Multi-channel infusion balance monitoring terminal and intelligent infusion stand management system

Abstract

This invention discloses a multi-channel infusion volume monitoring terminal and an intelligent infusion stand management system. The monitoring terminal integrates multiple sets of electromagnetic induction sensors to simultaneously detect the remaining fluid volume of multiple infusion bags, and combines this with an RFID identification module to automatically identify patient information. The control module within the terminal executes a multi-channel isolation algorithm on the sensor signals to eliminate electromagnetic interference between adjacent channels and accurately calculate the remaining volume of each infusion bag. When a bag of fluid is nearly empty or the infusion is abnormally interrupted, the terminal's audible and visual alarm module immediately triggers an alarm and locates the abnormal infusion bag via a corresponding indicator light. Simultaneously, the terminal can transmit monitoring data and alarm information to the central monitoring device at the nurse station via a wireless network, enabling centralized real-time management of multiple patient infusions. This invention improves the automation and safety of batch infusion monitoring, reduces nurses' workload, and has advantages such as compact structure, accurate monitoring, and wide applicability.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a multi-channel infusion volume monitoring terminal and an intelligent infusion stand management system. Background Technology

[0002] In hospital ICUs and similar settings, multiple patients often receive intravenous infusions simultaneously. Traditional infusion monitoring relies mainly on nurses manually checking the fluid level or drip rate in the IV bag and manually changing the bag when the fluid is almost finished. If nurses fail to notice in time that the infusion is about to end, air may enter the IV tubing, posing a risk. Especially in the ICU, each patient often has multiple IV bags attached simultaneously, requiring nurses to make frequent rounds, resulting in a heavy workload and a high risk of oversight.

[0003] Existing technologies include several devices for monitoring infusion status. For example, some systems estimate the remaining fluid volume by measuring the weight of the infusion bag using a weighing sensor installed at the infusion stand hook, and then transmit the data to the nurses' station via wired or wireless means. While this method allows for real-time monitoring, each infusion bag requires a separate weighing device, resulting in complex wiring and high costs. In addition, infrared drip rate sensors are used to monitor infusion rate or drop count; the remaining fluid volume can be estimated by accumulating the number of drops, but the relationship between the drop count and the actual volume is not strictly linear, and different medications have different drop coefficients, leading to significant calculation errors. Furthermore, in multi-channel systems, the close mounting of multiple optical sensors can cause signal crosstalk, reducing monitoring reliability.

[0004] Another type of method is capacitive or electromagnetic induction sensing. For example, a capacitive sensor is attached to the outside of the infusion tube to detect the presence of liquid inside and filter out interference. However, capacitive sensors are susceptible to environmental humidity and the influence of nearby conductors, making it difficult to accurately monitor multiple infusions simultaneously. Electromagnetic induction sensors determine the liquid level or flow rate by detecting changes in the magnetic field. For example, some existing technologies incorporate a float and sensing element inside the infusion bottle, triggering an alarm when the liquid level drops to a predetermined position. However, such devices typically only determine whether a single bag of infusion is empty, cannot continuously read the remaining volume, and cannot monitor multiple bags of infusion simultaneously.

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

[0006] Technical Objective: To address the shortcomings of existing technologies, this invention discloses a multi-channel infusion volume monitoring terminal and an intelligent infusion stand management system. It uses multi-channel electromagnetic induction technology to measure the remaining fluid volume of multiple infusion bags in real time, and combines patient identification 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 volume monitoring terminal, embedded in the column slide rail of an infusion stand, includes:

[0009] Multiple electromagnetic induction sensors are arranged along the slide rail of the infusion stand, each corresponding to a position of a multiple suspended infusion bag, and are used to sense the remaining liquid volume signal of each corresponding infusion bag;

[0010] The RFID identification module is used to read the radio frequency tag information of the infusion bag or patient identification to obtain the patient's identity and infusion information and associate them with each of the electromagnetic induction sensors.

[0011] The control module is electrically connected to the electromagnetic induction sensor and the RFID identification module. It is used to collect the liquid volume signals of each electromagnetic induction sensor, and to process the collected signals by executing a multi-channel signal isolation algorithm to calculate the actual remaining liquid volume of each infusion bag. When an abnormal state is detected, an alarm control command is generated.

[0012] The alarm module includes an audible alarm device and a visual alarm device. The visual alarm device is configured to correspond to each electromagnetic induction sensor. When the alarm control command of the control module is triggered, the audible alarm device emits an audible alarm, and the indicator unit in the visual alarm device corresponding to the abnormal infusion bag position emits a visual warning 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 a change in the coil induction signal. The control module calculates the remaining liquid weight or volume of the infusion bag by detecting the change in the coil induction signal.

[0014] Preferably, the control module sequentially excites each electromagnetic induction sensor to acquire signals, and performs decoupling calculations on the signals acquired by different electromagnetic induction sensors to eliminate electromagnetic coupling interference between adjacent electromagnetic induction sensors, thereby achieving independent liquid volume measurement for each channel. The decoupling calculation formula is as follows:

[0015] ;

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

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

[0018] Preferably, it also includes a communication module, which is connected to the control module and is used to send the remaining fluid volume data and alarm information to an external monitoring terminal or 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 equipped with a charging interface or a wireless charging unit to provide power to each module of the monitoring terminal; when an external power source is connected, the external power source powers and charges the battery, and when no external power source is connected, the battery powers the terminal to ensure continuous operation.

[0020] Preferably, the abnormal state includes at least one of the following: the remaining fluid volume in the infusion bag is lower than a preset threshold, the infusion process stops, or the drip rate slows down abnormally. When the control module detects the abnormal state, it generates the alarm control command.

[0021] An intelligent infusion stand management system includes a multi-channel infusion volume monitoring terminal as described above, which is installed on the infusion stand.

[0022] A central monitoring device is used to receive and display monitoring data and alarm status from the monitoring terminal;

[0023] RFID tags are attached to each infusion bag or worn by the patient. The RFID tags store information about the patient's identity and the 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 via 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 the information of the corresponding patient and infusion bag.

[0024] Preferably, the central monitoring device includes a display screen and an alarm component, which graphically displays the capacity value, remaining time prediction, and patient identity information of each infusion bag sent by each monitoring terminal, and highlights the corresponding bed and infusion bag on the display screen when a monitoring terminal alarms, and issues an audio or text message reminder to nursing staff through the alarm component.

[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 querying and medical statistical analysis.

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

[0027] 1. This invention allows for simultaneous monitoring of the remaining fluid volume in multiple IV bags using a single miniature terminal, eliminating the need for a separate monitoring device for each bag. This makes it ideal for scenarios like ICUs where multiple IV bags are used per bed or one patient requires multiple infusion lines, significantly improving inspection efficiency and reducing nurses' workload. Furthermore, the monitoring terminal is cleverly integrated into the IV stand's sliding rail, occupying no extra space and not affecting the stand's usability or aesthetics. Sensors, processors, alarms, and communication modules are all integrated into a compact structure. Compared to external weighing modules or photoelectric devices, this invention is easier to install and can directly upgrade existing IV stands.

[0028] 2. This invention uses electromagnetic induction to monitor fluid volume, eliminating the need to modify infusion bags or compromise the airtightness of the fluid path. For example, it detects changes in fluid weight or level through an induction coil, avoiding the problems of air bubbles and dropper angle that affect traditional drop counting methods. The entire measurement process does not involve contact with the medication, meeting medical safety requirements and preventing contamination or infection risks. By combining hardware timing control with software decoupling calculations, 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 touching and suspended, the system can still read their fluid volumes separately with an acceptable error range, improving the system's reliability. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0030] Figure 1 This is a schematic diagram of the structure of the multi-channel infusion volume monitoring terminal of the present invention when it is 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 diagram: 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 Implementation

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

[0034] like Figure 1 As shown, a multi-channel infusion balance monitoring terminal, embedded in the column slide rail of an infusion stand, includes:

[0035] Multiple electromagnetic induction sensors are arranged along the slide rail of the infusion stand, each corresponding to a different position of a suspended infusion bag, to sense the remaining liquid volume signal of each corresponding infusion bag. The electromagnetic induction sensor is preferably 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 a change in the coil's induction signal. The control module calculates the remaining liquid weight or volume of the infusion bag by detecting the change in the coil's induction signal, enabling the detection of changes in the liquid level or weight inside the infusion bag without contact with the liquid.

[0036] The RFID identification module is used to read the radio frequency tag information of the infusion bag or patient identification to obtain the patient's identity and infusion information and associate them with each of the electromagnetic induction sensors.

[0037] The control module, typically composed of a microcontroller or embedded processor, is electrically connected to the electromagnetic induction sensor and the RFID identification module. It is used to collect the liquid volume signals from each electromagnetic induction sensor, 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 command when an abnormal state is detected.

[0038] The key technology of this invention lies in the accurate measurement and decoupling processing of multi-channel electromagnetic induction signals. Because multiple electromagnetic induction sensors are installed on the same infusion stand and are close to each other, electromagnetic coupling interference occurs when they operate simultaneously. This causes the reading of one electromagnetic induction sensor to be influenced by the neighboring sensors. Without processing, the directly read signals cannot accurately reflect the true condition of each infusion bag.

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

[0040] In terms of 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 measurement: for example, within one measurement cycle, electromagnetic induction sensor one is first powered and its output is read, then the system quickly switches to electromagnetic induction sensor two for excitation and reading, and so on, scanning all N sensors in turn. Since only one electromagnetic induction sensor is in an active state at any given time, the chance of simultaneous superposition of induction signals is greatly reduced. The drive circuits of other electromagnetic induction sensors in the non-excitation state can be temporarily disconnected or put into a high-impedance state to reduce adjacent channel induction. By reasonably designing the scanning frequency (e.g., the measurement time per channel is only a few milliseconds), it can be approximately assumed that the measurements of each channel are synchronous, and information about the continuous drop in infusion fluid level will not be missed.

[0041] In another embodiment, the electromagnetic induction sensors can operate at different frequencies or employ different modulation codes to distinguish signals using either the frequency domain or the code domain. Specifically, the control module can apply AC excitation signals (e.g., f1, f2, ..., fN) of different frequencies to the different electromagnetic induction sensors, and the output signals of the electromagnetic induction sensors will also carry corresponding frequency components. By performing spectral analysis (e.g., Fast Fourier Transform, FFT) or correlation demodulation on the mixed signal, the components in each frequency band can be extracted, corresponding to the readings of each electromagnetic induction sensor. In this way, even if multiple electromagnetic induction sensors are excited simultaneously, it is still possible to distinguish their respective channels in the received signal.

[0042] Regardless of which hardware measures are 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, the output of the electromagnetic induction sensor has a certain functional relationship with the actual liquid volume, but if coupling exists, the original measurement value of the i-th electromagnetic induction sensor can be expressed as:

[0043] ;

[0044] in, This represents the original measurement signal of electromagnetic induction sensor i. This represents an ideal signal generated solely by the electromagnetic induction sensor i corresponding to the infusion bag. Let be the coupling coefficient (dimensionless, ratio) of electromagnetic induction sensor i affected by interference from its neighboring electromagnetic induction sensor j. The above model can be expressed in matrix form as follows: ,in It is the identity matrix. This is the coupling coefficient matrix.

[0045] During the installation and calibration phase, the system measures each coupling coefficient through specific steps. The value of . For example, let each electromagnetic induction sensor measure under the condition that other infusion bags are empty and only the bag is filled with liquid, and compare the reading of the channel with the ideal value to fit the coupling effect coefficient. After the matrix of all channels is established, the software of the control module can perform decoupling operation on the raw signal vector U of each acquisition and solve for the actual S. For the simple case of two channels, further examples can be given:

[0046] ,

[0047] in This represents the interference coefficient of channel 2 on channel 1. This represents the interference coefficient of channel 1 to channel 2. Based on the above equations, the actual signals for each channel can be calculated as follows:

[0048] ,

[0049] This eliminates coupling interference. Among other things, , This represents the effective sensing signal after decoupling (proportional to the volume of each infusion bag). , The original signal obtained, , All parameters are pre-calibrated constants. After processing by the above algorithm, the control module finally obtains the actual fluid volume information for each infusion bag. For example, by establishing a curve or formula relating the electromagnetic induction sensor signal to the fluid volume (mL) through experimental calibration, the control module can... This 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 decoupled calculation of the fluid volume value are significantly improved, and the readings will not be affected even if multiple infusion bags are tightly suspended on the same stand.

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

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

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

[0053] In one embodiment, the monitoring terminal of the present invention further includes a power module to provide power to the monitoring terminal. The power supply method can be selected according to the usage environment: preferably, a rechargeable battery is used to ensure the normal operation of the device when the infusion stand is moved, and it can be charged through a standard interface; alternatively, it can be powered by the centralized power supply of the infusion stand base or by using AC power through an adapter to step down the voltage, as long as it meets the medical electrical safety specifications.

[0054] The present invention also provides an intelligent infusion stand management system, including a multi-channel infusion volume monitoring terminal as described above, which is installed on the infusion stand for monitoring the volume of all infusion bags on the infusion stand and triggering a local alarm. Multiple infusion stands can be used independently in the ward.

[0055] A central monitoring device is used to receive and display monitoring data and alarm status from the monitoring terminals; it is typically a computer or monitoring display screen at the nurses' station with built-in management software. Each monitoring terminal transmits real-time data to the central monitoring unit via a communication module, and the central monitoring unit aggregates and displays the infusion status information for all patients. For example, the interface can list how many bags of IV fluid are currently being infused for each patient, how many milliliters remain in each bag, and how long the infusion is expected to last. When any terminal triggers an alarm, the central monitoring screen will display a warning and indicate the bed number and IV bag number to remind medical staff to handle the situation promptly.

[0056] RFID tags are attached to each infusion bag or worn by the patient. The RFID tags store information about the patient's identity and the 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 via 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 the information of the corresponding patient and infusion bag.

[0057] In one embodiment, the central monitoring device interfaces with 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 via a local area network or call system for querying and medical statistical analysis.

[0058] Example 1

[0059] like Figure 1 As shown, the multi-channel infusion volume monitoring terminal provided in this embodiment is installed within the column rail of a traditional infusion stand. The infusion stand column 1 is typically a hollow stainless steel round or square tube, with adjustable height. In this embodiment, the monitoring terminal is cleverly designed as a slender strip module, with its outer shell embedded inside the column 1 or fixed along the column groove, leaving only the necessary sensor probes and indicator lights exposed on the outside. An electromagnetic induction sensor 2 is installed at regular intervals along the length 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 where the infusion bags 3 are suspended. When the infusion bag 3 is suspended at this height via the hooks, the electromagnetic induction sensor 2 is located precisely at the bottom or side of the infusion bag 3. Thus, each electromagnetic induction sensor 2 is primarily controlled by its corresponding infusion bag 3, corresponding to one measurement channel output.

[0060] In this embodiment, the electromagnetic induction sensor 2 employs a miniature coil + 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 slight displacement of an internal magnetic core. The electromagnetic induction sensor 2, embedded in the column, detects this change in the magnetic core's position, causing a change in the coil inductance. The coil converts this into a voltage signal output through an LC oscillation or bridge circuit, which is then sent to the control module 5 for processing. As the liquid in the infusion bag 3 gradually decreases, the hook rises, and the change in the magnetic core's position is proportional to the weight, causing a corresponding change in the coil output signal. 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, continuous measurement of the remaining liquid volume is achieved. The entire process does not directly contact 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 this invention can also take other equivalent forms. For example, a capacitive sensor can be used to detect changes in liquid level outside the infusion bag, or a flexible inductive tag attached to the infusion bag can be used to sense the liquid level. However, regardless of the specific form, these sensors operate on the principle of electromagnetic induction and are susceptible to electromagnetic interference from neighboring sensors. Therefore, this invention employs a multi-channel isolation algorithm to ensure measurement accuracy.

[0062] like Figure 2As shown, the main control circuit board is installed in the center of the monitoring terminal's housing, including a control module 5, a signal conditioning circuit, and a communication module 6. The control module 5 can be a low-power, high-performance microcontroller unit (MCU) responsible for coordinating all functions. Each electromagnetic induction sensor 2 is connected to the excitation and acquisition circuit on the main control circuit board via leads, and its excitation switch and analog-to-digital converter (ADC) sampling are controlled by the control module 5. The control module 5 polls each sensor channel according to a set period to acquire raw data and stores it in an internal buffer.

[0063] An RFID identification module 4 is installed at an appropriate location on the monitoring terminal housing (e.g., the top of the column or a side convenient for card swiping), containing an RFID identification module antenna. After the nurse hangs the IV bag, they bring the RFID tag attached to the IV bag or the patient's 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 this information with the currently connected channel, linking the subsequent fluid volume data measured by that channel with the corresponding patient and medication for storage. The RFID identification module uses high-frequency 13.56MHz technology with a reading distance of several centimeters, ensuring that only nearby target tags are read to avoid confusion with tags from adjacent beds. The reading process takes less than one second. Upon successful reading, the control module 5 will sound a buzzer 7 or flash an indicator light 8 to indicate that the identity binding is complete.

[0064] Example 2

[0065] This embodiment details the signal processing flow and alarm triggering mechanism of the monitoring terminal. For example... Figure 2 As shown, control module 5 performs decoupling calculations on multi-channel sensor data. The coupling coefficient matrix obtained from installation calibration is used as an example. Based on this, the control module's software program implements the aforementioned multi-channel signal isolation algorithm. Whenever a new batch of sensor data arrives from each channel... After acquisition via ADC, the program immediately performs matrix operations. To obtain the independent signal after interference elimination The inversion of this matrix can be pre-computed using an efficient algorithm (for a fixed matrix). (matrix), therefore real-time computation will not consume too much CPU time. For the obtained... The control module further applies the calibration curve of the electromagnetic induction sensor to convert it into the remaining volume of the corresponding infusion bag (e.g., in milliliters, mL). This process can be completed by looking up a table or calculating using a formula. For example, the control module stores a linear approximation formula for each type of electromagnetic induction sensor: ,in and For the calibration slope and bias of electromagnetic induction sensor i, The symbols for the calculated liquid volume (mL) have been determined during the calibration process. Using the above linear relationship or a more complex nonlinear correction model, the system ultimately yields the remaining liquid volume in milliliters.

[0066] when When the volume falls below a preset alarm threshold (e.g., 50mL remaining or the volume calculated based on 5 minutes of remaining infusion time), the control module considers the infusion in that channel to be running out of fluid and determines it as an abnormal state. At this time, 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 patrolling personnel; simultaneously, indicator light 8 corresponding to the abnormal channel begins to flash rapidly (while indicator lights for other channels remain off or constantly lit for distinction). Since each electromagnetic induction sensor channel is physically adjacent to its corresponding infusion bag, the flashing indicator lights allow medical staff to easily identify which bag needs changing, eliminating the need to check the fluid level of each bag and significantly saving time. In quieter wards at night, the buzzer volume can be reduced, with only indicator lights providing the alert, minimizing disturbance to patients' rest.

[0067] Besides detecting when the liquid level is about to run out, the system can also detect other anomalies. For example, if a channel... If the value shows no decrease over a period of time, it indicates that the drip may have stopped (e.g., a change in patient limb position causing drip blockage), and the control module can also determine this as an abnormal drip stoppage, triggering an alarm. Furthermore, the control module can utilize data from multiple electromagnetic induction sensors for trend prediction: based on the rate of decrease in fluid volume at each channel, it estimates the expected end time of each infusion. If it is detected that two infusions are ending almost simultaneously and there may be a shortage of nurses, the system can issue an advance warning, suggesting that one of the infusions be switched to avoid peak completion and ensure quality nursing care.

[0068] Example 3

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

[0070] In practice, nurses assign a smart IV stand with a monitoring terminal to newly admitted patients, binding the patient's RFID wristband to the monitoring terminal. From then on, all infusion data for that patient is collected at 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 XX; Infusion 1: 5% glucose 500mL, 120mL remaining (approximately 10 minutes); Infusion 2: Normal saline 250mL, 200mL remaining (approximately 40 minutes)." If the remaining volume of a particular IV bag falls below a threshold, its corresponding item will flash and emit a beeping sound. Clicking on that item reveals detailed information such as the medication name, start time of infusion, and entered dosage, facilitating record-keeping by nurses.

[0071] When a local alarm is triggered on the monitoring terminal, the central monitoring software will immediately display an alert window accompanied by an audible and visual reminder, which will be synchronized with the terminal's buzzer and indicator light (a delay can be set between them to avoid repeated alarms). After confirmation, the nurse can proceed to the scene according to the bed number. After the procedure is completed and a new IV bag is replaced, the information is updated again by swiping the RFID card. The system will then overwrite the old record with the new IV bag information and continue monitoring. All of these processes are electronically recorded.

[0072] Furthermore, this system can be integrated with the hospital's information system, for example, automatically writing infusion monitoring data into nursing records, or connecting to the pharmacy department to track the rate of medication consumption. Through open interfaces, the system offers good scalability. For instance, in the future, it can be connected to wireless infusion pumps or intelligent infusion warming devices to achieve more comprehensive closed-loop management of infusions.

[0073] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A multi-channel infusion residual volume monitoring terminal, characterized by, Embedded in the column slide rail of the infusion support, comprising: a plurality of electromagnetic induction sensors arranged along the slide rail of the infusion support, respectively corresponding to a plurality of positions of the suspended infusion bags, for sensing the residual liquid volume signals of the corresponding infusion bags; an RFID identification module for reading the radio frequency tag information of the infusion bags or the patient identification, so as to obtain the patient identity and the infusion information and associate them with each of the electromagnetic induction sensors; a control module electrically connected with the electromagnetic induction sensors and the RFID identification module, for collecting the liquid volume signals of each electromagnetic induction sensor, and performing a multi-channel signal isolation algorithm to process the collected signals, and calculating the actual residual liquid volume of each of the infusion bags, and generating an alarm control instruction when an abnormal state is detected; an alarm module including a sound alarm device and a light alarm device, the light alarm device is arranged to correspond to each electromagnetic induction sensor, when the alarm control instruction of the control module is triggered, the sound alarm device issues a sound alarm, and the indication unit of the light alarm device corresponding to the abnormal infusion bag position issues a visual warning to locate the abnormal infusion bag; 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 the electromagnetic coupling interference between adjacent electromagnetic induction sensors, so as to realize independent liquid volume measurement of each channel, and the formula of the decoupling calculation is: ； wherein is the original signal vector of the electromagnetic induction sensor i, is the decoupled effective signal vector of the electromagnetic induction sensor i, is the N-order identity matrix, is the coupling coefficient matrix, , is the interference coefficient of the electromagnetic induction sensor j to the electromagnetic induction sensor i.

2. The multi-channel infusion residual volume monitoring terminal according to claim 1, characterized in that, the electromagnetic induction sensor includes a coil and a movable magnetic core connected with 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 change of the coil induction signal, and the control module calculates the residual liquid weight or volume of the infusion bag by detecting the change of the coil induction signal.

3. The multi-channel infusion residual volume monitoring terminal according to claim 1, characterized in that, The light alarm device of the alarm module includes a plurality of light-emitting diode indicator lights arranged near each electromagnetic induction sensor position, and each light-emitting diode indicator light corresponds to an infusion bag; when an abnormality occurs in a certain infusion bag, the control module controls the light-emitting diode indicator light at the corresponding position to flash or change color to indicate the position of the abnormality.

4. The multi-channel infusion residual volume monitoring terminal according to claim 1, characterized in that, It also includes a communication module connected with the control module, for sending the residual liquid volume data and alarm information to an external monitoring terminal or a nurse station server through a wireless network to realize remote monitoring and data sharing.

5. The multi-channel infusion residual volume monitoring terminal according to claim 1, characterized in that, The monitoring terminal includes a power module, the power module is powered by a rechargeable battery, and is provided with a charging interface or a wireless charging unit to provide power for each module of the monitoring terminal; when an external power source is connected, the external power source supplies power and charges the battery, and when the external power source is not connected, the battery supplies power to ensure the continuous work of the monitoring terminal.

6. The multi-channel infusion residual volume monitoring terminal according to claim 1, characterized in that, The abnormal state includes at least one of the residual liquid volume of the infusion bag being lower than a preset threshold, the infusion process stopping or the drop speed abnormally slowing down, and the alarm control instruction is generated when the control module detects the abnormal state.

7. An intelligent infusion stand management system characterized in that, It includes a multi-channel infusion residual volume monitoring terminal as claimed in any one of claims 1-6, installed on the infusion support; a central monitoring device for receiving and displaying the monitoring data and alarm state from the monitoring terminal; An RFID tag is attached to each infusion bag or worn by the patient, which stores the patient's identity and infusion drug information 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 synchronously issues an alarm prompt and indicates the corresponding patient and infusion bag information.

8. The intelligent infusion stand management system of claim 7, wherein, The central monitoring device includes a display screen and a warning component for graphically displaying the volume value, remaining time prediction, and patient identity information of each infusion bag sent by each monitoring terminal. When an alarm is triggered by a certain monitoring terminal, the corresponding bed and infusion bag are highlighted on the display screen interface, and the warning component issues a sound or a short message to remind the nursing staff.

9. The intelligent infusion stand management system of claim 7, wherein, The central monitoring device is connected to the hospital information system, and the remaining amount of each patient's infusion, the start and end time of infusion, and the alarm record are stored in the patient's electronic medical record or nursing record for query and medical statistical analysis.

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