Prosthetic Performance Enhancement Trial

NCT ID: NCT06419920

Last Updated: 2025-12-24

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

35 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-06-26

Study Completion Date

2026-11-30

Brief Summary

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The purpose of this research is to determine the feasibility of an uneven terrain walking program for lower limb prosthesis users. The training is designed to induce step-to-step variability during walking within a safe environment, with the aim of improving walking skill and confidence.

Detailed Description

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Despite advances in the technology for artificial limbs (prostheses), falling and the fear of falling continue to be barriers to mobility for many lower limb prosthesis users after their initial rehabilitation. The loss of ability and confidence in pursuing everyday tasks negatively impacts quality of life, and ongoing physical and mental health. This study will test and improve a rehabilitation training intervention involving walking on uneven ground to improve walking skill and confidence in lower limb prosthesis users.

Lower limb prosthesis users will be recruited. Participants will be allocated randomly to receive either intervention A: training on a flat surface, or intervention B: training on an uneven surface. Depending on their ability and confidence, participants will complete the walking practice either on a treadmill or on a mat with an identical surface pattern. The walking practice will take place three times per week for four weeks. As each participant improves their ability, training tasks will be made more difficult by limiting handrail use, by increasing walking speed, and, for intervention B, also by making the walking surface more uneven.

The objectives of this pilot study are to evaluate adherence and refine the training protocols in preparation for a definitive trial that will inform rehabilitation practices.

Conditions

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Amputation Lower Limb Amputation Below Knee (Injury) Lower Limb Amputation Above Knee (Injury) Lower Limb Amputation at Ankle (Injury) Lower Limb Amputation Knee Lower Limb Amputation at Hip (Injury)

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Feasibility study incorporating a single-blinded Phase I clinical trial with a parallel groups design, involving two treatment conditions: uneven terrain training (UT) and flat terrain (FT) training. Participants will be allocated randomly to UT and FT arms in a 6:1 ratio.
Primary Study Purpose

OTHER

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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Flat terrain training

Walking on a standard, flat treadmill or mat.

Group Type ACTIVE_COMPARATOR

Flat terrain locomotor training

Intervention Type OTHER

The training will be comprised of up to 12 sets of 2-min continuous walking on a level treadmill or mat, interspersed with rest breaks of at least one minute. Training will be completed three times per week for four weeks.

Uneven terrain training

Walking on an uneven terrain treadmill or mat.

Group Type EXPERIMENTAL

Uneven terrain locomotor training

Intervention Type OTHER

The training will be comprised of up to 12 sets of 2-min continuous walking on an uneven terrain treadmill or mat, interspersed with rest breaks of at least one minute. Training will be completed three times per week for four weeks.

Interventions

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Flat terrain locomotor training

The training will be comprised of up to 12 sets of 2-min continuous walking on a level treadmill or mat, interspersed with rest breaks of at least one minute. Training will be completed three times per week for four weeks.

Intervention Type OTHER

Uneven terrain locomotor training

The training will be comprised of up to 12 sets of 2-min continuous walking on an uneven terrain treadmill or mat, interspersed with rest breaks of at least one minute. Training will be completed three times per week for four weeks.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* lower limb amputation at ankle (Symes) level and above
* age 18+ years
* fitted with a walking prosthesis and use it regularly for home and/or community ambulation
* good socket fit, assessed by a score of 8-10 on the socket fit comfort scale
* able to walk for three minutes at a time with or without an assistive device

Exclusion Criteria

* leg/foot ulcer or other conditions that cause pain during weight-bearing
* poor skin integrity that could cause tissue breakdown by walking
* cardiovascular, respiratory or other critical health conditions that preclude moderate physical activity
* unilateral or bilateral upper limb absence or loss at the wrist and above that precludes use of handrails bilaterally, or would require asymmetrical adaptation to body posture for use.
* pregnancy
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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University of Washington

OTHER

Sponsor Role collaborator

Chapman University

OTHER

Sponsor Role collaborator

United States Department of Defense

FED

Sponsor Role collaborator

National Institutes of Health (NIH)

NIH

Sponsor Role collaborator

University of Nevada, Las Vegas

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Jenny A Kent, PhD, CSci

Role: PRINCIPAL_INVESTIGATOR

University of Nevada, Las Vegas

Locations

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University of Nevada Las Vegas

Las Vegas, Nevada, United States

Site Status RECRUITING

Countries

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United States

Central Contacts

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Jenny A Kent, PhD, CSci

Role: CONTACT

Phone: 7028955949

Email: [email protected]

Facility Contacts

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Jenny A Kent, PhD, CSci

Role: primary

Other Identifiers

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CDMRP-OP230011

Identifier Type: OTHER_GRANT

Identifier Source: secondary_id

UNLV-2023-595

Identifier Type: -

Identifier Source: org_study_id