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Denmark's Mega Hospital Works on Mega RFID Deployment
When New University Hospital's construction is completed in 2019, planners expect 350,000 assets and individuals will be tagged and 2,500 fixed readers will be installed.
At DNU, EPC Gen 2 passive UHF RFID tags are being attached to equipment and beds as they are received at the loading dock, and are then moved into the distribution warehouse and down corridors to active hospital spaces. RFID readers are installed at multiple locations to capture read data, and Lyngsoe's Live Logistics software collects that information and assigns each tag ID to the zone in which it was most recently interrogated. When a tagged item moves to another zone, its status is updated in the system. Lyngsoe software then forwards that data to Electronic Product Code Information Services (EPCIS) software, residing on the hospital's server and provided by Systematic. The EPCIS software provides a portal for accessing dashboards that show each item's location and, therefore, its activity—cleaning, for instance. Staff members can access the EPCIS software and view location data, such as where a particular infusion pump or bed is located. In the future, data regarding the locations of employees and patients may be included as well.
During this initial deployment phase, DNU is using EPC Gen 2 passive tags and readers to track equipment, trolleys, beds and other assets related to patient treatment. "This is done to optimize availability and minimize the amount in use," Stilling explains. The next phase, which will be carried out this fall, may include RFID-enabled badges worn by staff members to identify the locations of personnel when needed. "Staff will be located under strict terms of privacy," he says. "The current position of an employee is accessible. No historical data on staff movement is obtained. I expect tracking of patients to be tested in the near future. The first case on our wish list is tracking of Alzheimer's patients."Omni-ID IQ400 EU, Smartrac Frog 3D, GAO RFID 116010 and 116035, Xerafy Cargo Trak, and Alien Technology ALN9640 and RC9003 tags. "Others are being tested," Stilling states. "We are not yet decided on the make we will use for personnel. Several are being tested."
Most of DNU's existing readers are installed in doorways, typically with two antennas to determine a tagged object's direction of movement from one room to another. The system is also able to receive positioning data from Wi-Fi and GPS devices. "This gives a very versatile tracking model," Stilling explains, "but the RFID installation is the backbone of the system, because the cost of tracking an object with passive tags is a lot cheaper than Wi-Fi, GPS and iBeacon, when the infrastructure is established."
One of DNU's early use cases, planned for mid-2017, will be to utilize data related to the RFID tags worn by patients, to alert cleaning staff once a surgery has finished. In addition, Stilling says, RFID will be used to track sterile goods, which are allowed to remain in storage for only a limited number of days. Small-scale testing of this functionality is currently underway. With just-in-time delivery, sterile goods will be placed in buffer areas throughout the hospital. When these products reach their end-of-use date, an alert will be issued and the items will retrieved for re-sterilization. Hospital beds require thorough washing after 14 days of use, and RFID will be used to track that usage. The cleaning staff will be alerted when a thorough cleaning is due, and will replace that bed with a clean on.
A major business case, Stilling says, is to generate an automatic alert when medical supplies arrive at a destination. Letting local employees know that new supplies are available when they are placed in local storage will enable the staff to put those supplies to use as soon as they are needed. However, DNU has not yet decided when it will implement such an application.
In addition, DNU is testing active 433 MHz RFID tags compliant with the ISO 18000-7 standard, as well as active RFID tags compliant with Wi-Fi standards. In the future, Stilling says, all hospital beds may be equipped with an active sensor and status tag (Lyngsoe's model DT40), which will allow the staff to request bed maintenance and cleaning from the bedside.
Mobile devices with built-in Wi-Fi functionality will be tracked in some cases as well. Temperature and other environmental data is already being collected automatically via USB data-loggers, Ethernet devices and occasionally Wi-Fi. Some trolleys will also be tracked via active RFID tags for real-time, location-based status updates. "The investment in RFID is expected to break even after four years of service," Stilling says.
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