CN104800930A - Monitoring method of suspension bottle transfusion system - Google Patents

Abstract

The invention relates to a monitoring method of a hanging bottle infusion system, which uses the refraction or total reflection of light between air and liquid to change the light direction to detect whether there is liquid in the infusion pipeline. It changes the original judging light intensity into judging the presence or absence of light signals. Its detection equipment has simplified structure, higher reliability, more convenient installation and use, and stronger applicability to infusion liquid components. It is an automatic monitoring and alarm belt for the infusion process. Here comes the good solution.

Description

A monitoring method for a hanging bottle transfusion system

technical field

The invention belongs to the field of medical devices, and in particular relates to a monitoring method for a hanging bottle infusion system.

Background technique

In general hospitals, when the patient uses the infusion bottle, there is usually someone waiting by the side or the ward has a call system, especially when the infusion is for a coma or unconscious patient, the patient must have family, friends or It's a nurse waiting. However, in the middle of the night, the caregiver may doze off due to fatigue, and if the needle is not pulled out in time after the fluid is transfused, it may cause blood backflow and seriously endanger the patient's body. Therefore just need a device that automatically monitors whether the transfusion is finished.

At present, there are mainly three methods to realize infusion monitoring:

1. Rely on the change of the weight of the bottle. This method judges whether the infusion is completed by detecting the weight change before and after the infusion of the hanging bottle, and mainly relies on the pressure sensor to collect data, and uses a single-chip microcomputer to process the data and judge the progress of the infusion.

2. Rely on the camera for real-time monitoring. This method involves installing a camera near the bottle and transmitting the image to the duty room. People in the duty room should always pay attention to the progress of the infusion.

3. Rely on the liquid's absorption of infrared rays.

This method is further divided into two categories:

3.1) Detect the liquid in the hanging bottle. When there is liquid in the hanging bottle, part of the infrared rays will be absorbed by the liquid. At this time, the receiving end will receive a certain intensity of infrared light. When the infusion is completed, the liquid level will be lower than the receiving end. At this time, the receiving end will receive different Intensity of light, through the change of received light intensity to judge whether the infusion is complete.

3.2) Detection of liquid droplets in the air bag of the infusion tube. When the patient is infusion, the air bag of the infusion tube continuously has liquid droplets dripping, and when the liquid droplets fall and pass through the infrared light, part of the infrared light will be absorbed. When no liquid drops fall after the infusion, the infrared light will not be absorbed, so Infrared light with two intensities will be detected before and after the infusion to judge whether the infusion is complete.

But the existing hanging bottle infusion system all has the defective that is difficult to overcome:

Judging whether the infusion is completed by the change of the weight of the bottle, although this method is simple, the accuracy is not high. The most fatal flaw is that the bottles used in the hospital are of different sizes and specifications, and the weights of different bottles are the same, so this method requires Measure the weight of all specifications of hanging bottles used in the hospital before and after use. And even if it is the same kind of hanging bottle, the amount of medicine injected inside will be different. In addition, if the infusion tube is accidentally pulled, it will also affect the detection of the weight, so that the device cannot achieve the expected effect.

Although the use of cameras for real-time monitoring saves manpower, the cost is high, and if the monitoring personnel accidentally fall asleep at night, it will also cause some serious consequences. Therefore adopt camera and can not reach the effect of automatic monitoring alarm.

The absorption of infrared rays by liquid is used. Although this method is applicable to all hanging bottles, it is not suitable for all medicines. Many medicines added to the hanging bottles during infusion in the hospital are not colorless and transparent, but colored like brown or orange. For medicines, especially for blood transfusion, the blood is dark red and more viscous than ordinary colorless and transparent liquids. These different liquids have great differences in the absorption of infrared rays. Therefore this approach is not suitable for all situations.

Contents of the invention

The purpose of the present invention is to overcome the defects of the prior art, and provide a monitoring method for the hospital hanging bottle infusion system based on the principle of light refraction or total reflection.

The technical scheme adopted for achieving the above-mentioned purpose is:

The invention relates to a monitoring method for a hanging bottle transfusion system, which uses light refraction or total reflection between the air and the liquid in the transfusion tube to change the direction of the light to detect whether there is liquid in the transfusion tube.

The light is incident from the outside of the infusion tube, causing the light to be refracted or totally reflected between the air, liquid and the medium of the infusion tube, thereby changing the direction, and detecting whether there is light in the direction of the incident light outside the infusion tube to judge whether there is liquid in the infusion tube.

When the infusion tube is filled with liquid, when the incident light enters from the outside of the infusion tube, keep a certain slope when the light enters the liquid, and a refraction phenomenon will occur. If the light is emitted from the liquid to the air, and the incident angle is not a right angle, The second refraction will also occur. As long as the initial incident light is not in the center of the infusion tube, the light emitted from the infusion tube will not be in the same direction as the incident light. This signal can be easily and accurately detected by the photosensitive device. In particular, when the incident light enters from the edge of the infusion tube, total reflection will occur between the liquid-infusion tube-air medium, which will greatly change the direction of the incident light, making the photosensitive device on the other side of the infusion tube incident light Easier and more accurate detection, so as to monitor whether the liquid in the bottle infusion system has run out, and then alarm through the electronic alarm to remind the user and guardian to immediately notify the nurse to replace the bottle or take the needle.

The light is incident from the upper part of the air bag of the Murphy dropper, so that the light enters the liquid surface, refraction or total reflection occurs between the air, liquid and the infusion tube medium, thereby changing the direction, and detecting whether there is light in the direction of the incident light outside the infusion tube, To judge whether there is liquid in the infusion line.

When there is liquid in the air bag of the Murphy's dropper, when the incident light enters from the upper part of the air bag, keep a certain slope when the light enters the liquid surface, and a refraction phenomenon will occur. If the light is emitted from the liquid to the air, and the incident light If the angle is not a right angle, the second refraction will also occur. As long as the incident point of the initial incident light is not in the center of the air bag of the Murphy dropper, the light emitted from the air bag of the Murphy dropper is not in the same direction as the incident light. The photosensitive device can easily and accurately detect this signal. In particular, when the incident light enters from the edge of the air bag of the Murphy's dropper, total reflection will occur between the liquid-infusion tube-air medium, so that the direction of the incident light will change greatly, so that the incident light of the infusion tube will be different. The photosensitive device on one side is easier and more accurate to detect, so as to monitor whether the liquid in the bottle infusion system has run out, and then the electronic alarm will alarm to remind the user and guardian to immediately notify the nurse to replace the bottle or take the needle.

The beneficial effect of adopting the above technical solution is: the monitoring method of the hanging bottle infusion system uses the refraction or total reflection of light between the air and the liquid to change the direction of the light to detect whether there is liquid in the infusion pipeline. Its monitoring part changes the original judgment of light intensity into judgment of whether there is a light signal. Its detection equipment has simplified structure, higher reliability, more convenient installation and use, and stronger applicability to infusion liquid components. It is an automatic monitoring of infusion process. Calling the police brought good solutions.

Description of drawings

Fig. 1 is a schematic diagram of the structure and principle of Embodiment 1 of the monitoring method of the hanging bottle infusion system of the present invention.

Fig. 2 is a schematic diagram of Embodiment 2 of the monitoring method of the hanging bottle infusion system of the present invention.

FIG. 3 is a schematic diagram of the principle of FIG. 2 .

Fig. 4 is a block diagram of the overall structure of the monitoring method of the hanging bottle infusion system of the present invention.

Detailed ways

The present invention will be described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 4, the entire bottle infusion system includes a monitoring module, a power supply module, a main control circuit, a wireless transceiver module and an alarm module. The refraction or total reflection of the light between the air and the liquid changes the direction of the light to detect the presence or absence of the infusion pipeline. Liquid, and then send out an alarm to remind users or guardians to deal with it in time to avoid harm to users.

Example 1:

As shown in Figure 1, the infrared light transmitter A used as the monitoring module is the incident light source, and the incident light is incident from the upper part of the air bag of the Murphy dropper. If there is liquid in the air bag, the light enters the liquid surface obliquely from the edge of the liquid surface in the air bag, and The direction of refraction changes and cannot be focused on the infrared light receiver B outside the Murphy's pipette. If there is no liquid in the airbag, the light will focus on the infrared light receiver B outside the Murphy dropper after passing through the airbag. At this time, the monitoring module will send an alarm signal to the main control circuit, which will control the alarm module to alarm. The side sends a wireless alarm signal, so that the monitoring room can see the infusion alarm corresponding to the bed number, and take timely measures.

Adjust the above-mentioned infrared light emitter A, the incident light can make the light enter the liquid surface and then undergo total reflection between the liquid state, the air bag wall and the air medium, and the direction of the light changes, and detect whether there is light in the direction of the incident light from the outside of the air bag of the Murphy's dropper will be easier.

Example 2:

As shown in Figure 2 and Figure 3, the infrared light emitter A used as the monitoring module is the incident light source, and the incident light enters from the side of the infusion tube or the air bag. Since the tube is circular, as long as the incident light does not pass through the center of the tube , the light entering the pipe will be refracted because the pipe is filled with liquid, and the direction will change. If the infrared light receiver B is placed on the other side of the pipe, the light in the direction of the incident light cannot be monitored.

If there is no liquid in the bladder, the light can be detected. At this time, the monitoring module sends an alarm signal to the main control circuit, and the main control circuit controls the alarm module to alarm. If there is a wireless monitoring side to send a wireless alarm signal, the monitoring room can see the infusion alarm corresponding to the bed number, and take timely measures.

Adjust the above-mentioned infrared light emitter A so that the incident light enters from the edge of the infusion pipeline, which can cause total reflection between the liquid state, the air bag wall and the air medium after the light enters the liquid, and it is easier to monitor whether there is liquid in the pipeline.

The monitoring and alarming system for hanging bottle transfusion made according to the invention has low cost, convenient use and high reliability. The system can be divided into two parts, one is the infusion site monitoring part, and the other is the unified monitoring terminal part. Wireless communication is adopted between the two parts. The on-site monitoring part of the infusion is placed in the infusion room or ward, and the unified monitoring terminal part is placed in the nurse's duty room. When a monitoring device detects that the infusion is about to be completed, the detection device will send information to the terminal, and the terminal will send information to the staff on duty after receiving the information. Make a voice prompt and show the number of beds in which ward the transfusion is completed.

The wireless communication of the system can be made by using NRF905 chip, and the terminal part uses ARM9 as the core to process information and data, which has high efficiency and good real-time performance. The terminal display part uses 12864 LCD to display which bed in which ward, and at the same time voice prompts The WT588D chip is selected. This chip has a combination of multiple voice prompts, which is especially suitable for multi-bed parallel calls when there are many hospital beds. The NRF905 chip can both send data and receive data, and use each monitoring device as a transfer station to transmit information from other devices, so as to avoid affecting the signal transmission distance due to multiple walls in the hospital ward. If the monitoring device is placed properly, Theoretically, the infusion monitoring information of the entire floor can be collected in one place.

Claims (3)

1. A monitoring method for a hanging bottle transfusion system, characterized in that: the light is refracted or totally reflected between the air and the liquid in the transfusion tube to change the direction of the light to detect whether there is liquid in the transfusion tube. 2. The monitoring method according to claim 1, characterized in that: the light is incident from the outside of the infusion tube, causing the light to be refracted or totally reflected between the air, liquid and the medium of the infusion tube, thereby changing the direction, and the infusion tube The external incident light direction detects whether there is light to judge whether there is liquid in the infusion pipeline. 3. The monitoring method according to claim 1, characterized in that: the light is incident from the upper part of the air bag of the Murphy's dropper, so that the light enters the liquid surface, and refraction or total reflection occurs between air, liquid and the medium of the infusion tube , so as to change the direction, and detect whether there is light in the direction of incident light outside the infusion tube to judge whether there is liquid in the infusion tube.