SHADE: a shape-memory-activated device promoting ankle dorsiflexion
| Autor: | Elena Villa, Franco Molteni, M. Rossini, Stefano Besseghini, S. Pirovano, Stefano Viscuso, L. Magoni, Simone Pittaccio |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Shape-memory alloy Prom Structural engineering medicine.anatomical_structure Mechanics of Materials Passive motion medicine Ankle dorsiflexion General Materials Science Shape memory alloy actuators Ankle Actuator Range of motion business Biomedical engineering |
| Zdroj: | International Conference on Shape Memory and Superelastic Technologies SMST 2008, Stresa, 2008 info:cnr-pdr/source/autori:S. Viscuso1, S. Pittaccio1, M. Rossini 2, L. Magoni 2, S. Pirovano2, E. Villa1, S. Besseghini1, F. Molteni2/congresso_nome:International Conference on Shape Memory and Superelastic Technologies SMST 2008/congresso_luogo:Stresa/congresso_data:2008/anno:2008/pagina_da:/pagina_a:/intervallo_pagine Journal of materials engineering and performance 18 (2009): 824–830. info:cnr-pdr/source/autori:S Pittaccio, S Viscuso, M Rossini, L Magoni, S Pirovano, E Villa, S Besseghini, F Molteni/titolo:SHADE: a shape-memory-activated device promoting ankle dorsiflexion/doi:/rivista:Journal of materials engineering and performance (Print)/anno:2009/pagina_da:824/pagina_a:830/intervallo_pagine:824–830/volume:18 |
| Popis: | Acute post-stroke rehabilitation protocols include passive mobilization as a means to prevent contractures. A device (SHADE) that provides repetitive passive motion to a flaccid ankle by using shape memory alloy actuators could be of great help in providing this treatment. A suitable actuator was designed as a cartridge of approximately 150 × 20 × 15 mm, containing 2.5 m of 0.25 mm diameter NiTi wire. This actuator was activated by Joule’s effect employing a 7 s current input at 0.7 A, which provided 10 N through 76 mm displacement. Cooling and reset by natural convection took 30 s. A prototype of SHADE was assembled with two thermoplastic shells hinged together at the ankle and strapped on the shin and foot. Two actuators were fixed on the upper shell while an inextensible thread connected each NiTi wire to the foot shell. The passive ankle motion (passive range of motion, PROM) generated by SHADE was evaluated optoelectronically on three flaccid patients (58 ± 5 years old); acceptability was assessed by a questionnaire presented to further three flaccid patients (44 ± 11.5 years old) who used SHADE for 5 days, 30 min a day. SHADE was well accepted by all patients, produced good PROM, and caused no pain. The results prove that suitable limb mobilization can be produced by SMA actuators. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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