Quantitative intravenous drug liquid discarding control device and method based on weight feedback
By using a weight-feedback-based intravenous drug quantitative disposal control device, the weight of the drug container is monitored and compared in real time, solving the problems of inefficiency and error in the disposal operation of the prior art, and achieving high-precision and safe disposal control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-23
- Publication Date
- 2026-03-27
AI Technical Summary
In the current process of preparing intravenous medications, the disposal of waste liquid relies on manual estimation, which is inefficient, labor-intensive, prone to human error, and cannot achieve high-precision and repeatable quantitative control. In particular, it is difficult to accurately control the amount of waste liquid when there are soft containers and differences in drug solution density.
A weight-feedback-based intravenous drug quantitative disposal control device is adopted. The device monitors the weight change of the drug container in real time through a weighing sensor, and performs dynamic comparison and audible and visual prompts in combination with the main control circuit module to achieve precise control and real-time prompts of the disposal volume.
It improves the accuracy and safety of waste disposal operations, reduces the risk of human error, and achieves high-precision and consistent control of waste volume, making it suitable for various intravenous medication scenarios.
Smart Images
Figure CN121731133A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical medication preparation and intravenous medication operation assistance technology, and particularly to a quantitative disposal control device and method for intravenous drugs based on real-time weight feedback. This invention is applicable to intravenous medication preparation centers (PIVAS), outpatient chemotherapy rooms, and other intravenous medication preparation scenarios, and is used to quantitatively control the disposal of medication solutions in intravenous drug containers according to clinical medication needs during intravenous drug preparation or related operations. Background Technology
[0002] With the increasing demands for personalized and precise medication in clinical treatment, the dosage of intravenous medications during preparation and administration often needs to be adjusted according to the patient's specific treatment plan, rather than being limited to the standard size of the infusion bag. Therefore, in practice, healthcare professionals often need to discard a portion of the medication from the original intravenous medication container to obtain the target dosage for subsequent medication administration.
[0003] Current clinical fluid disposal procedures mainly rely on manual estimation, including relying on container markings, visually estimating the fluid level, repeatedly using syringes to draw fluid, or controlling the amount of fluid to be disposed of based on experience. However, since intravenous drug containers are mostly soft containers, they deform significantly during the disposal process, and the relationship between the fluid level and the actual volume is not linear, making it easy for the markings to deviate significantly. At the same time, repeated drawing operations are inefficient, labor-intensive, and prone to human error, posing a risk of insufficient or excessive fluid disposal.
[0004] Furthermore, relying solely on volumetric measurements for control is also affected by differences in drug solution density. Different intravenous medications do not have a constant drug solution density of 1 g / mL. Using volume as the sole control basis makes it difficult to accurately reflect the actual mass of discarded solution, thus further amplifying disposal errors and increasing potential safety risks in clinical medication use. In contrast, monitoring the overall weight change of the intravenous drug container directly reflects changes in the amount of discarded solution, unaffected by container shape or differences in drug solution density, and offers greater objectivity and accuracy.
[0005] While some infusion monitoring systems based on weight monitoring exist on the market (such as IV Bag Weighing and IoT infusion monitoring modules), these systems are primarily designed for monitoring the status and providing alarms during the infusion process, without specifically addressing the disposal of infusion fluid. Specifically, existing systems generally suffer from the following shortcomings: they passively monitor changes in container weight, lacking the ability to set target parameters before disposal, thus failing to pre-set the required disposal volume or target retention volume based on clinical needs; they lack a real-time feedback control mechanism for the disposal process, making it impossible to dynamically compare and assess weight changes during disposal; and they typically do not provide proactive alerts for disposal, failing to promptly remind the operator to stop when the target value for disposal is reached, thus making it difficult to avoid problems of excessive or insufficient disposal.
[0006] Therefore, existing weight monitoring systems are more used for "observation and alarm" rather than "control and guidance," and cannot meet the actual needs of quantitative disposal control, target setting and real-time prompts in clinical intravenous medication. They are especially unsuitable for intravenous drug quantitative disposal scenarios that require high precision, repeatability and standardized operation. Summary of the Invention
[0007] The purpose of this invention is to provide a weight feedback-based intravenous drug quantitative disposal control device and method. By real-time monitoring and control of changes in the weight of the intravenous drug container, the device achieves precise control of the disposal volume without altering the existing intravenous drug container structure or relying on container graduations and drug density. It also provides clear prompts to the operator when the disposal volume reaches the set target, thereby improving the accuracy, safety, and standardization of disposal operations and reducing the risk of human error.
[0008] To achieve the above objectives, the present invention provides a weight-feedback-based intravenous drug quantitative disposal control device, comprising: shell; Hooks, located at the bottom of the casing, are used to suspend intravenous drug containers; A weighing sensor, located in the load-bearing connection path of the hook, is used to convert the weight change of the intravenous drug container and the drug solution inside into an electrical signal. The main control circuit module, located on the outer casing, is electrically connected to the weighing sensor and is used to receive and process electrical signals. The operation setting module, located on the outer casing, is connected to the main control circuit module and is used to receive input parameters such as the target discarded liquid weight or the target retained volume. The sound and light prompt module is located on the outer casing and is connected to the main control circuit module for sound and / or light prompts; The main control circuit module processes the electrical signal of weight change, calculates the current amount of liquid to be discarded or the current volume to be retained, and dynamically compares it with the target parameters. When the comparison result reaches the preset target condition, it outputs a control signal to the sound and light prompt module to prompt the termination of the liquid discarding operation.
[0009] Preferably, it also includes a fixed bracket located at the bottom of the housing, which is a foldable quadruped used to support the housing on the work surface.
[0010] Preferably, it also includes a hook located on the top of the casing, which can be used to hang the casing directly.
[0011] Preferably, the system includes a waste tubing assembly comprising a waste needle, a waste tubing, and a stop clamp, for connecting to the outlet of an intravenous drug container to perform a waste disposal operation, and the waste tubing assembly is isolated from the patient's infusion pathway.
[0012] Preferably, the main control circuit module includes: The signal acquisition unit is used to receive the electrical signal of weight change output by the weighing sensor; The data processing unit is used to calculate the current discarded liquid volume or the current retained volume and dynamically compare it with the target parameters; The control output unit is used to output control signals to the audio-visual prompt module when the control conditions are met.
[0013] Preferably, the operation setting module is implemented using buttons, knobs, or touch controls and is integrated into the operation panel of the casing.
[0014] Preferably, the weighing sensor is a strain gauge weighing sensor.
[0015] The technical solution of the present invention also provides a method for controlling the quantitative disposal of intravenous drugs based on weight feedback, comprising the following steps: Zero-point calibration of the gravimeter was performed, and the intravenous drug container to be discarded was suspended below the device to record the initial weight. Input the target waste liquid weight or target retention volume parameter through the operation settings module; Connect the waste tubing assembly to the outlet of the intravenous drug container and ensure that the stop clamp is closed. Open the stop clamp to begin discharging liquid; the weighing sensor continuously collects weight change signals and sends them to the main control circuit module. The main control circuit module processes the real-time weight change signal, calculates the current amount of liquid to be discarded or the volume to be retained, and dynamically compares it with the preset target parameters. When the current liquid disposal volume or retention volume is determined to have reached or approached the target value, the audible and visual prompt module outputs a prompt signal, closes the flow stop clamp, and stops the liquid disposal operation.
[0016] Preferably, the target waste liquid weight or target retention volume is directly set, and the main control circuit module automatically performs the corresponding calculations and comparisons based on the target parameter type.
[0017] Preferably, during dynamic comparison, when the main control circuit module detects that the difference between the current value and the target value enters the preset threshold range, it is determined that the target value has been reached or is close to being reached.
[0018] Compared with the prior art, the present invention has at least the following beneficial effects: 1. Real-time weight feedback enables high-precision control of waste liquid volume; 2. It does not depend on the scale of the intravenous drug container or the density of the drug solution, and is suitable for soft containers; 3. Allows setting target waste volume or target retention volume, standardizing the control process; 4. Audible and visual prompts can reduce the risk of human error. 5. The operation process is simple, reducing manual estimation and repeated sampling operations; 6. It is easy to integrate into existing PIVAS workflows and has good value for promotion and application. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structural modules of the device in the weight feedback-based intravenous drug quantitative waste disposal control device and method of the present invention. Figure 2 This is a schematic diagram showing the signal connection relationship between the weighing sensor and the main control circuit module in a weight-feedback-based intravenous drug quantitative waste disposal control device and method of the present invention.
[0020] Reference numerals: 1. Hook; 2. Weight display screen; 3. Main control circuit module; 4. Audible and visual prompt module; 5. Weighing sensor; 6. Intravenous drug container; 7. Fixing bracket; 8. Disposal tubing assembly. Detailed Implementation
[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0022] This invention discloses a weight-feedback-based device and method for controlling the quantitative disposal of intravenous medications. The device collects, calculates, and compares the weight changes of the intravenous medication container 6 during the disposal process in real time with a target, constructing a closed-loop control system for the disposal process, thereby achieving precise control of the disposal volume. The main structure of the device includes a housing for mounting an electronic module and hooks 1 located above and below the housing. The lower hook 1 engages with the suspension part of the intravenous medication container 6, allowing it to be stably suspended below the housing. The upper hook 1 provides the convenience of directly suspending the entire device. A weighing sensor 5 is installed in the load-bearing connection path of the lower hook 1. This weighing sensor 5 is preferably a strain gauge weighing sensor, whose range covers the maximum load-bearing weight of common intravenous medication containers 6. The entire weight of the intravenous medication container 6 and its contents is applied to the housing through the weighing sensor 5, thereby accurately converting the weight changes during the disposal process into electrical signals and outputting a real-time weight feedback signal to the main control circuit module 3.
[0023] The main control circuit module 3, as the core processing unit of the device, is installed in the outer casing and electrically connected to the weighing sensor 5. It is responsible for receiving and processing the weight change signal output by the weighing sensor 5. The main control circuit module 3 includes three functional parts: a signal acquisition unit, a data processing unit, and a control output unit. The signal acquisition unit is electrically connected to the weighing sensor 5 and is specifically used to receive the weight change signal output by the weighing sensor 5. The data processing unit processes the weight change signal, calculates the current discard volume or the current retention volume, and dynamically compares the calculation result with the target parameters input by the operator through the operation setting module. When the comparison result reaches or approaches the preset target condition, a discard compliance judgment signal is generated. The control output unit outputs the corresponding control signal to the audible and visual prompt module 4 when the control conditions are met.
[0024] The operation setting module, located on the outer casing and connected to the main control circuit module 3, receives the target waste liquid weight or target retention volume parameters input by the operator. These target parameters serve as the control reference in the weight feedback control process. This module can be implemented using buttons, knobs, or touch controls and can be integrated into the operation panel of the device casing for easy setting by the operator according to clinical needs. The audible and visual prompt module 4, also located on the outer casing and connected to the main control circuit module 3, receives control signals from the main control circuit module 3. When the main control circuit module 3 generates a waste liquid target assessment signal, this module provides a clear warning to the operator to terminate the waste liquid disposal operation through sound, light, or a combination of sound and light prompts, effectively preventing excessive or insufficient waste liquid disposal. Furthermore, a weight display screen 2, also connected to the main control circuit module 3, can be installed on the surface of the outer casing to display the weight of the current waste liquid volume calculated by the main control circuit module 3 in real time.
[0025] The waste disposal tubing assembly 8 is located below the outlet of the intravenous drug container 6 and is used to connect to the intravenous drug container 6 to realize the waste disposal operation. The assembly includes a waste disposal needle, a waste disposal tubing and a stop clamp. The entire waste disposal process is kept isolated from the patient's infusion line to avoid any impact on the patient's medication process and ensure patient safety.
[0026] In addition, depending on the actual use scenario, the device can also be equipped with a fixed bracket 7, which is preferably in the form of a foldable quadruped, used to provide stable support and positioning for the device when it needs to be placed or supported on the operating table (such as a clean operating table); when the fixed bracket 7 is not used, the device can be directly suspended by the hook 1 located on the top. This flexible design makes it adaptable to the actual needs of various working environments such as intravenous drug preparation centers and outpatient chemotherapy rooms.
[0027] Based on the above structural configuration, hanging hooks 1 are respectively installed at the top and bottom of the main body shell of the device to ensure that the weighing sensor 5 in the load-bearing path of the lower hook 1 can accurately sense the entire weight load. The selection of the weighing sensor 5 must ensure that its accuracy meets the requirements of clinical waste disposal control, and that its measuring range can cover the entire weight change from an empty container to a fully loaded liquid. For the configuration using a fixed bracket 7, the folding mechanism of the bracket should ensure sufficient stability in the unfolded state, while being easy to store and carry in the folded state.
[0028] Regarding the construction of the circuit system, the functional units of the main control circuit module 3 need to be integrated and installed inside the casing. The signal acquisition unit should have anti-interference capabilities to ensure accurate acquisition of weight signals. The data processing unit needs to have built-in existing algorithm programs to realize the conversion and target comparison functions of weight change with discarded liquid volume or retained volume. The control output unit should be able to provide sufficient driving capability to activate the audible and visual prompt module 4. The interface circuit of the operation setting module needs to be reliably connected to the main control circuit module 3 to ensure that the target parameters can be accurately transmitted and stored. The driving circuit of the audible and visual prompt module 4 is connected to the control output unit of the main control circuit module 3, and drives the sound-emitting element and the light-emitting element to work according to the received control signal to provide clear and identifiable prompt information.
[0029] The configuration of the waste disposal tubing assembly 8 requires a sealed connection between the waste disposal needle and the outlet of the intravenous drug container 6. The waste disposal tubing should possess sufficient flexibility and chemical resistance to accommodate the passage of different types of medications. The stop clamp should be easy to operate and reliably seal, ensuring complete prevention of medication flow when closed. The entire tubing assembly is designed for single use to avoid the risk of cross-contamination.
[0030] Before implementing quantitative waste disposal control for intravenous medications, the placement of the device and system initialization preparation must be completed, including: 1. Device Placement and Start-up: Depending on the usage scenario, hang the waste disposal device directly in a suitable position using the hook 1 above it, or unfold the fixing bracket 7 and place the waste disposal device on the operating table (such as a clean bench) to ensure the device is in a stable state; after connecting the power supply, the main control circuit module 3 starts running and performs a system self-test on the weighing sensor 5, operation setting module and audio-visual prompt module 4 to confirm that each functional module is in normal working condition.
[0031] 2. Weighing Calibration and System Initialization: With the intravenous drug container 6 not being disposed of (i.e., without the intravenous drug container 6 suspended or supported), the weighing sensor 5 is zero-point calibrated to eliminate the influence of the device's own weight and environmental factors on the weighing results. The weighing sensor 5 can be calibrated by loading a standard weight of known weight to verify the measurement accuracy of the weighing sensor 5 within its working range. After zero-point calibration, the intravenous drug container 6 to be disposed of is suspended below the device, so that its weight acts on the weighing sensor 5 through the load-bearing connection path. The main control circuit module 3 automatically collects and records the weight at this moment as the initial weight reference for subsequent calculation and judgment of the amount of liquid to be disposed of. This completes the system initialization.
[0032] Based on the above preparations, the following steps are used to control the quantitative disposal of intravenous medications: 1. Target parameter setting: The operator first inputs the target waste liquid weight or target retention volume parameter through the operation setting module. This target parameter is stored in the data processing unit of the main control circuit module 3 as the judgment benchmark in the waste liquid control process.
[0033] 2. Disposal tubing connection: Connect the disposal tubing assembly 8 to the outlet of the intravenous drug container 6, and ensure that the stop clamp is closed to ensure that the medication will not flow out before the actual disposal. It is important to emphasize that the disposal tubing assembly 8 is only used for disposal operations, is not connected to the patient, and is completely independent of the patient's infusion pathway.
[0034] 3. Disposal execution and weight feedback: Open the stop clamp to start the disposal operation. During the disposal process, the weighing sensor 5 continuously collects the weight change signal of the intravenous drug container 6 and the drug solution inside, obtains the real-time weight signal reflecting the disposal process, and sends the weight change signal to the signal acquisition unit of the main control circuit module 3 in real time.
[0035] 4. Real-time judgment and control: The data processing unit of the main control circuit module 3 processes the real-time collected weight change signal, calculates the weight of the currently discarded liquid or the corresponding current retention volume, thereby obtaining quantitative parameters reflecting the liquid discarding process, and compares the calculation results with the preset target parameters in real time.
[0036] 5. Prompt and Termination of Disposal: When the main control circuit module 3 determines that the current amount of discarded liquid reaches or is close to the set target discarded liquid weight, or the current retention volume reaches or is close to the set target retention volume, the main control circuit module 3 generates a disposal compliance judgment result and outputs a control signal to the audible and visual prompt module 4 through the control output unit. The audible and visual prompt module 4 outputs sound prompts, light prompts, or a combination of sound and light prompts according to the control signal to prompt the operator to terminate the disposal operation to prevent excessive or insufficient disposal. The operator closes the stop clamp and stops the disposal operation according to the prompt.
[0037] 6. Liquid disposal completed: After the liquid disposal operation is completed, remove the liquid disposal pipeline assembly 8. The liquid disposal device can then be put into use again or the power can be turned off.
[0038] Through the above method, the present invention can provide real-time feedback and dynamic judgment on the weight change of the intravenous drug container 6 during the disposal process, thereby achieving precise control of the disposal volume. This embodiment does not rely on the volume scale of the intravenous drug container 6, nor does it require pre-determining the drug density, which can effectively avoid disposal errors caused by container deformation, scale errors, and differences in drug density, thus improving the accuracy and consistency of the disposal operation.
[0039] This invention does not rely on the volume scale of the intravenous drug container 6 during the waste disposal process, nor does it require prior measurement of the drug solution density. It can effectively avoid waste disposal control errors caused by deformation of soft containers, scale errors, and differences in drug solution density, thereby achieving high precision, high consistency, and repeatable control of waste disposal volume.
[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A weight-feedback-based intravenous drug dispensing control device, characterized in that, include: shell; Hooks, located at the bottom of the casing, are used to suspend intravenous drug containers; A weighing sensor, located in the load-bearing connection path of the hook, is used to convert the weight change of the intravenous drug container and the drug solution inside into an electrical signal. The main control circuit module, located on the outer casing, is electrically connected to the weighing sensor and is used to receive and process electrical signals. The operation setting module, located on the outer casing, is connected to the main control circuit module and is used to receive input parameters such as the target discarded liquid weight or the target retained volume. The sound and light prompt module is located on the outer casing and is connected to the main control circuit module for sound and / or light prompts; The main control circuit module processes the electrical signal of weight change, calculates the current amount of liquid to be discarded or the current volume to be retained, and dynamically compares it with the target parameters. When the comparison result reaches the preset target condition, it outputs a control signal to the sound and light prompt module to prompt the termination of the liquid discarding operation.
2. The intravenous drug dispensing control device based on weight feedback according to claim 1, characterized in that, It also includes a fixed bracket located at the bottom of the casing, which is a foldable quadruped used to support the casing on the work surface.
3. The intravenous drug dispensing control device based on weight feedback according to claim 1, characterized in that, It also includes a hook located on the top of the casing, which can be used to hang the casing directly.
4. A weight-feedback-based intravenous drug dispensing control device according to claim 1 or 2, characterized in that, It includes a waste tubing assembly, which consists of a waste needle, a waste tubing, and a stop clamp, for connecting to the outlet of an intravenous drug container to enable waste disposal, and the waste tubing assembly is kept isolated from the patient's infusion line.
5. The intravenous drug dispensing control device based on weight feedback according to claim 4, characterized in that, The main control circuit module includes: The signal acquisition unit is used to receive the electrical signal of weight change output by the weighing sensor; The data processing unit is used to calculate the current discarded liquid volume or the current retained volume and dynamically compare it with the target parameters; The control output unit is used to output control signals to the audio-visual prompt module when the control conditions are met.
6. The intravenous drug dispensing control device based on weight feedback according to claim 4, characterized in that, The operation settings module is implemented using buttons, knobs, or touch controls and is integrated into the control panel of the casing.
7. The intravenous drug dispensing control device based on weight feedback according to claim 4, characterized in that, The load cell is a strain gauge load cell.
8. A method for a weight-feedback-based intravenous drug dispensing control device according to any one of claims 4-7, characterized in that, Includes the following steps: Zero-point calibration of the gravimeter was performed, and the intravenous drug container to be discarded was suspended below the device to record the initial weight. Input the target waste liquid weight or target retention volume parameter through the operation settings module; Connect the waste tubing assembly to the outlet of the intravenous drug container and ensure that the stop clamp is closed. Open the stop clamp to begin discharging liquid; the weighing sensor continuously collects weight change signals and sends them to the main control circuit module. The main control circuit module processes the real-time weight change signal, calculates the current amount of liquid to be discarded or the volume to be retained, and dynamically compares it with the preset target parameters. When the current liquid disposal volume or retention volume is determined to have reached or approached the target value, the audible and visual prompt module outputs a prompt signal, closes the flow stop clamp, and stops the liquid disposal operation.
9. A method for controlling the quantitative disposal of intravenous drugs based on weight feedback according to claim 8, characterized in that, This includes directly setting the target waste weight or target retention volume, and the main control circuit module automatically performs the corresponding calculations and comparisons based on the target parameter type.
10. A method for controlling the quantitative disposal of intravenous drugs based on weight feedback according to claim 8, characterized in that, During dynamic comparison, when the main control circuit module detects that the difference between the current value and the target value enters the preset threshold range, it is determined that the target value has been reached or is close to being reached.