First, the hospital construction overview
The hospital department of a tertiary hospital, began construction of a new hospital in 2004, from the original city center location to move to the center of the new planning city, the new hospital covers an area of 228 acres, construction area of 192,000 square meters, designed beds of 1,500, to the end of October 2007 has been the overall opening. The new hospital design network information points more than 10,000, involving the entire hospital three buildings, network cabling design using computer network information points and telephone communications integration of six types of wire design, the hospital's internal network and the external network (connected to the INTERNET) physical separation design. Three buildings **** design 70 weak room for the installation of access layer switches, the host room and each weak room at least three four-pistil indoor fiber optic connection, each weak room from any network information point of the line routing distance of not more than 100 meters. Between the building does not exceed 500 meters using multi-mode outdoor fiber, more than 500 meters using single-mode outdoor fiber connection.
Second, different functional areas of information point coverage
The diversity and complexity of the hospital's functional zoning determines the hospital network information coverage is different from other office buildings. According to the hospital's current application needs and consider the future growth of computer applications appropriate redundancy, while in the design process of the weak power project comprehensive use of the department and the hospital infrastructure department of the views of the continuous change of the coverage requirements, and ultimately the formation of different functional areas of the design of the information point coverage requirements. In the construction process of the weak electricity project, the use of the department combined with the actual environment, and the information point coverage of further modification requirements. The information point coverage takes into account not only the application of future clinical information system, but also the network access of medical equipment and intelligent devices. Comprehensive the whole process, to the new hospital officially opened .
The main functional areas of network information point coverage is shown in Table 1.
Table 1 Main functional areas of network information point coverage table
Functional division
Number of information points
Use
Residency offices
Intranet 16
Doctor's workstations, electronic medical records, etc.
Inpatient Nurse's Office6 intranets
Nurse's workstations, electronic medical records, etc.
Corridor ceilings in wards
1 intranet every 20 meters
Wireless coverage in the wards
Office of the Chief of Residency
One internal and external intranet each
HIS application and connection to the extranet
Office of the chief nurse1 intranet
Nurse workstations, electronic medical records, etc.
Office of the attending physician
1 intranet
Doctor workstations, electronic medical records, etc.
Showroom
6 intranets
Student learning and work
General ward
One extranet
Internet connection, standby
VIP ward
One extranet
Internet connection, open
Intensive care unit
Three intranets per bed, two in the boom and one in the wall
Monitoring equipment connection
Internet connection
Internet connection
Internet connection for students' study and work p>Inpatient lobby
1 intranet
Touch screen
Outpatient clinic
2 intranets
Outpatient doctor's workstations, 1 in reserve and 1 in use
Above the doorframe of the outpatient clinic
1 intranet
Queuing information display
Consultation area pre-screening
4 intranets
Patient services
Triage and queuing management
Outpatient registration and charging
2 intranets per 1.2 meter counter
1 for charging, 1 for Union Bank's POS
Outpatient hall
8 intranets
Self-service registration and printing of test slips, touch screen
Operating theater
Intranet 6, of which 2 are located in the boom
Anesthesia monitoring equipment and computers, medical imaging
Resuscitation room
1 intranet per bed, located in the equipment belt
Anesthesia monitoring equipment
Radiology Reporting Room
Intranet 24
PACS, computerized reading reports
Radiology machine room Control room
4 intranets
Radiology equipment and computer connection
Radiology machine room above the door frame
1 intranet
Queuing information display
Test laboratory operation room
1 intranet per five square feet, using ground plug
LIS computer connection
Test sample receiving room
4 intranets
Collection and verification of samples
Outpatient report distribution
4 intranets
Report distribution
Ultrasound room
2 intranets per machine room
Ultrasound reports, one for each
Ultrasound service desk
4 intranets
Queuing and network printer
Pathology report room
1 intranet per station
Pathology reading report
Parking lot
2 intranets at each entrance/exit
Parking management and image transmission
Outpatient pharmacy
2 intranets per 1.2 meter counter
Pharmacy software. one for each use
Large conference room
The podium inside and outside the network of each of the 4
Link to the internal and external network demonstration
Small and large conference room ceiling
Inside and outside the network of each of the 1
For internal and external network of the wireless link
Key departments access control
Inside the network of the 1
For access control
.Three, the hospital's network architecture
The overall network architecture using two core switch redundancy design, convergence switch to the core switch dual-link uplink, the core switch failure does not affect business operations. The access layer is divided into critical business area, non-critical business area, server area and radiology area according to the nature of the business, see Figure 1 for details.
(a) Critical business area: mainly outpatient and medical departments, the nature of the business determines that the computer network will immediately affect the normal operation of the business once the interruption, the peak of the business stops for five minutes will lead to a large number of patients stranded, resulting in adverse effects. Therefore, the regional access layer switch using dual-link uplink to the convergence layer switch, convergence layer switch using redundant design, any link, core switch, convergence layer switch, uplink module failure will not cause business interruption.
(2) Non-critical business areas: mainly hospital inpatient wards and functional departments, the nature of its business determines that computer network interruption within an hour to repair the business impact is relatively small. Therefore, the access layer switch in this area uses a single link upstream to the convergence layer switch, such as link interruption or upstream module failure will lead to business interruption. Because of the spare link and spare uplink module, the repair time can be controlled within one hour.
(3) Server area: its ports are used to connect to the server in the host room. If the switch fails or the link fails, it will affect the normal operation of all information systems in the hospital, which will have the greatest impact on the hospital's business. Therefore, the access layer switches in this area are stacked and then connected to the core switch using dual-link 10Gbps, so that any failure of the main switch or link interruption will not affect the business, and if any of the access layer switches fails, it can also be used to switch the network connecting servers from the faulty switch to the non-faulty switch within a short period of time.
(4) Radiology area: Because the PACS system of the radiology department has a large flow of information transmission, the access layer switch adopts two 10 Gigabit lines that are not directly connected to the core switch through the convergence layer switch, and the Gigabit transmission bandwidth reaches to the desktop to guarantee the speed of image transmission. Any core switch failure or link interruption will not affect the normal business of the radiology department.
Figure 1 network topology diagram of the hospital
Fourth, experience
(a) new hospitals in the design phase, the hospital information systems management department that is required to intervene in advance, for the weak design company to provide information point coverage program suitable for the future needs of the hospital. Hospital functional zoning of professionalism, complexity determines only the hospital's own computer professionals and technicians may provide coverage needs, but also only in the weak power design company detailed understanding of the hospital's functions and needs on the basis of the consideration of the hospital's future redundancy may be designed to meet the requirements of the hospital's use of the information network, to prevent the omission of the installation of the information point to prevent the impact of the room's functional use. This hospital in the construction process of certain information points are not taken into account in the design, in the construction process to be remedied in a timely manner, but also brings difficulties to the construction, especially the ceiling sealing, increase the information points to the construction of exceptionally difficult. Therefore, in the early stages of the design of weak power design companies and hospital information management department to communicate in detail and by the hospital information management department to provide sub-regional sub-functional detailed coverage of the program is the new hospital information network construction of the early focus of the work.
Now a lot of medical equipment has a network interface can be transmitted through the TCP / IP protocol information, so the hospital information system coverage in addition to the need to consider computer applications, should also be considered, such as monitors, respiratory, anesthesia, radiological equipment and other medical equipment through the hospital network to achieve the monitoring and diagnostic information **** enjoy. Intelligent building deployed a lot of intelligent equipment, such as access control, building control, parking lot, video surveillance system, as well as computer room UPS, precision air conditioning, etc., all need to communicate through the information network, so the information point of the coverage should also be considered comprehensively the network access of the above equipment. This hospital in the construction process did not consider the emergency ICU, cardiology ICU, neurology ICU monitor network access, in the procurement of equipment in place monitor manufacturers to put in place the relevant issues after efforts to remedy the solution.
The weak electricity design company in the clear information point coverage program, the hospital construction department should provide room furniture distribution map in a timely manner to facilitate the weak electricity design company according to the furniture distribution map to determine the location of the information point sockets, to maximize the avoidance of future desks on the left side of the desk and the information point on the right side of the need to go from the aisle line or to re-route for the network line to install a wire slot situation occurs.
(b) With the outpatient and inpatient physician workstations, electronic medical records, medical image archiving and transmission systems and other information systems, hospital-wide applications, the dependence on the computer system is becoming increasingly strong, the computer system failure will lead to a hospital business stops, the patient can not be a normal clinic. Therefore, it is very important to establish a highly reliable and stable hospital computer network. In the process of network design, the hospital carries out redundant design of switching equipment and links for key business areas such as outpatient clinics and medical technology, so as to minimize the chances of business downtime due to network failure. However, for non-critical business areas, the access layer uses a single link and adopts the method of replacing spare parts as soon as possible in case of failure to minimize equipment investment. This hospital this core and convergence layer redundant design, access layer sub-service critical and non-critical network construction program to protect the effectiveness of the investment and the network failure caused by the possibility of paralysis of a large area of information systems to a minimum.
Network equipment for redundancy design, but can really achieve the design requirements to play a redundant role in the event of failure does not affect the normal operation of the business? This requires the development of a detailed exercise program based on the design plan to simulate the core switch, convergence layer switch failure or redundant link interruptions, whether or not to really play a redundant role. After two months of normal operation of the equipment, the hospital formulated a detailed drill program to carry out a practical drill in a normal business environment, and tested whether it would have an impact on the business if the redundantly designed core switches and convergence layer switches were forced to be shut down one after another according to the program and the redundant links were unplugged. The exercise proved the feasibility of the design, and the exercise program and test documents provided practical experience for responding gracefully to real failure situations.