An improved method of crafting a multi-electrode spiral cuff for the selective

Area of Science:

• Biomedical Engineering
• Neuroscience
• Materials Science

Background:

• Peripheral nerve stimulation is crucial for treating various neurological conditions.
• Existing methods often lack selectivity, leading to off-target effects.
• Advanced electrode technology is needed for precise control over nerve activation.

Purpose of the Study:

• To present an improved methodology for fabricating a multi-electrode spiral cuff.
• To analyze the structural and mechanical properties of interconnections.
• To evaluate the functional performance of the cuff for selective nerve fiber activation.

Main Methods:

• Fabrication of a silicone spiral cuff with 33 platinum electrodes.
• Scanning electron microscopy and nanohardness testing of spot welds.
• Destructive load tests for interconnection strength.
• Functional testing on isolated porcine vagus nerve.

Main Results:

• Scanning electron microscopy revealed good alloying and no welding defects.
• Destructive load tests showed breaking loads between 3.22 and 5 N.
• Nanohardness testing indicated site-specific variations in weld hardness.
• Functional tests demonstrated modulation of compound action potential based on stimulation intensity.

Conclusions:

• The developed multi-electrode spiral cuff offers a viable technology for selective peripheral nerve stimulation.
• The analyzed spot weld interconnections exhibit adequate mechanical properties for the application.
• The cuff's functionality in modulating nerve activity confirms its potential for targeted therapeutic interventions.