In the busy and crowded environment of health care, accurate location information of mobile medical devices and personnel (e.g. patients or physicians) is often a major challenge. In this paper, we present a real-time asset tracking system deployed within a hospital clinic setting, which tracked a set of mobile assets using small WiFi tags. The deployed system utilized radio signals received from wireless access points to estimate location of tagged assets. The system performed with resolution of within 1.5 meters, which is an acceptable range in such an environment. We developed a web-based graphical interface and a data management system which was capable of tracking and reporting status of an asset and providing an alert signal when it moved out of a designated area. Additionally, detailed logs of asset tracking information were available for archival purposes. This deployment demonstrates the feasibility of a Wi-Fi based positioning system in dynamic medical environments.
A report by the Institute of Medicine of the National Academy ofSciences estimates that as many as 98,000 people die in U.S. hospitals each year because of medical errors. In this project, we propose an innovative IT-based approach to prevent errors in various medical processes by utilizing advances in Radio Frequency Identification (RFID) and wireless communications. The goal ofthe study is to perform an in-depth study of existing RFID technologies for patient care in medical facilities. In the paper; a new system architecture that integrates various wireless technologies such as RFID and Wi-Fi was proposed. In the pilot study, we primarily focused on the limitations and shortcomings of passive RFID technologies in medical settings. Our experimental results show the reliability challenge in the current passive EPC Gen 2 RFID systems for use in a dynamic medical environment.
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