A high-precision medical feeding weighing control module
By designing a high-precision medical feed weighing control module in the hospital, using components such as sensors and digital acquisition boards to achieve real-time monitoring and alarm of the infusion process, the problem of infusion process cannot be monitored in real-time, and the timeliness of drug delivery are improved and Accuracy and suitable for complex environments.
Patent Information
- Application Number
- CN202111104473.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-09-22
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2041-09-22
AI Technical Summary
In hospitals, due to the shortage of medical staff, the infusion process cannot be monitored in real time, which often occurs when the medication is not given timely or the patient is not removed for a long time after the infusion is over.
A high-precision medical feed weighing control module is designed, including sensors, digital acquisition boards, microprocessing modules, alarm modules, timer modules and GPRS modules, real-time data transmission and monitoring are realized through RS485 data lines and wireless signals. Able to accurately judge the infusion condition and call the alarm in time.
It realizes high-precision infusion monitoring to ensure the timeliness and accuracy of drug delivery. It is suitable for infusion bags of different weights, has high anti-interference performance and a wide range of application, and can work in complex electromagnetic environments, and can be disinfected externally.
Smart Images
Figure CN113694306B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of medical monitoring sensor equipment, in particular to a high-precision medical feeding weighing control module. Background Art
[0002] In the traditional infusion process, nurses are mainly responsible for checking the infusion drugs and starting to infuse the patients after checking that the infusion drugs are correct. When the infusion is finished, the patient or the patient's companion reminds the nurse to change the solution or end the infusion. At present, in order to reduce the labor intensity of nurses manually monitoring the infusion status and improve work efficiency, various infusion monitors have emerged.
[0003] Nowadays, people's quality of life and medical level have significantly improved. The number of patients that hospitals can accommodate is increasing, but the number of medical staff is becoming increasingly scarce. Since the conditions of patients receiving infusions at the same time are different, the progress of infusions cannot be monitored in real time. There are often phenomena of untimely medication or failure to remove the needle for a long time after the infusion is over. Summary of the invention
[0004] To solve the above problems, the present invention provides the following technical solutions: a high-precision medical feeding weighing control module, comprising a shell; also comprising a sensor loading hook, the loading hook is fixed to the lower end of the sensor, and the sensor is installed inside the shell; a high-precision digital acquisition board is connected to the side of the sensor, and an anti-overload limit mechanism is plugged into one end; also comprising a shell cover, the shell cover is installed on the shell close to the high-precision digital acquisition board.
[0005] Preferably, a USB quick calibration interface is provided on the outer side of the shell cover, and the USB quick calibration interface is connected to the high-precision digital acquisition board.
[0006] Preferably, a RS485 data line interface is provided on a side of the housing, and the RS485 data line interface is connected to the sensor.
[0007] Preferably, the high-precision digital acquisition board is internally provided with a microprocessor module, an alarm module, a timer module, and a GPRS module.
[0008] Preferably, the sensor, the alarm module, the timer module and the GPRS module are respectively connected to the micro-processing module.
[0009] Preferably, the GPRS module communicates with the external PC via wireless signal transmission.
[0010] Preferably, a display is provided on the surface of the shell cover, and the display is connected to the timer module.
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] 1. High precision, the sensor and digital acquisition board can achieve 0.01% accuracy, and the internal double monitoring method is used to ensure the accuracy of the situation judgment during infusion;
[0013] 2. Modular design, sensors of different ranges can be replaced according to the usage scenario to adapt to infusion bags of different weights;
[0014] 3. High anti-interference performance, all metal shell wraps all circuits, with RS485 digital signal transmission, suitable for complex electromagnetic environment;
[0015] 4. Wide range of applications, can be used for single infusion control, can also be integrated into medical equipment;
[0016] 5. The exterior adopts IP65 protection and can be disinfected by alcohol spray. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is the overall structure diagram of the present invention;
[0018] Figure 2 This is a schematic diagram of the high-precision digital acquisition board module of the present invention;
[0019] Figure 3 This is a pulse waveform diagram during normal infusion of the present invention;
[0020] Figure 4 This is a pulse waveform diagram when the infusion is abnormal in the present invention;
[0021] In the figure: 1 housing, 2 sensor, 3 loading hook, 4 high-precision digital acquisition board, 401 microprocessor module, 402 alarm module, 403 timer module, 404 GPRS module, 5 overload protection limit mechanism, 6 housing cover, 7 USB fast calibration interface, 8 RS485 data line interface, 9 display. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0023] Reference Figure 1-4A high-precision medical feeding weighing control module includes a housing 1; a sensor 2 and a loading hook 3, wherein the loading hook 3 is fixed to the lower end of the sensor 2, and the sensor 2 is installed inside the housing 1; a high-precision digital acquisition board 4 is connected to the side of the sensor 2, and an anti-overload limit mechanism 5 is plugged into one end; and a shell cover 6 is also included, wherein the shell cover 6 is installed on the housing 1 close to the high-precision digital acquisition board 4. A USB quick calibration interface 7 is provided on the outside of the shell cover 6, and the USB quick calibration interface 7 is connected to the high-precision digital acquisition board 4. An RS485 data line interface 8 is provided on the side of the housing 1, and the RS485 data line interface 8 is connected to the sensor 2. Among them, the infusion bag and the infusion bottle are hung on the lower end of the sensor 2 through the loading hook 3, and the anti-overload limit mechanism 5 at the side end is used to prevent the strain gauge in the sensor 2 from being damaged by excessive deformation; when the strain gauge in the sensor 2 is deformed, its change data is collected in real time by the high-precision digital acquisition board 4, and can be connected to the handheld terminal through the USB fast calibration interface 7, and communicate with the PC host computer through the RS485 data line interface 8 to transmit signals in real time.
[0024] The high-precision digital acquisition board 4 is internally provided with a microprocessor module 401, an alarm module 402, a timer module 403, and a GPRS module 404. The sensor 2, the alarm module 402, the timer module 403, and the GPRS module 404 are connected to the microprocessor module 401, respectively.
[0025] The GPRS module 404 transmits signals to the external PC via wireless signals. A display 9 is provided on the surface of the housing cover 6 , and the display 9 is connected to the timer module 403 .
[0026] In the early stage of hanging the infusion bag and the infusion bottle, since the liquid pressure is the maximum at this time, the rate of liquid descent is relatively average. According to the fluctuation curve of the weight drop of the liquid medicine, the remaining dose of the infusion, the remaining time is estimated, and the early stage of the infusion, that is, when the liquid medicine is half or more, the needle blockage, needle leakage, dripping stop, etc. of the infusion are judged. The timer module 403 inputs and captures, calculates the time difference t between two adjacent drops, and calculates the drop speed v drops / s according to the formula v=60 / t+1. To reduce the error, the time difference between three adjacent drops is collected continuously, and the average value is calculated and substituted into the formula. In order to reduce the judgment error, that is, the influence of the shaking of the bottle or bag body on the drop rate, when the detected drop speed v is 0 for 20 consecutive seconds, the alarm module 402 is enabled to send a signal to the PC to notify the medical staff to come and deal with it.
[0027] When the liquid in the infusion bag or infusion bottle drops below half of the total weight, the liquid pressure decreases at this time, especially when the remaining liquid approaches zero, even if a slight shock occurs, it can be easily misjudged as the state of infusion completion. Therefore, the judgment method at this time is to add a pulse monitoring while using the droplet speed v. Among them, when the electric pulse signal received by the timer module 403 and the droplet speed v are both close to 0 within a reference time period, the microprocessor module 401 determines that it is an abnormal working state according to the pre-set program, sends a signal to the alarm module 402, and the GPRS module 404 sends a signal to the PC end to notify medical staff to come and handle it.
[0028] The source of the electric pulse signal is based on the induction of the weight of the liquid by the strain gauge in the sensor 2. Since the liquid continues to decrease during infusion, the deformation of the strain gauge is in a long-term change, resulting in a short-term level change, and the digital level changes from a low level to a high level. Even if the liquid receives external shocks, it will only generate a negative pulse and will not make the digital level 0, so it does not need to be taken into consideration. When the level change received by the microprocessor module 401 is close to 0 within a period of time, it means that there is no weight change at the strain gauge, and the liquid fluctuation cannot be monitored, indicating that an infusion abnormality has occurred.
[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A high-precision medical feeding weighing control module, comprising a housing (1); characterized in that: The device also comprises a sensor (2) and a loading hook (3), wherein the loading hook (3) is fixed to the lower end of the sensor (2), and the sensor (2) is installed inside the housing (1); a high-precision digital acquisition board (4) is connected to the side of the sensor (2), and an overload prevention limit mechanism (5) is plugged into one end of the sensor (2); and the device also comprises a housing cover (6), wherein the housing cover (6) is installed on the housing (1) in close proximity to the high-precision digital acquisition board (4), a microprocessor module (401), an alarm module (402), a timer module (403), and a GPRS module (404) are arranged inside the high-precision digital acquisition board (4), and the sensor (2), the alarm module (402), and the timer module (403) are connected to the housing (1). 03), the GPRS module (404) is connected to the microprocessor module (401) respectively, and the captured data is input by the timer module (403), the time difference t between two adjacent droplets is calculated, and the droplet speed is calculated. When the liquid in the infusion bag or infusion bottle drops below half of the total weight, the judgment method at this time is to use the droplet speed v and add a pulse monitoring. Among them, when the electric pulse signal received by the timer module (403) within a reference time period and the droplet speed v are both close to 0, the microprocessor module (401) determines that it is an abnormal working state according to a pre-set program. The source of the electric pulse signal is based on the induction of the liquid weight by the strain gauge in the sensor (2).
2. The high-precision medical feeding weighing control module according to claim 1, characterized in that: A USB quick calibration interface (7) is provided on the outer side of the shell cover (6), and the USB quick calibration interface (7) is connected to the high-precision digital acquisition board (4).
3. The high-precision medical feeding weighing control module according to claim 1, characterized in that: An RS485 data line interface (8) is provided on the side of the housing (1), and the RS485 data line interface (8) is connected to the sensor (2).
4. The high-precision medical feeding weighing control module according to claim 1, characterized in that: The GPRS module (404) communicates with the external PC via wireless signal transmission.
5. The high-precision medical feeding weighing control module according to claim 1, characterized in that: A display (9) is provided on the surface of the shell cover (6), and the display (9) is connected to the timer module (403).