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

Claim 9:
10. A method for monitoring walker usage by a subject, the method comprising:
obtaining an indication of a first time period during which the subject is determined to have transferred between first and second locations;
obtaining movement data comprising values of detected movement of an arm of the subject during the first time period;
determining a measure of variance in the values of detected movement of an arm of the subject during the first 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;

determining 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
classifying 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”.