J Korean Soc Med Inform.  2009 Mar;15(1):41-48.

A Study on the Patient Location Monitoring System Based on RFID - RSSI

• Kim DS
• Kim J
• Kim SH
• Yoo SK

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.

Keyword

Radio Frequency Identification (RFID); Received Signal Strength Indication (RSSI); Location services; Patient Location Monitoring System

MeSH Terms

Humans
Radio Frequency Identification Device*

Figure

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  Figure 1 RFID Hardware System Configuration

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  Figure 2 The Sequence Diagram of Patient Location Monitoring System

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  Figure 3 Patient Location Monitoring System Configuration

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  Figure 4 (a) A Result for User Interface of Patient Monitoring System (b) Waiting-List Display Frame in Patient Waiting-Room

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  Figure 5 Moving Time of Patients in Examination-Room

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