中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (13): 2005-2010.doi: 10.12307/2023.258

• 骨与关节生物力学 bone and joint biomechanics • 上一篇    下一篇

糖尿病患者步态周期不同时刻的足底压力及中底结构设计

曹子君1,2, 王  芳1,2,李雪梅3,李明新4,何耀广1,2,张  宇1,2,杨  涛1,2,刘国庆1,2, 张建国1,2   

  1. 1天津科技大学机械工程学院,天津市   300222;2天津市轻工与食品工程机械装备集成设计与在线监控重点实验室,天津市   300222;3天津医科大学代谢病医院,天津市   300070;4天津医院,天津市   300211
  • 收稿日期:2022-01-21 接受日期:2022-04-18 出版日期:2023-05-08 发布日期:2022-08-11
  • 通讯作者: 王芳,博士,副教授,天津科技大学机械工程学院,天津市 300222;天津市轻工与食品工程机械装备集成设计与在线监控重点实验室,天津市 300222 张建国,硕士,教授,天津科技大学机械工程学院,天津市 300222;天津市轻工与食品工程机械装备集成设计与在线监控重点实验室,天津市 300222
  • 作者简介:曹子君,男,1990年生,山西省大同市人,天津科技大学在读博士,主要从事人体生物力学和糖尿病防护鞋具研究。
  • 基金资助:
    国家自然科学基金项目(12102301),项目负责人:王芳

Plantar pressure at different phases during gait cycle in diabetic patients and midsole structure design

Cao Zijun1, 2, Wang Fang1, 2, Li Xuemei3, Li Mingxin4, He Yaoguang1, 2, Zhang Yu1, 2, Yang Tao1, 2, Liu Guoqing1, 2, Zhang Jianguo1, 2   

  1. 1College of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin 300222, China; 2Tianjin Key Laboratory of Light Industry and Food Engineering Machinery Equipment Integrated Design and Online Monitoring, Tianjin 300222, China; 3Metabolic Disease Hospital, Tianjin Medical University, Tianjin 300070, China; 4Tianjin Hospital, Tianjin 300211, China
  • Received:2022-01-21 Accepted:2022-04-18 Online:2023-05-08 Published:2022-08-11
  • Contact: Wang Fang, PhD, Associate professor, College of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin 300222, China; Tianjin Key Laboratory of Light Industry and Food Engineering Machinery Equipment Integrated Design and Online Monitoring, Tianjin 300222, China Zhang Jianguo, Master, Professor, College of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin 300222, China; Tianjin Key Laboratory of Light Industry and Food Engineering Machinery Equipment Integrated Design and Online Monitoring, Tianjin 300222, China
  • About author:Cao Zijun, Doctoral candidate, College of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin 300222, China; Tianjin Key Laboratory of Light Industry and Food Engineering Machinery Equipment Integrated Design and Online Monitoring, Tianjin 300222, China
  • Supported by:
    the National Natural Science Foundation of China, No. 12102301 (to WF)

摘要:

文题释义:
步态周期:行走中一侧足跟触地到该侧足跟再次触地的过程。步态周期包含摆动相和支撑相,摆动相是一侧足部从离开地面到再次触地的时期,支撑相是足部触地并承重的时期。
中底:鞋底中处于鞋垫与外底之间的结构。功能特点是减压、缓冲与回弹,改善舒适度,减少足部与地面冲击所产生的损伤,以及提升运动表现。

背景:足底压力过高是导致糖尿病足溃疡的因素之一,研究糖尿病患者步态周期内不同时刻的足底压力有助于设计防护鞋具。
目的:分析糖尿病患者足跟撞击和前掌推离时刻的足底压力,设计中底结构,优化减压效果。
方法:开展足底压力试验,分析糖尿病神经病变患者、无神经病变的糖尿病患者与健康人在足跟撞击和前掌推离时刻的足底压力差异。构建足部有限元模型,设计乙烯-醋酸乙烯酯共聚物中底和不同模量的热塑性聚氨酯菱形晶格中底,分析神经病变患者使用不同中底时足跟撞击和前掌推离时刻的足底压力及软组织应力变化,优化糖尿病防护鞋结构尺寸。
结果与结论:①神经病变组前掌推离时刻的足底压力峰值比健康对照组高22.2%,差异有显著性意义(P < 0.05);②乙烯-醋酸乙烯酯共聚物中底使神经病变患者足跟撞击和前掌推离时刻的足底压力峰值分别降低13.0%和12.9%,使软组织应力峰值分别降低18.2%和11.1%;③优化的菱形晶格结构将患者2个时刻的足底压力峰值分别降低41.6%和48.4%,将软组织应力峰值分别降低41.4%和49.8%;④提示开发糖尿病防护鞋具应重视对前掌推离时刻的减压,菱形晶格结构能实现比传统乙烯-醋酸乙烯酯共聚物中底更好的效果。

https://orcid.org/0000-0002-9085-4784 (曹子君) 

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱;骨折;内固定;数字化骨科;组织工程

关键词: 糖尿病, 足底压力, 步态, 生物力学, 有限元分析, 鞋具, 中底, 晶格结构

Abstract: BACKGROUND: High plantar pressure is one of the critical factors causing diabetic foot ulcers. Studying the plantar pressure in multi-phase during gait cycle of diabetic patients contributes to offloading footwear development.  
OBJECTIVE: To analyze the plantar pressure distribution in diabetic patients at heel strike and push off, and design midsole to optimize offloading effect.
METHODS:  Plantar pressure was tested to analyze the difference in plantar pressure at heel strike and push off between diabetics patients with diabetic peripheral neuropathy and without diabetic peripheral neuropathy and healthy subjects. Finite element model of foot was constructed. Ethylene vinyl acetate copolymer midsole and thermoplastic polyurethane diamond lattice structure midsole with different modulus were designed. Changes in plantar pressure and stress of soft tissue at heel strike and push off in diabetic peripheral neuropathy patient were analyzed to optimize the structure size of diabetes footwear.  
RESULTS AND CONCLUSION: (1) The peak plantar pressure at push off in diabetic peripheral neuropathy group (22.2%)  was higher than healthy control group (P < 0.05). (2) Ethylene vinyl acetate copolymer midsole reduced the peak plantar pressure at heel strike and push off by 13.0% and 12.9%, reduced the peak stress of soft tissue at two phases by 18.2% and 11.1%. (3) The optimized diamond lattice structure reduced the peak plantar pressure at two phases by 41.6% and 48.4%, reduced the peak stress of soft tissue at two phases by 41.4% and 49.8%. (4) In conclusion, offloading at push off should be noticed in development of diabetic footwear. The diamond lattice structure midsole could archive better effect than ethylene vinyl acetate copolymer midsole.

Key words: diabetes, plantar pressure, gait, biomechanics, finite element analysis, footwear, midsole, lattice structure

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