Assessment of Disability Compensation With the C-LEG COMPACT 2 Knee (Ref. 3C60 et 3C60=ST)

Study Overview
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Brief Summary
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Moderately active amputees may have lost their limb due to diabetes, vascular conditions, trauma, tumour or congenital causes. These amputees currently cannot benefit from having a computerised knee because of the performance criteria associated with being given one. However, these amputees have a very high risk of falling because they use a non microprocessor controlled knee joint (NMPK) and because their physical ability, associated disability and persistent contralateral leg weakness do not allow them to compensate for a balance deficit. These amputees restrict how much they move around and their participation because of their instability and elevated risk of falling. The objective of the study is to evaluate the effect of the 3C60 knee, a microprocessor-controlled knee joint for external leg prosthesis, on the reduction in the risk of falling after three months in moderately active persons with leg amputation above knee or knee disarticulation.

Detailed Description
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The patient will be evaluated after one month of using his/her usual non micropressor controlled knee joint (NMPK). After fitting of the 3C60, the patient will undergo at least five rehabilitation sessions, adapted to his/her individual needs, so that he/she knows how to use the device and is ready to go along with the planned testing. After the trial with the 3C60 knee, the patient will again be fitted with his/her non microprocessor controlled knee joint (NMPK) and will be required to undergo one rehabilitation session to regain his/her walking abilities.

Official Title
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Randomized, Cross-over Study Comparing the Efficacy of the 3C60 Knee Against Non-microprocessor Controlled Knees on the Risk of Falling and Locomotor Skills of Moderately Active Persons With Leg Amputation Above Knee or Knee Disarticulation

Conditions
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Amputation of Hip and Thigh, Level Unspecified

Intervention / Treatment
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* Device: 3C60-NMPK
* Device: NMPK-3C60


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Person with leg amputation above knee or knee disarticulation with stabilized residual limb Person who are currently fitted with a prosthesis using a non-microprocessor controlled prosthetic knee Person with a high risk of falling, which is defined as a TGUG test score of more than 19 seconds Person who moves around within buildings other than one's residence, such as moving around other people's homes, other private buildings, community and private or public buildings and enclosed areas, moving throughout all parts of buildings and enclosed areas, between floors, inside, outside and around buildings, both public and private Person who moves around outside the home and other buildings, such as walking and moving around close to or far from one's home and other buildings, without the use of transportation, public or private, such as walking for short or long distances around a town or village, walking or moving down streets in the neighbourhood, town, village or city; moving between cities and further distances, without using transportation Person with a daily walking distance greater than 300 m Exclusion Criteria: Persons using underarm crutches or walkers Persons under 18 years of age Persons who weigh more than 125 kg Pregnant women Persons in an emergency situation Persons who cannot personally provide their consent Persons who are not available to follow the entire study protocol

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: NMPK-3C60<br>D0 + 30 days: evaluation with the non-microprocessor knee. D1 + 90 days: evaluation with the 3C60 knee. | Device: 3C60-NMPK<br>* 3 months with 3C60 - 10 days wash out - 1 month with NMPK<br>* Other names: Mechanical knee joint;|
| Other: 3C60-NMPK<br>D0 + 90 days: evaluation with the 3C60 knee. A period of 10 days of wash out. D1 + 30 days: evaluation with the non-microprocessor knee. | Device: NMPK-3C60<br>* 1 month with NMPK - 3 months with 3C60<br>* Other names: KENEVO;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Timed Get Up and Go (TGUG) | This test consists of recording the amount of time needed for a person to stand up from a chair, walk 3 metres, make a half-turn and sit down again. The TGUG test score reflects a person's balance and as a consequence, the risk of falling. | Measurement will be performed at 3 months with 3C60 and at 1 month with NMPK | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Locomotor Capabilities Index (LCI-5) | The Locomotor Capabilities Index (LCI-5) is a 14 item self-assessment questionnaire filled in by the patient that explores walking and ambulation. The LCI-5 is derived from the Prosthesis Profile of the Amputee Questionnaire (PPA). LCI-5 is sensitive to the use of walking aids or to the need of a third party. Ceiling effect is not expected with moderately active amputees. The global LCI-5 score is the addition of the 14 scores, noted between 0 and 4. The global score varies between 0 and 56, the highest being for persons with high locomotors capabilities. LCI-5 has two sub-scores: the basic score corresponds to 7 questions related to basic activities and the advanced score corresponds to 7 questions related to more advanced activities. The basic and advanced scores both range from 0-28. Higher scores correspond with a better outcome. | Measurement will be performed at 3 months with 3C60 and at 1 month with NMPK | 
| Use of Walking Aids | The type of walking aids used with each device will be recorded. | Measurement will be performed at 3 months with 3C60 and at 1 month with NMPK | 
| QUEST 2.0 Satisfaction Questionnaire (QUEST 2.0-G: German Version / ESAT: French Version) | It is a self-evaluation questionnaire of the user's satisfaction, translated in French (ESAT) and in German (QUEST 2.0-G Section 17.5). The QUEST 2.0 questionnaire contains 8 items that evaluate the device's technology and 4 items that evaluate services surrounding the device. It allows patients to express themselves on the criteria that are most important to them. Each item has a score that varies between 0 (not satisfied at all) and 5 (very satisfied). The global score is the average obtained onto the 12 items. Two sub-scores related to the technology and services can also be calculated. They correspond to the average of the 8 first items and to the 4 last items respectively. All scores ranks between 0 and 5, 5 being the highest level of satisfaction. | Measurement will be performed at 3 months with 3C60 and at 1 month with NMPK | 
| SF-36v2™ Health Survey | 36-Item Short Form Health Survey (SF-36v2TM) explores 8 dimensions of quality of life through 36 questions: PF= Physical Functioning (10 items), RP= Role Physical (4 items), BP = Bodily Pain (2 items), SF= Social Functioning (2 items), MH= Mental Health (5 items), RE= Role emotional (3 items), VT= Vitality (4 items), GH= General Health (5 items). All of the eight health domain scales contributes with different levels to score two component summary measures: PCS= Physical Component Summary and MCS= Mental Component Summary. All scores are calculated online through scoring software. Domain scales and component summary are ranging from 0 to 100. A high score is considered to be a better outcome, as indicating little or no problem. | Measurement will be performed at 3 months with 3C60 and at 1 month with NMPK | 
| Number of Falls |  | Measurement will be performed at 1 month with both devices | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Moderately active amputees, C-leg Compact, Knee prosthesis, Kenevo, Microprocessor controlled knee, Amputation, 3C60, Timed Get Up and Go (TGUG), Locomotors Capacities Index (LCI), QUEST, Short Form survey (SF-36)