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IEICE Transactions on Information and Systems 2006 E89-D(7):2294-2300; doi:10.1093/ietisy/e89-d.7.2294
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Copyright © 2006 The Institute of Electronics, Information and Communication Engineers

Regular Section -- Papers -- Biological Engineering

Design and Fabrication of the Wireless Systems for Pressure Monitoring Systems in the Gastro-Intestinal Track

YeonKwan MOON1, JyungHyun LEE1, HeeJoon PARK1, JuGab LEE1, JaeJong RYU1, ChulHo WON2, JungHee LEE1, JinHo CHO1,3 and HyunChul CHOI1

1 The authors are with the School of Electrical Engineering and Computer Science, Kyungpook National University, Daegu, 702–701 Korea. E-mail: hcchoi{at}ee.knu.ac.kr, 2 The author is with Kyungil University, Korea., 3 The author is with the Department of Biomedical Engineering, School of Medicine, Kyungpook National University, Daegu, 700–721 Korea.

Diseases in the gastro-intestinal track are becoming more prevalent. In order to diagnose a patient, the various signals of the digestive organ, such as temperature, pH, and pressure, can offer helpful information. The variation of a pressure signal of the gastro-intestinal track can offer information about digestive troubles or provide clues about diseases. This paper presents a wireless system for the pressure monitoring system, which includes a swallow-type pressure capsule and the external receiving system. A transmitter, a transmitting antenna (Helix), a receiver, and a receiving antenna (Loop) were designed and fabricated in consideration of the MPE, power consumption, system size, signal to noise ratio and modulation method. The wireless system designed and implemented for the pressure monitoring system was verified by in-vivo experiments. As a result, we found each organ has its own characteristic pressure fluctuation.

Key Words: pressure monitoring systems, wireless system, transmitter, helix, in-vivo experiment

Manuscript received July 19, 2005. Manuscript revised January 26, 2006.


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