Using computational simulation to aid in the prediction of socket fit: a preliminary study

Area of Science:

• Biomedical Engineering
• Rehabilitation Engineering

Background:

• Prosthetic socket fit is crucial for amputee comfort and function.
• Current methods for assessing socket fit can be time-consuming and subjective.
• Predicting optimal socket fit before fabrication is a significant challenge.

Purpose of the Study:

• To utilize computational analysis for predicting prosthetic socket fit.
• To evaluate the effectiveness of finite element analysis in assessing socket-limb interface pressure against pain thresholds.
• To demonstrate a novel approach for efficient prosthetic socket design and fabrication.

Main Methods:

• An indentation test was performed on a trans-tibial amputee's residual limb to determine pain threshold pressure.
• Computational finite element (FE) analysis was employed to model interface pressures.
• Socket fit was assessed by comparing FE-derived pressures with the pain threshold.

Main Results:

• The study successfully predicted prosthetic socket fit using computational analysis.
• A new prosthetic socket was fabricated based on the computer-aided assessment and achieved a successful fit.
• The proposed method demonstrated efficiency in evaluating and re-designing prosthetic sockets.

Conclusions:

• Computational analysis, specifically FE modeling, offers a promising and efficient tool for predicting prosthetic socket fit.
• This approach can potentially reduce the need for multiple socket iterations, improving patient outcomes and reducing costs.
• Further research is recommended to validate and refine this computational method for broader clinical application.