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Healthc Inform Res > Volume 15(1); 2009 > Article
Journal of Korean Society of Medical Informatics 2009;15(1):41-48.
DOI: https://doi.org/10.4258/jksmi.2009.15.1.41    Published online March 31, 2009.
A Study on the Patient Location Monitoring System Based on RFID - RSSI
Do Sung Kim1,2, Jungchae Kim3, Seung Ho Kim4, Sun K Yoo1,5,6
1Brain Korea21 Project for Medical Science, Yonsei University, Korea.
2Human Identification Research Center, Yonsei University, Korea.
3Graduate School of Biomedical Engineering, Yonsei University, Korea.
4Department of Emergency Medicine, Yonsei University College of Medicine, Korea.
5Department of Medical Engineering, Yonsei University College of Medicine, Korea.
6Center for Emergency Medical Informatics, Korea.
Correspondence:  Sun K Yoo,
Received: 28 March 2008
Abstract

Objective: The location services has been an important research area in the U-Healthcare. The location services in medical environment can be implemented by Radio Frequency Identification (RFID), and Received Signal Strength Indication (RSSI) which is the location tracking method by RFID. In this study, we was designed the Patient Location Monitoring System based on RFID using RSSI method.

Methods: The RSSI method is a distance measurement method from reference points to object using the Friis's Principle and the Triangulation. The Patient Location Monitoring System was implemented by XML Data transmitted from the Positioning Server to the application. The Patient Location Monitoring System was designed by C# of Visual Studio 2005 and MS-SQL 2005 Express.

Results: The Patient Location Monitoring System had the location-tracking average error of 90.50cm, the standard-deviation of 13.34cm in Open-Space test. And, the designed system had the location-tracking average error of 163.24cm, the standard-deviation of 16.85cm in Closed-Space Test. Also, a patient waiting-list guide performance of the Patient Location Monitoring System had successes of 85~100%.

Conclusion: In this study, the Patient Location Monitoring System, combined with both patient location-tracking function and patient waiting-list guide function, was validated by experiments in medical environment and this system can be applicable to patient management and further applications.

Key Words: Radio Frequency Identification (RFID), Received Signal Strength Indication (RSSI), Location services, Patient Location Monitoring System


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