Upper extremity joint stresses during walkerassisted ambulation in post-surgical patients

Combining distance and force measurements to monitor the usage of walker assistive devices

“…As it is clearly visible in the figure the intensity of the forces are higher on the left pair of legs of the walker (F LEG1 and F LEG3 ), being the force on the rear leg (F LEG1 ) a little bit higher than the force on front leg (F LEG3 ). These results were expected since the compression forces are greater in the opposite side of the affected foot [26]. Fig.…”

Monitoring Walker Assistive Devices: A Novel Approach Based on Load Cells and Optical Distance Measurements

“… Gait phase 2 is a waiting state that ends when the user starts moving the injured foot (making COF x cross LEFT_TH). During gait phase 3 the user transfers part of his weight to the left to compensate the lack of support on the injured foot [ 31 ]. While the injured foot moves forward, the distance returns to the base value (around 30 cm) and COF x returns to the origin, thus making the machine enter in stage 4.…”

Weight Distribution Monitoring System for Patients With Parkinson’s Disease

“…In order to be effective, the sensor had to meet certain load requirements. Based on a study done by Mcquade et al [6], the required range of the desired sensor was between 0 to 300 N (30% of the person's body weight) with a +/-10% accuracy.…”