CN110575584A - High-safety contrast agent injection system - Google Patents

Abstract

The application relates to a high-safety contrast agent injection system which comprises a contrast injection unit, a microprocessor unit, a safety protection unit, a self-diagnosis unit, a control unit, an alarm prompting unit, a control and display unit, a power supply unit, a medical three-way switching device and a saline peristaltic unit. The system improves the reliability of contrast agent injection. The self-diagnosis unit is arranged to diagnose the signals sent by the key unit, so that faults can be found in time and alarm prompt can be given in the working process, and unnecessary influence on the treatment process due to system problems is avoided.

Description

High-safety contrast agent injection system

Technical Field

The invention belongs to the field of medical instruments, and particularly relates to a high-safety contrast agent injection system.

Background

The Digital Subtraction Angiography (DSA) is a new X-ray imaging system, which is the product of the combination of conventional angiography and electronic computer image processing. The basic principle of DSA is to input two frames of X-ray images taken before and after the injection of contrast agent into an image computer through digitalization, obtain clear pure blood vessel images through subtraction, enhancement and re-imaging processes, and simultaneously display the blood vessel images in real time.

Contrast media injections currently generally employ automatic injection devices. However, the existing automatic contrast medium injection device has some technical disadvantages. Firstly, get rid of the bubble operation complicacy, need medical personnel to monitor frequently, reduced work efficiency. For example: some current devices need to vent the syringe upwards in the aspect of removing bubbles, and this can only rely on medical personnel to inspect before the injection and adjust the inclination of injection head and avoid the bubble to squeeze into in the human body, has the potential safety hazard. Still other devices require the medical personnel to manually tap the infusion line to vent the air. Secondly, the injection rate can not be changed in the injection process, and the smoking operation can not be met. In view of clinical experience, a small bolus of contrast media (commonly referred to as "smoke") is required to determine the tip position of the catheter when coronary imaging is performed. The prior device has no operation setting value or has complex operation, and the injection amount and the injection speed are not easy to control. Thirdly, some existing contrast media injection systems are prone to generate bubbles when saline and contrast media are switched. The existing automatic contrast medium injection device basically adopts an electric control technology, and when a circuit and electrical equipment have faults and overspeed injection is generated, the existing device generally does not have a self-diagnosis module for judging the faults and setting a safety device for quickly cutting off the output of the contrast medium, so that the existing automatic contrast medium injection device has great potential safety hazards.

Disclosure of Invention

In order to solve the problems in the prior art, it is an object of the present invention to provide a high-safety contrast agent injection system for injection of an angiographic contrast agent.

The purpose of the invention is realized by the following technical scheme:

A high-safety contrast medium injection system comprises a contrast injection unit, a microprocessor unit, a safety protection unit, a self-diagnosis unit, a control unit, an alarm prompting unit, a control and display unit, a power supply unit, a medical three-way switching device and a saline peristaltic unit, wherein the contrast injection unit is electrically connected with the microprocessor unit, the self-diagnosis unit and the safety protection unit respectively; the microprocessor unit is electrically connected with the saline peristaltic unit, the control and display unit, the self-diagnosis unit, the radiography injection unit, the medical three-way switching unit, the safety protection unit, the alarm prompting unit and the control unit; the safety protection unit is electrically connected with the self-diagnosis unit, the microprocessor unit, the radiography injection unit and the alarm prompting unit; the self-diagnosis unit is electrically connected with the microprocessor unit, the radiography injection unit, the control and display unit, the control unit and the safety protection unit; the control unit is electrically connected with the self-diagnosis unit and the microprocessor unit respectively; the alarm prompting unit is electrically connected with the microprocessor unit and the safety protection unit respectively; the medical three-way switching device is respectively communicated with the radiography injection unit and the saline peristaltic unit through pipelines in a fluid mode, and the medical three-way switching device and the saline peristaltic unit are electrically connected with the microprocessor unit; the power supply unit supplies power to the high-safety contrast agent injection system.

The purpose of the invention can be further realized by the following technical scheme:

In one embodiment, the self-diagnosis unit includes an imaging injection unit diagnosis module, a control unit diagnosis module, a display control unit diagnosis module, and a safety protection unit diagnosis module, where the imaging injection unit diagnosis module, the control unit diagnosis module, the display control unit diagnosis module, and the safety protection unit diagnosis module respectively determine signals from the imaging injection unit, the control unit, the display control unit, and the safety protection unit, determine and identify a fault signal, send fault information to the microprocessor unit, and output corresponding fault information through the display control unit and the alarm prompting unit connected to the microprocessor unit.

In a preferred embodiment, the contrast injection unit diagnosis module is configured to determine a working state of the contrast injection unit, set a fault mode according to a specific failure mode of the contrast injection unit, establish a self-diagnosis mode between the contrast injection unit and the self-diagnosis unit, automatically identify the fault mode if the contrast injection unit fails, send a fault signal to the microprocessor unit, and output fault information of the contrast injection unit through the control display unit and the alarm prompting unit.

In a preferred embodiment, the operation and control unit diagnosis module is configured to determine a working state of the operation and control unit, set a fault mode according to a specific failure mode of the operation and control unit, establish a self-diagnosis mode between the operation and control unit and the self-diagnosis unit, automatically identify the fault mode if the operation and control unit fails, send a fault signal to the microprocessor unit, and output fault information of the operation and control unit through the control and display unit and the alarm prompting unit.

In a preferred embodiment, the control and display unit diagnosis module is configured to determine a working state of the control and display unit, set a fault mode according to a specific failure mode of the control and display unit, establish a self-diagnosis mode with the self-diagnosis unit, automatically identify the fault mode if the control and display unit fails, send a fault signal to the microprocessor unit, and output fault information of the control and display unit through the alarm prompting unit.

In a preferred embodiment, the safety protection unit diagnosis module is configured to determine a working state of the safety protection unit, set a fault mode according to a specific failure mode of the safety protection unit, establish a self-diagnosis mode between the safety protection unit and the self-diagnosis unit, automatically identify the fault mode if the safety protection unit fails, send a fault signal to the microprocessor unit, and output fault information of the safety protection unit through the control and display unit and the alarm prompting unit.

In one embodiment, the contrast injection unit comprises a driving and controlling module, a servo electric cylinder, a pressure sensor, a contrast agent bubble sensor, a contrast agent injection barrel, an injection stroke limit switch, a medical three-way switching device and an absolute value encoder.

In a preferred embodiment, one end of the driving module is electrically connected with the microprocessor unit and receives a driving control signal from the microprocessor unit, and the other end of the driving module is electrically connected with the servo electric cylinder and controls the servo electric cylinder according to the driving control signal from the microprocessor unit; the servo electric cylinder is connected with the contrast agent injection barrel, the contrast agent injection barrel is communicated with the medical three-way switching device through a pipeline, the contrast agent bubble sensor is arranged on the pipeline between the contrast agent injection barrel and the medical three-way switching device, the pressure sensor is arranged inside the servo electric cylinder and is electrically connected with the microprocessor unit, the safety protection unit and the self-diagnosis unit, the injection stroke limit switch is arranged outside the servo electric cylinder and is electrically connected with the microprocessor unit, the absolute value encoder is arranged on the servo electric cylinder, and the absolute value encoder is electrically connected with the microprocessor unit, the self-diagnosis unit and the safety protection unit.

In a preferred embodiment, one end of the medical three-way switching device is communicated with the contrast agent bottle through a pipeline, the other end of the medical three-way switching device is communicated with the contrast agent injection barrel, and the contrast agent injection barrel is communicated with the contrast agent injection tube through a safety valve so as to inject the contrast agent outwards.

In a preferred embodiment, the tubing and the contrast media syringe are high pressure hoses.

In a preferred embodiment, the servo cylinder is connected to the contrast injection barrel via a plunger rod.

In a preferred embodiment, the injection stroke limit switches are provided at both front and rear ends of the outside of the servo cylinder, and the absolute value encoder is installed at the rear end of the servo cylinder.

In one embodiment, the safety protection unit comprises a protection logic judgment module and a drive protection switch module.

In one embodiment, the microprocessor unit includes a microprocessor and a memory.

In a preferred embodiment, the microprocessor is electrically connected with the drive control module in the contrast injection unit and sends drive control information to the drive control module; the microprocessor is electrically connected with the contrast agent bubble sensor and receives a bubble state signal from the contrast agent bubble sensor; the microprocessor is electrically connected with the injection travel limit switch and receives a limit signal from the injection travel limit switch; the microprocessor is electrically connected with the medical three-way switching device and sends a position switching signal to the medical three-way switching device; the microprocessor is electrically connected with the absolute value encoder and is used for receiving the displacement and displacement speed information of the servo electric cylinder measured by the absolute value encoder; the microprocessor unit is electrically connected with the contrast injection unit diagnosis module in the self-diagnosis unit and receives information from the contrast injection unit diagnosis module; the microprocessor is electrically connected with the control unit diagnosis module and receives information from the control unit diagnosis module; the microprocessor is electrically connected with the control display unit diagnosis module, receives parameter setting information and control instruction information from the control display unit, and sends display information to the control display unit; the microprocessor is electrically connected with the safety protection unit diagnosis module, receives information from the safety protection unit diagnosis module and sends a failure signal of the microprocessor to the safety protection unit; the microprocessor is electrically connected with the contrast agent operating handle in the control unit and receives control information from the contrast agent operating handle, and is electrically connected with the saline operating handle and receives control information from the saline operating handle; the microprocessor is electrically connected with the medical three-way switching device and sends position switching information to the medical three-way switching device; the microprocessor is electrically connected with the saline water peristaltic unit, sends peristaltic control information to the saline water peristaltic unit and receives a bubble state signal monitored by a saline water bubble sensor in the saline water peristaltic unit; the microprocessor is electrically connected with the alarm prompting unit and sends related alarm prompting information to the alarm prompting unit; the microprocessor is electrically linked with the data storage module, and relevant data are stored in the data storage module.

In a preferred embodiment, the protection logic judgment module is electrically connected with the pressure sensor in the contrast injection unit, receives a pressure value generated when the pressure sensor measures the operation of the servo electric cylinder, and judges whether overpressure (injection overpressure) exists; the protection logic judgment module is electrically connected with the absolute value encoder, receives displacement speed (contrast agent injection speed) information generated when the servo electric cylinder runs and measured by the absolute value encoder, and judges whether overspeed (injection overspeed) occurs; the protection logic judgment module is electrically connected with a microprocessor in the microprocessor unit, receives a signal from the microprocessor and judges whether the microprocessor fails; the protection logic judgment module carries out one-out-of-three logic judgment on the received information, the protection logic judgment module is electrically connected with the drive protection switch, when the protection logic judgment module judges that any one of conditions of an injection overpressure value, injection overspeed information and microprocessor failure occurs, the protection logic judgment module outputs a safety protection signal to the drive protection switch module, the drive protection switch module cuts off a power supply of the drive control module in the contrast agent injection unit, meanwhile, the protection logic judgment module outputs alarm information to the alarm prompting unit, and the protection logic judgment module is electrically connected with the safety protection unit diagnosis module in the self-diagnosis unit and sends diagnosis information to the safety protection unit diagnosis module.

In one embodiment, the high-safety contrast media injector system further comprises a bubble sensor unit disposed at an end of the medical three-way automatic switching device connected to the patient.

In a preferred embodiment, the bubble sensor unit is a redundant structure formed by combining two bubble sensors, both of which are electrically connected to the microprocessor unit for monitoring the state of bubbles in a contrast agent tube leading to a human body, and sending a signal to the microprocessor unit once any one of the bubble sensors detects bubbles.

In one embodiment, the high-safety contrast media injection system further comprises a manual protection switch electrically connected to the safety protection unit, and an operator sends a safety protection signal to the safety protection unit by activating the manual protection switch.

In one embodiment, the medical tee joint switching device comprises an intelligent motor, a fixed base, a coupler and a fixed sheet, wherein the intelligent motor is connected with the coupler and drives the coupler to act, the medical tee joint is installed on the coupler and acts together with the coupler, and the fixed sheet fixes the medical tee joint on the fixed base. The medical three-way switching device is used for installing and fixing a medical three-way valve and a rotary medical three-way valve and switching a contrast agent injection loop and a saline injection loop.

In a preferred embodiment, the intelligent motor is electrically connected with the microprocessor unit, receives a position switching signal from the microprocessor unit, and performs corresponding position switching according to the position switching signal of the microprocessor unit.

In one embodiment, the contrast injection unit is in fluid communication with the medical three-way switching device through a contrast injection tube, a safety valve is arranged on the contrast injection tube, the safety valve comprises a speed-limiting valve and a pressure-limiting valve, when the injection flow rate of the contrast agent exceeds a dangerous flow rate value, the speed-limiting valve is started to close the contrast injection circuit to prevent the high-speed contrast agent from flowing into a human body, and when the speed-limiting valve is closed and the pressure in the safety valve reaches the pressure-limiting value, the pressure-limiting valve is opened to perform pressure relief to protect the contrast injection circuit.

In one embodiment, the saline peristaltic unit comprises a peristaltic pump and a saline bubble sensor, the peristaltic pump is installed on a saline hose communicating the saline bag and the medical three-way switching device, the peristaltic pump is electrically connected with a microprocessor in the microprocessor unit and receives a control signal of the microprocessor, the saline bubble sensor is installed on the saline hose connected below the saline bag, and the saline bubble sensor is electrically connected with the microprocessor and sends a saline pipeline bubble state signal to the microprocessor.

In one embodiment, the control and display unit comprises a touch screen, the touch screen is electrically connected with the microprocessor in the microprocessor unit, receives and displays relevant information from the microprocessor, and sends control instruction information to the microprocessor.

In one embodiment, the manipulation unit includes a contrast media manipulation handle and a saline manipulation handle.

In a preferred embodiment, the contrast operating handle and the saline operating handle are electrically connected to the microprocessor in the microprocessor unit, and transmit the operation information of the contrast operating handle and the saline operating handle to the microprocessor, and the contrast operating handle is electrically connected to the operation unit diagnosis module in the self-diagnosis unit, and transmit the diagnosis information to the operation unit diagnosis module.

In one embodiment, the alarm prompting unit comprises a buzzer and an indicator light. The buzzer and the indicator light are electrically connected with the microprocessor in the microprocessor unit, receive corresponding information from the microprocessor unit, give a buzzing prompt through the buzzer, and give a light prompt through the indicator light.

compared with the prior art, the invention has the advantages that:

1. The high-safety contrast agent injection system of the invention improves the bubble detection reliability. The two bubble sensors in the bubble sensor unit form a redundant structure, so that bubbles in the injection pipeline are detected, and the reliability of detecting the bubbles is improved.

2. The high-safety contrast agent injection system improves the reliability of contrast agent injection. The self-diagnosis unit is arranged to diagnose the signals sent by the key unit, so that faults can be found in time and alarm prompt can be given in the working process, and unnecessary influence on the treatment process due to system problems is avoided.

3. The high-safety contrast agent injection system improves the safety of an electric control system. Through setting up the safety protection unit, in case serious trouble appears in system working process, and the system fails to respond, this safety protection unit can output the safety protection signal, cuts off power supply, makes radiography injection unit, salt solution wriggling unit can not work, plays the guard action to patient.

4. The invention improves the overall safety of the system. Through setting up relief valve and manual protection switch, improve the whole security of system, when electrical system can not work, and when the contrast medium injection in-process produced high flow, high pressure injection, the relief valve starts, breaks off the pipeline between with the patient, and the protection patient avoids the damage. Meanwhile, the medical staff can cut off the power supply through the manual protection switch.

5. The system of the invention applies an automatic control technology, and improves the working efficiency compared with manual contrast agent injection.

6. The system can set different flow rates and flow rates according to different causes, achieves accurate injection, reduces the influence of a contrast medium on a patient, and reduces the influence of X-rays on doctors and patients.

Drawings

Fig. 1 is a block diagram illustrating the overall configuration of one embodiment of the high safety contrast media injector system of the present invention.

Fig. 2 is a schematic block diagram of the connection of the self-diagnostic unit and the associated units in the high safety contrast media injector system of the present invention.

Fig. 3 is a schematic block diagram of the connection between the safety protection unit and the related units in the high-safety contrast medium injection system of the present invention.

fig. 4 is a schematic block diagram of the connection of a contrast injection unit and associated units in the high safety contrast media injection system of the present invention.

Fig. 5 is a schematic block diagram of the connection of the microprocessor unit and associated units in the high safety contrast media injector system of the present invention.

Fig. 6 is a block diagram illustrating the structure of another embodiment of the high safety contrast media injector system of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.

As shown in fig. 1, a high-safety contrast agent injection system comprises a contrast injection unit, a microprocessor unit, a safety protection unit, a self-diagnosis unit, a control unit, an alarm prompting unit, a control and display unit, a power supply unit, a medical three-way switching device and a saline peristaltic unit, wherein the contrast injection unit is electrically connected with the microprocessor unit, the self-diagnosis unit and the safety protection unit respectively; the microprocessor unit is electrically connected with the saline peristaltic unit, the control and display unit, the self-diagnosis unit, the radiography injection unit, the medical three-way switching device, the safety protection unit, the alarm prompting unit and the control unit; the safety protection unit is electrically connected with the self-diagnosis unit, the microprocessor unit, the radiography injection unit and the alarm prompting unit; the self-diagnosis unit is electrically connected with the microprocessor unit, the radiography injection unit, the control and display unit, the control unit and the safety protection unit; the control unit is electrically connected with the self-diagnosis unit and the microprocessor unit respectively; the alarm prompting unit is electrically connected with the microprocessor unit and the safety protection unit respectively; the medical three-way switching device is respectively communicated with the radiography injection unit and the saline peristaltic unit through hoses in a fluid mode, and the medical three-way switching device and the saline peristaltic unit are electrically connected with the micro-processing unit; the power supply unit supplies power to the high-safety contrast agent injection system.

The invention realizes the self-diagnosis function of the system by arranging the self-diagnosis unit. As shown in fig. 2, the self-diagnosis unit includes an imaging injection unit diagnosis module, a manipulation unit diagnosis module, a control and display unit diagnosis module, and a safety protection unit diagnosis module. After the system is electrified and started to operate, the microprocessor unit periodically sends a diagnosis instruction to the self-diagnosis unit, the radiography injection unit diagnosis module, the control and display unit diagnosis module and the safety protection unit diagnosis module are started, signals from the radiography injection unit, the control and display unit and the safety protection unit are respectively judged, a fault signal is judged and identified, fault information is sent to the microprocessor unit, and corresponding fault information is output through the control and display unit and the alarm prompting unit which are connected with the microprocessor unit. The contrast injection unit diagnosis module is used for judging the working state of the contrast injection unit, setting a fault mode according to a specific failure mode of the contrast injection unit, establishing a self-diagnosis mode by the contrast injection unit and the self-diagnosis unit, automatically identifying the contrast injection unit diagnosis module if the contrast injection unit fails, sending a fault signal to the microprocessor unit, and outputting the fault information of the contrast injection unit through the control display unit and the alarm prompting unit. The operation and control unit diagnosis module is used for judging the working state of the operation and control unit, setting a fault mode according to a specific failure mode of the operation and control unit, establishing a self-diagnosis mode between the operation and control unit and the self-diagnosis unit, automatically identifying the operation and control unit diagnosis module if the operation and control unit fails, sending a fault signal to the microprocessor unit, and outputting the fault information of the operation and control unit through the control and display unit and the alarm prompt unit. The control display unit diagnosis module is used for judging the working state of the control display unit, setting a fault mode according to the specific failure mode of the control display unit, establishing a self-diagnosis mode by the control display unit and the self-diagnosis unit, automatically identifying the control display unit diagnosis module if the control display unit fails, sending a fault signal to the microprocessor unit, and outputting the fault information of the control display unit through the alarm prompting unit. The safety protection unit diagnosis module is used for judging the working state of the safety protection unit, setting a fault mode according to a specific failure mode of the safety protection unit, establishing a self-diagnosis mode by the safety protection unit and the self-diagnosis unit, automatically identifying by the safety protection unit diagnosis module if the safety protection unit fails, sending a fault signal to the microprocessor unit, and outputting the fault information of the safety protection unit through the control display unit and the alarm prompting unit. The high-safety contrast agent injection system improves the reliability of contrast agent injection. The self-diagnosis unit is arranged to diagnose the signals sent by the key unit, so that faults can be found in time and alarm prompt can be given in the working process, and unnecessary influence on the treatment process due to system problems is avoided.

As shown in fig. 4, the contrast injection unit includes a driving and controlling module, a servo electric cylinder, a pressure sensor, a contrast bubble sensor, a contrast injection barrel, an injection stroke limit switch, a medical three-way switching device, and an absolute value encoder. One end of the driving and controlling module is electrically connected with the microprocessor unit and receives a driving control signal from the microprocessor unit, and the other end of the driving module is electrically connected with the servo electric cylinder and controls the servo electric cylinder according to the driving control signal from the microprocessor unit; the servo electric cylinder is connected with the contrast agent injection barrel through a piston rod, one end of the contrast agent injection barrel is communicated with one end of the medical three-way switching device through a hose, the other end of the contrast agent injection barrel is communicated with the contrast agent injection hose through a safety valve so as to inject contrast agents outwards, the other end of the medical three-way switching device is communicated with a contrast agent bottle through a hose, the contrast agents are extracted from the contrast agent bottle, and the contrast agent bottle is used for storing and supplying the contrast agents. The contrast agent bubble sensor is arranged on the hose between the contrast agent injection barrel and the medical three-way switching device, and is used for monitoring a bubble signal in the contrast agent hose, and the contrast agent bubble sensor is electrically connected with the microprocessor unit and used for sending a bubble signal to the microprocessor unit. The pressure sensor is arranged in the servo electric cylinder and used for measuring a pressure value generated when the servo electric cylinder operates, and the pressure sensor is electrically connected with the safety protection unit and used for sending the pressure value generated when the servo electric cylinder operates to the safety protection unit. The injection stroke limit switches are respectively installed at the front end and the rear end of the outer side of the servo electric cylinder and are electrically connected with the microprocessor unit, the front and rear limit positions of the servo electric cylinder during operation are monitored, and position signals of the front and rear limit positions of the servo electric cylinder during operation are sent to the microprocessor unit. The absolute value encoder is arranged at the rear end of the servo electric cylinder and used for measuring the displacement and the displacement speed of the servo electric cylinder, the absolute value encoder is electrically connected with the microprocessor unit and used for sending displacement and displacement speed information of the servo electric cylinder to the microprocessor unit, and the absolute value encoder is electrically connected with the safety protection unit and used for sending displacement speed information generated when the servo electric cylinder operates to the safety protection unit.

The pressure sensor and the absolute value encoder are electrically connected with the contrast agent injection unit diagnosis module in the self-diagnosis unit, pressure values generated during operation of the servo electric cylinder and displacement speed information generated during operation of the servo electric cylinder are sent to the contrast agent injection unit diagnosis module, a fault mode is preset according to the specific failure mode of the pressure sensor and the absolute value encoder, the contrast agent injection unit diagnosis module automatically identifies whether a fault exists or not, sends a fault signal to the microprocessor, and outputs fault information corresponding to the contrast agent injection unit through the control display unit and the alarm prompting unit.

In one embodiment, the tubing and the contrast injection tubing are high pressure tubing.

As shown in fig. 5, the microprocessor unit includes a microprocessor and a memory. The microprocessor is electrically connected with the drive control module in the radiography injection unit and sends drive control information to the drive control module. The microprocessor is electrically connected to the contrast agent bubble sensor and receives a bubble status signal from the contrast agent bubble sensor. The microprocessor is electrically connected with the injection travel limit switch and receives a limit signal from the injection travel limit switch. And the microprocessor is electrically connected with the medical three-way switching device and sends a position switching signal to the medical three-way switching device. And the microprocessor is electrically connected with the absolute value encoder and is used for receiving the displacement and displacement speed information of the servo electric cylinder measured by the absolute value encoder. The microprocessor unit is electrically connected to the contrast injection unit diagnostic module in the self-diagnostic unit and receives information from the contrast injection unit diagnostic module. The microprocessor is electrically connected with the control unit diagnosis module and receives information from the control unit diagnosis module. The microprocessor is electrically connected with the diagnosis module of the control and display unit, receives parameter setting information and control instruction information from the control and display unit and sends display information to the control and display unit. The microprocessor is electrically connected with the safety protection unit diagnosis module, receives information from the safety protection unit diagnosis module and sends a failure signal of the microprocessor to the safety protection unit. The control unit comprises a contrast agent operation handle and a saline operation handle, the contrast agent operation handle is electrically connected with the control unit diagnosis module in the self-diagnosis unit and sends diagnosis information to the control unit diagnosis module, the contrast agent operation handle and the saline operation handle are both electrically connected with the microprocessor in the microprocessor unit, the microprocessor receives the control information from the contrast agent operation handle, and the microprocessor receives the control information from the saline operation handle. And the microprocessor is electrically connected with the medical three-way switching device and sends position switching information to the medical three-way switching device. The medical three-way switching device is used for installing and fixing a medical three-way valve and a rotary medical three-way valve and switching a contrast agent injection loop and a saline injection loop. The medical tee joint switching device comprises an intelligent motor, a fixed base, a coupler and a fixed sheet, wherein the intelligent motor is connected with the coupler and drives the coupler to act, the medical tee joint is installed on the coupler and acts together with the coupler, and the fixed sheet fixes the medical tee joint on the fixed base. The intelligent motor is electrically connected with the microprocessor unit, receives a position switching signal from the microprocessor unit, and performs corresponding position switching according to the position switching signal of the microprocessor unit. The microprocessor is electrically connected with the saline water peristaltic unit, sends peristaltic control information to the saline water peristaltic unit and receives bubble state signals monitored by the saline water peristaltic unit. The saline peristaltic unit comprises a peristaltic pump and a saline bubble sensor, the peristaltic pump is installed on a saline hose which is communicated with a saline bag and the medical three-way switching device, the peristaltic pump is electrically connected with a microprocessor in the microprocessor unit and receives a control signal of the microprocessor, the saline bubble sensor is installed on the saline hose which is connected below the saline bag, and the saline bubble sensor is electrically connected with the microprocessor and sends a saline pipeline bubble state signal to the microprocessor. The microprocessor is electrically connected with the alarm prompting unit and sends related alarm prompting information to the alarm prompting unit. The microprocessor is electrically linked with the data storage module, and relevant data are stored in the data storage module.

The microprocessor operates the medical three-way switching device to realize the same-way switching of the contrast agent and the saline. When preparing to inject the contrast agent, the microprocessor automatically sends a command of switching the contrast agent passage to the medical three-way switching device, and the medical three-way switching device communicates the contrast agent injection passage with the pipeline leading to the human body, so that the contrast agent is injected into the human body pipeline through the medical three-way, and simultaneously closes the passage between the saline passage and the pipeline leading to the human body; when saline flushing is needed, the microprocessor automatically sends a saline passage switching instruction to the medical three-way switching device, the medical three-way switching device communicates the saline passage with a pipeline leading to a human body, so that saline is injected into the pipeline leading to the human body through the medical three-way switching device, and meanwhile, a channel between the contrast agent injection passage and the pipeline leading to the human body is closed.

The microprocessor judges the residual amount of the contrast agent in the contrast agent injection barrel through the stroke position acquired by the absolute value encoder. The microprocessor judges a relationship between the remaining amount of the contrast agent and the set injection amount to determine whether the contrast agent needs to be injected. When the residual amount of the contrast agent is smaller than the set injection amount, the microprocessor sends a communication instruction to a medical three-way switching device in the contrast injection unit to communicate a contrast agent bottle with the contrast agent injection barrel, the microprocessor sends a contrast agent injection instruction to the contrast injection unit, a driving module in the contrast injection unit drives a servo electric cylinder, and a servo motor drives a piston rod to move so as to input the contrast agent into the contrast agent injection barrel. In the process, if the contrast agent bubble sensor in the contrast injection unit acquires that bubbles exist in the contrast agent input hose, the microprocessor performs bubble removal operation, and when the contrast agent bubble sensor acquires that no bubbles exist in the pipeline, the contrast agent injection step is completed. When the contrast agent is injected into a patient body, an operator can operate through a touch screen in the control display unit, selects a corresponding injection mode according to needs, and after the selection is finished, the system enters a preparation injection state, the microprocessor unit closes a loop of the contrast agent injection barrel and a contrast agent bottle through a medical three-way switching device in the contrast injection unit, and opens a contrast agent injection passage and a pipeline leading to the human body. The operator can also start the injection operation by operating the handle through the contrast agent in the control unit, and the system can inject according to the set injection mode.

As shown in fig. 3, the safety protection unit includes a protection logic judgment module and a driving protection switch module. The protection logic judgment module is electrically connected with the pressure sensor in the radiography injection unit, receives a pressure value generated when the pressure sensor measures the operation of the servo electric cylinder, and judges whether overpressure (injection overpressure) exists or not; the protection logic judgment module is electrically connected with the absolute value encoder, receives displacement speed (contrast agent injection speed) information generated when the servo electric cylinder runs and measured by the absolute value encoder, and judges whether overspeed (injection overspeed) occurs; the protection logic judgment module is electrically connected with a microprocessor in the microprocessor unit, receives a signal from the microprocessor and judges whether the microprocessor fails; the protection logic judgment module carries out one-out-of-three logic judgment on the received information, the protection logic judgment module is electrically connected with the drive protection switch, when the protection logic judgment module judges that any one of conditions of an injection overpressure value, injection overspeed information and microprocessor failure occurs, the protection logic judgment module outputs a safety protection signal to the drive protection switch module, the drive protection switch module cuts off a power supply of the drive control module in the contrast agent injection unit, meanwhile, the protection logic judgment module outputs alarm information to the alarm prompting unit, and the protection logic judgment module is electrically connected with the safety protection unit diagnosis module in the self-diagnosis unit and sends diagnosis information to the safety protection unit diagnosis module.

The alarm prompting unit comprises a buzzer and an indicator lamp. The buzzer and the indicator light are electrically connected with the microprocessor in the microprocessor unit, receive corresponding information from the microprocessor unit, give a buzzing prompt through the buzzer, and give a light prompt through the indicator light.

The control display unit comprises a touch screen, the touch screen is electrically connected with the microprocessor in the microprocessor unit, receives and displays relevant information from the microprocessor, and sends control instruction information to the microprocessor.

The invention realizes the automatic contrast agent injection mode and the manual contrast agent injection mode through the control display unit and the control unit. The contrast agent automatic injection mode is that the flow speed, the flow and the pressure are set through the control display unit, after the setting is finished, the contrast agent injection is started, and the system performs injection according to the set flow speed and the set flow. The manual contrast agent injection mode is realized through the control unit, and an operator can adjust the contrast agent injection speed through the contrast agent operation handle of the control unit. The operator sets up the velocity of flow, the pressure range of injection through accuse display element, and after the setting was accomplished, select contrast medium operating handle control mode, the system can indicate contrast medium operating handle's zero point calibration, operator carries out zero point calibration through the rotation contrast medium operating handle's carousel. After the calibration is completed, the system prompts preparation injection, an operator can rotate the turntable of the contrast agent operating handle at the moment, reversely rotate from the zero point to the increase, transmit operation information to the microprocessor, the microprocessor processes the operation information and sends corresponding driving and controlling parameters to the driving and controlling module in the contrast injection unit, the driving and controlling module drives the servo electric cylinder, and then the servo electric cylinder advances according to the flow speed of the driving and controlling parameters. If the flow rate needs to be reduced, the operator can rotate the rotating disc towards the zero point.

The automatic saline flushing device realizes the switching between the automatic saline flushing mode and the manual saline flushing mode through the control display unit and the control unit. Saline flushing refers to flushing contrast fluid in a contrast tube and air bubbles in the contrast tube to the body with saline. The automatic flushing mode is that the system is preset with flushing flow speed and flow index before leaving the factory, and when flushing is needed, the control display unit starts a saline flushing instruction, and the system flushes according to preset flow speed and flow. The manual flushing mode is characterized in that the system is controlled through the control unit, the saline flushing speed is adjusted through the saline operating handle of the control unit, the system can prompt zero calibration of the saline operating handle, and an operator conducts zero calibration through rotating the rotating disc of the saline operating handle. After the calibration is completed, the system prompts the preparation of flushing, an operator can rotate the rotating disc of the saline operation handle from a zero point to increase the rotating disc to rotate reversely, operation information is transmitted to the microprocessor, the microprocessor processes the operation information and sends corresponding driving and controlling parameters to the peristaltic pump in the saline peristaltic unit, and the peristaltic pump wriggles according to the flow rate of the driving and controlling parameters. If the flow rate needs to be reduced, the operator can rotate the dial toward the zero calibration direction.

The power supply unit includes a power supply and a system power supply. The power supply supplies power for a driving and controlling module in the radiography injection unit, an intelligent motor in the medical three-way switching device and a peristaltic pump in the saline peristaltic unit. The system power supply supplies power to the bubble sensor unit, the safety protection unit, the control unit, the self-diagnosis unit, the microprocessor unit, the control display unit and the alarm prompting unit; the power is supplied to a contrast agent bubble sensor, an injection stroke limit switch, an absolute value encoder and a pressure sensor in the contrast injection unit; power is supplied to the brine bubble sensor in the brine peristaltic unit.

Example two

The difference between the present embodiment and the first embodiment is: the high-safety contrast media injection system further includes a safety valve, a bubble sensor unit, and a manual protection switch.

As shown in fig. 6, the contrast injection unit is in fluid communication with the medical three-way switching device through a contrast medium hose, a safety valve is disposed on the contrast medium hose, the safety valve includes a speed-limiting valve and a pressure-limiting valve, when the contrast medium injection flow rate exceeds a dangerous flow rate value, the speed-limiting valve is actuated to close the contrast medium injection circuit to prevent the high-speed contrast medium from flowing into the human body, and when the speed-limiting valve is closed, the pressure inside the safety valve reaches the pressure-limiting value, the pressure-limiting valve is opened to perform pressure relief to protect the contrast medium injection circuit.

the bubble sensor unit is arranged on a contrast medium hose at one end of the medical three-way automatic switching device, which is connected with a patient. The bubble sensor unit is a redundant structure formed by combining two bubble sensors, the two bubble sensors are electrically connected with the microprocessor unit and used for monitoring the state of bubbles in a contrast agent hose leading to a human body, and once any one of the bubble sensors monitors the bubbles, the bubble sensor sends a signal to the microprocessor unit. And the microprocessor carries out alarm prompt on the alarm prompt unit and simultaneously sends an injection stopping instruction to a drive control module in the radiography injection unit to stop injection. The operator can also manually close the tee at the patient end to prevent air bubbles from flowing into the patient. The operator judges the bubbles and manually starts the injection function after solving the problem, and the system can inject. The contrast agent bubble sensor is arranged at a hose between the medical three-way switching device and the contrast agent injection barrel and used for monitoring whether a bubble signal exists in the contrast agent hose, the contrast agent bubble sensor is electrically connected with the microprocessor in the microprocessor unit, if the bubble signal exists, the bubble signal is sent to the microprocessor, the microprocessor automatically exhausts bubbles until the contrast agent bubble sensor does not detect the bubble, and meanwhile, the information of the existence of the contrast agent bubble is displayed to the control and display unit and the operator is prompted. The brine bubble sensor is arranged on a brine hose below the brine bag and is electrically connected with the microprocessor, a brine pipeline bubble state signal is sent to the microprocessor, if bubbles are detected, a bubble signal is sent to the microprocessor, the microprocessor automatically exhausts the bubbles until the brine bubble sensor does not detect the bubbles, and meanwhile, the information of whether the brine bubbles exist is displayed on the control display unit, and an operator is prompted. The system of the invention improves the bubble detection reliability by arranging the bubble sensor unit in the pipeline leading to the body of the patient, arranging the contrast agent bubble sensor in the contrast injection unit and arranging the saline bubble sensor in the saline peristaltic unit.

The contrast agent bubble sensor can detect contrast agent bubble information and can detect whether contrast agent exists in a hose between a contrast agent bottle and a contrast agent injection barrel. The contrast agent liquid level detection is carried out when contrast agent is injected into the contrast agent injection barrel from the contrast agent bottle, if no contrast agent is detected, the microprocessor sends a signal without the contrast agent to the control and display unit, and an operator operates according to information displayed by the control and display unit. The saline bubble sensor can detect saline bubble information and can also detect whether saline exists in a hose between the saline bag and the medical three-way switching device, if no saline exists, the microprocessor unit sends a saline-free signal to the control display unit, and an operator operates according to the information displayed by the control display unit.

The manual protection switch is electrically connected with the safety protection unit, and an operator starts the manual protection switch to send a safety protection signal to the safety protection unit.

The high-safety contrast agent injection system has a safety protection function. The safety protection function is realized by a safety protection unit, a safety valve and a manual protection switch. As shown in fig. 3, the protection logic judgment module in the safety protection unit collects injection overpressure and injection overspeed in the pressure sensor and the absolute value encoder in the contrast injection unit, and collects microprocessor failure signals of the microprocessor unit, and performs one-out-of-three logic judgment, and once any one of the states of the injection overpressure, injection overspeed, and microprocessor failure signals occurs, the protection logic judgment module outputs a safety protection signal to the driving protection switch module, the driving protection switch module cuts off the power supply of the driving control module in the contrast injection unit, and the protection logic judgment module outputs alarm information to the alarm prompting unit. The protection logic judgment module is electrically connected with a safety protection unit diagnosis module in the self-diagnosis unit, if a microprocessor is in a crash fault, a microprocessor failure signal is sent to the protection logic judgment module in the safety protection unit, after the protection logic judgment module carries out one-out-of-three logic judgment, the protection logic judgment module outputs a safety protection signal to the driving protection switch module, the driving protection switch module cuts off a power supply of the driving control module in the contrast agent injection unit, meanwhile, the protection logic judgment module outputs alarm information to the alarm prompting unit, the driving control module stops driving the servo electric cylinder, injection is interrupted, and a human body is protected from being injured.

Through setting up relief valve and manual protection switch, can improve the whole security of system. When high-flow-rate and high-pressure injection is generated in the contrast agent injection process, the safety valve is started to cut off a pipeline between the safety valve and a patient, so that the patient is protected from being damaged. That is, when the flow rate of the contrast medium in the contrast medium tube leading to the patient's body exceeds the flow rate of the speed limit valve in the safety valve, the speed limit valve is actuated to close the contrast medium injection circuit, preventing the high-speed contrast medium from flowing into the body. When the speed limiting valve is closed and the pressure in the safety valve reaches a pressure limiting value, the pressure limiting valve is opened to release the pressure so as to protect the contrast agent injection circuit.

When the electric control system can not work and an operator finds that dangerous conditions exist, the power supply can be cut off through the manual protection switch. Namely, the manual protection switch sends a closing driving instruction to the driving protection switch module in the safety protection unit, and the driving protection switch cuts off the power supply of the driving control module in the radiography injection unit.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.

Claims (10)

1. A high-safety contrast medium injection system is characterized by comprising a contrast injection unit, a microprocessor unit, a safety protection unit, a self-diagnosis unit, a control unit, an alarm prompting unit, a control and display unit, a power supply unit, a medical three-way switching device and a saline peristaltic unit, wherein the contrast injection unit is electrically connected with the microprocessor unit, the self-diagnosis unit and the safety protection unit respectively; the microprocessor unit is electrically connected with the saline peristaltic unit, the control and display unit, the self-diagnosis unit, the radiography injection unit, the medical three-way switching unit, the safety protection unit, the alarm prompting unit and the control unit; the safety protection unit is electrically connected with the self-diagnosis unit, the microprocessor unit, the radiography injection unit and the alarm prompting unit; the self-diagnosis unit is electrically connected with the microprocessor unit, the radiography injection unit, the control and display unit, the control unit and the safety protection unit; the control unit is electrically connected with the self-diagnosis unit and the microprocessor unit respectively; the alarm prompting unit is electrically connected with the microprocessor unit and the safety protection unit respectively; the medical three-way switching device is respectively communicated with the radiography injection unit and the saline peristaltic unit through pipelines in a fluid mode, and the medical three-way switching device and the saline peristaltic unit are electrically connected with the microprocessor unit; the power supply unit supplies power to the high-safety contrast agent injection system.

2. The high-safety contrast medium injection system according to claim 1, wherein the self-diagnosis unit includes a contrast injection unit diagnosis module, a manipulation unit diagnosis module, a control and display unit diagnosis module, and a safety protection unit diagnosis module, and the contrast injection unit diagnosis module, the manipulation unit diagnosis module, the control and display unit diagnosis module, and the safety protection unit diagnosis module respectively judge signals from the contrast injection unit, the manipulation unit, the control and display unit, and the safety protection unit, judge and identify a fault signal, send fault information to the microprocessor unit, and output corresponding fault information through the control and display unit and the alarm prompting unit connected to the microprocessor unit.

3. The high safety contrast media injection system of claim 1, wherein said contrast injection unit comprises a drive and control module, a servo electric cylinder, a pressure sensor, a contrast media bubble sensor, a contrast media injection barrel, an injection travel limit switch, a medical three-way switching device, an absolute value encoder.

4. The high safety contrast media injection system of claim 3, wherein one end of said drive and control module is electrically connected to said microprocessor unit for receiving a drive control signal from said microprocessor unit, and the other end of said drive module is electrically connected to said servo cylinder for controlling said servo cylinder according to the drive control signal from said microprocessor unit; the servo electric cylinder is connected with the contrast agent injection barrel, the contrast agent injection barrel is communicated with the medical three-way switching device through a pipeline, the contrast agent bubble sensor is arranged on the pipeline between the contrast agent injection barrel and the medical three-way switching device, the pressure sensor is arranged inside the servo electric cylinder and is electrically connected with the microprocessor unit, the safety protection unit and the self-diagnosis unit, the injection stroke limit switch is arranged outside the servo electric cylinder and is electrically connected with the microprocessor unit, the absolute value encoder is arranged on the servo electric cylinder, and the absolute value encoder is electrically connected with the microprocessor unit, the self-diagnosis unit and the safety protection unit.

5. The high security contrast media injector system of claim 3, wherein said safety protection unit comprises a protection logic decision module and an actuation protection switch module.

6. The high safety contrast media injector system of claim 5, wherein said protection logic determination module is electrically connected to said pressure sensor in said contrast injection unit, receives a pressure value from said pressure sensor generated during operation of said servo cylinder, and determines whether said pressure is excessive; the protection logic judgment module is electrically connected with the absolute value encoder, receives displacement speed information which is measured by the absolute value encoder and generated when the servo electric cylinder operates, and judges whether overspeed occurs; the protection logic judgment module is electrically connected with a microprocessor in the microprocessor unit, receives a signal from the microprocessor and judges whether the microprocessor fails; the protection logic judgment module carries out one-out-of-three logic judgment on the received information, the protection logic judgment module is electrically connected with the drive protection switch, when the protection logic judgment module judges that any one of conditions of an injection overpressure value, injection overspeed information and microprocessor failure occurs, the protection logic judgment module outputs a safety protection signal to the drive protection switch module, and the drive protection switch module cuts off a power supply of the drive control module in the contrast agent injection unit.

7. The high-safety contrast media injection system of claim 1, further comprising a bubble sensor unit disposed at an end of the medical tee auto-switching device connected to a patient.

8. The high security contrast media injection system of claim 1, further comprising a manual protection switch electrically connected to said safety protection unit, wherein an operator sends a safety protection signal to said safety protection unit by activating said manual protection switch.

9. The high-safety contrast agent injection system according to claim 1, wherein the medical tee joint switching device comprises an intelligent motor, a fixed base, a coupler and a fixing plate, the intelligent motor is connected with the coupler and drives the coupler to act, the medical tee joint is installed on the coupler and acts together with the coupler, and the fixing plate fixes the medical tee joint on the fixed base.

10. The high safety contrast media injector system of claim 1, wherein said contrast injection unit is in fluid communication with said medical three-way switching device through a contrast media syringe having a safety valve disposed thereon, said safety valve comprising a rate limiting valve and a pressure limiting valve.