Study of Locomotor Expectations for Ascending/descending Slope and Stairs in Patients with Limb Amputations (JCE)

University Hospital Center (CHU) Dijon Bourgogne

Status

Enrolling

Conditions

Lower Limb Amputation

Treatments

Other: 3D analysis of walking and balance

Other: Functional analyses

Study type

Observational

Funder types

Other

Identifiers

NCT04030650

CASILLAS 2018-1

Details and patient eligibility

About

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.

Enrollment

70 estimated patients

Sex

All

Ages

18+ years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

Healthy volunteers:

person who has given oral consent
male or female adult
person being able to understand simple orders, locomotion instructions

Lower limb amputee patients:

person who has given oral consent
male or female adult
patient with unilateral major lower limb amputation of any origin (traumatic, vascular, infectious, congenital or neoplastic) with definitive equipment used routinely for at least 3 months.
person able to understand simple orders, locomotion instructions

Exclusion criteria

person not affiliated or not benefiting from a heath insurance system
person subject to a legal protection measure (curatorship, guardianship)
person with a legal guardian
pregnant or breastfeeding woman
adult unable to consent
person with a dislocated hip
subject with conditions or disabilities other than amputation that affect walking