A system for automatic measurement of circadian activity deviations in telemedicine
Virone, G.; Noury, N.; Demongeot, J.
Biomedical Engineering, IEEE Transactions on
Volume 49, Issue 12, Dec. 2002 Page(s):1463 - 1469
Digital Object Identifier   10.1109/TBME.2002.805452
Summary:A system for the automatic measurement of the circadian activity deviations in telemedicine has been developed within the framework of a "Health Integrated Smart Home Information System" (HIS²). HIS² is an experimental platform for the evaluation and the development of technologies in order to ensure the security and quality of life for patients who need home based medical monitoring. Location sensors are placed in each room of the HIS², allowing the monitoring of patient's successive activity phases within the patient's home environment. We proceeded with a sampling in an hourly schedule to detect weak rhythmic variations. Based on numerous measurements, we established a mean value with confidence limits. These also allowed us to define a zone within which the patient's activity is qualified to be "predictable." Alerts are set off if the patient's activity deviates from this zone.

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