Identifying Spring Coefficient for Assisting Hemiplegic Patient's Heel Rocker Function: A Feasibility Study

Jing Chen Hong, Genki Tanaka, Kazuhiro Yasuda, Hiroki Ohashi, Hiroyasu Iwata

研究成果: Conference contribution

抄録

Most stroke patients with hemiplegia have difficulty on heel rocker function due to weak dorsiflexors at their paralyzed side. The proposed high-dorsiflexion assistive robotic technology (RT) supports ankle dorsiflexion during gait rehabilitation. Aside from the McKibben-type artificial muscle's contraction to assist swing phase dorsiflexion, a tension spring is aligned in series to support heel rocker function upon heel strike. Because of different requirements of dorsiflexion torque during loading response phase, selection of suitable spring for corresponding user could be important. Springs with either excessively large or small coefficients might the normal heel rocker function. In this research, an identification method based on observing tension on the spring in loading response phase was derived. We aim for simple clinical setting and availability on patients with various pathological gait patterns, especially gait asymmetry. A case study on a stroke patient with hemiplegia was conducted to evaluate effect with the identified spring. Increase of knee angle (before intervention: mean 2.118°, SD 0.418°; during intervention: mean 12.814°, SD 1.764°) and shank angular velocity to the ground (before intervention: mean 117.300°/s, SD 9.491°/s; during intervention: mean 255.875°/s, SD 34.130°/s) indicates sufficient heel rocker function could be supported during intervention of the identified tension spring in this specific case.

本文言語English
ホスト出版物のタイトル2020 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2020
出版社Institute of Electrical and Electronics Engineers Inc.
ページ738-743
ページ数6
2020-October
ISBN(電子版)9781728185262
DOI
出版ステータスPublished - 2020 10 11
イベント2020 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2020 - Toronto, Canada
継続期間: 2020 10 112020 10 14

Conference

Conference2020 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2020
国/地域Canada
CityToronto
Period20/10/1120/10/14

ASJC Scopus subject areas

  • ソフトウェア
  • 制御およびシステム工学
  • 人間とコンピュータの相互作用
  • コンピュータ サイエンスの応用
  • 電子工学および電気工学

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