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dorsiflexion-assisting ankle brace

Problem Statement. WhatThe design of a ankle brace that assists in dorsiflexion, designed specifically for an athlete whose desired range of ankle motion is greater then a patient with a goal of only walking.WhenWhoDesign is specifically for Jason Williams, and will be tailored for him individually.

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dorsiflexion-assisting ankle brace

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    1. Dorsiflexion-Assisting Ankle Brace Andrea Albergo Thomas Burney Lauren Gallagher Alice Hammer Sheila Powenski Ben Yaffe

    2. Problem Statement What The design of a ankle brace that assists in dorsiflexion, designed specifically for an athlete whose desired range of ankle motion is greater then a patient with a goal of only walking. When Who Design is specifically for Jason Williams, and will be tailored for him individually

    3. QFD

    4. Product Design Specification Product Title: Dorsiflexion-Assisting Ankle Brace Mission Statement: We will design a ankle brace for Jason Williams that will help him run and train on the basketball court, through an assisted dorsiflexion and cushioned heel strike. Customer Needs: Brace must resist the natural tendency of the toe to slap the floor after a heel strike. Full range of ankle motion Lightweight ~ 2 lbs. or less Comfort

    5. Product Design Specification (cont.) Design Requirements: Performance Durable – cycle limit > 10^6 Non-Limiting – must allow full plantar flexion Quick response – must pull foot back before next step Safety No protruding parts that could easily get caught on other players Comfort Weight – as low as possible Operating Environment Room temperature, 60-80 degrees Fahrenheit Repetitive, highly varying stress Service Life should last >15 games/practices without needing replacement parts

    6. Product Design Specification (cont.) Competition: No existing products that enable athletic performance in this type of brace. Intended Market: Product designed specifically for Jason Williams, if successful the brace could possibly be a model for more versatile braces for non-athletic patients. Cost Prediction: $150 - $250, plus occasional part replacement costs

    7. Updated Gantt Chart

    8. Information Gathered The Gait Cycle Eight stages progressing through a single stride Stance Phase: 60% gait Initial Contact to Pre-Swing Hamstrings and dorsiflexors in ankle remain active Quadriceps and gluteal muscles work to maintain stability Swing Phase: 40% gait Initial swing to terminal swing Ankle dorsiflexion occurs with the contraction of anterior tibialis muscle Running Progression of Gait Cycle: Two periods of double float are substituted for the two periods of double support Stance time becomes less then swing time ***Gait cycle to be studied to better understand forces and muscle contractions that are occurring during the walking or running cycle. ***Gait cycle to be studied to better understand forces and muscle contractions that are occurring during the walking or running cycle.

    9. Information Gathered Specific Injury of Patient: Peroneal Mononeuropathy – local damage to a single nerve, commonly the peroneal nerve (not disease or systemic condition) Steppage Gait – walking with a foot drop where toes hang down and foot slaps on heel strike Can be caused by peroneal nerve trauma Causes injured person to lift foot excessively high to avoid dragging toes Causes of Peroneal Neuropathy Knee injury or trauma Injury during knee surgery

    10. Concept Generation – Idea #1 Pro’s Less bulky Less likely to hinder plantar flexion May provide more power for jump Con’s Not best damping solution Springs may fatigue May not work well for low or changing speeds

    11. Concept Generation – Idea #2 Pro’s Most likely to accomplish damping effectively Fewer moving parts for wear and tear Con’s More bulk then other two Needs lubrication May hinder plantar flexion

    12. Concept Generation – Idea #3 Pro’s No unnecessary force to overcome Fewer moving parts Con’s Very intricate design Need Electrical Engineering help Need data on pressure, etc.

    13. Product ArchitectureSchematic Diagram

    14. Product ArchitectureClustering

    15. Product ArchitectureGeometric Layout

    17. Kinematics Analysis Running motion Angular rotation of foot about ankle, Relative motion of toes with respect to lower leg Relative motion of ankle with respect to knee

    18. References Gait Cycle - http://www.orthoteers.co.uk/Nrujp~ij33lm/Orthgait.htm#PHASES Walking/Gait Abnormalities – http://health/allrefer.com/health/walking-gait-abnormalities-info.html Ankle & Foot – Biomechanics – http://www.orthoteers.co.uk/Nrujp~ij33lm/Orthfootmech.htm

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