real-time data during the injection process, avoiding the uneven injection phenomenon that may occur during the traditional manual injection process. This improvement is of great significance for improving the uniform distribution of contrast agents and image quality.

[0034] Furthermore, the pressure monitoring device of the present invention can determine in real time whether the pressure reaches the preset standard, and intelligently adjust the speed of the driving device according to the monitoring result. This function not only ensures the stability of the pressure during the injection process, but also can detect abnormal conditions in time and respond to them, thereby further ensuring the safety of the patient.

[0035] In addition, the present invention optimizes the control strategy of the push injection process by introducing the concepts of warning position and deceleration time. When the syringe handle reaches the warning position, the system can automatically enter the deceleration stage and adjust the deceleration time according to the calculation results to ensure the stability and controllability of the entire push injection process. This intelligent control strategy not only improves the accuracy of push injection, but also reduces the difficulty of operation and reduces the occurrence of human errors.

[0036] Finally, the present invention not only improves the push injection effect, but also takes into account the convenience of operation and humanized design. By dividing the target deceleration time into two stages and setting different deceleration slopes, a smooth transition of the push injection process is achieved, allowing the operator to control the push injection process more easily and improving work efficiency.

[0037] In summary, the automated ultrasound contrast agent injection device provided by the present invention aims to improve injection accuracy, optimize the injection process, ensure injection safety, intelligent control and adjustment, early warning mechanism and speed reduction control, flexible speed reduction time adjustment, etc., and has significant beneficial effects. It not only improves the performance of medical equipment, but also provides patients with a safer and more comfortable medical experience. It provides a new technical solution for the injection of ultrasound contrast agents, achieves the optimal balance between injection speed and injection pressure, and has broad application prospects and important clinical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the use status of the automated ultrasound contrast agent injection device of this embodiment;

[0039] Figure 2 This is a schematic diagram of the process flow of using the automated ultrasound contrast agent injection device of this embodiment;

[0040] Figure 3 This is a flow chart of the injection phase of the use process of the automated ultrasound contrast agent injection device of this embodiment;

[0041] Figure 4 This is a schematic diagram of the speed reduction phase of the use process of the automated ultrasound contrast agent injection device of this embodiment. DETAILED DESCRIPTION

[0042] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; 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.

[0043] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0044] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0045] In addition, it should be noted that in the description of the present invention, 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Please refer to Figure 1- Figure 4 As shown, Figure 1 This is a schematic diagram of the use status of the automated ultrasound contrast agent injection device of this embodiment; Figure 2 This is a schematic diagram of the process flow of using the automated ultrasound contrast agent injection device of this embodiment; Figure 3 This is a flow chart of the injection phase of the use process of the automated ultrasound contrast agent injection device of this embodiment; Figure 4 This is a schematic diagram of the speed reduction phase of the use process of the automated ultrasound contrast agent injection device of this embodiment.

[0047] The present invention provides an automated ultrasound contrast agent push injection device, comprising:

[0048] The syringe 1 comprises a syringe barrel 11 and a syringe handle 12. The syringe barrel 11 can store contrast agent, and the front end of the syringe handle 12 is slidably disposed in the syringe;

[0049] Controller 2, connected to each sensor, is used to summarize and analyze the signals processed by the data processing unit and perform the next operation according to the analysis results;

[0050] The position monitoring device 3 is connected to the controller 2 and includes a position sensor and a displacement data processing unit, and is used to monitor the position of the syringe handle 12 and calculate the injection dose and speed. When the injection dose reaches a preset value, the injection device will automatically stop the injection or send a prompt signal to ensure the accuracy and safety of the injection;

[0051] The pressure monitoring device 4 is connected to the controller 2 and includes a pressure sensor and a pressure data processing unit, and is used to monitor the pressure change during the contrast agent injection process and determine whether the pressure reaches the standard.

[0052] The driving device 5 includes a driving motor electrically connected to the controller 2 and a screw driven to rotate by the driving motor, wherein the screw is connected to the syringe handle 12;

[0053] The controller 2 determines the operating status of the driving device 5 based on the data monitored by the pressure monitoring device 4, and redetermines the operating status of the driving device 5 based on the determination result. In the process of redetermining, the data monitored by the pressure monitoring device 4 is repeatedly obtained, and the abnormal determination method for the repeatedly monitored data is determined by the first monitored data.

[0054] The present invention integrates a temperature monitoring device, a position monitoring device 3 and a pressure monitoring device 4, which can monitor the key parameters in the push injection process in real time. This real-time monitoring and feedback mechanism enables the system to automatically adjust the push injection speed and pressure according to the patient's physiological response and actual needs, thereby ensuring the stability and controllability of the push injection process and reducing medical risks, which is difficult to achieve in the existing technical level. At the same time, the drive device 5 of the present invention can accurately convert the rotational motion of the motor into linear motion to achieve precise control of the syringe handle 12. This precise motion conversion mechanism not only improves the accuracy of push injection and reduces errors caused by improper operation, but also reduces the wear of mechanical parts, extends the service life of the equipment, and reduces maintenance costs.

[0055] Specifically, the present invention is connected to each sensor through the controller 2, and real-time monitoring and processing of data ensures the accuracy and stability of contrast agent injection. Compared with manual injection, the present invention can accurately control the injection speed and pressure through automated operation, effectively avoid dosage deviation, improve the accuracy of medical diagnosis, and reduce the risk of medical accidents. Through automated injection, medical staff can be freed from cumbersome manual operations and devote more energy to the diagnosis and treatment of patients, thereby improving the overall efficiency of medical work.

[0056] In this embodiment, during the startup phase, the syringe containing the ultrasound contrast agent is connected to the connecting tube, the other end of the connecting tube is connected to the patient's intravenous indwelling needle, and the standard pressure value, injection speed, injection dosage, and injection duration are set on the controller 2. These parameters will serve as the control basis for the subsequent injection process;

[0057] During the push injection stage, the driving device 5 drives the syringe handle 12 to move at an initial rotation speed. The pressure monitoring device 4 monitors the pressure during the movement of the syringe handle 12 and transmits the monitoring result to the data processing unit. The data processing unit compares the monitored pressure value with the preset standard pressure value, and redetermines the rotation speed of the driving device 5 according to the comparison result, or issues an alarm.

[0058] The data processing unit calculates the absolute value of the difference between the monitored actual pressure value and the preset standard pressure value;

[0059] When the monitored actual pressure value is less than or equal to the standard pressure value, the data processing unit compares the absolute value of the difference with the first preset comparison value, and transmits the comparison result to the control unit.

[0060] If the absolute value of the difference is less than or equal to the first preset comparison value, the control unit determines that the pressure is normal and continues to drive the syringe handle 12 to move at the initial rotation speed;

[0061] If the absolute value of the difference is greater than the first preset comparison value, the control unit determines that the pressure is abnormal, controls the driving device 5 to stop rotating, and controls the alarm unit to sound an alarm.

[0062] When the monitored actual pressure value is greater than the standard pressure value, the data processing unit compares the absolute value of the difference with a second preset comparison value, and transmits the comparison result to the control unit.

[0063] If the absolute value of the difference is less than or equal to the second preset comparison value, the control unit determines that the pressure is normal and continues to drive the syringe handle 12 to move at the initial rotation speed;

[0064] If the absolute value of the difference is greater than the second preset comparison value, the control unit determines that the pressure is abnormal and adjusts the rotation speed of the driving device 5 for the first time.

[0065] The first preset contrast value and the second preset contrast value are internally set in the control unit.

[0066] The control unit adjusts the speed to a first adjustment speed, which is the sum of one-half of the absolute value of the difference and the initial speed value. After adjusting to the first adjustment speed, the pressure monitoring device 4 monitors the pressure it receives in real time and transmits it to the data processing unit. The data processing unit calculates the absolute value of the difference between the actual pressure value monitored at this time and the preset standard pressure value. The absolute value of the difference at this time is recorded as the first adjustment difference absolute value;

[0067] The absolute value of the first adjustment difference is compared with the preset adjustment comparison value, and the comparison result is transmitted to the control unit.

[0068] If the absolute value of the first adjustment difference is less than or equal to the preset adjustment comparison value, the control unit determines that the pressure is normal and continues to drive the syringe handle 12 to move at the first adjustment speed;

[0069] If the absolute value of the first adjustment difference is greater than the preset adjustment comparison value, the control unit determines that the pressure is abnormal and performs a second adjustment on the rotation speed of the driving device 5:

[0070] The control unit adjusts the speed to a second adjustment speed, the second adjustment speed being the sum of one-half of the absolute value of the first adjustment difference and the first adjustment speed value. After adjusting to the second adjustment speed, the data processing unit calculates the absolute value of the difference between the actual pressure value monitored at this time and the preset standard pressure value, and the absolute value of the difference at this time is recorded as the second adjustment difference absolute value;

[0071] The absolute value of the second adjustment difference is compared with the adjustment preset comparison value, and the comparison result is transmitted to the control unit.

[0072] If the absolute value of the second adjustment difference is less than or equal to the preset adjustment comparison value, the control unit determines that the pressure is normal and continues to drive the syringe handle 12 to move at the second adjustment speed;

[0073] If the absolute value of the second adjustment difference is greater than the preset adjustment comparison value, the control unit determines that the pressure is abnormal, controls the driving device 5 to stop rotating, and controls the alarm unit to sound an alarm.

[0074] The value of the adjusted preset contrast value is determined by the initial absolute value of the difference. The larger the initial absolute value of the difference is, the larger the value of the adjusted preset contrast value is, and the value of the adjusted preset contrast value is greater than the second preset contrast value.

[0075] In this embodiment, the value of the preset contrast value is the product of the initial absolute value of the difference and the contrast value adjustment coefficient plus the value of the second preset contrast value;

[0076] The contrast value adjustment coefficient is set to 0.05.

[0077] Specifically, the present invention makes the contrast agent storage and injection process smoother through the sliding arrangement of the syringe barrel 11 and the syringe handle 12, reduces the waste of contrast agent, and also reduces the risk of cross infection.

[0078] Specifically, the present invention collects and analyzes the sensor data through the controller 2, and can adjust the push injection parameters in real time to ensure the stability and accuracy of the push injection process. This design significantly improves the intelligence level of the equipment and represents a new trend in the development of medical equipment.

[0079] Specifically, the present invention can monitor the position of the syringe in real time through the design of the position sensor and the displacement data processing unit, ensure the precise control of the injection depth and angle, and avoid medical problems caused by inaccurate injection position.

[0080] Specifically, the introduction of the pressure sensor and the pressure data processing unit enables the present invention to monitor and adjust the push pressure in real time, avoiding tissue damage or insufficient drug efficacy caused by excessive or insufficient pressure. In particular, the pressure monitoring device 4 can determine in real time whether the pressure reaches the preset standard, and intelligently adjust the speed of the driving device 5 according to the monitoring result. This function not only ensures the stability of the pressure during the push injection process, but also can detect and respond to abnormal conditions in a timely manner, thereby further ensuring the safety of the patient.

[0081] Specifically, the present invention realizes precise driving of the syringe handle 12 through the cooperation of the driving motor and the screw, thereby ensuring the stability and consistency of the injection process.

[0082] Specifically, the present invention improves the accuracy of medical diagnosis while also improving the patient's treatment experience, reducing the risk of medical accidents, and has significant social and economic benefits. In addition, the design concept and technical solution of the present invention provide new ideas and directions for the development of future medical equipment.

[0083] Specifically, when the syringe handle 12 reaches the warning position, the control unit controls the drive device 5 to enter the deceleration stage according to the preset parameters, and realizes a smooth transition of the rotation speed by setting different deceleration slopes, thereby ensuring the stability of the injection process. By setting the deceleration stage into two stages and determining the target deceleration duration based on the comparison result of the calculated deceleration duration and the critical duration, the present invention can flexibly adjust the deceleration duration to adapt to different injection requirements.

[0084] In this embodiment, when it is determined that the pressure is normal, the injection is performed at a constant speed, and the position monitoring device 3 monitors the position of the syringe handle 12 in real time. When the syringe handle 12 reaches the warning position, the control unit controls the drive device 5 to enter the deceleration stage. The warning position is the position where the syringe handle 12 is at 90% of the predetermined injection dose.

[0085] When the syringe handle 12 reaches the warning position, the pressure value monitored at this time is the warning position pressure value, and the corresponding deceleration time is the standard deceleration time. The warning position pressure and 10% of the predetermined injection dose are combined to obtain the calculated deceleration time, and the calculated deceleration time is compared with the lower critical time and the upper critical time to determine the target deceleration time, and the target deceleration time is transmitted to the control unit.

[0086] When the calculated speed reduction duration is greater than or equal to the lower critical duration and less than or equal to the upper critical duration, the calculated speed reduction duration is determined as the target speed reduction duration;

[0087] When the calculated deceleration duration is less than the lower critical duration, the lower critical duration is determined as the target deceleration duration;

[0088] When the calculated deceleration duration is greater than the upper critical duration, the upper critical duration is determined as the target deceleration duration.

[0089] The speed reduction stage is set to two stages: the first speed reduction stage and the second speed reduction stage. The first speed reduction stage is 0.7 times the target speed reduction duration, and the second speed reduction stage is 0.3 times the target speed reduction duration. The sum of the first speed reduction stage and the second speed reduction stage is the target speed reduction duration.

[0090] In the first deceleration stage, a larger first deceleration slope is set to rapidly reduce the rotation speed;

[0091] In the second deceleration stage, a smaller second deceleration slope is set to slowly reduce the rotation speed;

[0092] Among them, the first deceleration slope is greater than the second deceleration slope, the control unit determines the deceleration stage and adjusts the deceleration slope according to the determination result.

[0093] Specifically, when the syringe handle 12 reaches the warning position, the control unit controls the drive device 5 to enter the deceleration stage according to the preset parameters, and realizes a smooth transition of the rotation speed by setting different deceleration slopes, thereby ensuring the stability of the injection process. By setting the deceleration stage into two stages and determining the target deceleration duration based on the comparison result of the calculated deceleration duration and the critical duration, the present invention can flexibly adjust the deceleration duration to meet different injection requirements.

[0094] In this embodiment, the target deceleration time is set to 10 seconds, then the first deceleration stage is the 0-7th second, and the second deceleration stage is the 7th-10th second. In the first deceleration stage, the first data point (50 mmHg, 1 second) and the second data point (15 mmHg, 6 seconds) are known, then the first deceleration slope is the absolute value of the ratio of the pressure difference between the first data point and the second data point to the time difference between the first data point and the second data point, which is 7; in the second deceleration stage, the third data point (10 mmHg, 8 seconds) and the fourth data point (5 mmHg, 9 seconds) are known, then the second deceleration slope is the absolute value of the ratio of the pressure difference between the third data point and the fourth data point to the time difference between the third data point and the fourth data point, which is 5. The first deceleration slope 7 is greater than the second deceleration slope 5. When the target deceleration time is at the 8th second, the control unit determines that it is currently in the second deceleration stage, and controls the speed according to the second deceleration slope.

[0095] The speed is reduced at a constant second speed reduction slope until the motor speed and pressure both drop to zero. The second speed reduction stage ends, the speed reduction is completed, and the injection process is completed.

[0096] The present invention effectively overcomes the problem in the prior art that it is difficult to simultaneously take into account the precise control of injection speed and pressure. By integrating the position monitoring device 3 and the pressure monitoring device 4, the present invention can monitor the position of the syringe handle 12 and the pressure change during the injection process in real time, ensuring the accuracy and stability of the injection. This not only optimizes the injection effect of the contrast agent, but also significantly reduces the adverse effects on patients caused by improper injection, thereby improving medical safety.

[0097] The present invention realizes accurate calculation of injection dose and intelligent adjustment of injection speed through the automatic control mechanism. The linkage between the position monitoring device 3 and the driving device 5 ensures that the injection speed can be adjusted according to real-time data during the injection process, avoiding the uneven injection phenomenon that may occur in the traditional manual injection process. This improvement is of great significance for improving the uniform distribution of contrast agent and image quality.

[0098] Specifically, the pressure monitoring device 4 of the present invention can determine in real time whether the pressure reaches the preset standard, and intelligently adjust the speed of the driving device 5 according to the monitoring result. This function not only ensures the stability of the pressure during the injection process, but also can detect abnormal conditions in time and respond, thereby further ensuring the safety of the patient.

[0099] At the same time, the present invention optimizes the control strategy of the push injection process by introducing the concepts of warning position and deceleration time. When the syringe handle 12 reaches the warning position, the system can automatically enter the deceleration stage and adjust the deceleration time according to the calculation results to ensure the stability and controllability of the entire push injection process. This intelligent control strategy not only improves the accuracy of push injection, but also reduces the difficulty of operation and reduces the occurrence of human errors.

[0100] The present invention not only improves the push injection effect, but also takes into account the convenience of operation and humanized design. By dividing the deceleration stage into two stages and setting different deceleration slopes, a smooth transition of the deceleration process is achieved, so that the operator can control the push injection process more easily and improve work efficiency.

[0101] Specifically, the present invention effectively overcomes the problem in the prior art that it is difficult to simultaneously take into account the precise control of injection speed and pressure. By integrating the position monitoring device 3 and the pressure monitoring device 4, the present invention can monitor the position of the syringe handle 12 and the pressure changes during the injection process in real time, ensuring the accuracy and stability of the injection. This not only optimizes the injection effect of the contrast agent, but also significantly reduces the adverse effects on patients caused by improper injection, thereby improving medical safety.

[0102] Specifically, the present invention realizes accurate calculation of injection dose and intelligent adjustment of injection speed through an automated control mechanism. The linkage between the position monitoring device 3 and the driving device 5 ensures that the injection speed can be adjusted according to real-time data during the injection process, avoiding the uneven injection phenomenon that may occur during the traditional manual injection process. This improvement is of great significance for improving the uniform distribution of contrast agents and image quality.

[0103] In summary, the automated ultrasound contrast agent injection device provided by the present invention aims to improve injection accuracy, optimize the injection process, ensure injection safety, intelligent control and adjustment, early warning mechanism and speed reduction control, flexible speed reduction time adjustment, etc., and has significant beneficial effects. It not only improves the performance of medical equipment, but also provides patients with a safer and more comfortable medical experience. It provides a new technical solution for the injection of ultrasound contrast agents, achieves the optimal balance between injection speed and injection pressure, and has broad application prospects and important clinical value.

[0104] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automated ultrasound contrast agent injection device, characterized in that: include, The syringe comprises a syringe body and a syringe handle, wherein the syringe body can store contrast agent, and the front end of the syringe handle is slidably arranged in the syringe; A controller, connected to each sensor, is used to summarize and analyze the signals processed by the data processing unit and perform the next operation according to the analysis results; A position monitoring device, which is connected to the controller and includes a position sensor and a displacement data processing unit; A pressure monitoring device, which is connected to the controller and includes a pressure sensor and a pressure data processing unit; A driving device, comprising a driving motor electrically connected to the controller and a screw driven to rotate by the driving motor, wherein the screw is connected to the syringe handle; The controller determines the operating status of the drive device based on the data monitored by the pressure monitoring device, and redetermines the operating status of the drive device based on the determination result. During the redetermination process, the data monitored by the pressure monitoring device is repeatedly obtained, and the abnormal determination method for the repeatedly monitored data is determined by the first monitored data.

2. The automated ultrasound contrast agent injection device according to claim 1, characterized in that: The position monitoring device is used to monitor the position of the syringe handle and calculate the injection dose and speed. When the injection dose reaches a preset value, the injection device will automatically stop the injection or send out a prompt signal.

3. The automated ultrasound contrast agent injection device according to claim 2, characterized in that: The pressure monitoring device is used to monitor the pressure changes during the contrast agent injection process and determine whether the pressure reaches the standard.

4. The automated ultrasound contrast agent injection device according to claim 3, characterized in that: The pressure monitoring device monitors the pressure during the movement of the syringe handle and transmits the monitoring result to the data processing unit. The data processing unit compares the monitored pressure value with the preset standard pressure value, and redetermines the rotation speed of the drive device according to the comparison result, or issues an alarm.

5. The automated ultrasound contrast agent injection device according to claim 4, characterized in that: When the pressure is determined to be normal, the injection is performed at a constant speed. The position monitoring device monitors the position of the syringe handle in real time. When the syringe handle reaches the warning position, the control unit controls the drive device to enter the deceleration stage. The controller outputs a control signal according to the preset deceleration stage parameters to start the deceleration stage.

6. The automated ultrasound contrast agent injection device according to claim 5, characterized in that: The warning position is the position where the syringe handle is at 90% of the predetermined injection dose. When the syringe handle reaches the warning position, the pressure value monitored at this time is the warning position pressure value. The warning position pressure and 10% of the predetermined injection dose are combined to obtain the calculated deceleration time. The calculated deceleration time is compared with the lower critical time and the upper critical time, and the comparison result is transmitted to the control unit.

7. The automated ultrasound contrast agent injection device according to claim 6, characterized in that: When the calculated speed reduction duration is greater than or equal to the lower critical duration and less than or equal to the upper critical duration, the calculated speed reduction duration is determined as the target speed reduction duration; When the calculated deceleration duration is less than the lower critical duration, the lower critical duration is determined as the target deceleration duration; When the calculated deceleration duration is greater than the upper critical duration, the upper critical duration is determined as the target deceleration duration.

8. The automated ultrasound contrast agent injection device according to claim 7, characterized in that: The deceleration stage is set to two stages: the first deceleration stage and the second deceleration stage. The duration of the first deceleration stage is 0.7 times the target deceleration duration, and the duration of the second deceleration stage is 0.3 times the target deceleration duration. The sum of the duration of the first deceleration stage and the duration of the second deceleration stage is the target deceleration duration. In the first deceleration stage, a larger first deceleration slope is set to make the speed drop quickly. In the second deceleration stage, a smaller second deceleration slope is set to make the speed drop slowly. Among them, the first deceleration slope is greater than the second deceleration slope.

9. The automated ultrasound contrast agent injection device according to claim 8, characterized in that: In the deceleration stage, the control unit determines the deceleration stage and adjusts the deceleration slope according to the determination result.

10. The automated ultrasound contrast agent injection device according to claim 1, characterized in that: The driving device converts the rotational motion of the motor into linear motion to control the advancement or withdrawal of the syringe handle.

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