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Clinical trial Recruiting at 1 site Interventional Ages 18 and up

Try the Caesar take-home foot for everyday use and running

Official title: Caesar Foot Take-Home Validation Testing

Run by Liberating Technologies, Inc. · NCT07075198 · Data updated 2026-11-12

This trial tests whether people with below‑knee amputations who are interested in running can use the bimodal Caesar foot at home for two months to see if it improves mobility and daily activity.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment18 (estimated)
SponsorLiberating Technologies, Inc.
Industry-sponsored
Locations1 site (Austin, Texas)
StatusRecruiting
StartedOctober 2025
Main results expectedAugust 2026
Study endsAugust 2026
Registry record updatedOctober 14, 2025
Trial IDNCT07075198 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults (18+) at least six months post‑transtibial amputation who are K3 or K4 ambulators, have an AMP score ≥37, are interested in running but do not yet use a running blade, have a well‑fitting socket and adequate residual limb clearance, and fit the prototype size/weight classes.

Probably not a fit

Patients who are lower‑activity (K1/K2), have recent injuries or other conditions limiting function, poor socket fit, inadequate clearance, or who cannot attend clinic visits (including non‑English speakers for this protocol) are unlikely to benefit from participation.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

Participants will complete a one‑month baseline period using their usual prosthetic foot, then take the Caesar foot home for two months, followed by a one‑month return to their usual foot. Outcomes include the Prosthetic Limb Users Survey of Mobility (PLUS‑M) as the primary measure, plus exploratory self‑report measures (PROMIS, TAPES‑R, EQ‑5D, PLUS‑F) and performance tests such as the 10‑Meter Walk Test, gait speeds, and a timed quarter‑mile. Surveys will be collected on a HIPAA‑compliant platform or paper if needed, and performance measures will be taken in clinic visits at the end of each condition. The study is sponsored by Liberating Technologies with collaborators including NICHD, Hanger Clinic, and WillowWood, and is conducted at Hanger Clinic in Austin, Texas.

Why it matters

Potential benefit: If successful, the Caesar foot could help active below‑knee amputees increase mobility and confidence for walking and running in everyday life.

How similar studies have gone: Related bimodal and running prosthetic feet have shown positive results in controlled settings, but take‑home, real‑world validation of this specific device is novel.

Who can join: the full rules

Show full inclusion / exclusion criteria 
Inclusion Criteria:

* Have transtibial limb absence of one or both limbs
* Express interest in running, but do not currently have a running blade (as determined by self-report)
* Are at least 18 years of age
* Are at least six months post amputation
* Are classified as K3 or K4 ambulator status as determined by a certified prosthetist
* Have an AMP score of at least 37
* Are capable of running safely as determined by a certified prosthetist's clinical judgement
* Have a well-fitting socket as determined by a certified prosthetist
* Have adequate clearance between distal end of the residual limb and ground for the Caesar foot
* Meets the foot size and weight class of one of the available Caesar prototypes

Exclusion Criteria:

* Present or sustained injuries to residual limb or contralateral leg affecting functional ability
* Non-English speaking participants will be excluded from this study due to limited access to interpreter services. These services would be needed for several visits, including training to learn how to use the device safely, along with requested verbal feedback from the participant to evaluate the design and usability of the system.
* Using a prosthetic foot that an individual is unfamiliar with for higher activity tasks may increase the risk of falling. Therefore, pregnant women should not participate in the study and will be screened by self-disclosure.

Individuals can be excluded at the discretion of the investigator for other unforeseen disqualifying criteria (such as specific cognitive issues, etc.).

Where it's running

  • Hanger Clinic
    Austin, Texas, United States     Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
View on ClinicalTrials.gov ↗ Find more trials like this →
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Prosthesis User 10Lower Limb Amputation Below Knee (Injury) 6Liberating Technologies, Inc. 6
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.