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Updated: Jul 6, 2025

Bioelectric Analyses of an Osseointegrated Intelligent Implant Design System for Amputees
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A pneumatic reconfigurable socket for transtibial amputees.

Saeed Mollaee1, Rita Q Fuentes-Aguilar2, Joel C Huegel3

  • 1Auckland Bioengineering Institute, The University of Auckland, Auckland, New Zealand.

International Journal for Numerical Methods in Biomedical Engineering
|January 8, 2024
PubMed
Summary

A novel reconfigurable prosthetic socket improves transtibial amputee satisfaction by reducing interface pressure and accommodating volume fluctuations. This innovative design enhances comfort and fit for prosthesis users.

Keywords:
finite element analysisprosthetic limbreconfigurable socketsoft roboticstranstibial amputees

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Area of Science:

  • Prosthetics and Orthotics
  • Biomedical Engineering
  • Rehabilitation Science

Background:

  • Socket fit is crucial for transtibial amputee satisfaction with prosthetic use.
  • Residual limb volume fluctuations and pressure on sensitive areas significantly impact socket fit.
  • Current prosthetic sockets often struggle to adapt to these dynamic changes.

Purpose of the Study:

  • To develop and evaluate a reconfigurable prosthetic socket for transtibial amputees.
  • To address critical factors of socket fit: pressure distribution and volume compensation.
  • To enhance user satisfaction through improved prosthetic socket design.

Main Methods:

  • Utilized computed tomography (CT) scans to create a 3D phantom limb model.
  • Manufactured a reconfigurable prosthetic socket based on the phantom limb data.
  • Performed experimental testing and finite element modeling (FEM) for performance evaluation.

Main Results:

  • The reconfigurable socket effectively shifts pressure away from sensitive areas.
  • Demonstrated compensation for residual limb volume fluctuations.
  • Achieved up to a 61% reduction in interface pressure at targeted areas.

Conclusions:

  • The reconfigurable prosthetic socket offers a significant improvement in fit and comfort for transtibial amputees.
  • This technology has the potential to increase satisfaction and functionality for prosthesis users.
  • The study validates the effectiveness of reconfigurable socket technology in addressing key challenges in prosthetic use.