Clinical trial NCT04630457: Safety and Effectiveness of Electronically Controlled Prosthetic Ankle
Official title: Safety and Effectiveness of Electronically Controlled Prosthetic Ankle in Patients With Transtibial Amputation
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: Amputation
Lead sponsor: Veterans Health Service Medical Center, Seoul, Korea
Sponsor class: OTHER
Collaborators: name: Asan Medical Center
name: Chungnam National University Hospital
First posted: 2020-11-16
Enrollment: 42
Sex: ALL
Minimum age (years): 19
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Intervention model description: This study is a Prospective Randomized crossover study. After randomization, the study is conducted by dividing group A (order of existing prosthesis-Meridium prosthesis-RoFT prosthesis) and B (order of existing prosthesis-RoFT prosthesis-Meridium prosthesis).
Primary purpose: SUPPORTIVE_CARE

Brief summary: In this study, we aim to compare the three types of prosthetic limbs: the passive prosthetic limb that the patients have been using so far, the 'RoFT', a prosthetic limb developed by the Korea Institute of Machinery \& Materials, and the Meridium of Ottobock in terms of safety and effectiveness.

Detailed description: In this study, the investigators will compare the safety and effectiveness of RoFT, a robotic ankle prosthesis developed by a Korea Institute of Machinery \& Materials, Meridium of Ottobock Co., a representative commercial ankle-type robotic prosthesis, passive prosthetic limb that the patients have been using so far.

In order to compare the above three types of prostheses in terms of their effectiveness and safety, the robotic prosthesis will be evaluated after 30 minutes of familiarization after applying, and the evaluation interval using the two types of robotic prostheses will be 2 weeks to eliminate the carryover effect. For evaluation, 3D motion analysis, dynamic EMG analysis, energy consumption analysis, 6 minute walk test, Berg balance scale, Locomotor Capabilities Index, and Korean-Prosthesis Evaluation Questionnaire will be used.

For safety analysis, any kinds of safety issues including skin abrasion, bone fracture, or tendon/ligament injury due to fall down injury will be recorded and categorized for statistical analysis.

Eligibility criteria: Inclusion Criteria:

1. Among patients who visited each hospital's rehabilitation department after IRB approval
2. Adults over 19 years old
3. One side transtibial amputee
4. 6 months or more from the date of amputation of the lower extremities
5. Use of the same conventional passive prosthesis for at least the last 3 months
6. Factors of K level 2 or higher (have the ability to cross low-level environmental barriers such as curbs, stairs or uneven surfaces)
7. Those who understand and agree to the test description
8. Those who did not have skin lesions on the amputation at the time of study registration
9. At least 25cm of free space from the bottom connection of the socket to the floor

Exclusion Criteria:

1. When cognitive function is deteriorated and it is impossible to independently decide to participate in research or participate in evaluation
2. Contraindications to weight-bearing of the lower extremities such as severe lower extremity joint contracture, osteoporosis, and untreated fractures
3. Patients who underwent orthopedic surgery on the lower extremities within 6 months of starting the study
4. Cardiovascular disease, venous thrombosis or heart failure, respiratory disease that may affect heart function during exercise load
5. In the presence of pain in the musculoskeletal system other than amputation that affects gait
6. Stump length over 25cm
7. Subjects judged by other testers to be unsuitable for this study

Primary outcomes:
measure: Analysis of Changes in Three-dimensional motion during walking
timeFrame: (1st visit, day 1)existing conventional prosthesis - (2nd visit, day 15)1st Microprocessor ankle prosthesis - (3rd visit, day 29) 2nd Microprocessor ankle prosthesis
measure: Analysis of Changes in dynamic EMG during walking
timeFrame: (1st visit, day 1)existing conventional prosthesis - (2nd visit, day 15)1st Microprocessor ankle prosthesis - (3rd visit, day 29) 2nd Microprocessor ankle prosthesis
measure: Analysis of Changes in Energy consumption during walking
timeFrame: (1st visit, day 1)existing conventional prosthesis - (2nd visit, day 15)1st Microprocessor ankle prosthesis - (3rd visit, day 29) 2nd Microprocessor ankle prosthesis
measure: Analysis of Changes in 6 minute walk test
timeFrame: (1st visit, day 1)existing conventional prosthesis - (2nd visit, day 15)1st Microprocessor ankle prosthesis - (3rd visit, day 29) 2nd Microprocessor ankle prosthesis
measure: Analysis of Changes in Berg balance scale(BBS) scores
timeFrame: (1st visit, day 1)existing conventional prosthesis - (2nd visit, day 15)1st Microprocessor ankle prosthesis - (3rd visit, day 29) 2nd Microprocessor ankle prosthesis
measure: Analysis of Changes in Locomotor Capabilities Index (LCI) scores
timeFrame: (1st visit, day 1)existing conventional prosthesis - (2nd visit, day 15)1st Microprocessor ankle prosthesis - (3rd visit, day 29) 2nd Microprocessor ankle prosthesis
measure: Analysis of Changes in Korean-Prosthesis Evaluation Questionnaire (K-PEQ) scores
timeFrame: (1st visit, day 1)existing conventional prosthesis - (2nd visit, day 15)1st Microprocessor ankle prosthesis - (3rd visit, day 29) 2nd Microprocessor ankle prosthesis
Secondary outcomes:
Other outcomes:
Locations:
city: Seoul
country: Korea, Republic of
facility: Veterans Health Service Medical Center, Seoul, Korea
Study officials:
affiliation: Veterans Health Service Medical Center, Seoul, Korea
name: Hee Seung Yang, MD
role: PRINCIPAL_INVESTIGATOR
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