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Midterm Presentation Biomedical Engineering Design March 11, 2010

Andrea Castañeda, Daniel Miranda, Jennifer Wang, Kevin Yeroushalmi, Joseph Youssef Course Advisors: Gordana Vunjak-Novakovic, Keith Yeager, Aaron Kyle, Sarindr Bhumiratana, Matthew Bouchard Project Advisor: Professor Clark Hung

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Midterm Presentation Biomedical Engineering Design March 11, 2010

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  1. Andrea Castañeda, Daniel Miranda, Jennifer Wang, Kevin Yeroushalmi, Joseph Youssef Course Advisors: Gordana Vunjak-Novakovic, Keith Yeager, Aaron Kyle, Sarindr Bhumiratana, Matthew Bouchard Project Advisor: Professor Clark Hung Consultants: Professor Gerard Ateshian, Professor David Vallancourt, Yukkee Cheung Midterm PresentationBiomedical Engineering DesignMarch 11, 2010

  2. Overview • Background • Current status of design • Tremor detection system • Dampening system • Demonstration of functionality • Testing data • Next steps

  3. Background • 5.5 million Americans suffer from intention tremors, which affect their ability to perform daily activities • Our designtargets the area of the arm which is most affected by these tremors • Our device counteracts these tremors by counteracting unwanted motion in the arm and wrist

  4. Corporate Considerations • Regulatory Pathways • Relatively unhindered by regulatory committees • No FDA or Pre-Market Approval (PMA) • IRB approval • Sales Strategy • Online Retail • 30 Day Money Back Guarantee • Warranty/Servicing • Retail Price: $1000

  5. Preliminary Testing • Transcutaneous Electrical Nerve Stimulator (TENS)-- 60 mA, 4-6 Hz settings simulate intention tremors • 5-7 lbs of dampening force counteract induced tremors at frequencies of 4-6 Hz

  6. Current Prototype Tremor Detection • TENS • Accelerometer • Microcontroller • Defined parameters

  7. Current Prototype

  8. Current Prototype Motion Dampening • Rotary damper • Acrylic moment arms • Wrist brace • Straps

  9. Current Prototype

  10. Data: Tremor Amplitude • Arm forces

  11. Data: Writing Sample Control TENS TENS + Elbow Brace TENS + Wrist Brace TENS + Elbow & Wrist Brace

  12. Prototype Analysis

  13. Timeline

  14. Timeline Dampening Clutch Design Gear Solenoid Rotary damper

  15. Timeline

  16. Contingencies

  17. Summary • Detection system senses tremors • Mechanical system dampens up to ~50% • Integration of detection mechanism will allow for dynamic dampening • Consolidation of parts will yield ergonomic device

  18. Acknowledgments Consultants Gerard Ateshian, PhD David Vallancourt, PhD Yukkee Cheung • Course Advisors • Gordana Vunjak- Novakovic, PhD • Aaron Kyle, PhD • Keith Yeager, MS • Matthew Bouchard • Sarindr Ick Bhumiratana • Project Advisor • Clark Hung, PhD

  19. Questions?

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