Implanted functional electrical stimulation system for mobility in paraplegia: a follow-up case report

Area of Science:

• Neuroscience
• Biomedical Engineering
• Rehabilitation Medicine

Background:

• Paraplegia presents significant mobility challenges.
• Functional Electrical Stimulation (FES) offers a potential solution for restoring function.

Observation:

• A 16-channel implanted FES system was used by an individual with T10 paraplegia for over a year.
• The system utilizes radio frequency controlled receiver-stimulators and a network of epimysial and intramuscular electrodes.
• The subject used a walker for support, enabling standing and walking.
• Limitations included arm fatigue, suboptimal hip extension, and quadriceps muscle fatigue.

Findings:

• The individual could stand for 8 minutes and walk 20 meters.
• Metabolic energy requirements were within aerobic limits.
• All but one electrode remained functional after one year.
• No adverse physiological effects were observed.

Implications:

• The 16-channel FES system demonstrates potential for enhancing exercise and mobility in individuals with paraplegia.
• Further improvements in muscle response via surgical techniques could increase FES system viability.
• Reported health benefits include increased energy and overall fitness.