Soft-Actuated Cuff Electrodes with Minimal Contact for Bidirectional Peripheral Interfaces

Area of Science:

• Biomedical Engineering
• Neuroscience
• Materials Science

Background:

• Cuff electrodes are crucial for peripheral nerve monitoring and stimulation.
• Existing sutured electrodes pose risks of nerve damage due to high pressure and insecure contact.
• Achieving stable electrode-nerve contact is vital for maintaining electrical performance.

Purpose of the Study:

• To introduce a sutureless soft-actuated cuff electrode (SACE) system.
• To overcome the limitations of traditional sutured nerve electrodes.
• To demonstrate the efficacy and safety of SACE for long-term peripheral nerve interfacing.

Main Methods:

• Development of a sutureless cuff electrode that adopts a bent shape via fluid injection.
• Protrusion of electrode-bearing sections for controlled, soft nerve contact.
• In vivo implantation and evaluation of SACE performance in peripheral nerves.

Main Results:

• SACE successfully enveloped nerves and achieved secure electrode-nerve contact.
• Demonstrated successful recording and stimulation of peripheral nerves for up to 6 weeks.
• Preserved nerve integrity and blood flow, indicating minimal compressive force.

Conclusions:

• SACE provides a promising, less invasive approach for peripheral nerve interfacing.
• The device facilitates secure nerve contact, enabling reliable neural recording and stimulation.
• SACE represents a significant advancement toward bidirectional neuroprostheses.