Design and Development of a Powered Myoelectric Elbow Orthosis for Neuromuscular Injuries

Area of Science:

• Biomedical Engineering
• Rehabilitation Technology
• Orthotics and Prosthetics

Background:

• Neuromuscular injuries present significant rehabilitation challenges.
• Existing powered orthotic devices are often criticized for being bulky and heavy.
• There is a need for improved assistive devices to support limb movement during recovery.

Purpose of the Study:

• To develop and evaluate a novel powered myoelectric elbow orthosis.
• To overcome the design limitations of current commercially available devices.
• To assess the impact of the new orthosis on upper extremity functionality.

Main Methods:

• The orthosis features a solenoid brake, Bowden cable mechanism, and extension limiter.
• Controller and battery are housed in a backpack to minimize weight on the affected limb.
• A subject with a history of gracilis free functioning muscle transfer surgery was fitted and assessed.

Main Results:

• Significant improvement in elbow flexion range of motion by 40 degrees.
• Reduction in compensatory shoulder movements by 50 percent.
• Enabled previously impossible daily tasks, such as carrying weighted objects.

Conclusions:

• The novel powered myoelectric elbow orthosis effectively addresses limitations of existing devices.
• The device offers improved quality of life for individuals with neuromuscular conditions.
• Future research will focus on expanding patient applications and control strategies.