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Study of Locomotor Expectations for Ascending/Descending Slope and Stairs in Patients With Limb Amputations

NCT04030650 · Status: RECRUITING · Type: OBSERVATIONAL · Enrollment: 70

Last updated 2026-03-20

No results posted yet for this study

Summary

Patients with lower limb amputations are equipped with prostheses that can be mechanical and/or electronic. These prostheses can be mono-articular (only the ankle) or bi-articular (knee and ankle for example). For amputee patients, situations that may seem trivial, such as climbing and descending stairs, become complex. Thus during the descent of stairs, an unamputated person will slow down the descent by contracting the thigh muscles, which are obviously lacking in the amputee patient. Current prostheses, known as "intelligent" (or "microprocessor") prostheses, make it possible to adjust the locomotion only once the first step has been taken and to assist the patient during ascent/descent situations on slopes and stairs. The next technological challenge in the development of lower limb equipment is to be able to anticipate these complex environmental situations, in order to secure and facilitate movement even before the obstacle is crossed or the terrain changed.

This project plans to use the locomotor expectations commonly made during walking as a means of regulating the locomotor pattern. We believe that these expectations will depend on the situation, i.e. a particular anticipation when climbing or descending a slope, or when approaching a staircase, etc. To understand and describe these locomotor expectations, we plan to use recent techniques called supervised machine learning. These will make it possible to classify locomotor behaviour when walking on a slope or stairs. In the second phase, we would like to describe precisely the characteristics of the movements of the joints, and of the muscles during these adaptations. The final objective of this work is to create an autonomous sensor system to control the anticipatory behaviour of a lower limb prosthesis.

Conditions

  • Lower Limb Amputation

Interventions

OTHER

Functional analyses

2-minute walking test 200-metre walking test

OTHER

3D analysis of walking and balance

Walking analysis Balance analysis Analysis of the strength of the flexor and extensor muscles of the trunk and lower limb

OTHER

Functional analyses

400-metre walking test 200-metre walking test

Sponsors & Collaborators

  • Centre Hospitalier Universitaire Dijon

    lead OTHER

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2019-09-20
Primary Completion
2028-05-31
Completion
2028-05-31

Countries

  • France

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT04030650 on ClinicalTrials.gov