1 / 19

Group 21 December 7 , 2011 BME 401 Senior Design Mentor: Jack Engsberg, PhD

Flex2Play An ankle strengthening device with virtual reality interface for children with cerebral palsy. Group 21 December 7 , 2011 BME 401 Senior Design Mentor: Jack Engsberg, PhD Liz Phillips (Presenter), Kelly Hill, Amanda Meppelink. Outline. Overview Details of Chosen Design

dieter
Download Presentation

Group 21 December 7 , 2011 BME 401 Senior Design Mentor: Jack Engsberg, PhD

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Flex2PlayAn ankle strengthening device with virtualreality interface for children with cerebral palsy • Group 21 December 7, 2011 • BME 401 Senior Design • Mentor: Jack Engsberg, PhD • Liz Phillips (Presenter), Kelly Hill, Amanda Meppelink

  2. Outline • Overview • Details of Chosen Design • Materials and Manufacturing • Conclusion

  3. Overview ○ Details of Chosen Design ○ Materials & Manufacturing ○ Conclusion The Need • A strength training device that • is safe for in-home use • requires minimal setup or user training • is affordable • is portable • motivates patient participation

  4. Overview ○ Details of Chosen Design ○ Materials & Manufacturing ○ Conclusion The Scope To design an at-home ankle strengthening device – Flex2Play – that motivates participation by interfacing therapy with a WiiMote which controls online video games

  5. Overview ○ Details of Chosen Design ○ Materials & Manufacturing ○ Conclusion 20° Dorsiflexion 0° Neutral –50° Plantarflexion Dorsiflexion τ=F*d*sin(θ) F=35Nm/(0.28m*sin(90)) F=125N Plantarflexion τ=F*d*sin(θ) F=101Nm/(0.28m*sin(90)) F=361N Design Specifications • Full range of motion • 30° from neutral in DF • -50° from neutral in PF • Progressive Resistance • 35 Nm DF torque • 101 Nm PF torque • Resistance in at least 15% increments • Affordable – $200 target • Portable – 30lbs 8 ft3 • Virtual Reality Interface • 2010 BME401 Group “Wii Controlled Gaming for Therapy”

  6. Overview ○ Details of Chosen Design ○ Materials & Manufacturing ○ Conclusion Chosen Design: Elastic Bands Four Main Components: • Footplate • Base • Hinge Joint • Elastic Bands

  7. Overview ○ Details of Chosen Design ○ Materials & Manufacturing ○ Conclusion Footplate Exploded Isometric View

  8. Overview ○ Details of Chosen Design ○ Materials & Manufacturing ○ Conclusion WiiMote Controller Connection Side View Isometric View

  9. Overview ○ Details of Chosen Design ○ Materials & Manufacturing ○ Conclusion Base Isometric View

  10. Overview ○ Details of Chosen Design ○ Materials & Manufacturing ○ Conclusion

  11. Overview ○ Details of Chosen Design ○ Materials & Manufacturing ○ Conclusion Hinge Joint Exploded Front View Isometric View

  12. Overview ○ Details of Chosen Design ○ Materials & Manufacturing ○ Conclusion Elastic Band Connections

  13. Overview ○ Details of Chosen Design ○ Materials & Manufacturing ○ Conclusion Elastic Band Connection Calculations

  14. Overview ○ Details of Chosen Design ○ Materials & Manufacturing ○ Conclusion Manufacturing Estimated Flex2Play market size • 114,000 children in US age 5-18 with spastic cerebral palsy Commercial Production • Expected 1,000 units sold in the first year • Expected 4,000 units sold in next 5 years Near Future • One Flex2Play prototype for device evaluation • 10 devices for evaluation in small sample

  15. Overview ○ Details of Chosen Design ○ Materials & Manufacturing ○ Conclusion Materials

  16. Overview ○ Details of Chosen Design ○ Materials & Manufacturing ○ Conclusion Conclusions • Specification Fulfillment • Affordable – $189 mass production • Portable – 8.82 lbs and 2 ft3 • Safety Considerations • Future directions • Intellectual Property • Pilot Study with 10 devices • Reflections • What we learned • What we would do differently

  17. Works Cited • Aisen, ML, et al. "Cerebral Palsy: Clinical Care and Neurological Rehabilitation." Lancet Neurology 10.9 (2011): 844-52. • Boley, B. L. (1997). Overview of Motor Types Tutorial. Retrieved October 23, 2011, from http://www.oddparts.com/acsi/motortut.htm • Compression Springs. 23 October 2011. <http://www.leespring.com/int_learn_compression.asp>. • DyneticSystems. (n.d.). Brushless vs Brushed. Retrieved October 23, 2011, from Dynetic Systems: http://www.dynetic.com/brushless%20vs%20brushed.htm • Pinneger, Gavin J and Andrew G. Cresswell. "Residual force enhancement after lengthening is present during submaximal plantar flexion and dorsiflexion actions in humans." Journal of Applied Physiology (2006): 18-25. • Simple Machine Elements. 23 October 2011. <http://cnx.org/content/m13594/latest/>. • The Hygenic Corporation. (2006). Resistance Band & Tubing Instruction Manual. Akron, OH, USA. • Torsion Springs. 23 October 2011. <http://www.leespring.com/int_learn_torsion.asp>.

  18. Flex2PlayAn ankle strengthening device with virtualreality interface for children with cerebral palsy October 26, 2011 • BME 401 Senior Design • Mentor: Jack Engsberg, PhD • Amanda Meppelink(Presenter), Kelly Hill, Liz Phillips

  19. Overview ○ Details of Chosen Design ○ Materials & Manufacturing ○ Safety○ Conclusion Elastic Bands

More Related