Using advanced technology to provide the most advanced, timely and thoughtful medical services, to establish a better industry image, and efficient service for patients is the purpose of the medical industry. At present, the rapid development of wireless network communication technology and image compression processing technology, the improvement and improvement of security prevention system and monitoring technology have created conditions for the construction of a new medical diagnosis and nursing system. Especially in the field of telemedicine and medical monitoring applications, we can use the latest technology to build a system that is more suitable for remote consultation, remote field monitoring, remote surgery guidance, local area intensive care, post-operative care, emergency care, off-site care monitoring and other systems. Supplement and improve existing medical monitoring methods. The continuous maturity and improvement of various technologies of WLAN (Wireless Local Area Network) make it possible to build a wireless diagnostic-based medical diagnosis and care system within a certain distance. The WiFi IEEE 802.11 protocol family based on one of the wireless connection technologies can realize the wireless transmission of medical images and data in a certain space. In particular, the 802.11n wireless technology provides a guarantee for wirelessly transmitting high-definition images, combined with application interconnection. The protocols DLNA, IGRS, and UPnP enable wireless identification, connection, networking, and interconnection between various medical digital terminal devices, particularly mobile devices.
Based on WLAN wireless technology, this paper proposes application models and solutions for future medical care diagnosis and monitoring systems, and analyzes the possibility of replacing traditional analog CCTV systems and digital DVR systems, and makes a new medical diagnosis and care system for the future. description.
2. System design and implementationAs people's living standards increase, the demand for health and the treatment of medical treatment are getting higher and higher. From the perspective of application requirements, the security monitoring of hospital outpatients and inpatient buildings, the 24-hour monitoring of patients in wards and intensive care units, the observation of surgery in operating rooms, and the joint consultation of doctors are all inseparable from medical monitoring electronic equipment. Especially the most direct application is the number of critical emergency wards and operating rooms. The hospital urgently needs to use the ward, operating room, etc. as the primary monitoring place, and implement real-time full-time monitoring of each operation and patients in each ward. In this way, not only the efficiency of diagnosis and treatment is improved, but also the standardized management of the hospital is improved, the diagnosis and treatment of patients is improved, and the monitoring process is saved. It also helps to resolve medical disputes and clarify responsibilities.
At present, the medical monitoring systems that most hospitals have placed are mainly call phones, video equipment and electronic buttons for alarms in the ward. They constitute the main framework of the current hospital medical monitoring system, with fixed-point and fixed monitoring features. This electronic monitoring device fixed-place mode medical diagnostic care monitoring system has many shortcomings in various situations that may occur in the medical process compared with the movable, random-placed mode. 1. When the ward is not enough, the temporary ward cannot be randomly set and placed; 2. When the monitoring point is added, the existing equipment cannot be used for adjustment; 3. When the hospital is informatization construction, the existing building must be slanted and routed, and the construction process Affect normal work; 4, wiring increases wire consumption and maintenance costs. By using wireless technology to build a medical diagnosis and care monitoring system, the above problems can be avoided, and the management and environment of the hospital can be improved.
2.1, the overall structure of the next generation medical monitoring system
The medical video surveillance system is an important part of the hospital information system. The data collected is important for medical decision making and medical services. The recording of the video image retains the data of the patient's maximum amount of information. From simple calls to real-time video data transmission, surgical monitoring, remote consultation, bracelet monitoring, SMS monitoring, constitute a three-dimensional medical monitoring information network. as the picture shows.
The next generation of medical monitoring system architecture
2.2, wireless medical video surveillance system details
The following figure presents the architecture of a wireless medical video surveillance system based on WiFi 802.11.
Wireless medical video surveillance system architecture based on WiFi 802.11
Through the architecture of broadband wireless local area network (WIFi), 802.11 as the wireless connection protocol, support the interconnection protocol DLNA, IGRS, and even UPnP, support the use of video surveillance equipment supporting wireless broadband routing, set the wireless camera in the ward designated monitoring point, through the wireless The router transmits the image to the monitoring screen of the nurse station, so that doctors and nurses can observe the actual situation of the patient in the ward and perform real-time monitoring while interfacing with the patient. At the same time, the wireless security storage system (WSS) is configured. The images transmitted over the air can be automatically received so that the on-duty doctor and the attending doctor can know the patient's condition and status off-site, and even obtain the real-time images needed to retrieve and query the historical images via the Internet. The system can also add multiple monitoring points to the patient wirelessly according to the doctor's request, and perform flexible on-demand monitoring. The devices in the figure all have interfaces with the local area network, and can be connected to the network through wired means to form various solutions, and can be integrated with the hospital's current hospital information management system, mobile communication, and the Internet.
802.11n transmission distances up to 200 meters, to meet the needs of general hospitals and inpatient buildings. The actual transmission speed of 802.11n can reach above 108M bps, that is, it can transmit about 13.5M per second, which is the highest speed specification of wireless networks. This speed has been able to meet the requirements of high definition. Ordinary 100M wired environment, the theoretical speed is 100M bps, that is, the data stream of about 10M per second, can also achieve high definition requirements. Therefore, building a wireless medical video surveillance system is more advantageous in terms of technical performance than wired local area networks.
The most important feature of the system is the use of a wireless camera (constituting a monitoring site), a wireless monitoring screen (WLCD), and a wireless security data storage array hard disk group WSS (monitoring data center), a wireless hub (WSwitch), and the like to form a main body of the monitoring system. The advantage is that it is easy to deploy and can be dynamically configured. It can be set up wherever video is needed, even in any inpatient and emergency room of the hospital. The wireless camera can transmit video images to the network in real time through a wireless router deployed within a hundred meters.
(1) Monitoring Center
It can be configured with a large LCD screen or a number of PCs as monitoring hosts, and comprehensive medical video surveillance management through browser or monitoring management software. Hospitals, departmental doctors monitor the scenes in the monitoring center, or in their respective offices, via a wired or wireless network, using a display, computer or handheld wireless mobile TV terminal. Configure the Wireless Secure Data Storage Array Hard Disk (WSS) to complete monitoring image reception, recording, and storage. A single WSS can store 80 channels of audio and video simultaneously. It can be scheduled on the storage host at a set time schedule. A single wireless hub ME3400 can access 256 devices, and a single WSS can access 32 devices. In the actual application environment, a single ME3400 can access 50 devices and can access 3 WSSs.
WSS features:
1. Support open standard protocols
Support wireless 802.11b/g/nWiFi protocol, support TCP/IP network protocol, support NFS, CIFS, SMB protocol, realize Windows and Unix file sharing services.
2, large capacity, flexible expansion
WSS supports 2 to 5 hard disks and supports up to 5T capacity. Users can flexibly expand as needed. With plug-and-play functionality, deployment is fast and flexible. The system can adopt a two-machine fault-tolerant structure. When the system capacity reaches the maximum, the user only needs to connect another WSS into the network to immediately expand the capacity. The system front-end server does not need to be shut down, and the increase of the system capacity does not affect the normal operation of the system service. . Similarly, when the current host processing power is insufficient, the system can increase the front-end host at any time.
3, stable and reliable, high security
Based on ARM and LINUX platform development, embedded system built-in FLASH, hardware data encryption, RAID technology, automatic backup and virus protection measures to ensure the user's system stability and data security.
4, cost-effective, low TCO (Total Cost of Ownership)
(2) Monitoring site
The camera part is the original signal source of the system. The quality of the camera part and the quality of the generated image affect the quality of the entire monitoring system. Configure the GW S200 wireless camera to complete image capture, compression, and transmission. The number and location of GW S200 cameras in the ward, operating room and treatment room can be determined according to the actual situation. Wireless cameras have now implemented two key technologies, H.264 and 802.11n. H.264 ensures high image clarity, while 802.11n ensures that high-definition, high-capacity images can be transmitted over the network faster.
3. ConclusionIn this paper, the demand for high-quality video and highly flexible configuration in the future medical industry is put forward by fully utilizing the current advanced wireless video capture technology, wireless secure data storage technology, streaming media transmission technology, Internet technology and mobile network technology. The overall architecture of the next-generation wireless medical monitoring system, designed the next-generation medical video surveillance system, provides a solution for building the next-generation medical video surveillance system, providing a means of transmitting and storing images using wireless technology in the field of medical video surveillance. Flexible and diverse application model, laying a good foundation for the clinical application of the next generation wireless medical monitoring system
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