Abstract: Objective To design a ventilator operating condition monitoring system based on the medical equipment rental center to record and analyze the operating status of the ventilator. Methods Based on MSP430 MCU, the embedded module was developed, and the ventilator running status information was collected and sent to the server of the medical equipment rental center. The application software was designed based on Visual Studio C# development platform to receive the ventilator running status data and perform it. analysis. Results The system can collect and store the operating status information of the ventilator in real time, and monitor and analyze the operating status of the ventilator. Conclusion The application of this system improves the real-time quality monitoring capability of the ventilator. The ventilator is a clinical emergency and life support device widely used in clinical treatment such as first aid, anesthesia, respiratory maintenance and treatment, and postoperative recovery. It can effectively improve the patient's lung ventilation and rapidly increase oxygen inhalation and carbon dioxide emissions. Efficiency, whether its parameter setting is reasonable, whether the performance is stable, whether the environment is suitable, and whether the monitoring is accurate, directly affects the patient's diagnosis and treatment effect and even life safety. In the ISO-14971 medical device risk specification, the ventilator has the highest risk score and is a high-risk medical device, so its clinical safety and stability are also of concern. With the rapid development of electronic technology, more and more devices have their own fault diagnosis systems, and even reserved interfaces to facilitate the remote monitoring of equipment status by technicians, providing a powerful technical guarantee for real-time monitoring of equipment operating status. Based on the medical equipment leasing center and the medical measurement three-level station, this research researches and designs the real-time monitoring system of the ventilator operating status based on embedded and Internet of Things technologies. The following is an example of the operating status monitoring process of the PB840 ventilator. Research and design process. 1 overall design 1.1 Data types that the PB840 ventilator can monitor There are 3 RS232 serial ports on the lower right side of the back of the PB840 ventilator display. The supporting manuals describe the technical parameters such as the communication parameter setting method, communication command and feedback data format of the serial port, and the ventilator that can be monitored according to the relevant content. The operating status information is divided into the following categories: 1 information about the ventilator itself, such as the ventilator ID number, internal time and date, breathing tube type and inner diameter, type and capacity of the humidifier, whether the oxygen sensor is turned on, etc.; 2 user settings Static parameters, including the set breathing parameter values, such as breathing mode, breathing rate, trigger mode, tidal volume, plateau duration, etc.; and alarm information settings, such as minute expiratory volume, expiratory tidal volume, call Alarm limits for parameters such as air pressure and expiratory frequency; 3 Dynamic monitoring record information, including respiratory parameter values ​​monitored by the internal sensors of the ventilator, such as respiratory rate, minute expiratory volume, peak airway pressure, and average airway pressure Etc; and patient respiratory parameter values ​​estimated from sensor measurements, such as estimated total resistance, patient resistance, patient Elasticity, patient compliance, etc.; 4 alarm information, mainly refers to the alarm information generated by the ventilator when abnormal operation is detected, including suffocation ventilation, excessive minute expiratory volume, excessive expiratory tidal volume, high respiratory pressure, AC power supply Alarm information such as loss, low battery, low oxygen concentration. 1.2 The overall architecture of the system The ventilator operating state monitoring system is mainly composed of a data acquisition and storage module, a wireless data transceiver module, and a server of a medical equipment rental center. The data acquisition and storage module based on embedded and IoT technology can collect the operating status information of the ventilator regularly and store it in its own memory. When the ventilator is returned to the medical equipment rental center, the server side While registering and returning the information, the application software can read and analyze the ventilator operating state data stored in the data acquisition and storage module through the wireless network, and then feed the analysis result back to the clinical engineer; the engineer returns the feedback result according to the feedback result. The ventilator performs self-inspection, maintenance, metrological verification, etc. to ensure the safety and reliability of the ventilator operation. The overall architecture diagram is shown in Figure 1. Figure 1 Overall architecture of the ventilator operating condition monitoring system 2 hardware design and implementation process The hardware of the ventilator operating state monitoring system mainly includes two parts: data acquisition and storage module and wireless data transceiver module. 2.1 Data Acquisition and Storage Module The data acquisition and storage module (Fig. 2) is connected to the ventilator. It is mainly composed of RS232 serial communication module, MSP430 single-chip module, CC1101 wireless communication module, 5 V DC switching power supply, lithium battery and charging module, power switching circuit, etc. The hollow two-way arrows represent the flow of data in the system, and the black solid arrows represent the power supply direction of the system. The 5 V DC switching power plug, the ventilator power plug, and the humidifier power plug in the power circuit are connected to the power strip on the back of the ventilator. The operator of the clinical department first uses the ventilator when using the ventilator. When connected to the mains, the data acquisition and storage module will be powered on synchronously with the ventilator. Figure 2 Schematic diagram of data acquisition and storage module Teeth Pack,Dental Pack,Dental Drape Packs,Disposable Dental Surgery Pack ShaoXing SurgeCare Medical Products Co., Ltd. , https://www.sxsurgecaremedical.com
