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Related Experiment Videos

Risk analysis for a radio-carpal joint replacement.

D E T Shepherd1

  • 1Department of Bio-Medical Physics and Bio-Engineering, University of Aberdeen, Foresterhill, Scotland, UK.

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
|March 23, 2002
PubMed
Summary

This study details a risk analysis for the Swanson wrist implant, identifying key hazards like implant fracture and silicone synovitis. These findings will inform the design of improved rheumatoid wrist replacement devices.

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Orthopedic Surgery

Background:

  • Medical device directives mandate rigorous risk analysis to ensure patient and healthcare worker safety.
  • Rheumatoid wrist arthritis often necessitates joint replacement, with current implants facing specific challenges.
  • Implantable-grade silicone elastomers are commonly used in orthopedic implants.

Purpose of the Study:

  • To conduct a comprehensive risk analysis for the Swanson wrist implant.
  • To identify and evaluate potential hazards associated with the silicone elastomer implant.
  • To inform the design and development of a next-generation rheumatoid wrist implant.

Main Methods:

  • Systematic hazard identification process specific to the Swanson wrist implant.

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  • Evaluation of failure modes, including material degradation and mechanical stress.
  • Assessment of biocompatibility and potential adverse tissue reactions.

    • Main Results:

    • The primary identified hazards include implant fracture and the occurrence of silicone synovitis.
    • The risk analysis highlighted the critical need for enhanced material durability and biocompatibility.
    • Specific failure modes were quantified to guide design modifications.

    Conclusions:

    • The risk analysis provides crucial data for improving the safety and efficacy of wrist implants.
    • Addressing identified hazards is essential for reducing revision surgeries and improving patient outcomes.
    • The findings will directly influence the design of a safer and more robust Swanson wrist implant.