PTOTOtherJMIR rehabilitation and assistive technologies2025

Evidence-Generated Sockets for Transtibial Prosthetic Limbs Compared With Conventional Computer-Aided Designs: A Multiple-Methods Study From the Patient's Perspective.

Florence Mbithi, Maggie Donovan-Hall, Jennifer Bramley and 15 others

PMID 40840190

WHAT IT FOUND

Automated socket designs matched prosthetist-made ones for comfort at fitting.

But patients reported that only human-led adjustments fixed specific pain points. Use automated templates as a starting point, but keep the prosthetist in the loop to handle individual tissue sensitivity and preferences.

Key findings

01There was no statistically significant difference in comfort scores between evidence-generated (automated) sockets and conventional computer-aided designs made by prosthetists.

02Patients reported that automated designs failed to address specific areas of tissue sensitivity, whereas prosthetist-led modifications resolved these issues.

03The study used a single-blind crossover design where patients compared two sockets at one fitting session, rather than tracking long-term use.

STILL TO COME

How it was doneWhat they foundWhat it means for PTsWhat it means for OTs

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What it does not show

The study was not formally randomized; prosthetists chose which socket to fit first, which introduces potential carryover effects. Recruitment was via convenience sampling, resulting in a cohort that was predominantly male (16 of 17) and older than the general amputee population, limiting generalizability. The assessment was at a single timepoint (initial fitting), so it does not reflect how comfort and function might change over weeks or months of wear. The automated designs were based on data from a single center, which may not represent the diversity of clinical practices or patient populations elsewhere.

Declared interests

Several authors are employed by or hold shares in Radii Devices Ltd, the company developing the evidence-generated socket technology. Others are employed by Opcare Ltd, the service provider that supplied the clinical data and expert design insight.

The easy way to misread this

Do not interpret the lack of significant difference in comfort scores as evidence that automated design can replace prosthetist involvement. The study found that while average comfort was similar, the automated method failed to address specific individual pain points that human experts successfully managed.

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