DeLaTorre Orthotics and Prosthetics, Inc. BioEng 1161 Dept of Bioengineering University of Pittsburgh March 22, 2005 Stump Cone Marissa Ammer Jonisha Pollard Alison Saulsbery Mentor: Bob MaGuire DeLaTorre Orthotics and Prosthetics, Inc.

Background Post-amputation dressings are applied to stump to: Reduce edema (fluid collection) Prevent Thrombo (clotting) and embolic (occlusion of blood vessels) complications Stabilize stump shape Protect the stump Three types of dressings: soft, semi-rigid, rigid Our device is semi-rigid

The Stump Cone Semi-rigid plastic outer layer Can be adjusted to thigh diameter Charcoal pad and foam insert sit in the bottom Protect bottom of stump Absorb fluid Inner liner has been changed Old: a few sizes of replaceable liners New: standard prosthetic socks

Personal Work Achievements: Research into post-amputation prosthetic devices Research into materials used in prosthetic devices SolidWorks model of prototype To Do: Modify SolidWorks Design - material properties Devise a FEA to validate design Help update the SBIR

Milestones Find a Mentor (late January) Fabricate a Prototype (3/2/05) Updated SolidWorks model (end of March) Decide on analysis method (beginning of April) Update documents (continuing) SBIR (mid April)

Possible Problems SolidWorks Model predicting behavior of device Model assumes that the device was milled Reality: plastic was shaped over a model of a stump Analysis in SolidWorks Should several SolidWorks models be used? Use of thermo-plastic so that pressure relief is possible to accommodate edema How do you model edema in SolidWorks?

Acknowledgements Brian – the fabulous tech that made our prototype Drew Buffat, CP of DeLaTorre Orthotics and Prosthetics, Inc. Mark Gartner Department of Bioengineering, University of Pittsburgh

Thanks! Any Questions?