CN103961762A - Intelligent transfusion device and control method thereof - Google Patents

Abstract

The invention discloses an intelligent infusion device and a control method thereof. The device is provided with a box, and an airtight mechanism is installed in the box. A gas pressure sensor, an air pump, and an exhaust valve are installed on the airtight mechanism. Photocoupler, heater, stepper motor and temperature sensor, the photocoupler is connected to the infusion catheter, and the infusion catheter is also connected to the heater to heat the liquid in the infusion catheter. The output of the stepper motor The shaft is connected with the catheter clamping mechanism for clamping the infusion catheter, the temperature sensor is used for detecting the temperature of the output liquid, a key module and a display module are installed on the side wall of the box body, and a control circuit is also arranged in the box body. Its remarkable effects are: complete functions, easy to use, integration of air pressure compensation, temperature compensation, liquid anomaly detection, alarm and other functions, which facilitates the absorption of liquid medicine, improves the comfort of patients during infusion, and reduces the probability of medical accidents.

Description

Intelligent infusion device and its control method

technical field

The invention relates to the field of medical devices, in particular to an intelligent infusion device and a control method thereof.

Background technique

At present, major hospitals and community diagnosis and treatment units all adopt disposable infusion sets to infuse patients. However, current disposable infusion sets have the following problems during use:

(1) It is necessary to hang the infusion bag on a higher level to ensure the normal delivery of the liquid medicine, causing inconvenience for the patient to move during the infusion. If the patient needs to go to the toilet or move around in a small area, usually one person is needed to assist the infusion bag to maintain the higher level , very inconvenient to use.

(2) Patients or nurses are required to manually monitor whether the liquid medicine is infused in real time, and when the infusion is over, it is necessary to manually call the medical staff;

(3) In an environment with low external temperature, the input of supercooled medicinal liquid into the human body will bring great stimulation to the patient's body, and is not conducive to the absorption of the drug.

With the rapid development of the medical Internet of Things, various new-generation electronic medical devices are hitting the market in large numbers. In this context, relying on the wide application of medical Internet of Things technology, intelligent control and detection technology, such as a portable infusion monitor disclosed in Chinese Patent Publication No. CN101073680A, it is a wireless alarm that is closed by motor However, the disadvantage of this invention is that its function is relatively single, it cannot realize air pressure compensation and temperature compensation, and it cannot detect abnormality of medicinal liquid.

Contents of the invention

In order to overcome the above defects, the first object of the present invention is to provide an intelligent infusion device with low cost, easy to use, and capable of realizing functions such as air pressure compensation, temperature compensation, and abnormal detection of medicinal liquid.

In order to achieve the above object, the concrete technical scheme adopted in the present invention is as follows:

A kind of intelligent transfusion device, its key is: setting box body, and airtight mechanism is installed in this box body, and this airtight mechanism is used for accommodating transfusion bag, and gas pressure sensor is installed on described airtight mechanism, in the airtight mechanism An air pump is connected to the intake pipe, and an exhaust valve is arranged on the exhaust pipe of the airtight mechanism. A photocoupler, a heater, a stepping motor and a temperature sensor are also installed in the box, and the photocoupler and The infusion catheter is connected to each other to detect whether the liquid in the infusion bag has been delivered. The infusion catheter is also connected to the heater to heat the liquid in the infusion catheter. The output shaft of the stepping motor is connected to the The catheter clamping mechanism is connected to clamp the infusion catheter. The temperature sensor is used to detect the temperature of the output liquid. A key module and a display module are also installed on the side wall of the box body, and a control panel is also installed in the box body. circuit.

Using the above scheme, the infusion bag is placed in the airtight mechanism, and the air pump can be controlled according to the detection status of the gas pressure sensor, so that a certain air pressure can be maintained in the airtight mechanism to ensure a certain pressure difference with the blood vessels of the human body. Changes in the height or liquid quality of the infusion bag will not cause blood backflow; using the cooperation of photocouplers and stepping motors, on the one hand, it can detect whether the liquid medicine is abnormal, on the other hand, it can detect whether the liquid has been delivered, and then stop automatically Infusion: the combination of a temperature sensor and a heater can provide temperature compensation in cold winter to prevent the inflow of supercooled liquid from causing discomfort to the human body. Through the button module and display module, better man-machine exchange can be achieved. The equipment has perfect functions and is easy to use. It is convenient and meets the needs of current smart medical care.

As a further description, the optocoupler is a slot-type optocoupler with a notch width of 4mm, and the infusion catheter is snapped into the notch of the optocoupler.

To further describe, the heater includes 3 heating modules with notches, and the 3 heating modules are distributed in the shape of "pin" in the box.

In order to facilitate the installation of the infusion bag, the airtight mechanism is a box structure or an air bag, and an insertion hole for an infusion catheter is arranged on the airtight mechanism.

In order to facilitate carrying and hanging, the box body is also provided with a handle.

In order to ensure accurate operation of each circuit module, the control circuit includes a controller and a drive circuit, and the detection signal output by the photocoupler is sent to the controller after being compared with a reference voltage by a voltage comparator.

In order to perform alarm and remote call when the liquid medicine is delivered, an alarm circuit and a wireless communication module are also connected to the controller.

Combined with the description of the above circuit and installation structure, the present invention also provides a control method for the above intelligent infusion device, specifically:

The control circuit detects the air pressure in the airtight mechanism through the gas pressure sensor, and maintains the air pressure in the airtight mechanism within the range of V1-V2 by controlling the air pump;

The control circuit detects the temperature of the liquid in the infusion catheter through a temperature sensor, and controls the temperature of the liquid in the infusion catheter to be constant at 30°C, 34°C or 37°C by controlling the heater;

The control circuit detects whether the liquid in the infusion bag is delivered through the photocoupler. When the liquid in the infusion bag is delivered, the control circuit controls the rotation of the stepping motor to make the infusion cut-off mechanism work and stop the liquid in the infusion catheter. flow.

Notable effect of the present invention is:

It has perfect functions and is easy to use. It integrates functions such as air pressure compensation, temperature compensation, liquid anomaly detection, and alarm to facilitate the absorption of liquid medicine, improve the comfort of patients during infusion, and reduce the probability of medical accidents.

Description of drawings

Fig. 1 is a schematic diagram of the installation structure of the present invention;

Fig. 2 is a schematic block diagram of the circuit of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figure 1, an intelligent infusion device is provided with a box body 1, and an airtight mechanism 2 is installed in the box body 1, and the airtight mechanism 2 is used to accommodate an infusion bag. In this example, an air bag is used as the The airtight mechanism 2, of course, can also adopt a box structure, as long as it is ensured that an airtight space is formed between the infusion bag and the airtight mechanism 2 after the infusion bag is put in and the infusion catheter is drawn out. Therefore, the airtight mechanism 2 is provided with an insertion hole for an infusion catheter, and usually a sealing ring or a gasket is provided in the insertion hole. In order to facilitate lifting and hanging, a handle 13 is also provided on the box body 1 .

In order to realize the air pressure adjustment in the airtight mechanism 2, a gas pressure sensor 3 is installed on the airtight mechanism 2, an air pump 12 is connected to the air inlet pipe of the airtight mechanism 2, and an air pump 12 is arranged on the exhaust pipe of the airtight mechanism 2. There is an exhaust valve 11, and the air pressure in the airtight mechanism is detected by the gas pressure sensor 3. As the weight of the liquid decreases or the height of the airtight mechanism 2 changes, the air pressure is compensated by the air pump 12. Usually, the exhaust valve 11 is only Open it when the liquid delivery is completed, avoiding the impact caused by the high air pressure inside the airtight mechanism 2 when changing the infusion bag, and during the infusion process, since the height of the infusion bag does not change too much, it is unnecessary to control the exhaust valve 11 frequently Ensure air pressure balance, thereby reducing the complexity of control.

1 and 2, it can also be seen that a photocoupler 4, a heater 5, a stepper motor 7 and a temperature sensor 9 are also installed in the casing 1, and the photocoupler 4 is interlocked with the infusion catheter. It is used to detect whether the liquid in the infusion bag has been delivered. The infusion catheter is also clamped in the heater 5 for heating the liquid in the infusion catheter. The output shaft of the stepping motor 7 is connected with the catheter clamp It is connected with the closing mechanism for clamping the infusion catheter. The temperature sensor 9 is used to detect the temperature of the output liquid. A key module 8 and a display module 10 are also installed on the side wall of the box body 1. Inside the box body 1 A control circuit 6 is also provided.

Combined with the size of the tube body of the infusion catheter, the photoelectric coupler 4 is a slot-type photocoupler with a slot width of 4mm, and the infusion catheter is clamped in the slot of the photocoupler 4 .

In order to ensure the heating performance, the heater 5 includes 3 heating modules with notches, and the 3 heating modules are distributed in the shape of "pin" in the box body 1 .

It can also be seen from Fig. 2 that in order to realize intelligent control, the control circuit 6 includes a controller 61 and a drive circuit 62, and the detection signal output by the photocoupler 4 is sent to the device after being compared with a reference voltage by a voltage comparator. In the above-mentioned controller 61, an alarm circuit 63 and a wireless communication module 64 are also connected to the controller 61. When the medical solution is delivered or other circumstances need to call medical staff, the alarm circuit 63 and the wireless communication module 64 can be used. Remote call and alarm.

Combining the circuit features and structural features adopted in this embodiment, the control method of the intelligent infusion device is as follows:

The control circuit 6 detects the air pressure in the airtight mechanism 2 through the gas pressure sensor 3, and maintains the air pressure in the airtight mechanism 2 within the range of V1-V2 by controlling the air pump 12; in this example, by checking the gas pressure The voltage value output by sensor 3 is used to determine the air pressure. The voltage range in this example is 3.4V~4.2V, and the corresponding air pressure range is 11.4349kPa~14.1259kPa. Changes in drop rate are also negligible.

The control circuit 6 detects the temperature of the liquid in the infusion catheter through the temperature sensor 9, and controls the liquid in the infusion catheter at a constant temperature of 30°C, 34°C or 37°C by controlling the heater 5, and by setting three temperature levels The heating power is about 30.81W, 46.21W and 61.61W respectively to meet the needs of different liquid medicines;

The control circuit 6 detects whether the liquid in the infusion bag is delivered through the photocoupler 4, and when the liquid in the infusion bag is delivered, the control circuit 6 controls the rotation of the stepper motor 7, so that the infusion shut-off mechanism works, and the infusion is stopped Fluid flow in conduits.

In the specific working process, the infrared tube on one side of the photocoupler 4 can emit infrared light with continuous wavelength, and when the photocoupler triode on the other side receives infrared light of different intensities, it will conduct and generate an induced current. According to the theory of light absorption, different substances have different absorption coefficients for light, so the turbidity of the liquid medicine in the catheter is different, and the absorption of infrared light is different with or without liquid medicine, resulting in different induced currents received and generated by the optocoupler triode. Through a large number of experiments, the signal value range under normal conditions of the drug solution and the signal value of the catheter without the drug solution were measured. When the system is just started and the liquid medicine is put into the device, the system will compare the collected signal value with the normal range, and if it is not within the range, it will immediately alarm to indicate that the liquid medicine is abnormal. During normal infusion, if the signal generated by the photoelectric detection module exceeds the threshold, it can be recognized by the control circuit 6 and remotely alarmed by the wireless communication module 64, and the stepper motor 7 is driven to automatically clamp the catheter and an alarm is given by the LED and the buzzer.

Finally, it should be noted that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (8)

1. an intelligent infusion device, it is characterized in that: casing (1) is set, and airtight mechanism (2) is installed in this casing (1), and this airtight mechanism (2) is used to hold transfusion bag, described A gas pressure sensor (3) is installed on the airtight mechanism (2), an air pump (12) is connected to the air inlet pipe of the airtight mechanism (2), and an exhaust pipe is arranged on the exhaust pipe of the airtight mechanism (2). Valve (11), in the box (1) also installed photocoupler (4), heater (5), stepper motor (7) and temperature sensor (9), the photocoupler (4 ) is clamped with the infusion catheter for detecting whether the liquid in the infusion bag is finished, and the infusion catheter is also clamped in the heater (5) for heating the liquid in the infusion catheter, and the step The output shaft of the motor (7) is connected with the conduit clamping mechanism for clamping the infusion conduit, the temperature sensor (9) is used to detect the temperature of the output liquid, and is also installed on the side wall of the box (1) There are a key module (8) and a display module (10), and a control circuit (6) is also arranged in the box body (1). 2. The intelligent transfusion device according to claim 1, characterized in that: the photoelectric coupler (4) is a slot-type photocoupler, the notch width is 4mm, and the transfusion catheter is clamped on the photocoupler (4). ) notch. 3. The intelligent infusion device according to claim 1, characterized in that: the heater (5) includes 3 heating modules with notches, and the 3 heating modules are in the shape of " Product" font distribution. 4. The intelligent infusion device according to claim 1, characterized in that: the airtight mechanism (2) is a box structure or an air bag, and the airtight mechanism (2) is provided with an insertion hole for an infusion catheter. 5. The intelligent infusion device according to claim 1, characterized in that: a handle (13) is also provided on the box body (1). 6. The intelligent infusion device according to any one of claims 1-5, characterized in that: the control circuit (6) comprises a controller (61) and a drive circuit (62), and the photocoupler (4) The output detection signal is sent to the controller (61) after being compared with a reference voltage by a voltage comparator. 7. The intelligent infusion device according to claim 6, characterized in that: an alarm circuit (63) and a wireless communication module (64) are also connected to the controller (61). 8. A control method for an intelligent infusion device as claimed in claim 1, characterized in that: said control circuit (6) detects the air pressure in the airtight mechanism (2) through a gas pressure sensor (3), and controls the The air pump (12) maintains the air pressure in the air-tight mechanism (2) within the range of V1-V2; The control circuit (6) detects the temperature of the liquid in the infusion catheter through the temperature sensor (9), and controls the temperature of the liquid in the infusion catheter to be constant at 30°C, 34°C or 37°C by controlling the heater (5); The control circuit (6) detects whether the liquid in the infusion bag is delivered through the photocoupler (4), and when the liquid in the infusion bag is delivered, the control circuit (6) controls the rotation of the stepper motor (7), The infusion shut-off mechanism is made to work, and the liquid flow in the infusion catheter is stopped.