CN103007392A - Intravenous infusion warning device - Google Patents

Abstract

The invention discloses an early warning device for intravenous infusion, which comprises a casing, a support plate and a hook; the casing includes a casing panel and a casing main body, and the casing panel and the casing main body are connected by screws; The panel is provided with a display unit, an indication unit, an operation button and a button for setting the weight of the liquid medicine, and the display unit, the indication unit, the operation button and the button for setting the weight of the medicine liquid are all connected to the circuit board; the support plate is connected to the weight sensor; the weight sensor Connected with the connection hook, the weight sensor and the speaker are connected to the circuit board, the circuit board is provided with an amplifier circuit, AD conversion circuit and controller, the weight sensor is connected to the amplifier circuit, and the amplifier circuit, AD conversion circuit and controller are connected in turn . The invention can measure the weight change of the infusion bottle (bag), provide the weight of the liquid in the infusion bottle (bag) in time, provide convenience for medical staff, improve work efficiency, and make the infusion process safer.

Description

A kind of early warning device for intravenous infusion

technical field

The invention relates to an early warning device for intravenous infusion.

Background technique

According to statistics, China's annual medical infusion is 10.4 billion bottles, which is equivalent to an average of 8 bottles per person per year for 1.3 billion people, far higher than the international standard of 2.5 to 3.3 bottles. At the same time, although intravenous warning devices can greatly reduce the labor intensity of medical staff, at present, various intravenous infusion warning devices at home and abroad are still not popular, which is mainly due to the defects of various types of devices. of. Relatively more used is a mechanical device, which uses simple gravity measurement to collect data, and when the weight of the measured bottle is less than a certain value, an alarm will sound. The design principle of the device is simple, and the information is directly and simply collected without going through the process of voltage amplification and AD conversion, so that the error of the measurement data is very large, often exceeding 25%, and sometimes even completely exceeding the acceptable error range, which is easy to cause medical malpractice. In addition, the volume of the device is also relatively large, which is not attractive in appearance.

Other device systems such as "WS-S-1" automatic infusion alarm, "NBW-GB" infusion alarm, "JQ-2" infusion alarm, "Bingyou MJY-01" portable medical infusion monitor wait. Among them, "Binyou MJY-01" portable medical infusion monitor is a relatively high-end and advanced product. It uses laser surveillance. The liquid level sensor of the laser infusion monitor monitors the liquid level of the liquid medicine in the infusion tube in real time during the intravenous infusion process. When the liquid level of the liquid medicine reaches the monitoring point of the sensor, the monitor sends out a sound alarm when the infusion is completed, and the clamping device of the infusion tube automatically Liquid off. Cooperating with the receiver, it can also send out radio frequency signals to communicate with the radio frequency network repeater. The advantage is that monitoring, protection and alarm can be realized accurately. Reliability is very high with few instances of bug reports. The appearance is also small and beautiful. The disadvantage is that the price is very high (about 400 yuan for the model without a receiver, and about 700 yuan for the model with a receiver). Obviously, it is difficult to buy in large quantities to meet medical needs. In addition, there is no display device, so it cannot be controlled intuitively.

Contents of the invention

The present invention provides an early warning device for intravenous infusion, which aims at overcoming the above-mentioned defects in the prior art, using a device with simple structure and low cost to monitor the process of intravenous infusion, improve the measurement accuracy in the infusion process, and reduce the workload of medical staff. Labor intensity.

The technical scheme adopted in the present invention is as follows:

An early warning device for intravenous infusion, comprising a casing (1), a support plate (13) and a hook (15); the casing includes a casing panel and a casing main body, the casing panel and the casing main body are connected by screws; a weight sensor (14 ), a circuit board (11) and a horn (12), and a display unit, an indication unit, an operation button and a liquid medicine weight setting button are arranged on the shell panel, and the display unit, the indication unit, the operation button and the liquid medicine weight setting button are all connected with the circuit The board is connected; the supporting board is connected with the weight sensor;

The weight sensor is connected with the connecting hook, the weight sensor and the horn are connected with the circuit board, the circuit board is provided with an amplification circuit, an AD conversion circuit and a controller, the weight sensor is connected with the amplification circuit, the amplification circuit, the AD conversion circuit and The controllers are connected in turn.

The shell has a length of 10-15 cm, a width of 5-8 cm, and a thickness of 4-7 cm.

The display unit includes at least three digital tubes.

The indicating unit includes a working indicator light (3) and an alarm indicator light (4).

The operation buttons include an "on/off" button (5) used to control the connection and disconnection of the external power supply and a "zero reset" button (6) used to reset the display unit, and the liquid medicine weight setting button Including preset weight 250g button (7), preset weight 500g button (8), weight increase 50g button (9) and weight decrease 50g button (10);

Trigger the preset weight 250g button, and the display unit will display 250g;

Trigger the preset weight 500g button, and the display unit will display 500g;

Trigger the button to increase the weight by 50g, and the display value of the display unit will increase by 50g;

Trigger the weight reduction 50g button, and the displayed value of the display unit is reduced by 50g.

The circuit board is provided with a power supply circuit for converting 220V alternating current into 5V direct current.

The working indicator light (3) is a green light-emitting diode, and the alarm indicator light (4) is a red light-emitting diode.

Both the operation button and the liquid medicine weight setting button are conductive rubber buttons.

The support plate is triangular, with a round hole above, and the weight sensor is welded on the lower end of the support plate; the bottom of the weight sensor is welded with a semi-circular part for connecting the hook.

Described controller is STC12C5A60S2 single-chip microcomputer.

Beneficial effect

The invention provides an early warning device for intravenous infusion, which includes a shell support plate and a hook; the shell includes a shell panel and a shell main body, and the shell panel and the shell main body are connected by screws; a weight sensor, a circuit board and a horn are arranged inside the shell main body, and the shell panel A display unit, an indicating unit, an operation button and a button for setting the weight of the liquid medicine are arranged on the top, and the display unit, the indicating unit, the operation button and the button for setting the weight of the medicine liquid are all connected with the circuit board; the support plate is connected with the weight sensor; the weight sensor is connected with the weight sensor. The connection hooks are connected, and the weight sensor and the horn are connected to the circuit board. The circuit board is provided with an amplification circuit, an AD conversion circuit and a controller. The weight sensor is connected to the amplification circuit, and the amplification circuit, the AD conversion circuit and the controller are connected in sequence. The device is simple in structure, low in cost, and easy to popularize. After using the amplifier circuit and AD conversion circuit, the accuracy of measuring the weight change of the infusion bottle (bag) is improved, and the weight of the liquid in the infusion bottle (bag) is provided in time. It provides convenience for personnel, improves work efficiency, and makes the infusion process safer.

Description of drawings

Fig. 1 is a schematic diagram of a housing panel of the present invention;

Fig. 2 is a schematic diagram of the internal structure of the housing main body of the present invention;

Fig. 3 is the schematic diagram of the single-chip microcomputer chip of control circuit;

Figure 4 is a schematic diagram of the crystal oscillator circuit;

Fig. 5 is a schematic diagram of a power supply circuit;

Fig. 6 is a schematic diagram of an amplification circuit;

The labels are: 1-housing, 2-display unit, 3-working indicator light, 4-alarm indicator light, 5-"on/off" button, 6-"reset" button, 7-preset weight 250g" Button, 8-button for preset weight 500g, 9-button for increasing weight by 50g, 10-button for reducing weight by 50g, 11-circuit board, 12-horn, 13-support plate, 14-weight sensor, 15-hook.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and the specific operation process.

An intravenous infusion early warning device, as shown in Figure 1 and Figure 2, includes a housing (1), a support plate (13) and a hook (15); the housing includes a housing panel and a housing main body, and the housing panel and the housing main body are connected by screws; A weight sensor (14), a circuit board (11) and a horn (12) are arranged inside the main body of the casing, and a display unit (2), an indicating unit, an operation button and a button for setting the weight of liquid medicine are arranged on the casing panel, and the display unit and the indicating unit , the operation button and the liquid medicine weight setting button are all connected to the circuit board; the support plate (13) is connected to the weight sensor (14);

The weight sensor is connected with the connection hook, and the speakers are connected with the circuit board. The circuit board is provided with an amplification circuit, an AD conversion circuit and a control circuit. The weight sensor is connected with the amplification circuit. The amplification circuit, the AD conversion circuit and the control circuit are sequentially connected.

The operation buttons include the "on/off" button (5) for controlling the connection and disconnection of the external power supply and the "zero reset" button (6) for clearing the display unit. Set weight 250g button (7), preset weight 500g button (8), weight increase 50g button (9) and weight decrease 50g button (10).

The controller on the circuit board is a STC12C5A60S2 single-chip microcomputer, as shown in Figure 3, its peripheral circuit is simple, and it can work with a crystal oscillator circuit (as shown in Figure 4) and a power supply, and its power circuit is shown in Figure 5. Converted to direct current, powering the device.

In order to complete the auxiliary function during infusion, the device measures the weight change of the liquid in the infusion bottle (bag) through the load cell, and obtains an analog signal; then, the signal is amplified through the amplifying circuit as shown in Figure 6, and then sent to the single-chip microcomputer As shown in Figure 3, analog-to-digital conversion processing and data processing are carried out, and finally output through the digital tube.

The power supply used in the device is a DC power supply. The appearance of the sensor in the device is cuboid, and its length, width, and height range from 4cm to 7cm, 2cm to 5cm, and 8cm to 15cm, respectively.

There is a triangular load-bearing thin steel plate with round holes on the top surface of the sensor, which is used to hang the device; a semi-circular ring buckle is welded at the bottom of the bottom surface, and a hook is connected to hook the infusion bottle (bag). The weight sensor can work normally under normal room temperature conditions, the environment is low in corrosion, and the influence of electromagnetic field is small (when using, keep away from the area with strong electromagnetic field). The sensor has a capacity of 2.5 kg and a sensitivity of 2. The sensor can measure the process of the gradual weight change of the infusion bottle (bag), and output a voltage signal to the circuit board.

The internal circuit of the device is divided into a power supply circuit, an amplifier circuit, an AD conversion circuit and a single chip microcomputer. The whole circuit cooperates with the operation button on the shell to realize the following functions:

a. Through the switch button on the shell, control the connection and disconnection of the power supply.

b. The infusion volume can be set through the selection weight button on the shell, and the initial weight is output through the digital tube through the internal circuit. Every time the button "+50" or "-50" is pressed, the data displayed on the digital tube will increase or decrease by 50. The digital tube can display numbers from 0 to 999, and "000" will be displayed if the range is exceeded.

c. The initial weight and the instantaneous weight during the infusion process are displayed by three seven-segment digital tubes. After the infusion starts, the weight gradually decreases, and the displayed number also gradually decreases.

d. Change the data in the digital tube to "0" through the reset button.

e. The circuit contains red and green light-emitting diodes. After the initial weight is preset, when the number displayed by the digital tube is greater than or equal to 20g, the green light is on; when the number displayed by the digital tube is less than 20g, the red light is on, and the warning voice is played .

f. The warning voice is "Please replace the medicine solution or stop the infusion in time!", and the warning voice will be played continuously until the "Reset" or "Switch" button is pressed.

When using the device, hang the device on a high place, prepare the infusion bottle (bag), hang it on the hook (15) at the bottom of the device, make sure that the infusion bottle (bag) is vertically downward, and do not touch other parts except the hook. object. Insert the needle of the infusion set into the patient's blood vessel, fix the needle with tape and adjust the drip rate.

Connect the power supply to the device, there is no data display on the digital tube (2) on the display unit, press the "on/off" button (5), the digital tube (2) will have a digital display, and the data at this time is the hook (15 ), the data may be hundreds of grams or "000". When it is "000", it means that it is beyond the display range of the digital tube, not necessarily beyond the range of the device. When it is confirmed that the infusion bottle (bag) has no other external force except gravity and the pulling force of the hook (15), perform the following operations.

Before selecting the weight, press the "Reset" button (6), and the digital tubes (2) will all display "0". Then use the weight button on the interface to select the weight of the liquid medicine. It does not need to be accurate to the gram, and the error should not exceed 15 grams. The weight can be set according to the volume of the liquid. For example, if the liquid to be infused is 250ml of 25% glucose solution, it is only necessary to press the "250" g button (7). If you want to lose 100ml, you can press the "+50" g button (9) twice after pressing the "Reset" button (6), and the digital tube (2) can display "100" g.

After the weight is selected, the device starts to work automatically, the green light (3) of the working indicator light is on, and the number on the digital tube will gradually decrease. When the number is less than 20 grams, the speaker (11) will play a voice prompt "Please replace it in time liquid medicine or stop the infusion!", the green light (3) of the working indicator light goes out, and the red light (4) of the warning light turns on. Medical staff came to change the dressing or terminate the infusion.

The device can display the remaining weight of the liquid medicine through the digital tube during the infusion process, and when the infusion is about to end, it will play an alarm voice, light up the warning light, and notify the medical staff and patients to replace the liquid medicine or terminate the infusion in time.

Claims (10)

1. a venous transfusion prior-warning device is characterized in that, comprises shell (1), gripper shoe (13) and hook (15); Shell comprises housing face-plate and housing main body, and housing face-plate links to each other by screw with housing main body; Housing main body inside is provided with weight sensor (14), circuit board (11) and loudspeaker (12), housing face-plate is provided with display unit, indicating member, action button and medicinal liquid weight button is set, and display unit, indicating member, action button and medicinal liquid weight arrange button and all links to each other with circuit board; Gripper shoe links to each other with weight sensor;

Described weight sensor links to each other with coupling hook, weight sensor all links to each other with circuit board with loudspeaker, described circuit board is provided with amplifying circuit, A/D convertor circuit and controller, and weight sensor links to each other with amplifying circuit, and amplifying circuit, A/D convertor circuit and controller link to each other successively.

2. venous transfusion prior-warning device according to claim 1 is characterized in that, the length of described shell is 10～15cm, and wide is 5～8cm, and thick is 4～7cm.

3. venous transfusion prior-warning device according to claim 1 and 2 is characterized in that, described display unit comprises 3 charactrons at least.

4. venous transfusion prior-warning device according to claim 1 is characterized in that, described indicating member comprises relay indicating light (3) and alarm lamp (4).

5. venous transfusion prior-warning device according to claim 1, it is characterized in that, described action button comprises for " open close " button (5) of access and the disconnection of control external power source and is used for " zero clearing " button (6) of zero clearing display unit that described medicinal liquid weight arranges button and comprises that preset weight 250g button (7), preset weight 500g button (8), weight increase 50g button (9) and weight minimizing 50g button (10);

Trigger preset weight 250g button, display unit is shown as 250g;

Trigger preset weight 500g button, display unit is shown as 500g;

Triggering weight increases the 50g button, and the show value of display unit increases 50g;

Trigger weight and reduce the 50g button, the show value of display unit reduces 50g.

6. venous transfusion prior-warning device according to claim 1 is characterized in that, described circuit board is provided with the 220V alternating current is converted into the galvanic power circuit of 5V.

7. venous transfusion prior-warning device according to claim 4 is characterized in that, described relay indicating light (3) is green LED, and described alarm lamp (4) is the emitting red light diode.

8. venous transfusion prior-warning device according to claim 5 is characterized in that, described action button and medicinal liquid weight arrange button and is conductive rubber formula button.

9. venous transfusion prior-warning device according to claim 1 is characterized in that, described gripper shoe is triangle, and the top is provided with circular hole, and weight sensor is welded on the lower end of gripper shoe; The bottom welding of weight sensor is useful on the semicircular ring parts of coupling hook.

10. venous transfusion prior-warning device according to claim 1 is characterized in that, described controller is the STC12C5A60S2 single-chip microcomputer.

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