Design of a Passive, Variable Stiffness Exoskeleton for Triceps Deficiency Mitigation.

Area of Science:

• Biomedical Engineering
• Rehabilitation Technology
• Assistive Devices

Background:

• Cervical spinal cord injuries (SCI) frequently cause triceps weakness, limiting daily activities and high-demand tasks like sit-skiing.
• Existing powered exoskeletons are often impractical due to bulky components and power requirements.
• Passive upper extremity exoskeletons have not yet provided sufficient assistance for activities such as sit-skiing.

Purpose of the Study:

• To design a passively actuated exoskeletal arm brace to assist individuals with SCI.
• To provide adjustable strength modes for gravity compensation and weight-bearing activities.
• To develop an affordable, lightweight, and modular device for personalized patient needs.

Main Methods:

• Development of a novel passively actuated mechanism for an upper extremity exoskeleton.
• Implementation of two adjustable-strength modes: low-level gravity compensation and higher-level weight-bearing assistance.
• Focus on lightweight, modular design principles for patient customization.

Main Results:

• A functional passively actuated exoskeletal arm brace was designed and developed.
• The device offers adjustable strength capabilities for varied user needs.
• The design prioritizes affordability, light weight, and modularity.

Conclusions:

• The developed passive exoskeletal arm brace shows promise for assisting individuals with SCI in performing daily and demanding tasks.
• This innovation offers a practical and customizable solution compared to existing powered devices.
• Further research and development can lead to improved independence and quality of life for SCI patients.