Your browser doesn't support javascript.
loading
Identification of excessive contact pressures under hand orthosis based on finite element analysis.
Tan, Xinyang; Ahmed-Kristensen, Saeema; Zhu, Qian; Han, Ting; Zhu, Lei; Chen, Wei; Cao, Jiangang; Nanayakkara, Thrishantha.
Afiliación
  • Tan X; School of Design, Shanghai Jiao Tong University, Shanghai, China.
  • Ahmed-Kristensen S; INDEX, Business School, University of Exeter, London, UK.
  • Zhu Q; Department of Rehabilitation Medicine, The Affiliated Xuzhou Rehabilitation Hospital of Xuzhou Medical University, Xuzhou, China.
  • Han T; School of Design, Shanghai Jiao Tong University, Shanghai, China.
  • Zhu L; Dyson School of Design Engineering, Imperial College London, London, UK.
  • Chen W; Department of Rehabilitation Medicine, The Affiliated Xuzhou Rehabilitation Hospital of Xuzhou Medical University, Xuzhou, China.
  • Cao J; Department of Assistive Technology, International University of Health and Welfare, Otawara, Japan.
  • Nanayakkara T; Dyson School of Design Engineering, Imperial College London, London, UK.
Prosthet Orthot Int ; 2024 May 21.
Article en En | MEDLINE | ID: mdl-38771762
ABSTRACT

BACKGROUND:

Implicit magnitudes and distribution of excessive contact pressures under hand orthoses hinder clinicians from precisely adjusting them to relieve the pressures. To address this, contact pressure under a hand orthosis were analysed using finite element method.

METHODS:

This paper proposed a method to numerically predict the relatively high magnitudes and critical distribution of contact pressures under hand orthosis through finite element analysis, to identify excessive contact pressure locations. The finite element model was established consisting of the hand, orthosis and bones. The hand and bones were assumed to be homogeneous and elastic bodies, and the orthosis was considered as an isotropic and elastic shell. Two predictions were conducted by assigning either low (fat) or high (skin) material stiffness to the hand model to attain the range of pressure magnitudes. An experiment was conducted to measure contact pressures at the predicted pressure locations.

RESULTS:

Identical pressure distributions were obtained from both predictions with relatively high pressure values disseminated at 12 anatomical locations. The highest magnitude was found at the thumb metacarpophalangeal joint with the maximum pressure range from 13 to 78 KPa. The measured values were within the predicted range of pressure magnitudes. Moreover, 6 excessive contact pressure locations were identified.

CONCLUSIONS:

The proposed method was verified by the measurement results. It renders understanding of interface conditions underneath the orthosis to inform clinicians regarding orthosis design and adjustment. It could also guide the development of 3D printed or sensorised orthosis by indicating optimal locations for perforations or pressure sensors.
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Prosthet Orthot Int Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Francia
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Prosthet Orthot Int Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Francia