Telemonitoring of patients with Parkinson's disease using inertia sensors.

BACKGROUND: Medical treatment in patients suffering from Parkinson's disease is very difficult as dose-finding is mainly based on selective and subjective impressions by the physician. OBJECTIVES: To allow for the objective evaluation of patients' symptoms required for optimal dosefinding, a telemonitoring system tracks the motion of patients in their surroundings. The system focuses on providing interoperability and usability in order to ensure high acceptance. METHODS: Patients wear inertia sensors and perform standardized motor tasks. Data are recorded, processed and then presented to the physician in a 3D animated form. In addition, the same data is rated based on the UPDRS score. Interoperability is realized by developing the system in compliance with the recommendations of the Continua Health Alliance. Detailed requirements analysis and continuous collaboration with respective user groups help to achieve high usability. RESULTS: A sensor platform was developed that is capable of measuring acceleration and angular rate of motions as well as the absolute orientation of the device itself through an included compass sensor. The system architecture was designed and required infrastructure, and essential parts of the communication between the system components were implemented following Continua guidelines. Moreover, preliminary data analysis based on three-dimensional acceleration and angular rate data could be established. CONCLUSION: A prototype system for the telemonitoring of Parkinson's disease patients was successfully developed. The developed sensor platform fully satisfies the needs of monitoring patients of Parkinson's disease and is comparable to other sensor platforms, although these sensor platforms have yet to be tested rigorously against each other. Suitable approaches to provide interoperability and usability were identified and realized and remain to be tested in the field.

[Measurement of the temporary auditory threshold shift (TTS) for evaluation of the degree of noise hazard]. / Zastosowanie pomiaru czasowego przesuniecia progu slyszenia (TTS) do oceny stopnia zagrozenia halasem.

Long-term investigations of noise in coal mines enhanced the need to take measurements at work stations posing high risk of methane explosion. To facilitate evaluation of noise hazard at the workplace in coal mines, attempts have been made to apply TTS measurements. Measurements of TTS taken within 3 to 5 minutes after cessation of noise exposure in industrial conditions made it possible to evaluate equivalent sound level.