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A Smartphone Application for Improving Powered Seat Functions Usage: A Preliminary Test

A Smartphone Application for Improving Powered Seat Functions Usage: A Preliminary Test Yu-Kuang Wu, MS PT, Hsin-Yi Liu, MS PT, Josh Brown, BS, Annmarie Kelleher, MS OTR/L, Hongwu Wang, PhD, Rory A. Cooper, PhD. Introduction. Powered wheelchair users who use powered seat functions

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A Smartphone Application for Improving Powered Seat Functions Usage: A Preliminary Test

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  1. A Smartphone Application for Improving Powered Seat Functions Usage: A Preliminary Test Yu-Kuang Wu, MS PT, Hsin-Yi Liu, MS PT,Josh Brown, BS, Annmarie Kelleher, MS OTR/L, Hongwu Wang, PhD, Rory A. Cooper, PhD

  2. Introduction • Powered wheelchair users who use powered seat functions • Unable to adjust their postures or manage their seating pressure independently because of motor and/ or sensory impairments • The powered seat functions • Provide users with dynamic postural support • Help users perform pressure relief • Provide management of complications • Improve driving safety • A tailored reminder system • Provide reminder to users to adjust powered seat function based on clinical recommendations • Extend training beyond the clinical setting and into real world situation

  3. Introduction • Virtual Seating Coach (VSC) • Install sensors on the wheelchair to monitor powered seat functions usage • Facilitate and instruct users to utilize powered seat functions based on clinical recommendations • Increase subjects' compliance with clinical recommendation • Increase 30% compliance of performing pressure relief • The preliminary findings encourage us to increase the number of individuals who can benefit from this application

  4. Introduction • Challenges of Current VSC • Time consuming for sensors installation. • Need case for every encoder • Require permanent modification to wheelchair • We have to provide our wheelchair to the users in the study. • Develop an easily and quickly installed system for most powered wheelchairs • Accelerometer • Tablet size and location • Interfere with daily activities • A compact display and computer device • Android smartphone

  5. Introduction • The purposes of this study are to • Develop an Android smartphone based virtual seating coach • Test the usability of this Android smartphone based virtual seating coach

  6. Two vectors (y and z axis) to determine the tilt angle The locations of accelerometers were placed Request data Broadcast data

  7. Design Goals • Features • Quick installation • Easy to use • Reposition Reminder (powered seat functions usage & pressure relief reminders) • User performance feedback • Customize the coach application

  8. Quick Installation and Easy to Use • Video Demo of System Installation

  9. powered seat functions Reminders

  10. powered seat functions Reminders - Safety Driving Reminder • Video Demo of Reposition Reminder

  11. Pressure Relief Reminder

  12. Pressure Relief Reminder • Video Demo of Pressure Relief Reminder

  13. User Performance Feedback and Customize the Coach Application

  14. Usability test result (n = 5) 0: Totally Disagree 5: Totally Agree

  15. Usability test result (n = 5)

  16. Conclusion • The improvements in this smartphone VSC include • User-friendly installation: • Using hook and loop fastener • Allow our system to be applied on various types of powered wheelchairs • Decrease the complexity of sensors’ installation. • Small size display • A smartphone application to display information and give reminders • Increase the flexibility for placement • Decrease the impact on wheelchair transfers and daily tasks. • Ongoing usability test • Gather their feedback for application design and information delivery • Improve the hardware and software design

  17. References • Trefler E, Schmeler M. State of the science white paper on seating for postural control. In: Brubaker CE, Brienza, DM, editors. Proceedings of Wheelchair Seating: A State of the Science Conference on Seating Issues for Persons with Disabilities; 2001 Feb 19–20; Rehabilitation Engineering Center on Wheeled Mobility and the School of Health and Rehabilitation Sciences, Orlando, FL. Pittsburgh (PA): University of Pittsburgh; 2001. p. 21–26 Easy to use. • Lange, M., Positioning: it's all in the angles. Advance for Occupational Therapy Practitioners, 2006 . • Dicianno, B.E., et al., RESNA position on the application of tilt, recline, and elevating legrests for wheelchairs. Assist Technol, 2009. 21(1): p. 13-22; quiz 24. • Corfman, T.A., et al., Tips and falls during electric-powered wheelchair driving: effects of seatbelt use, legrests, and driving speed. Arch Phys Med Rehabil, 2003. 84(12): p. 1797-802. • Ding, D., et al., Virtual coach technology for supporting self-care. Phys Med RehabilClin N Am, 2010. 21(1): p. 179-94. • Liu., H.-y., et al., Seating virtual coach: A smart reminder for power seat function usage. Technology and Disability, 2010. 22: p. 53-60. • Liu, H.-y., et al., Case Study: Pilot Test of Virtual Seating Coach Evaluated by Power Seat Function Users., Rehabilitation Engineering and Assistive Technology Society of North America Conference, Baltimore, MD, June 28-July 3, 2012.

  18. Acknowledgement • National Science Foundation Quality of Life Technology Engineering Research Center (Grant EEC-0540865) • Department of Veterans Affairs Center of Excellence for Wheelchairs and Associated Rehabilitation (Grant B3142C) • Department of Veterans Affairs Research and Development Merit Review Award: Power Seating Function Usage among Veterans - Compliance and Coaching (Grant B6591R)

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