Differences in knee flexion between the Genium and C-Leg microprocessor knees while walking on level ground and ramps

Area of Science:

• Biomedical Engineering
• Rehabilitation Science
• Prosthetics and Orthotics

Background:

• Microprocessor knees enhance gait and function in transfemoral amputees.
• The Genium prosthetic knee features advanced sensors for improved gait control.
• It aims to reduce impairment by increasing stance phase flexion and adapting to terrain.

Purpose of the Study:

• Compare knee flexion angles between Genium, C-Leg, and non-amputee controls.
• Evaluate the impact of these prostheses on gait and user impairment.
• Determine functional differences between the Genium and C-Leg knees.

Main Methods:

• Randomized experimental crossover study with 25 transfemoral amputees.
• Comparison between Genium and C-Leg microprocessor knees.
• Observational sample of 5 non-amputee controls.
• 3D motion tracking for gait analysis at various speeds and inclines.

Main Results:

• Genium use showed significantly greater peak knee flexion in swing (5°) and stance (2°) phases versus C-Leg.
• High inter-subject variability was observed.
• Significant differences in knee flexion angles persisted between Genium users and controls.

Conclusions:

• The Genium knee enhances swing and stance phase flexion, potentially lowering impairment levels.
• Functional differences between Genium and C-Leg are demonstrated.
• This research assists prosthetists in selecting the Genium for patient benefit.