First, the general situation of our hospital construction
In 2004, a third-class first-class hospital in our department began to build a new hospital and moved from the original urban center to the newly planned urban center. The new hospital covers an area of 228 mu, with a building area of192,000 square meters and designed beds of10.5 million. At the end of 2007, it was put into use as a whole. The new hospital has designed more than 10000 network information points, involving three buildings in the hospital. The network wiring design adopts six types of lines integrating computer network information points and telephone communication, and the internal network of the hospital is physically isolated from the external network (connected to the Internet). The three buildings are designed with 70 weak current rooms for installing access layer switches. The main computer room and each weak current computer room are connected by at least three four-core indoor optical fibers, and the routing distance from each weak current computer room to the network information point does not exceed 100 meters. Multi-mode outdoor optical fiber is used for buildings within 500 meters, and single-mode outdoor optical fiber is used for connections above 500 meters.
Second, the coverage of information points in different functional areas.
The diversity and complexity of hospital functional divisions determine that the coverage of hospital network information is different from other office buildings. According to the current application demand of the hospital and considering the growth of computer application in the future, the design demand of information point coverage in different functional areas is finally formed. In the process of weak current engineering construction, the user department puts forward further modification requirements for information point coverage in combination with the actual environment. The coverage of information points should not only consider the future application of clinical information system, but also consider the network access of medical equipment and intelligent equipment. Based on the whole process, the new hospital was officially opened.
See table 1 for the coverage of network information points in main functional areas.
Table 1 Coverage of network information points in main functional areas
Classification by function
Number of information points
use
Resident office
Intranet 16
Doctor workstation, electronic medical record, etc.
Department of in-patient nurses
6 intranets
Nurse workstation, electronic medical record, etc.
Ward corridor ceiling
1 one intranet every 20m.
Ward wireless coverage
Office of the resident director
1 Internal and external networks respectively.
Application of hospital information system and its connection with external network
Head nurse's office
Intranet 1
Nurse workstation, electronic medical record, etc.
Attending doctor's office
Intranet 1
Doctor workstation, electronic medical record, etc.
Demonstration classroom
6 intranets
Students' study and work
General ward
External network 1
Internet connection, standby
Vip ward
External network 1
Connect to the internet
Intensive care unit
Each bed has three internal networks, two of which are located on the suspenders, and 1 is located on the wall.
Monitoring equipment connection
Hospitalization hall
Intranet 1
touch screen
Outpatient clinic
2 intranets
Outpatient doctor workstation, 1 is 1.
Above the outpatient door frame
Intranet 1
Queuing information display
Pre-inspection of consulting area
4 intranets
Diversion and queuing management
Outpatient registration and fees
Every 1.2m, there are 2 intranets on the counter.
Charge 1, associated bank POS machine 1.
Outpatient hall
8 intranets
Self-registration and checklist printing, touch screen
operating room
There are six internal networks, two of which are located in the boom.
Anesthesia monitoring equipment, computer and medical imaging
Resuscitation room
Each bed has 1 intranet, which is located in the equipment belt.
Anesthesia monitoring equipment
Radiological report room
24 intranets
Computer reading report
Radiological room control room
4 intranets
Radiological equipment and computer connection
Above the radiation chamber door frame
Intranet 1
Queuing information display
Laboratory operation room
There are 1 intranet every five square meters, and plug in the power supply.
LIS computer connection
Inspection sample collection room
4 intranets
Receiving and inspecting samples
Outpatient report distribution
4 intranets
Report distribution
b ultrasonic room
Each computer room has 2 intranets.
B-ultrasound report, one for standby and one for use.
B-ultrasound service desk
4 intranets
Queues and network printers
Pathology report room
Per station 1 intranet
Pathological reading report
stop
There are 2 intranets at the entrance and exit.
Parking management and image transmission
Outpatient pharmacy
Every 1.2m, there are 2 intranets on the counter.
Pharmacy software, one for use.
Large meeting room
There are four inside and outside the rostrum.
Demonstration of connecting internal and external networks
Ceiling of large and small conference rooms
1 Internal and external networks respectively.
Wireless connection between internal and external networks
Access control of key departments
Intranet 1
Used for access control
Third, the network architecture of our hospital
The overall network architecture adopts the redundant design of two core switches, and the convergence switch is uplink to the core switch with double links. The failure of the core switch does not affect the business operation. The access layer is divided into critical service area, non-critical service area, server area and radiation area according to the nature of the service. See figure 1 for details.
(1) Key business areas: mainly outpatient departments and medical technology departments, whose business nature determines that once the computer network is interrupted, it will immediately affect the normal business operation, and a five-minute pause in the business peak will lead to a large number of patients staying, causing adverse effects. Therefore, the access layer switch in this area adopts double-link uplink to convergence layer switch, and the convergence layer switch adopts redundant design, so that the failure of any link, core switch, convergence layer switch and uplink module will not cause business interruption.
(2) Non-critical business areas: mainly hospital wards and functional departments, whose business nature determines that repairing computer networks within 1 hour after interruption has little impact on business. Therefore, the access layer switch in this area adopts single-link uplink to convergence layer switch. If the link is broken or the uplink module fails, the service will be interrupted. Because of the backup link and backup uplink module, the repair time can be controlled within 1 hour.
(3) Server area: its port is used to connect the servers in the host room. If the switch failure or link failure will affect the normal operation of all hospital information systems, it will have the greatest impact on hospital business. Therefore, the access layer switches in this area are stacked first, and then connected with the core switches through 10 Gigabit dual links. The failure or link interruption of any main switch will not affect the service. If any access layer switch fails, the network connected to the server can be switched from the failed switch to the non-failed switch in a short time.
(4) Radiology area: Due to the large information transmission flow of PACS system in radiology department, the access layer switch is directly connected with the core switch with two 10 Gigabit lines, without going through the convergence layer switch, and the Gigabit transmission bandwidth reaches the desktop, ensuring the speed of image transmission. The failure or link interruption of any core switch will not affect the normal business of radiology department.
Figure 1 Network Topology Diagram of Our Hospital
Fourth, experience
(1) In the design stage of a new hospital, the hospital information system management department needs to intervene in advance to provide the weak current design company with an information point coverage scheme suitable for the future needs of the hospital. The professionalism and complexity of hospital functional zoning determine that only computer professionals in the hospital can provide coverage requirements. Only by knowing the functions and requirements of the hospital in detail and taking into account the future redundancy of the hospital can weak current design companies design an information network that meets the requirements of hospital use and avoid the lack of information points affecting the use of room functions. Some information points were not considered in the design of our hospital during the construction process, and were remedied in time during the construction process, but it also brought difficulties to the construction, especially in the case of ceiling capping, which made it extremely difficult to increase the construction of information points. Therefore, in the early stage of design, it is the key work for the weak current design company to communicate with the hospital information management department in detail, and the hospital information management department to provide detailed coverage schemes by region and function.
At present, many medical devices have network interfaces to transmit information through TCP/IP protocol. Therefore, when covering the hospital information system, in addition to computer applications, medical equipment such as monitors, ventilators, anesthesia machines and radiation equipment should also be considered, so that monitoring and diagnosis information can be shared through the hospital network. Many intelligent devices deployed in intelligent buildings, such as access control, building control, parking lot, video monitoring system, computer room UPS, precision air conditioning, etc., all need to communicate through information network, so the network access of the above devices should also be considered comprehensively when covering information points. During the construction of our hospital, the monitor network access in emergency ICU, cardiology ICU and neurology ICU was not considered, and it was solved only after the equipment procurement and the monitor manufacturer raised related problems.
After the weak current design company defines the information point coverage scheme, the hospital construction department should provide the room furniture distribution map in time, which is convenient for the weak current design company to determine the position of the information point socket according to the furniture distribution map, so as to avoid the situation that the desk is on the left and the information point is on the right, and it is necessary to take the line from the aisle or reinstall the trunking of the network cable.
(2) With the application of outpatient and inpatient workstations, electronic medical records, medical image archiving and transmission systems and other information systems in the whole hospital, the dependence on computer systems is getting stronger and stronger, and the failure of computer systems will lead to the suspension of hospital business and the inability of patients to see a doctor normally. Therefore, it is very important to establish a highly reliable and stable hospital computer network. In the process of network design, our hospital designed switching equipment and link redundancy in key business areas such as outpatient service and medical technology to minimize the chance of business interruption caused by network failure. However, for non-critical business areas, the access layer adopts a single link and adopts the method of replacing spare parts as soon as possible in case of failure to minimize equipment investment. This redundant design of core and convergence layer, as well as the network construction scheme that the access layer divides services into critical and non-critical ones, ensure the effectiveness of investment, and minimize the possibility of large-area information system paralysis caused by network failure.
The network equipment is designed redundantly, but it can really meet the design requirements and play a redundant role. Will the failure not affect the normal operation of the business? Therefore, it is necessary to make a detailed exercise plan according to the design scheme to simulate whether the core layer switch and convergence layer switch will really play a redundant role in the event of failure or redundant link interruption. After two months of normal operation of the equipment, our hospital has made a detailed drill plan, and conducted practical drills in a normal business environment to test whether it will affect the business if the power supply of redundant core switches and convergence layer switches is forcibly turned off and redundant links are unplugged as planned. The drill proves the feasibility of the design, and the drill scheme and test documents provide practical experience for calmly handling real faults.