Multi-channel infusion allowance monitoring terminal and intelligent infusion support management system

Abstract

The invention discloses a multi-channel infusion allowance monitoring terminal and an intelligent infusion support management system. The monitoring terminal is integrated with a plurality of groups of electromagnetic induction sensors which are used for simultaneously detecting the residual liquid quantity of a plurality of infusion bags and automatically identifying the identity information of a patient in combination with an RFID (Radio Frequency Identification Device) identification module. A control module in the terminal executes a multi-channel isolation algorithm on signals of all sensors, electromagnetic interference of adjacent channels is eliminated, and the residual volume of each bag of infusion is accurately calculated. When a certain bag of liquid is nearly completely infused or infusion is abnormally interrupted, the sound-light alarm module of the terminal can immediately trigger an alarm, and an abnormal infusion bag is positioned through a corresponding indicator lamp. Meanwhile, the terminal can send monitoring data and alarm information to a central monitoring device of a nurse station through a wireless network, and centralized real-time management of infusion of multiple patients is achieved. The system improves the automation and safety of batch infusion monitoring, reduces the patrol workload of nurses, and has the advantages of compact structure, accurate monitoring, wide application range and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a multi-channel infusion remainder monitoring terminal and an intelligent infusion stand management system. Background Art

[0002] In hospital ICUs and other settings, multiple patients often receive intravenous infusions simultaneously. Traditional infusion monitoring relies on nurses manually checking the fluid level in the infusion bag or counting the drip rate, and manually replacing the bag when the fluid is about to run out. If nurses fail to detect the end of the infusion in time, air can enter the infusion line, posing a risk. In ICUs, each patient often has multiple IV bags connected simultaneously, requiring nurses to frequently make rounds, which creates a heavy workload and makes oversights more likely.

[0003] Several devices for monitoring infusion status have emerged in the prior art. For example, some systems measure the weight of infusion bags using a weighing sensor installed on the infusion stand hook to estimate the remaining fluid volume. The data is then transmitted to the nurse's station via wired or wireless means. While this method can monitor fluid volume in real time, each infusion bag requires a separate weighing device, which complicates wiring and is costly. Infrared drip rate sensors are also used to monitor infusion speed or drop count; the cumulative number of drops can estimate the remaining infusion volume. However, the relationship between the number of drops and the actual volume is not strictly linear, and the drop coefficients of different medications vary, leading to large calculation errors. Furthermore, in multi-channel scenarios, closely mounted multiple optical sensors can cause signal crosstalk, reducing monitoring reliability.

[0004] Another approach involves capacitive or electromagnetic induction sensing. For example, a capacitive sensor attached to the outside of an infusion tube detects the presence of liquid inside and filters out interference. However, capacitive sensors are susceptible to environmental humidity and nearby conductors, making it difficult to accurately monitor multiple infusions simultaneously. Electromagnetic induction sensors determine liquid level or flow rate by detecting changes in the magnetic field. For example, existing technologies incorporate a float and a sensing element within an infusion bottle, triggering an alarm when the liquid level drops to a predetermined level. However, such devices can typically only determine whether a single bag of infusion has reached the bottom; they cannot continuously read the remaining capacity, let alone monitor multiple bags of infusion simultaneously.

[0005] In summary, existing technologies for multi-channel infusion monitoring have shortcomings: It's difficult to simultaneously monitor the remaining volume of multiple bags of infusion fluid using a compact device, and it's also difficult to avoid electromagnetic interference between monitoring channels. Furthermore, linking patient identity with infusion information requires manual recording, which is prone to errors. Summary of the Invention

[0006] Technical purpose: In response to the shortcomings of the existing technology, the present invention discloses a multi-channel infusion remaining amount monitoring terminal and an intelligent infusion stand management system, which uses multi-channel electromagnetic induction technology to measure the remaining liquid volume of multiple infusion bags in real time, and combines patient identity recognition and centralized alarm management to improve the efficiency and safety of batch infusion management.

[0007] Technical solution: To achieve the above technical objectives, the present invention adopts the following technical solution:

[0008] A multi-channel infusion remaining amount monitoring terminal is embedded in the column slide rail of an infusion stand, comprising:

[0009] Multiple electromagnetic induction sensors are arranged along the slide rails of the infusion stand, corresponding to the positions of multiple suspended infusion bags, and are used to sense the remaining liquid amount signal of each corresponding infusion bag;

[0010] An RFID identification module is used to read the radio frequency tag information of the infusion bag or the patient identification to obtain the patient identity and infusion information and associate it with each of the electromagnetic induction sensors;

[0011] a control module electrically connected to the electromagnetic induction sensors and the RFID identification module, configured to collect liquid quantity signals from the electromagnetic induction sensors, execute a multi-channel signal isolation algorithm to process the collected signals, calculate the actual remaining liquid volume of each infusion bag, and generate an alarm control instruction when an abnormal state is detected;

[0012] The alarm module includes a sound alarm device and a light alarm device. The light alarm device is configured to correspond to each electromagnetic induction sensor. When the alarm control instruction of the control module is triggered, the sound alarm device emits a sound alarm, and the indicator unit corresponding to the abnormal infusion bag position in the light alarm device emits a visual alarm to locate the abnormal infusion bag.

[0013] Preferably, the electromagnetic induction sensor includes a coil and a movable magnetic core connected to the infusion bag suspension mechanism. When the weight of the infusion bag changes, the position of the magnetic core in the coil changes, thereby causing the coil induction signal to change. The control module calculates the remaining liquid weight or liquid volume in the infusion bag by detecting the change in the coil induction signal.

[0014] Preferably, the control module sequentially excites each electromagnetic induction sensor to collect signals, and performs decoupling calculation on the signals collected by different electromagnetic induction sensors to eliminate electromagnetic coupling interference between adjacent electromagnetic induction sensors and realize independent liquid volume measurement of each channel. The decoupling calculation formula is:

[0015] ;

[0016] in, is the original signal vector of each electromagnetic induction sensor, is the effective signal vector after decoupling, is the N-order identity matrix, is the coupling coefficient matrix, , Interference coefficient of electromagnetic induction sensor j on electromagnetic induction sensor i.

[0017] Preferably, the optical alarm device of the alarm module includes multiple light-emitting diode indicator lights, which are respectively arranged near the location of each electromagnetic induction sensor, and each light-emitting diode indicator light corresponds to an infusion bag; when an abnormality occurs in an infusion bag, the control module controls the light-emitting diode indicator light at the corresponding position to flash or change color to indicate the location where the abnormality occurs.

[0018] Preferably, it further includes a communication module, which is connected to the control module and is used to send the remaining liquid amount data and alarm information to an external monitoring terminal or a nurse station server via a wireless network to achieve remote monitoring and data sharing.

[0019] Preferably, the monitoring terminal includes a power module, which is powered by a rechargeable battery and is provided with a charging interface or a wireless charging unit to provide power to each module of the monitoring terminal; when an external power supply is connected, the external power supply is used to power the battery, and when not connected, the battery is used to power the terminal to ensure that the monitoring terminal continues to work.

[0020] Preferably, the abnormal state includes at least one of the remaining liquid volume in the infusion bag being lower than a preset threshold, the infusion process being stopped, or the dripping rate being abnormally slowed down. When the control module detects the abnormal state, the alarm control instruction is generated.

[0021] An intelligent infusion stand management system, comprising a multi-channel infusion remaining amount monitoring terminal as described above, installed on an infusion stand;

[0022] A central monitoring device for receiving and displaying monitoring data and alarm status from the monitoring terminal;

[0023] An RFID tag is attached to each infusion bag or worn by the patient. The RFID tag stores information about the patient's identity and infusion medication and can be read by the RFID identification module of the monitoring terminal. The central monitoring device is connected to multiple monitoring terminals through network communication to centrally manage the infusion status of multiple infusion stands. When any monitoring terminal triggers an alarm, the central monitoring device simultaneously issues an alarm prompt and indicates information about the corresponding patient and infusion bag.

[0024] Preferably, the central monitoring device includes a display screen and an alarm component, which is used to graphically display the capacity value, remaining time prediction and patient identity information of each infusion bag sent by each monitoring terminal, and highlight the corresponding bed and infusion bag on the display screen interface when a monitoring terminal alarms, and send a sound or text message through the alarm component to remind the nursing staff.

[0025] Preferably, the central monitoring device is connected to the hospital information system to store each patient's remaining infusion volume, infusion start and end time, and alarm records in the patient's electronic medical record or nursing record for query and medical statistical analysis.

[0026] Beneficial effects: The multi-channel infusion remaining amount monitoring terminal and intelligent infusion stand management system provided by the present invention have the following beneficial effects:

[0027] 1. The present invention uses a single micro-terminal to simultaneously monitor the remaining fluid volume in multiple bags of infusion, eliminating the need for a separate monitoring device for each bag. This makes it ideal for use in ICUs and other settings where multiple bottles are needed per bed or multiple infusions are needed per person. This significantly improves inspection efficiency and reduces the burden on nurses. The monitoring terminal is cleverly embedded in the IV stand rails, taking up no additional space and not affecting the stand's usability or aesthetics. Functional modules such as sensors, processors, alarms, and communications are all integrated into a compact structure. Compared to external weighing modules or optoelectronic devices, the present invention is simple to install and can be directly adapted to existing IV stands.

[0028] 2. The present invention uses the principle of electromagnetic induction to monitor liquid volume, eliminating the need to modify the infusion bag or destroy the tightness of the liquid circuit. For example, by detecting the liquid weight or level change through the induction coil, the problem of the traditional drop counting method being affected by bubbles and the angle of the dropper is avoided. The entire measurement process does not contact the liquid medicine, which meets medical safety requirements and will not contaminate the liquid medicine or introduce infection risks. By combining hardware timing control and software decoupling calculation, the problem of electromagnetic interference between adjacent sensors is solved, ensuring the independence and accuracy of each measurement. Even if two adjacent infusion bags are almost hanging close together, the system can still read their liquid volumes separately, with the error within an acceptable range, thus improving the reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments or the prior art.

[0030] Figure 1 This is a structural diagram of the multi-channel infusion remaining amount monitoring terminal of the present invention when embedded in an infusion stand;

[0031] Figure 2 This is a functional block diagram of the intelligent infusion stand management system of the present invention;

[0032] In the figure: 1. Column; 2. Electromagnetic induction sensor; 3. Infusion bag; 4. RFID identification module; 5. Control module; 6. Communication module; 7. Buzzer; 8. Indicator light. DETAILED DESCRIPTION

[0033] The present invention will be described more clearly and completely below by way of a preferred embodiment in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiment.

[0034] like Figure 1 As shown, a multi-channel infusion remaining amount monitoring terminal is embedded in the column slide rail of the infusion stand, comprising:

[0035] Multiple electromagnetic induction sensors are arranged along the slide rail of the infusion stand, corresponding to the positions of multiple suspended infusion bags, and are used to sense the remaining liquid amount signal of each corresponding infusion bag; the electromagnetic induction sensor is preferably a coil and a movable magnetic core connected to the infusion bag hanging mechanism. When the weight of the infusion bag changes, the position of the magnetic core in the coil changes, thereby causing the coil induction signal to change. The control module calculates the remaining liquid weight or liquid volume of the infusion bag by detecting the change in the coil induction signal, and can detect changes in the liquid level or weight in the infusion bag without contacting the liquid.

[0036] An RFID identification module is used to read the radio frequency tag information of the infusion bag or the patient identification to obtain the patient identity and infusion information and associate it with each of the electromagnetic induction sensors;

[0037] The control module is usually composed of a single-chip microcomputer or an embedded processor, which is electrically connected to the electromagnetic induction sensor and the RFID identification module. It is used to collect the liquid amount signal of each electromagnetic induction sensor, execute a multi-channel signal isolation algorithm to process the collected signal, calculate the actual remaining liquid amount of each infusion bag, and generate an alarm control instruction when an abnormal state is detected.

[0038] The key technical aspect of this invention lies in the precise measurement and decoupling of multi-channel electromagnetic induction signals. Because multiple electromagnetic induction sensors are installed in close proximity on the same IV stand, their simultaneous operation generates electromagnetic coupling interference, causing the readings of one electromagnetic induction sensor to be contaminated by the influence of neighboring sensors. Without proper processing, the directly read signals would not accurately reflect the true condition of each IV bag.

[0039] To this end, the control module implements a multi-channel signal isolation algorithm to separate and correct the collected raw signals. The core idea of ​​the algorithm is to model the mutual interference between the electromagnetic induction sensors and extract the independent response of each sensor through a combination of hardware timing control and software calculation.

[0040] In hardware, a time-division multiplexing measurement method is used to avoid simultaneous excitation. The control module activates each electromagnetic induction sensor one by one in a high-speed loop. For example, within a measurement cycle, electromagnetic induction sensor one is first powered and its output is read. Then, the module quickly switches to energizing and reading electromagnetic induction sensor two, scanning all N sensors in turn. Since only one electromagnetic induction sensor is energized at a time, the chance of simultaneous superposition of sensing signals is greatly reduced. The driver circuits of other electromagnetic induction sensors in the unenergized state can be temporarily disconnected or placed in a high-impedance state to reduce adjacent channel induction. By properly designing the scanning frequency (for example, measuring each channel for only a few milliseconds), the measurements of each channel can be approximately synchronized, ensuring that the continuous decrease in the infusion level is not missed.

[0041] In another embodiment, each electromagnetic induction sensor can operate at a different frequency or employ different modulation codes, enabling signal differentiation in the frequency or code domain. Specifically, the control module can apply AC excitation signals of varying frequencies (e.g., f1, f2, ..., fN) to the different electromagnetic induction sensors, causing the electromagnetic induction sensor output signals to carry corresponding frequency components. By performing spectral analysis (e.g., Fast Fourier Transform (FFT)) or correlation demodulation on the mixed signal, the components within each frequency band can be extracted, corresponding to the readings of each electromagnetic induction sensor. This allows for the ability to distinguish individual channels in the received signal even when multiple electromagnetic induction sensors are excited simultaneously.

[0042] Regardless of which of the above hardware measures is used, residual coupling interference may still exist and needs to be eliminated through algorithmic calculations. The control module establishes a coupling model between the electromagnetic induction sensor channels. Generally speaking, the output of the electromagnetic induction sensor has a certain functional relationship with the actual liquid volume. However, if coupling exists, the original measurement value of the i-th electromagnetic induction sensor can be expressed as:

[0043] ;

[0044] in, represents the original measurement signal of electromagnetic induction sensor i, It represents the ideal signal generated by the electromagnetic induction sensor i corresponding to the infusion bag. is the coupling coefficient (dimensionless, ratio) of electromagnetic induction sensor i being interfered by adjacent electromagnetic induction sensor j. The above model is expressed in matrix form as ,in is the identity matrix, is the coupling coefficient matrix.

[0045] During the installation and calibration phase, the system determines the coupling coefficients through specific steps. For example, each electromagnetic induction sensor is measured in turn, with the other infusion bags empty and only containing fluid. The reading for that channel is compared with the ideal value to fit the coupling influence coefficient. Once the matrix for all channels is established, the control module software can perform decoupling operations on the raw signal vector U collected each time to solve for the actual S. For the simple case of two channels, further examples can be used to illustrate:

[0046] ,

[0047] in Indicates the interference coefficient of channel 2 to channel 1, It represents the interference coefficient of channel 1 to channel 2. According to the above equations, the actual signals of each can be solved as follows:

[0048] ,

[0049] Thus, the coupling interference can be eliminated. 、 Represents the effective sensing signal after decoupling (proportional to the liquid volume of each infusion bag), 、 is the measured original signal, 、 are all pre-calibrated constant parameters. After the above algorithm processing, the control module finally obtains the real liquid volume information of each infusion bag. For example, through experimental calibration, a corresponding relationship curve or formula between the electromagnetic induction sensor signal and the liquid volume (mL) is established, and the control module can The decoupled calculation is converted to the remaining milliliters or percentage of the corresponding infusion bag. Compared to the unprocessed raw signal, the accuracy and stability of the liquid volume value after decoupling calculation are significantly improved. Even if multiple infusion bags are hung closely on the same rack, they will not affect each other's readings.

[0050] The alarm module includes a sound alarm device and a light alarm device. The light alarm device is configured to correspond to each electromagnetic induction sensor. When the alarm control instruction of the control module is triggered, the sound alarm device emits a sound alarm, and the indicator unit corresponding to the abnormal infusion bag position in the light alarm device emits a visual alarm to locate the abnormal infusion bag.

[0051] Preferably, the optical alarm device of the alarm module includes multiple light-emitting diode indicator lights, which are respectively arranged near the location of each electromagnetic induction sensor, and each light-emitting diode indicator light corresponds to an infusion bag; when an abnormality occurs in an infusion bag, the control module controls the light-emitting diode indicator light at the corresponding position to flash or change color to indicate the location where the abnormality occurs.

[0052] In one embodiment, the monitoring terminal of the present invention further includes a communication module, connected to the control module, for transmitting remaining fluid volume data and alarm information via a wireless network to an external monitoring terminal or a nurse station server, enabling remote monitoring and data sharing. Communication can utilize a wired network interface or wireless transmission (e.g., short-range wireless communication such as Wi-Fi / Zigbee), facilitating the integration of multiple monitoring terminals into a hospital's information management platform.

[0053] In one embodiment, the monitoring terminal of the present invention further includes a power module to provide electrical energy to the monitoring terminal. The power supply method can be selected based on the usage environment: preferably, a rechargeable battery is used to ensure normal operation of the device while the IV stand is being moved, and can be charged via a standard interface. Alternatively, power can be supplied from a centralized power supply at the IV stand base or from AC power via a voltage-reduced adapter, as long as medical electrical safety regulations are met.

[0054] The present invention also provides an intelligent infusion stand management system, comprising a multi-channel infusion remaining amount monitoring terminal as described above, which is installed on an infusion stand and is used to monitor the liquid level of all infusion bags on the infusion stand and issue a local alarm. Multiple infusion stands can be used independently in a ward.

[0055] The central monitoring device receives and displays monitoring data and alarm status from the monitoring terminals. This is typically a computer or monitoring display at the nurse's station, equipped with built-in management software. Each monitoring terminal transmits real-time data to the central monitoring unit via a communication module. The central monitoring unit then aggregates and displays infusion status information for all patients. For example, the interface lists the number of infusion bags currently in each bed, the remaining milliliters in each bag, and the estimated time remaining for the infusion to be completed. If an alarm occurs at any terminal, a pop-up alert will appear on the central monitoring screen, indicating the bed number and infusion bag number, alerting medical staff to promptly address the situation.

[0056] An RFID tag is attached to each infusion bag or worn by the patient. The RFID tag stores information about the patient's identity and infusion medication and can be read by the RFID identification module of the monitoring terminal. The central monitoring device is connected to multiple monitoring terminals through network communication to centrally manage the infusion status of multiple infusion stands. When any monitoring terminal triggers an alarm, the central monitoring device simultaneously issues an alarm prompt and indicates information about the corresponding patient and infusion bag.

[0057] In one embodiment, the central monitoring device is connected to the hospital information system and can store each patient's remaining infusion volume, infusion start and end time, and alarm records in the patient's electronic medical record or nursing record through a local area network or a call system for query and medical statistical analysis.

[0058] Example 1

[0059] like Figure 1 As shown, the multi-channel infusion remaining amount monitoring terminal provided in this embodiment is installed in the column slide rail of a traditional infusion stand. The column 1 of the infusion stand is usually a hollow stainless steel round tube or square tube, which can be telescopically adjusted in height. In this embodiment, the monitoring terminal is cleverly designed as a slender strip module, the outer shell of which is embedded in the interior of the column 1 or fixed along the column groove, leaving only the necessary sensor probes and indicator lights on the outside. An electromagnetic induction sensor 2 is set at a certain distance along the length direction of the infusion stand column 1. The positions of these electromagnetic induction sensors 2 correspond to the heights of several hooks on the infusion stand for hanging infusion bags 3. When the infusion bag 3 is hung at this height by the hook, the electromagnetic induction sensor 2 is located at the bottom or adjacent to the side of the infusion bag 3. In this way, each electromagnetic induction sensor 2 is mainly controlled by its corresponding infusion bag 3, and outputs a corresponding measurement channel.

[0060] In this embodiment, the electromagnetic induction sensor 2 utilizes a microcoil + magnetic core structure to sense changes in the weight of the infusion bag 3. Specifically, each hook of the infusion stand is connected to the column via a small sliding mechanism. When the hook is pulled by gravity, it causes a magnetic core inside to slightly shift. The electromagnetic induction sensor 2, embedded in the column, detects this change in the core's position, causing a change in the coil's inductance. The coil converts this into a voltage signal through an LC oscillation or bridge circuit, which is then fed into the control module 5 for processing. As the amount of liquid in the infusion bag 3 decreases and the hook rises, the change in the magnetic core's position is proportional to the weight, and the coil's output signal also changes accordingly. Because this electromagnetic induction sensor structure utilizes the principles of spring deformation (Hooke's law) + magnetic induction to convert the weight signal into an electromagnetic signal, it enables continuous measurement of the remaining liquid volume. This entire process avoids direct contact with the liquid, and the measurement resolution can be optimized by selecting appropriate spring stiffness and coil sensitivity.

[0061] It should be noted that in addition to the weight-based approach described above, the electromagnetic induction sensor of the present invention can also adopt other equivalent forms. For example, a capacitive sensor can be used to detect changes in liquid level on the outside of an infusion bag, or a flexible sensing tag attached to the bag can be used to sense the liquid surface. However, regardless of the specific form, these sensors all operate under the principle of electromagnetic induction and are susceptible to electromagnetic interference from neighboring sensors. Therefore, the present invention utilizes a multi-channel isolation algorithm to ensure measurement accuracy.

[0062] like Figure 2As shown, the central interior of the monitoring terminal housing houses a main control circuit board, comprising a control module 5, signal conditioning circuitry, and communication module 6. The control module 5, which can be a low-power, high-performance microcontroller unit (MCU), coordinates all functions. Each electromagnetic induction sensor 2 is connected via wires to the excitation and acquisition circuits on the main control circuit board. The control module 5 controls its excitation switching and analog-to-digital conversion (ADC) sampling. The control module 5 polls each sensor channel at a set period to acquire raw data and stores it in an internal buffer.

[0063] An RFID identification module 4 is installed in an appropriate location on the monitoring terminal housing (e.g., at the top of a column or on a side convenient for card swiping). Inside, the RFID identification module antenna is located. After the nurse hangs the infusion bag, they place the bag's attached RFID tag or patient wristband close to the RFID identification module 4. The RFID identification module automatically reads the patient ID, medication information, and other data. Upon receiving the read information, the control module 5 associates it with the currently connected channel, allowing subsequent fluid volume data measured for that channel to be stored in association with the corresponding patient and medication. The RFID identification module utilizes high-frequency 13.56MHz technology with a read range of several centimeters, ensuring that only target tags are read at close range, avoiding confusion with tags on adjacent beds. The reading process takes less than one second. Upon successful reading, the control module 5 will indicate the identity binding is complete by sounding a buzzer 7 or flashing an indicator light 8.

[0064] Example 2

[0065] This embodiment describes in detail the signal processing flow and alarm triggering mechanism of the monitoring terminal. Figure 2 As shown, the control module 5 performs decoupling calculation on the multi-channel sensor data. The coupling coefficient matrix obtained by installation calibration is Based on the above, the software program of the control module implements the multi-channel signal isolation algorithm. After the ADC is collected, the program immediately performs matrix operations , get the independent signal after eliminating interference The matrix inversion can be pre-calculated using an efficient algorithm (for a fixed matrix), so real-time calculations will not take up too much CPU time. The control module further applies the calibration curve of the electromagnetic induction sensor to convert it into the remaining capacity of the corresponding infusion bag (for example, in milliliters). This process can be completed by looking up a table or calculating with a formula. For example, the control module stores the linear approximation formula for each electromagnetic induction sensor: ,in and is the calibration slope and bias of electromagnetic induction sensor i, To calculate the liquid volume (mL), the signs of each have been determined during the calibration process. Through the above linear relationship or a more complex nonlinear correction model, the system finally obtains the remaining liquid volume in milliliters.

[0066] when When the volume falls below a preset alarm threshold (e.g., 50 mL remaining or the volume calculated based on the remaining 5 minutes of infusion time), the control module deems the infusion in that channel to be nearly depleted and identifies an abnormal state. At this point, control module 5 generates an alarm trigger signal, immediately activating the alarm module. First, buzzer 7 emits a rapid beep to attract the attention of patrol personnel. Simultaneously, indicator light 8 corresponding to the abnormal channel begins flashing rapidly (while the indicators for other channels remain off or permanently lit). Because each electromagnetic induction sensor channel is physically adjacent to its corresponding infusion bag, the flashing indicator light allows medical staff to easily identify which bag of infusion needs to be replaced, eliminating the need to check the liquid level in each bag, significantly saving time. At night, when the ward is quieter, the buzzer volume can be lowered, with only the indicator light providing reminders to minimize disruption to the patient's rest.

[0067] In addition to the near empty condition, the system can also detect other anomalies. For example, if a channel If the value does not decrease for a period of time, it indicates that the dripping may have stopped (e.g., due to a change in the patient's limb position causing a drip blockage), and the control module may also determine that the dripping has stopped abnormally, triggering an alarm. Furthermore, the control module can use data from multiple electromagnetic induction sensors to perform trend predictions: based on the rate of drop in the liquid volume in each channel, it estimates the expected end time of each infusion. If two infusions are found to end at approximately the same time and there may be a shortage of nurses, the system can issue a preemptive reminder and recommend that one of the infusions be replaced first to stagger the completion time and ensure quality of care.

[0068] Example 3

[0069] This embodiment illustrates the networking and central monitoring functions of an intelligent IV stand management system. Multiple monitoring terminals, such as those described in Example 1, are deployed in a single ward. Each terminal communicates wirelessly with a central monitoring computer at the nurses' station. Communication module 6 uses Wi-Fi to access the hospital's internal network and regularly reports data and status. The central monitoring computer runs supporting software, which creates a monitoring panel for each bed, displaying real-time infusion information sent by the bed's monitoring terminal.

[0070] In practice, nurses assign newly admitted patients a smart IV stand equipped with a monitoring terminal and bind the patient's wristband RFID tag to the monitoring terminal. From then on, all infusion data for that patient is aggregated to the corresponding bed number on the central monitoring computer at the nurses' station. The nurses' station screen displays information such as: "Bed: Bed 10, Zhang; Infusion 1: 5% glucose 500mL, 120mL remaining (approximately 10 minutes); Infusion 2: Normal saline 250mL, 200mL remaining (approximately 40 minutes)." If the remaining level of a particular medication bag falls below a threshold, the corresponding item will flash and emit a beeping sound. Clicking on the item reveals detailed information such as the medication name, infusion start time, and entered dose, making it easier for nurses to keep records.

[0071] When a local alarm is triggered on a monitoring terminal, the central monitoring software immediately displays an alert window accompanied by audio and visual notifications, which are linked to the terminal's buzzer and indicator light (a time delay can be set to prevent repeated alarms). After confirmation, the nurse can go to the bed number for on-site treatment. After the treatment is complete and a new fluid bag is replaced, the RFID card is swiped again to update the information. The system then overwrites the old record with the new bag information and continues monitoring. All of this process is electronically recorded.

[0072] The system can also be integrated with the hospital's information system, for example, automatically recording infusion monitoring data into nursing records or connecting with the pharmacy department to track the department's medication consumption rate. Open interfaces allow for excellent scalability. For example, future integration with wireless infusion pumps or intelligent infusion warming equipment will enable more comprehensive closed-loop infusion management.

[0073] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A multi-channel infusion remaining amount monitoring terminal, characterized in that: Embedded in the column slide rail of the infusion stand, including: Multiple electromagnetic induction sensors are arranged along the slide rails of the infusion stand, corresponding to the positions of multiple suspended infusion bags, and are used to sense the remaining liquid amount signal of each corresponding infusion bag; An RFID identification module is used to read the radio frequency tag information of the infusion bag or the patient identification to obtain the patient identity and infusion information and associate it with each of the electromagnetic induction sensors; a control module electrically connected to the electromagnetic induction sensors and the RFID identification module, configured to collect liquid quantity signals from the electromagnetic induction sensors, execute a multi-channel signal isolation algorithm to process the collected signals, calculate the actual remaining liquid volume of each infusion bag, and generate an alarm control instruction when an abnormal state is detected; The alarm module includes a sound alarm device and a light alarm device. The light alarm device is configured to correspond to each electromagnetic induction sensor. When the alarm control instruction of the control module is triggered, the sound alarm device emits a sound alarm, and the indicator unit corresponding to the abnormal infusion bag position in the light alarm device emits a visual alarm to locate the abnormal infusion bag.

2. A multi-channel infusion remaining amount monitoring terminal according to claim 1, characterized in that: The electromagnetic induction sensor includes a coil and a movable magnetic core connected to the infusion bag suspension mechanism. When the weight of the infusion bag changes, the position of the magnetic core in the coil changes, thereby causing the coil induction signal to change. The control module calculates the remaining liquid weight or liquid volume of the infusion bag by detecting the change in the coil induction signal.

3. The multi-channel infusion remaining amount monitoring terminal according to claim 1, characterized in that: The control module sequentially stimulates each electromagnetic induction sensor to collect signals and performs decoupling calculations on the signals collected by different electromagnetic induction sensors to eliminate electromagnetic coupling interference between adjacent electromagnetic induction sensors and achieve independent liquid volume measurement in each channel. The decoupling calculation formula is: ； in, is the original signal vector of each electromagnetic induction sensor, is the effective signal vector after decoupling, is the N-order identity matrix, is the coupling coefficient matrix, , Interference coefficient of electromagnetic induction sensor j on electromagnetic induction sensor i.

4. The multi-channel infusion remaining amount monitoring terminal according to claim 1, characterized in that: The optical alarm device of the alarm module includes multiple light-emitting diode indicator lights, which are respectively arranged near the location of each electromagnetic induction sensor, and each light-emitting diode indicator light corresponds to an infusion bag; when an abnormality occurs in an infusion bag, the control module controls the light-emitting diode indicator light at the corresponding position to flash or change color to indicate the location where the abnormality occurs.

5. The multi-channel infusion remaining amount monitoring terminal according to claim 1, characterized in that: It also includes a communication module, which is connected to the control module and is used to send the remaining liquid amount data and alarm information to an external monitoring terminal or a nurse station server through a wireless network to achieve remote monitoring and data sharing.

6. The multi-channel infusion remaining amount monitoring terminal according to claim 1, characterized in that: The monitoring terminal includes a power supply module, which is powered by a rechargeable battery and is provided with a charging interface or a wireless charging unit to provide power to each module of the monitoring terminal; when an external power supply is connected, the external power supply is used to power the battery, and when not connected, the battery is used to power the terminal to ensure that the monitoring terminal continues to work.

7. The multi-channel infusion remaining amount monitoring terminal according to claim 1, characterized in that: The abnormal state includes at least one of the remaining liquid volume in the infusion bag being lower than a preset threshold, the infusion process being stopped, or the dripping rate being abnormally slowed down. When the control module detects the abnormal state, the alarm control instruction is generated.

8. An intelligent infusion stand management system, characterized in that: A multi-channel infusion remaining amount monitoring terminal according to any one of claims 1 to 7, mounted on an infusion stand; A central monitoring device for receiving and displaying monitoring data and alarm status from the monitoring terminal; An RFID tag is attached to each infusion bag or worn by the patient. The RFID tag stores information about the patient's identity and infusion medication and can be read by the RFID identification module of the monitoring terminal. The central monitoring device is connected to multiple monitoring terminals through network communication to centrally manage the infusion status of multiple infusion stands. When any monitoring terminal triggers an alarm, the central monitoring device simultaneously issues an alarm prompt and indicates information about the corresponding patient and infusion bag.

9. The intelligent infusion stand management system according to claim 8, characterized in that: The central monitoring device includes a display screen and an alarm component, which is used to graphically display the capacity value, remaining time prediction and patient identity information of each infusion bag sent by each monitoring terminal, and highlight the corresponding bed and infusion bag on the display screen interface when a monitoring terminal alarms, and send a sound or text message through the alarm component to remind the nursing staff.

10. The intelligent infusion stand management system according to claim 8, characterized in that: The central monitoring device is connected to the hospital information system to store each patient's remaining infusion volume, infusion start and end time, and alarm records in the patient's electronic medical record or nursing record for query and medical statistical analysis.

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