Active Ankle/Foot Orthotic - PowerPoint PPT Presentation

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Active Ankle/Foot Orthotic

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  1. Active Ankle/Foot Orthotic Client: Dr. Robert Pryzbelski Advisor: Professor Brenda Ogle Team Members: Jessica Hause - Co-leader Erin Main - Co-leader Joshua White - Communicator Anthony Schuler - BWIG Emily Andrews - BSAC

  2. Presentation Outline • Problem Statement • Background • Summary of PDS • Current Orthotics • Design Alternatives • Spring • Joint • Material • Design Matrix • Future Work • References

  3. Problem Statement • Orthotic for patients with neuropathies affecting gait • Actively enhances forefoot propulsion • Increases proprioception and balance • Supports ankle weakness

  4. Background • Neuropathy • Stroke • Charcot-Marie Tooth • Multiple Sclerosis • Plantar & Dorsiflexion • Foot Drop • Normal Gait

  5. Stability and support Aids propulsion Weight-bearing Under $300 Universal vs. custom-fit Light, strong and durable Thermoplastics, biopolymers, nano-fibers, neoprene Summary of PDS

  6. Current Orthotics

  7. Spring Design • Thermoplastic • 90° angle • Leaf spring in sole aids propulsion

  8. Joint Design • Thermoplastic • Two pieces connected by joint • Tamarack joint assists plantar and dorsiflexion

  9. Material Design • Memory material • High energy return • Material assists plantar flexion and dorsiflexion

  10. Design Matrix

  11. Future Work • Continue biomechanics research • Perform gait analysis • Finalize design • Build prototype • Perform prototype testing

  12. References • http://www.footankle.com/ankle-foot.htm • http://www.firsttoserve.com/Catalog-Orthotics/Lower_Extremity/Custom_Ankle_Foot_Orthotic_AFO/ • http://www.dafo.com/index.cfm?pageID=2143 • http://leedergroup.com/ • http://www.beckerorthopedic.com/tamarack/t5.jpg • http://www.ottobock.com/cps/rde/xbcr/SID-3F574DD1-5FE72259/ob_com_en/Bedienungsanleitung_28U11_WalkOn.pdf • http://www.bostonpedorthic.com/orthotics.asp • http://www.germes-online.com/direct/dbimage/50066106/Leaf_Spring.jpg • http://www.springhouston.com/ • http://www.doereport.com/enlargeexhibit.php?ID=842 • http://www.germes-online.com/direct/dbimage/50066106/Leaf_Spring.jpg • https://secure.roycemedical.com/images/products/AFOLeafSpring.jpg • http://www.mda.org/publications/fa-cmt.html • http://sprojects.mmi.mcgill.ca/gait/normal/walk.gif

  13. Pros Cost efficient Ankle stability Durable Cons Over-coverage can cause excessive heat Poor propulsion Bulky Restricted range of motion Spring Design(Pros and Cons)

  14. Pros Cost Propulsion Foot clearance Cons Bulky Poor breath ability Inflexible sole Joint Design(Pros and Cons)

  15. Pros Lightweight Flexible Propulsion Foot clearance Durable Cons Poor stability and support Cost Availability of materials Material Design(Pros and Cons)