NDLI: Detecting destabilizing wheelchair conditions for maintaining seated posture

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Detecting destabilizing wheelchair conditions for maintaining seated posture

Content Provider	Scilit
Author	Crawford, Anna Armstrong, Kiley Loparo, Kenneth Audu, Musa Triolo, Ronald
Copyright Year	2017
Description	Journal: Disability and Rehabilitation: Assistive Technology The purpose of this study was to detect and classify potentially destabilizing conditions encountered by manual wheelchair users with spinal cord injuries (SCI) to dynamically increase stability and prevent falls. A volunteer with motor complete T11 paraplegia repeatedly propelled his manual wheelchair over level ground and simulated destabilizing conditions including sudden stops, bumps and rough terrain. Wireless inertial measurement units attached to the wheelchair frame and his sternum recorded associated accelerations and angular velocities. Algorithms based on mean, standard deviation and minimum Mahalanobis distance between conditions were constructed and applied to the data off-line to discriminate between events. Classification accuracy was computed to assess effects of sensor position and potential for automatically selecting a dynamic intervention to best stabilize the wheelchair user. The decision algorithm based on acceleration signals successfully differentiated destabilizing conditions and level over-ground propulsion with classification accuracies of 95.8, 58.3 and 91.7% for the chest, wheelchair and both sensors, respectively. Mahalanobis distance classification based on trunk accelerations is a feasible method for detecting destabilizing events encountered by wheelchair users and may serve as an effective trigger for protective interventions. Incorporating data from wheelchair-mounted sensors decreases the false negative rate.
Related Links	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5623614/pdf
Ending Page	185
Page Count	8
Starting Page	178
ISSN	17483107
e-ISSN	17483115
DOI	10.1080/17483107.2017.1300347
Journal	Disability and Rehabilitation: Assistive Technology
Issue Number	2
Volume Number	13
Language	English
Publisher	Informa UK Limited
Publisher Date	2018-02-17
Access Restriction	Open
Subject Keyword	Journal: Disability and Rehabilitation: Assistive Technology Manual Wheelchair Propulsion Seated Posture Mahalanobis Distance Event Detection Spinal Cord Injury Seated Stability
Content Type	Text
Subject	Orthopedics and Sports Medicine Rehabilitation Physical Therapy, Sports Therapy and Rehabilitation Speech and Hearing Biomedical Engineering

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