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Evaluation of AK prostheses comparing conventional with adaptive knee control devices
Journal of Biomedical Engineering
|January 1, 1984
Summary
This study evaluated an experimental adaptive controlled knee prosthesis for amputees. Results show significant improvements in walking patterns, including reduced muscular effort and better symmetry, favoring the new prosthesis.
Area of Science:
- Biomechanics
- Prosthetics Engineering
- Gait Analysis
Background:
- Traditional prosthetic knees often present limitations in replicating natural gait dynamics.
- Amputee gait frequently involves compensatory movements and asymmetry, impacting mobility and energy expenditure.
Purpose of the Study:
- To objectively evaluate the performance of an experimental adaptive controlled knee prosthesis.
- To compare the gait parameters of amputees using the experimental prosthesis versus a normal prosthesis.
Main Methods:
- Utilized kinematic data, ground reaction forces, and time/distance parameters for objective gait assessment.
- Compared amputee walking patterns based on five key criteria against the experimental and a standard prosthesis.
Main Results:
- The adaptive controlled knee demonstrated significant improvements in key gait parameters.
- Observed a 50% improvement in hip moment peaks and a 37% reduction in hip muscular effort.
- Noted a reduced need for compensatory movements and enhanced gait symmetry with the experimental prosthesis.
Conclusions:
- The experimental adaptive controlled knee shows superior performance over conventional prostheses.
- This advanced prosthesis design offers substantial benefits for amputee mobility and walking efficiency.