Analysis and evaluation of plastic ankle foot orthosis (PAFO) based on quantitative data

• Project/Area Number: 24500666
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Rehabilitation science/Welfare engineering
• Research Institution: Kinki University
• Principal Investigator: KITAYAMA Ichiro 近畿大学, 生物理工学部, 准教授 (80426535)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 短下肢装具 / プラスチック短下肢装具 / 歩行分析 / シミュレーション / 有限要素解析

Outline of Final Research Achievements

This study reports on an analysis of the deformation and stress on an orthosis using its 3D shape data and finite element analysis software. The analysis is based on orthosis load data obtained from ambulatory data of healthy participants and orthosis users. First, the forces acting on an orthosis during ambulation of participants were measured using a six-axis force torque sensor installed in the calf section. The data revealed that there is a significant difference in anterior-posterior loads, which may be an important evaluation index of orthotic ambulation, between orthosis users and healthy participants. These data were applied as an external force to the orthosis shape obtained using a scanner and subjected to finite element analysis. Then, we analyze stress concentrations and deformations of orthoses modified by trimming when a given load was applied to them.

Research Products

• [Journal Article] プラスチック短下肢装具歩行時の立脚相機能の計測 (2014)
  • Author(s): 斉藤佑典，北山一郎，小山秀世，森本高史，園部秀樹
  • Journal Title: 実験力学 Volume: Vol.14 No.1 Pages: 9-15
  • NAID: 130004489849
  • Peer Reviewed
• [Journal Article] Kinematic Analysis of Plastic Ankle-Foot Orthosis Using Force Sensors (2013)
  • Author(s): Ichiro KITAYAMA, Tubasa KAWAUCHI, Ryoji TAKAHATA and Noriyasu HIROKAWA
  • Journal Title: Journal of JSME Volume: Vol.13 Special Issue
  • NAID: 10031189823
  • Peer Reviewed
• [Journal Article] Mechanical Analysis of Plastic Ankle Foot Orthosis (2012)
  • Author(s): Ichiro KITAYAMA, Tubasa KAWAUCHI, Ryoji TAKAHATA and Noriyasu HIROKAWA
  • Journal Title: Proceedings of ISEM'12 Volume: ISEM2012 proceedings
  • Peer Reviewed
• [Presentation] プラスチック短下肢装具使用時の歩行分析データに基づく有限要素解析 (2015)
  • Author(s): 中野耕助，北山一郎，北野将利，山中 隆，大政光史
  • Organizer: 日本機械学会 関西支部
  • Place of Presentation: 京都大学桂キャンパス（京都府京都市）
  • Year and Date: 2015-03-16 – 2015-03-17
• [Presentation] 荷重データにもとづく有限要素解析によるプラスチック短下肢装具の分析 (2014)
  • Author(s): 中野耕助，北山一郎，北野将利，山中 隆，大政光史
  • Organizer: 日本臨床バイオメカニクス学会
  • Place of Presentation: 奈良県新公会堂（奈良県奈良市）
  • Year and Date: 2014-11-21 – 2014-11-22
• [Presentation] プラスチック短下肢装具の有限要素解析 (2014)
  • Author(s): 中野耕助，北山一郎，北野将利，山中 隆，大政光史
  • Organizer: 電気学会 知能メカトロニクス専門委員会
  • Place of Presentation: 高野山宝城院（和歌山県伊都郡高野山）
  • Year and Date: 2014-07-12 – 2014-07-13
• [Presentation] 装具装着者歩行中に装具にかかる荷重の分析 (2014)
  • Author(s): 北野将利，中野耕助，山中 隆，北山一郎
  • Organizer: ヒューマンサポートサイエンス学会
  • Place of Presentation: (株)アルトナー江坂ラーニングセンター（大阪府大阪市）
  • Year and Date: 2014-06-28
• [Presentation] 有限要素法（FEM）を用いたプラスチック短下肢装具の分析 (2014)
  • Author(s): 中野耕助，北野将利，山中 隆，北山一郎
  • Organizer: ヒューマンサポートサイエンス学会
  • Place of Presentation: (株)アルトナー江坂ラーニングセンター（大阪府大阪市）
  • Year and Date: 2014-06-28
• [Presentation] 力学的データに基づくプラスチック短下肢装具機能の分析 (2013)
  • Author(s): 斉藤佑典，中野耕助，宇﨑恭平，中家都嵩，北山一郎
  • Organizer: 日本設計工学会2013年度秋季研究発表講演会
  • Place of Presentation: 名城大学（愛知県）