This is a very professional question
I only know about disposable infusion pumps
Attachment: Intelligent medical infusion pumps and their applications
1. Introduction
With the development of science and technology, more and more fields require precise control of fluid flow or flow rate, such as the detection and analysis of trace chemical elements in the chemical industry. Flow needs to be precisely controlled. In the field of medical care, the flow rate and flow rate of traditional Chinese medicine sometimes need to be precisely controlled.
Intravenous infusion is the most commonly used clinical treatment method and a common drug delivery treatment technology in the nursing profession. Clinically, appropriate infusion speed should be determined based on the drug and patient conditions. If the infusion is too fast, it may lead to poisoning, and in more severe cases, it may lead to edema and heart failure;
If the infusion is too slow, the amount of medicine may be insufficient or the infusion time may be extended unnecessarily, affecting the treatment and causing serious harm to the patient and the patient. Nursing work adds unnecessary burden. For routine clinical infusion, hanging bottles are commonly used for infusion, and observation is done with eyes, and manual clamps are relied on to control the drop speed. It is not easy to accurately control the infusion speed, and the workload is large.
Chemotherapy for cancer patients and rescue treatment for critically ill patients require the infusion of drugs at a constant speed. By adjusting the input speed and time, the chemotherapy drugs can be injected evenly and continuously to achieve the best effect of chemotherapy and Can minimize the side effects of chemotherapy drugs.
People with diabetes suffer from pain and need to inject a certain amount of insulin at a certain speed. The previous method was basically to inject a larger dose of insulin at one time, which not only caused huge waste, but also had a short effect time. Therefore, there is a great need for a continuous delivery device with controllable flow and flow rate to deliver a small amount of medicine. And precisely control its conveying speed and flow rate.
When delivering certain special drugs, such as anesthetics, antihypertensive drugs nitroprusside, TPN (pyridine triphosphate), etc. to the elderly, children and those with weak constitutions, the infusion speed and dosage are particularly important. Careful and precise control is required, otherwise there will be serious consequences.
Blood coagulates very easily, and it is easy to block the infusion tube during blood transfusion. It is necessary to ensure that the blood flow velocity is greater than a certain value in order to achieve a smooth blood transfusion.
In addition, whether it is infusion or blood transfusion, ordinary infusion sets cannot automatically alarm after the infusion is completed or occur accidentally during the infusion process, such as bubbles, obstructions, etc., nor can they cut off the infusion path in time, thus causing adverse effects. as a result of. It should be dealt with promptly to avoid blood backflow or other consequences.
Therefore, it is necessary to use an intelligent infusion pump to control the delivery of medicinal liquid and provide abnormal alarm.
2. Functions of intelligent infusion pumps
Intelligent medical infusion pumps can meet the needs of multiple functions. To sum up, the infusion pump can achieve the following functions:
< p>(1) The infusion speed can be accurately measured and controlled;(2) The infusion volume can be accurately measured and controlled;
(3) The liquid flow has good linearity and does not produce pulsation. ;
(4) Can alarm for abnormal situations such as bubbles, empty liquid, leakage, abnormal heart rate, and infusion tube obstruction, and automatically cut off the infusion path;
(5) Implementation Intelligent control of infusion.
3. System structure of intelligent medical infusion pump
The intelligent infusion pump system mainly consists of the following parts:
Microcomputer system, pump device, Detection devices, alarm devices and input and display devices. Figure 1 is the system structure block diagram of the intelligent infusion pump.
1. Microcomputer system: It is the "brain" of the entire system. It intelligently controls and manages the entire system and processes detection signals. Generally, a single-chip microcomputer system is used.
2. Pump device: It is the "heart" of the entire system and the power source for transporting liquid. There are many types of pump devices, which are explained in detail later.
3. Detection device:
Mainly various sensors, such as infrared drop sensor (responsible for detecting liquid flow rate and flow rate), pressure sensor (responsible for clogging and leakage) Detection) and ultrasonic sensors (responsible for the detection of bubbles), etc., which can sense corresponding signals. After amplification, these signals are sent to the microcomputer system for signal processing, and control instructions are obtained, and then corresponding control operations are performed.
4. Alarm device:
After the signal sensed by the sensor is processed by the microcomputer, an alarm control signal is obtained, and then the alarm device responds to attract people's attention and perform correct actions at the same time. deal with. There are mainly photoelectric alarms (light-emitting diodes) and audible alarms (speakers and buzzers).
5. Input and display device:
The input part is responsible for setting various parameters of infusion, such as infusion volume and infusion speed. The display part is responsible for displaying various parameters and current working status, etc., and mostly uses LED digital tube display and LCE liquid crystal display.