Patent ID: 11911148
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. A system for monitoring walker usage by a subject, the system comprising:
an input interface adapted to obtain an indication of a first time period during which the subject is determined to have transferred between a first location and a second location;
a data acquisition unit adapted to obtain movement data comprising values of detected movement of an arm of the subject over the first time period;
a data analysis unit adapted to:
obtain a frequency domain representation of the values of detected movement of an arm of the user during the first time period and the second time period, and
determine a measure of variance in the values of detected movement of an arm of the user during the first time period and the second time period based on at least one of:
a mean or median frequency of the frequency domain representation of the values of detected movement,
a comparison of low and high frequency bands of the frequency domain representation of the values of detected movement, and
a modal frequency of the frequency domain representation of the values of detected movement; and

a monitor unit adapted to determine if the subject used a walker during the first time period while transferring from the first location to the second location based on the determined measure of variance over the first time period and to classify at least one time subperiod of the first period as “walking with walker” and at least one other time subperiod of the first time period as “walking without walker”.