Development of ultra-wide range biotelemetry and telemonitoring system

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A telemetry technique and a test-system have been developed to realize continuous vital-sign monitoring for the senior citizens living alone and the patient in home care. The following research has been conducted.1. A ring-type sensor was designed to measure pulse-wave optically without interfering a daily activity of the subject. The telemeter using the ring-type sensor satisfied the practical demands for signal fidelity, transmission range, size, weight and battery life.2. A technique of two-step telemetry was newly devised to meet the antagonizing requirements for low constraint and wide coverage-area at the same time.3. Using a PHS terminal, an ultra-wide area telemonitoring system has been developed to realize the above technique.4. Using the developed system, the practicality and the usefulness of the proposed technique was tested in normal and unfavorable environmental conditions.Through this study, the following results were obtained. A vital-sign can be continuously monitored almost unconsciously. Usually the range of telemonitoring had been confined in a home. With this technique, the range has been expanded to the extent of almost all the domestic areas. A practical technique has been developed to monitor a vital-sign using a wearable common terminal both inside and outside the home. In the home, the cellular phone terminal serves as a cordless phone and no network charge is required. Through the experiments, the feasibility of the proposed technique and the practical usefulness of the developed system were verified.