Gait Speed Measurement for Elderly Patients with Risk of Frailty

The ageing of the population poses a threat to both public and private health and social systems. In the last 50 years, life expectancy has increased by an average of 20 years, and by the year 2050, life expectancy will exceed 90 years of age. However, quality of life in the last years of life is not guaranteed due to conditions such as functional decline and frailty, ultimately progressing to disability. Thus, the detection of such a condition in time is of utmost importance. This paper presents an ultrasonic sensor-based gait speed measurement device controlled via a mobile interface, which permits patients to self-assess physical performance. The system was developed and validated in an iterative process involving a total of 28 subjects (21 in the first round and 7 in the second one). After first evaluation at Hospital Universitario de Getafe, some technical problems arose whereas usability testing was well evaluated. The second version addressing the identified issues was technically validated at university premises with good and promising results. Future work envisages deployment of the system developed at subjects’ homes to be remotely and unobtrusively monitored.

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