CN113332525A - Screen magnetic quantitative infusion system - Google Patents
Screen magnetic quantitative infusion system Download PDFInfo
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- CN113332525A CN113332525A CN202110588283.6A CN202110588283A CN113332525A CN 113332525 A CN113332525 A CN 113332525A CN 202110588283 A CN202110588283 A CN 202110588283A CN 113332525 A CN113332525 A CN 113332525A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
- A61M5/14526—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons the piston being actuated by fluid pressure
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/74—Details of notification to user or communication with user or patient ; user input means
- A61B5/746—Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/36—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests with means for eliminating or preventing injection or infusion of air into body
- A61M5/365—Air detectors
Abstract
The invention discloses a screen magnetic quantitative infusion system, which comprises a screen magnetic quantitative infusion device, a finger-pressure oximeter and an ECG monitor, wherein a motor of the screen magnetic quantitative infusion device adopts a non-magnetic rotary piezoelectric motor, and leads are made of non-magnetic metal materials or high-impedance non-metal materials with conductivity; electromagnetic shielding covers are arranged inside the screen magnetic quantitative infusion device and on elements or modules radiating electromagnetic waves outwards in the finger-pressure oximeter and the ECG monitor, so that mutual interference between a magnetic resonance magnetic field and the magnetic field of the system is effectively prevented, the safety of the use process is better ensured, and the influence caused by too close distance from the magnetic resonance equipment can be avoided. The improved new peristaltic pump structure further improves the infusion precision, and meanwhile, the system has a physiological parameter monitoring function. Therefore, the technical scheme of the system has more advantages in the aspects of safety and infusion precision than the prior art.
Description
Technical Field
The invention belongs to the field of quantitative infusion in a high-intensity magnetic field environment, and particularly relates to a screen magnetic quantitative infusion system.
Background
Aiming at a screen magnetic quantitative infusion system, such as Chinese patent with publication number CN109009112A, the method discloses a Faraday-cage-based magnetic resonance compatible infusion system, and the method separates the infusion system from a magnetic resonance strong magnetic environment by adopting a Faraday-cage shielding module without a magnetic metal material and a supporting module without a magnetic material, so that electromagnetism generated between the infusion module and the magnetic resonance equipment is not interfered with each other, and finally, a patient can carry out infusion operation while carrying out nuclear magnetic scanning in the magnetic resonance strong magnetic environment. "
However, the mode of magnetic shielding based on the faraday cage can generate the same amount of different charges on the outer surface of the faraday cage, and if a user carelessly touches the area with concentrated distribution of the two charges at the same time, a loop is formed, and a certain electric shock risk exists. Meanwhile, in a magnetic resonance compatible infusion system based on a Faraday cage, the infusion workstation 34 is a common infusion workstation or a magnetic resonance compatible infusion workstation, namely, the Faraday cage is used for carrying out magnetic shielding on the existing infusion workstation, and optimization of the existing infusion workstation is not mentioned. In addition, even with the faraday cage shielding module, the infusion system can still be adversely affected when the magnetic field strength is too high due to the infusion system 100 being too close to the nuclear magnetic resonance device. This inspires how much more we think of avoiding this effect due to too close a magnetic resonance device.
For a quantitative infusion system, such as a chinese patent, publication No. CN111317884A, discloses a portable electronic infusion pump, "on the other hand, three coaxial cams are used to drive corresponding ejector blocks to move sequentially, so as to achieve quantitative material taking and quantitative output of an infusion tube, and form a peristaltic process", that is, a form in which the three ejector blocks respectively extrude the infusion tube is used to achieve quantitative infusion, but this ignores deformation of the infusion tube after each extrusion, and especially when the infusion rate is fast, the deformation of the infusion tube may not be recovered in time, which results in inconsistent volume of the liquid medicine output in each cycle.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a screen magnetic quantitative infusion system which has the advantages that the magnetic resonance magnetic field and the magnetic field of the system can be effectively prevented from interfering with each other, the safety in the using process is ensured, and the influence caused by too close distance to a magnetic resonance device is avoided; meanwhile, the infusion precision is further improved by the improved novel peristaltic pump structure.
The technical scheme is as follows: the invention comprises a screen magnetic quantitative infusion device, a finger pressure type oximeter and an ECG monitor; the screen magnetic quantitative infusion device comprises a first controller, and a power part, a first display screen and a first communication module which are respectively connected with the first controller, wherein the power part comprises a mechanical structure, a motor and a motor driving module which are sequentially connected, and the motor driving module is connected with the first controller; the mechanical structure comprises a first mechanical structure for mounting the infusion tube and a second mechanical structure for mounting the injector, each mechanical structure is provided with a motor, and the motors are driven by a motor driving module controlled by a first controller to rotate so as to drive the mechanical structures to extrude the infusion tube or continuously push the injector; the screen magnetic quantitative infusion device is connected with the finger-pressure oximeter and the ECG monitor through a first communication module; the motor of the screen magnetic quantitative infusion device adopts a non-magnetic rotating piezoelectric motor, and the leads are made of non-magnetic metal materials or high-impedance non-metal materials with conductivity; electromagnetic shielding covers are arranged in the screen magnetic quantitative infusion device and on elements or modules which radiate electromagnetic waves outwards in the finger-pressure oximeter and the ECG monitor.
The first mechanical structure is arranged at the left end of the screen magnetic quantitative infusion device and comprises a first motor and a plurality of cams connected with a rotating shaft of the first motor, and the first motor rotates to drive the cams to regularly and periodically extrude the infusion tube; in addition, the first and last two cams are different in structure from the middle cam, and the first and last two cams serve as a locking structure.
The second mechanical structure is arranged at the right end of the screen magnetic quantitative infusion device and comprises a fixed bottom plate, a front baffle, a middle baffle and a rear baffle, wherein the front baffle, the middle baffle and the rear baffle are vertically arranged above the fixed bottom plate, and an injector is arranged between the front baffle and the middle baffle; the front baffle, the middle partition plate and the rear baffle are connected through an optical axis, a sliding block is slidably mounted on the portion, located between the middle partition plate and the rear baffle, of the optical axis, and the sliding block is controlled by a motor to reciprocate on the optical axis.
A rigid coupling is arranged on the right side of the rear baffle and used for connecting a second motor and a ball screw, one end of the rigid coupling is connected with an output shaft of the second motor, and the other end of the rigid coupling is connected with the ball screw; the second motor drives the ball screw to rotate through the rigid coupler when rotating, and the ball screw drives the sliding block to rotate when rotating; the optical axis is used for limiting the rotation of the sliding block and converting the rotation motion of the sliding block into linear motion, so that the sliding block moves linearly along the optical axis.
The screen magnetic quantitative infusion device further comprises a bubble detection part connected with the first controller, the bubble detection part is arranged on two sides of the infusion tube and used for detecting bubbles in the infusion tube and transmitting a detection result to the first controller.
The bubble detection part adopts an ultrasonic bubble detector.
The screen magnetic quantitative infusion device also comprises pressure sensors arranged at two ends of the infusion tube and used for monitoring the hydraulic pressure in the infusion tube in real time; the pressure sensor is connected with the first controller and transmits a monitoring result to the first controller in real time.
The pressure sensor is a flexible thin film pressure sensor made of nonmagnetic materials.
The device further comprises a remote control instrument, and a second communication module of the remote control instrument is connected with a first communication module of the screen magnetic quantitative infusion device.
A first key module is arranged below a first display screen of the screen magnetic quantitative infusion device.
Has the advantages that: compared with the prior art, the invention has the beneficial effects that: (1) the core component of the screen magnetic quantitative infusion device is a nonmagnetic rotary piezoelectric motor, a Faraday cage electromagnetic shielding cover is additionally arranged on a circuit and a module which generate electromagnetic waves inside the screen magnetic quantitative infusion device, and leads are all made of nonmagnetic metal materials or high-impedance non-metallic materials with conductivity, so that the safety in the using process is better ensured, and the influence caused by too close distance to magnetic resonance equipment can be better avoided; (2) the improved novel peristaltic pump structure further improves the infusion precision, and meanwhile, the system has a physiological parameter monitoring function, so that the nursing continuity is ensured, and the preparation time and the transfer time of a patient for magnetic resonance examination are reduced; (3) the wireless remote control device is provided, so that the medicine can be remotely instilled in the control room without suspending or suspending the scanning sequence, the MRI scanning device is used efficiently, and the throughput of the magnetic resonance examination service is improved.
Drawings
FIG. 1 is a schematic diagram of the working principle of the present invention;
FIG. 2 is a schematic view of the magnetic shield quantitative infusion device of FIG. 1;
FIG. 3 is a schematic diagram of a first mechanical structure according to the present invention;
FIG. 4 is a block diagram of a cam included in the first mechanical configuration of the present invention;
FIG. 5 is a block diagram of a second mechanical configuration of the present invention;
fig. 6 is a schematic view of an application scenario of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail below with reference to the detailed description and the accompanying drawings.
As shown in fig. 1, 2 and 6, the present invention comprises a container 2 containing a liquid medicine, an injector 3 containing a medicine, a screen magnetic quantitative infusion device 4, an infusion tube 5 of an infusion apparatus, an examining table 6, an auxiliary bracket 7, a finger-pressure oximeter 8, an electrocardiograph monitor 9 and a remote controller 10. Wherein, the container 2 filled with the liquid medicine is a conventional liquid medicine container such as an infusion bag, an infusion bottle and the like. The couch 6 is a conventional magnetic resonance couch adapted with a magnetic resonance scanner. The auxiliary bracket 7 is made of nonmagnetic material and can be an infusion trolley or an infusion table made of nonmagnetic material. The finger oximeter 8 is a 3.0T magnetic resonance system compatible finger oximeter. The electrocardiograph monitor 9 is an electrocardiograph acquisition and processing system compatible with a 3.0T magnetic resonance system. The remote controller 10 is not able to work in a high magnetic field environment of a magnetic resonance room because of the built-in sound alarm, and is only used in a normal environment such as a control room, so that although a clock circuit and a controller therein radiate electromagnetic waves, any part of the remote controller 10 does not need to be shielded by an electromagnetic shield.
In order to better explain the technical scheme of the screen magnetic quantitative infusion system, the screen magnetic quantitative infusion system is divided into the following parts: the monitoring system comprises a control center, a man-machine interaction part, a power part, an alarm part, a detection part, a monitoring part, a communication part, a power part and a magnetic shielding part.
The control center is composed of a first controller and a second controller, and the control centers are respectively used as the control centers of the screen magnetic quantitative infusion device 4 and the remote control instrument 10. The first controller is respectively connected with the power part, the first display screen 16 and the first communication module, controls the power part and the alarm part to execute operation according to data transmitted back by the man-machine interaction part, the detection part, the monitoring part and the communication part of the remote controller 10 of the screen magnetic quantitative infusion device 4, and transmits the data to the remote controller 10 in real time through the communication part of the screen magnetic quantitative infusion device 4. The second controller controls the remote controller 10 to execute correct operation of the man-machine interaction part and the alarm part according to data transmitted back by the communication part of the screen magnetic quantitative infusion device 4, and transmits parameters set by a remote operator 11 under the prompt of a second display screen through the second key module to the screen magnetic quantitative infusion device 4 in real time, so that the screen magnetic quantitative infusion device 4 is remotely monitored. The first controller and the second controller are of an optional type such as MSP430 series and STM32 series.
The man-machine interaction part comprises a first display screen 16, a first key module 19, a second key module, a second display screen and a start key. The first display screen 16 and the second display screen have the same function, and are mainly used for displaying the working process and the state information of the system and assisting a user in performing faster operation. The first key module 19 is disposed below the first display screen 16. The user sets the infusion amount, the infusion rate and selects the working mode through the first key module 19 and the second key module, and the computer is powered on and powered off through the power-on key. The second key module is a conventional key switch. The selectable types of the first display screen 16 and the second display screen are an OLED display screen, a TFT liquid crystal screen and an LCD liquid crystal screen.
Wherein, the power part comprises mechanical structure, motor drive module. The motor is a nonmagnetic rotating piezoelectric motor, the housing and other components of this type of motor are made of nonmagnetic alloy and can be used compatibly even inside the MRI machine without disturbing the image, and the nonmagnetic piezoelectric motor has a magnetic flux density of less than 1nT at a distance of 10mm from the motor housing. The motor is driven by the motor driving module controlled by the first controller to rotate, and the mechanical structure converts the rotation into extrusion movement on the infusion tube 5 of the disposable infusion apparatus or continuous pushing on the injector 3 containing the medicine. The structure of the mechanical structure under the infusion mode is different from that under the injection mode, so the mechanical structure has two structural forms, specifically as follows:
as shown in fig. 3 and 4, the first is a first mechanical structure 121 disposed at the left end of the screen magnetic quantitative infusion device 4, the first mechanical structure 121 includes a plurality of cams connected to the rotating shaft of the motor, the first and last cams are different from the middle cam in structure, and the first and last cams serve as locking structures. In the infusion mode, the upper end 107 of the infusion tube is the end close to the container 2 filled with the liquid medicine, the lower end 109 of the infusion tube is the section close to the patient 1, the first motor 13 rotates by the rotation of the first cam 101, the second cam 102, the third cam 103, the fourth cam 104, the fifth cam 105 and the sixth cam 106 which are connected with the rotation shaft of the first motor 13, each cam also rotates by one circle, and the cam rotates to regularly and periodically extrude the infusion tube 5 along with the rotation of the first motor 13, so that the purpose of quantitative liquid discharge is realized. The order of cam rotation per cycle is: the first cam 101 compresses the infusion tube 5 along with the rotation of the rotating shaft, so that the remaining section of the infusion tube 5 is deformed again and filled with liquid medicine, then the second cam 102 is gradually pressed down until the second cam is compressed finally, so that the remaining section (except the section corresponding to the first cam 101) of the infusion tube 5 is deformed again and filled with liquid medicine, then the third cam 103 is gradually pressed down until the third cam is compressed finally, so that the remaining section (except the sections corresponding to the first cam 101 and the second cam 102) of the infusion tube 5 is filled with liquid medicine, then the fourth cam 104 is gradually pressed down until the fourth cam is compressed finally, so that the remaining section (except the sections corresponding to the first cam 101, the second cam 102 and the third cam 103) of the infusion tube 5 is filled with liquid medicine, meanwhile, the second cam 102 is gradually released and extruded until the infusion tube is not extruded completely, and when the fourth cam 104 is compressed, the second cam 102 is just opened completely, then the fifth cam 105 is gradually pressed down until the fifth cam is finally pressed down, so that the rest section of the infusion tube 5 (except the section corresponding to the first cam 101, the second cam 102, the third cam 103 and the fourth cam 104) is filled with the liquid medicine, meanwhile, the third cam 103 is gradually released from pressing until the infusion tube is not pressed at all, when the fifth cam 105 is pressed down, the third cam 103 is just opened completely, then, the sixth cam 106 is gradually pressed down until the sixth cam 104 is finally pressed down, so that the rest section of the infusion tube 5 (except the section corresponding to the first cam 101, the second cam 102, the third cam 103, the fourth cam 104 and the fifth cam 105) is filled with the liquid medicine, meanwhile, when the sixth cam 106 is pressed down, the fourth cam 104 is just opened completely, and then, the fifth cam 105 gradually releases the compression until the infusion tube is completely not compressed, then, under the rotation of the first cam 101, the corresponding peristaltic sheet 29 compresses the remaining segment of the infusion tube 5 (except the segment corresponding to the first cam 101 and the sixth cam 106), so that the segment is deformed and filled with liquid, finally, the sixth cam 106 gradually releases the compression until the infusion tube is completely not compressed, and simultaneously, the second cam 102 is gradually pressed down until the final compression, so that the remaining segment of the infusion tube 5 (except the segment corresponding to the first cam 101 and the second cam 102) is filled with liquid medicine, and the liquid medicine is repeatedly circulated, thereby ensuring that the volume of the liquid medicine extruded in each period of the cams 1-6 which are sequentially and completely pressed down is fixed.
As shown in fig. 5, the second type is a second mechanical structure 122 arranged at the right end of the screen magnetic quantitative infusion device 4, the second mechanical structure 122 comprises a fixed bottom plate 301, and a front baffle 302, a middle partition plate 303 and a rear baffle 304 vertically arranged above the fixed bottom plate 301, wherein a through hole is formed in the front baffle 302, and a 'U' -shaped groove is formed in the middle partition plate 303 corresponding to the through hole of the front baffle 302 for installing the injector 3; the front baffle 302, the intermediate partition 303, and the rear baffle 304 are connected by an optical axis 307.
The front baffle plate 302 and the middle partition plate 303 are used for supporting and fixing the disposable syringe, namely the front end of an empty cylinder of the disposable syringe penetrates through a round hole on the front baffle plate 302, and a protrusion at the tail end of the empty cylinder is blocked by a 'U' -shaped groove of the middle partition plate 303 to limit the empty cylinder to move towards the front baffle plate 302; the slider 306 can reciprocate on the optical axis 307 under the control of a motor, and the range of motion of the slider is limited by the intermediate partition 303 and the rear baffle 304. When the sliding block 306 moves towards the direction of the middle partition plate 303, the piston handle of the disposable injector is pushed to extrude the liquid in the disposable injector, and the sliding block 306 moves towards the direction of the rear baffle plate 304 and is separated from the piston handle of the disposable injector, so that the disposable injector can be conveniently taken down and replaced again. The rigid coupling 308 is used to connect the second motor 14 and the ball screw 305, and has one end connected to the output shaft of the second motor 14 and one end connected to the ball screw 305. When the second motor 14 rotates, the rigid coupling 308 can drive the ball screw 305 to rotate, and when the ball screw 305 rotates, the slider 306 can be driven to rotate. The optical axis 307 is used to restrict rotation of the slider 306 and convert the rotational motion of the slider 306 into linear motion, thereby enabling the slider 306 to move linearly along the optical axis 307. The elastic bandage 309 serves to further secure the disposable syringe.
Wherein, the alarm part comprises a first LED indicator light 17, a second LED indicator light and an audible alarm. The first LED indicator light 17 and the second LED indicator light are used for prompting a user of what working state the system is in through light conversion, green flashing indicates that the user is performing parameter setting, green constant lighting indicates normal working, red flashing indicates that air bubbles exist in the infusion tube, and red constant lighting indicates that an inlet/outlet is blocked. When the system works abnormally, the sound alarm can give out a short sound alarm when the LED indicating lamp is turned on. When the monitoring part monitors that the physiological parameters of the patient 1 exceed the normal range, the monitoring part alarms by a long sound. The second LED indicator light can be selected from a color LED containing red and green. The audible alarm may optionally be a conventional buzzer.
Wherein the detection part is composed of a bubble detection part 18 and a pressure sensor 20. In this embodiment, the bubble detecting portion 18 employs an ultrasonic bubble detector, and the system selects piezoelectric ultrasonic probes to be disposed on two sides of an infusion tube of a 5-time infusion set, and respectively transmits and receives ultrasonic waves, and detects bubbles in a projection type manner. The pressure sensor 20 is a flexible film pressure sensor made of non-magnetic materials, detects the pressure of the infusion tube 5 of the infusion apparatus in real time, and controls the alarm part to give an alarm when the pressure is not in a set range.
Wherein, the monitoring part consists of a finger-pressure oximeter 8 and an ECG monitor 9. The finger-pressing oximeter 8 and the ECG monitor 9 are both high-field magnetic resonance compatible hardware, the finger-pressing oximeter 8 is used for monitoring the oxyhemoglobin saturation of the patient 1 in real time, the ECG monitor 9 is used for monitoring the heart rate in real time, if the oxyhemoglobin saturation or the heart rate of the patient 1 exceeds a normal range, the control center performs sound alarm through the control alarm part, and meanwhile, the first display screen 16 and the second display screen in the human-computer interaction part can also display the heart rate, the oxyhemoglobin saturation abnormal value and the ECG waveform in real time.
The communication part is composed of a first communication module and a second communication module. The frequency of the wireless signals transmitted by the first communication module and the second communication module is not equal to the working frequency of the magnetic resonance equipment, and the frequency of the wireless signals does not interfere with magnetic resonance imaging, and the 2.4G module is selected from a 2.4G module consisting of Si24R1 or nRF24L01+ or BK2425 chips. The first communication module and the second communication module are communicated with each other to realize information interaction between the screen magnetic quantitative infusion device 4 and the remote controller 10, and specifically, the first controller transmits parameters set by a user of a human-computer interaction part and information of a monitoring part and a detection part to the second communication module through the first communication module, and then the second controller receives the parameters and responds the information. The second controller transmits the parameters set by the remote operator 11 to the first communication module through the second communication module, and then the first controller responds. Namely, the first communication module and the second communication module perform bidirectional wireless communication, and the remote operator 11 can monitor and change the infusion parameters of the screen magnetic quantitative infusion device 4 through the remote controller 10.
Wherein, the power supply part comprises a first battery and a second battery. The first battery and the second battery are used for supplying power to the system, the first battery is a non-magnetic rechargeable battery, the practicability of the system is improved, and meanwhile, the first controller monitors the residual electric quantity through the battery electric quantity real-time monitoring circuit and displays the residual electric quantity on the first display screen 16 in real time; the second battery is placed in the control room along with the remote control instrument 10, so that the second battery can supply power for commercial power or a rechargeable battery, no requirement is provided for the non-magnetism of the second battery, and if the rechargeable battery is selected, the second controller monitors the residual capacity through the battery capacity real-time monitoring circuit and displays the residual capacity on the second display screen in real time. In this embodiment, the first battery may be a non-magnetic aluminum polymer battery, the first battery is used to supply power to the motor and the first controller, and the first controller monitors the remaining power through the battery power real-time monitoring circuit and displays the remaining power on the first display screen in real time. The second battery is a conventional lithium battery.
The magnetic shielding part consists of a lead and a magnetic shielding cover, wherein the lead consists of a non-magnetic metal material or a high-impedance non-metallic material with conductivity. All the wires of the system are made of non-magnetic metal materials or high-impedance non-metallic materials with conductivity, the non-magnetic metal materials comprise one or more of copper, copper alloy, aluminum alloy and stainless steel, and the high-impedance non-metallic materials with conductivity are carbon materials such as graphite and carbon fibers; the clock circuit, the controller and the like in the system can radiate electromagnetic waves outwards, so that an electromagnetic shielding cover is required to be arranged on an element or a module which radiates the electromagnetic waves outwards, and the shielding cover is a Faraday cage made of nonmagnetic metal materials. The Faraday cage is an equivalent body, the internal potential difference of the Faraday cage is 0, and the electric field is 0, so that the electrostatic field can be prevented from entering or escaping, the electromagnetic wave generated by the operation of the internal device of the Faraday cage and the external strong magnetic environment are not interfered with each other, namely, the strong magnetic field of the magnetic resonance chamber can not interfere the operation of the internal device, and the screen magnetic quantitative infusion system can not interfere the imaging of the magnetic resonance equipment.
The system can realize speed-adjustable quantitative infusion of liquid medicine under the strong magnetic field environment (the strongest 10000 Gauss line) of a 3.0T magnetic resonance scanner, wherein the infusion amount and the infusion rate are set by a user through keys according to the prompt of a display screen, the infusion rate can be regulated and controlled through a wireless remote controller (in a magnetic resonance control room), and the physiological parameters of a patient are continuously monitored, and the system has two selectable infusion modes of Intravenous Drip (IVD) and Intravenous Push (IVP), wherein the IVD mode is suitable for infusion of large-dose liquid medicine, such as glucose infusion, physiological saline infusion and the like; the IVP mode is suitable for small-dose liquid medicine injection, such as a diabetic patient with limited disposable insulin requirement and a magnetic resonance contrast agent with limited disposable injection dose but high infusion rate stability requirement, so as to ensure uniform distribution of the contrast agent in blood vessels.
As shown in fig. 6, the application scenario of the present invention is as follows: the patient 1 lies on the examining table 6 of the magnetic resonance room horizontally, the screen magnetic quantitative infusion device 4 is arranged at one side of the examining table 6 in the magnetic resonance room, the container 2 filled with liquid medicine is hung above the screen magnetic quantitative infusion device in an infusion administration mode, the infusion tube 5 of the disposable infusion apparatus penetrates through the screen magnetic quantitative infusion device 4 and is fixed by the groove 31 in the screen magnetic quantitative infusion device, and the movable door cover 30 is pushed to be clamped with the locking groove 32. In the bolus administration mode, the syringe 3 containing the drug is mounted on the second mechanical structure 122 and fixed thereto by the elastic bandage 309, and the container 2 containing the drug solution and the screen magnetic quantitative infusion device 4 are mounted or fixed on the auxiliary stand 7. The infusion tube 5 of the disposable infusion apparatus penetrating through the screen magnetic quantitative infusion device 4 infuses medicine into the arm vein of the patient 1, and the screen magnetic quantitative infusion device 4 can perform man-machine interaction under the prompt of a display screen through keys, so that the infusion amount and the infusion rate can be set manually, and meanwhile, wireless information transmission can be performed between the screen magnetic quantitative infusion device 4 and a remote controller 10 in a control room, namely, a remote operator 11 can also monitor the screen magnetic quantitative infusion device 4. Furthermore, considering the need for monitoring physiological parameters of some patients, the screen magnetic quantitative infusion device 4 is designed to wirelessly receive the physiological parameters from the finger oximeter 8 and the electrocardiograph monitor 9.
The electromagnetic field environment generated by the high-field magnetic resonance equipment during operation mainly comprises a static magnetic field, a gradient magnetic field and a radio-frequency magnetic field. The static magnetic field attracts ferromagnetic metal materials (such as iron, cobalt and nickel), the mechanical action can cause the ferromagnetic element to shift, and the limitation of the amount of the ferromagnetic metal is an effective way to reduce the mechanical action force; because of electromagnetic induction, the conductor can produce the eddy current in the time-varying electromagnetic field, the eddy current has the thermal effect, and the magnetic field produced at the same time can influence the homogeneity and the radio frequency magnetic field of the static magnetic field, thus make the picture produce the artifact and distortion, adopt the wire of the high-impedance non-metallic material and reduce the return road area and can reach the effect of inhibiting the eddy current side effect; the radio frequency magnetic field emits a series of radio frequency pulses, and the influence of the radio frequency magnetic field on the normal work of other systems in the radio frequency magnetic field can be eliminated by adding a magnetic shield.
The screen magnetic quantitative infusion system can normally work under the high magnetic field environment, and is mainly characterized in that the screen magnetic quantitative infusion device 4, the finger pressing type oximeter 8 and the electrocardiograph monitor 9 are magnetically compatible, wherein a motor of the screen magnetic quantitative infusion device 4 is a non-magnetic rotating piezoelectric motor, leads are all made of non-magnetic metal materials or high-impedance non-metallic materials with conductivity, partial circuits and modules can generate electromagnetic waves during working, a Faraday cage electromagnetic shielding cover made of the non-magnetic metal materials is added to the part which generates the electromagnetic waves, the screen magnetic quantitative infusion device 4 is ensured to be magnetically compatible, and the modules needing to be shielded are all arranged inside the screen magnetic quantitative infusion device 4, so that the shielded area is smaller, and the safety is better. The magnetic compatibility scheme of the finger-pressure oximeter 8 and the electrocardiograph monitor 9 is that a faraday cage electromagnetic shielding cover is additionally arranged on a part of modules which can generate electromagnetic waves when the finger-pressure oximeter 8 and the electrocardiograph monitor 9 work, so that the finger-pressure oximeter 8 and the electrocardiograph monitor 9 are also magnetically compatible. Of course, for magnetic compatibility, the container 2 containing the liquid medicine, the injector 3 containing the medicine, the infusion tube 5 of the disposable infusion set and the auxiliary bracket 7 need to be magnetically compatible, but the magnetic compatibility can be realized by conventional means, and the materials for forming the components are non-magnetic, so the description is omitted.
Meanwhile, the system improves the structure of the peristaltic pump in order to enhance the infusion precision. Specifically, on the basis of the scheme of the existing peristaltic pump, at least one structure which enables the infusion tube to recover deformation through filling liquid and at least one locking structure at the front and the back are additionally arranged to ensure that the liquid cannot flow back, so that the infusion precision is further improved. Specifically, in the system, under the rotation of the first cam 101, the corresponding peristaltic sheet 29 presses the remaining segment of the infusion tube 5 (except for the segment corresponding to the first cam 101 and the sixth cam 106), so that the segment is deformed and filled with liquid, finally, the sixth cam 106 gradually looses the pressing until the infusion tube is not pressed at all, and simultaneously, the second cam 102 is gradually pressed down until the sixth cam is pressed down finally, so that the remaining segment of the infusion tube 5 (except for the segment corresponding to the first cam 101 and the second cam 102) is filled with liquid medicine, and the liquid medicine is circulated in a reciprocating manner, so that the volume of the liquid medicine extruded in each period of the cams 1-6 which are pressed down completely in sequence is fixed.
Generally speaking, the core component of the screen magnetic quantitative infusion device 4 in the system is a non-magnetic rotary piezoelectric motor, only a part of circuits and modules generating electromagnetic waves are provided with a Faraday cage electromagnetic shielding cover in the 4-screen magnetic quantitative infusion device, and leads are made of non-magnetic metal materials or high-impedance non-metal materials with conductivity, so that the mutual interference between a magnetic resonance magnetic field and the magnetic field of the system is effectively prevented, the safety in the use process is better ensured, and the influence caused by the fact that the distance between the wires and the magnetic resonance equipment is too close can be better avoided. The improved new peristaltic pump structure further improves the infusion precision, and meanwhile, the system has a physiological parameter monitoring function. Therefore, the technical scheme of the system has more advantages in the aspects of safety and infusion precision than the prior art.
Claims (10)
1. A screen magnetic quantitative infusion system is characterized in that: comprises a screen magnetic quantitative infusion device (4), a finger pressure type oximeter (8) and an ECG monitor (9); the screen magnetic quantitative infusion device (4) comprises a first controller, and a power part, a first display screen (16) and a first communication module which are respectively connected with the first controller, wherein the power part comprises a mechanical structure, a motor and a motor driving module which are sequentially connected, and the motor driving module is connected with the first controller;
the mechanical structure comprises a first mechanical structure (121) for installing the infusion tube (5) and a second mechanical structure (122) for installing the injector (3), each mechanical structure is provided with a motor, and the motors are driven by a motor driving module controlled by a first controller to rotate to drive the mechanical structures to extrude the infusion tube (5) or continuously push the injector (3);
the screen magnetic quantitative infusion device (4) is connected with the finger-pressure oximeter (8) and the ECG monitor (9) through a first communication module;
the motor of the screen magnetic quantitative infusion device (4) adopts a non-magnetic rotary piezoelectric motor, and the leads are made of non-magnetic metal materials or conductive high-impedance non-metal materials; electromagnetic shielding covers are arranged inside the screen magnetic quantitative infusion device (4) and on elements or modules which radiate electromagnetic waves outwards in the finger pressure type oximeter (8) and the electrocardiogram monitor (9).
2. The screen magnetic quantitative infusion system of claim 1, wherein: the first mechanical structure (121) is arranged at the left end of the screen magnetic quantitative infusion device (4) and comprises a first motor (13) and a plurality of cams connected to a rotating shaft of the first motor (13), and the first motor (13) rotates to drive the cams to regularly and periodically extrude the infusion tube (5); in addition, the first and last two cams are different in structure from the middle cam, and the first and last two cams serve as a locking structure.
3. The screen magnetic quantitative infusion system of claim 1, wherein: the second mechanical structure (122) is arranged at the right end of the screen magnetic quantitative infusion device (4) and comprises a fixed bottom plate (301), a front baffle plate (302), a middle partition plate (303) and a rear baffle plate (304) which are vertically arranged above the fixed bottom plate (301), wherein an injector (3) is arranged between the front baffle plate (302) and the middle partition plate (303); the front baffle (302), the middle partition plate (303) and the rear baffle (304) are connected through an optical axis (307), a sliding block (306) is installed on the portion, located between the middle partition plate (303) and the rear baffle (304), of the optical axis (307) in a sliding mode, and the sliding block (306) is controlled by a motor to reciprocate on the optical axis (307).
4. The screen magnetic quantitative infusion system of claim 3, wherein: a rigid coupling (308) is arranged on the right side of the rear baffle (304), the rigid coupling (308) is used for connecting the second motor (14) and the ball screw (305), one end of the rigid coupling (308) is connected with an output shaft of the second motor (14), and the other end of the rigid coupling (308) is connected with the ball screw (305);
when the second motor (14) rotates, the ball screw (305) is driven to rotate through the rigid coupling (308), and when the ball screw (305) rotates, the sliding block (306) is driven to rotate; the optical axis (307) is used for limiting the rotation of the sliding block (306) and converting the rotation motion of the sliding block (306) into linear motion, so that the sliding block (306) moves linearly along the optical axis (307).
5. The screen magnetic quantitative infusion system of claim 1, wherein: the screen magnetic quantitative infusion device (4) further comprises a bubble detection part (18) connected with the first controller, the bubble detection part is arranged on two sides of the infusion tube (5) and used for detecting bubbles in the infusion tube (5) and transmitting a detection result to the first controller.
6. The screen magnetic quantitative infusion system of claim 5, wherein: the bubble detecting section (18) employs an ultrasonic bubble detector.
7. The screen magnetic quantitative infusion system of claim 1, wherein: the screen magnetic quantitative infusion device (4) further comprises pressure sensors (20) arranged at two ends of the infusion tube (5) and used for monitoring the hydraulic pressure in the infusion tube (5) in real time; the pressure sensor (20) is connected with the first controller and transmits the monitoring result to the first controller in real time.
8. The screen magnetic quantitative infusion system of claim 7, wherein: the pressure sensor (20) is a flexible thin film pressure sensor made of nonmagnetic materials.
9. The screen magnetic quantitative infusion system of claim 1, wherein: the device is characterized by further comprising a remote control instrument (10), wherein a second communication module of the remote control instrument (10) is connected with a first communication module of the screen magnetic quantitative infusion device (4).
10. The screen magnetic quantitative infusion system of claim 1, wherein: a first key module (19) is arranged below a first display screen (16) of the screen magnetic quantitative infusion device (4).
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| CN113332525B (en) | 2022-12-06 |
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