Design and Evaluation of Partial Weight-Bearing Sensor and Haptic Feedback System for Lower-Extremity Orthopedic Patients

DeLuke, Levi; Zheng, Ying; Fu, Michael C.; Grauer, Jonathan N.; Fan, Richard E.; Morrell, John B.

doi:10.1109/smc.2013.576

Cited by 1 publication

(3 citation statements)

References 14 publications

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“…Thin wires are exposed to wear and abrasion, and more rugged solutions should be developed. Considering the choice of force sensor, the strain gauge based force sensors have provided reliable readings throughout the testing period, which is in accordance with reports from [13]. The disadvantage of these sensors compared to force resistive or capacitive sensors is that they must be integrated into the sole of the shoe, requiring custom manufacturing methods.…”

Section: Discussionsupporting

confidence: 75%

“…Results from the test showed that the user was able to load within ±3 kg of the target load for ten loading cycles, which is within the reported clinical tolerance of ±4.5 kg [13]. The results are shown in Fig.…”

Section: Force Sensing Verificationsupporting

confidence: 52%

“…This technology could also be used for PWB monitoring, but it has limitations in terms of robustness, and it was reported that bladders were prone to leaking in the current implementation. Another study presented an orthosis using single strain-gauge based load cells for force detection, and a vibrotactile feedback belt load correction [13]. This device showed a weight sensing accuracy of ±2.43 kg in the range 2.3 − 23 kg, which was within the reported clinical tolerance of ±4.5 kg for PWB compliance.…”

Section: Introductionmentioning

confidence: 83%

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Implementation and Evaluation of a Vibrotactile Assisted Monitoring and Correction System for Partial Weight-Bearing in Lower Extremities

Bjelland,

Gulliksen,

Kwiatkowski

et al. 2023

2023 IEEE World Haptics Conference (WHC)

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Accurate partial weight bearing in the foot during rehabilitation from musculoskeletal injuries in lower extremities is important to ensure successful recovery. However, it is difficult for patients to know how much to load, and many are therefore reluctant to load at all. This study presents a novel footwear concept with strain gauge based force sensors and vibrotactile feedback that enables accurate foot loading and partial weight bearing monitoring during rehabilitation from musculoskeletal injuries in the lower extremities. Four force sensors integrated in the foot-sole of a sandal measures ground reaction force, and two eccentric rotating mass motors provide vibrotactile feedback to the user when a predetermined force threshold is reached. Partial weight bearing data from the force sensors are transferred wireless using wifi communication to a remote patient monitoring dashboard, enabling decision support for health personnel. We demonstrate the use of the prototype to reduce overloading in partial weight bearing in a validation experiment (N = 16). Findings showed that the prototype significantly reduced overloading in the right foot for healthy adults (p < 0.05), which indicate that closed-loop force sensing footwear with vibrotactile feedback can be useful in aiding patients with musculoskeletal injuries in the lower extremities during rehabilitation.