Method for in-shoe shear stress measurement |
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| Institution: | 1. College of Engineering, Design and Physical Sciences, Brunel University, UK;2. College of Health & Life Sciences, Brunel University, UK;3. University of Social Welfare & Rehabilitation Sciences, Iran;1. MVZ-Zentrum für Histologie, Zytologie und Molekulare Diagnostik, Trier, Germany;2. Danube Private University, Krems-Stein, Austria;3. Baden-Baden Klinik, Baden-Baden, Germany;4. Leipzig, Germany;5. Hospital for Special Surgery/HSS, New York City, NY, USA;6. Paracelsus-Kliniken Deutschland Gmbh, Osnabrück, Germany;7. Pathologisch-bakteriologisches Institut, Otto Wagner Spital, Wien, Austria;8. Labor für Biomechanik und Implantat-Forschung, Klinik für Orthopädie und Unfallchirurgie, Universitätsklinikum Heidelberg, Germany;9. Helios Endo-Klinik, Hamburg, Germany;1. Global Healthy Living Foundation, 515 North Midland Avenue, Upper Nyack, NY 10960, USA;2. Media Cause, 147 Natoma Street, San Francisco, CA 94105, USA;3. Division of Clinical Immunology & Rheumatology, University of Alabama at Birmingham, Faculty Office Tower, 510 20th Street South #834, Birmingham, AL 35294, USA;1. Institute of Crystallography FSRC “Crystallography Photonics”, Russian Academy of Sciences, Leninskii pr. 59, Moscow 119333, Russia;2. National University of Science and Technology “MISIS”, Leninsky pr. 4, Moscow 119049, Russia;3. innoXacs, Am Muehlfeld 34, D-01744 Dippoldiswalde, Germany;4. IFW Dresden, SAWLab Saxony, Helmholtzstr. 20, D-01069 Dresden, Germany |
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| Abstract: | A methodology is described for use of a shear transducer, based on a magneto-resistive principle, to measure stresses under the plantar surface of the foot in-shoe during walking. Particular attention is paid to a projected application for study of diabetic plantar ulceration and its management by footwear. The transducer has a disc construction, approximately 4 mm thick by 16 mm diameter, and measures two orthogonal axes of shear simultaneously; this disc is mounted into an inlay that can be inserted into any stock orthopaedic shoe of the type commonly prescribed for diabetic foot problems. The transducer is located in the metatarsal head region of the inlay; exact placement of the transducer is determined by reference to the direct pressure distribution, the common method of palpation shown to be imprecise. Pilot trials on normal subjects are presented to evaluate the method. |
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