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Hollow Microneedle-based Sensor for Multiplexed Transdermal Electrochemical Sensing
Published on: June 1, 2012
In vivo interactions between tungsten microneedles and peripheral nerves
Pier Nicola Sergi1, Winnie Jensen, Silvestro Micera
1BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa, Italy. p.sergi@sssup.it
Medical Engineering & Physics
|October 18, 2011
Summary
Tungsten microneedles are used for neural electrode insertion. This study models microneedle-nerve interactions, quantifying biomechanical properties to enhance insertion techniques and robot-assisted procedures.
Area of Science:
- Biomedical Engineering
- Neural Engineering
- Biomechanics
Background:
- Tungsten microneedles are utilized for neural electrode insertion into peripheral nerves.
- The biomechanics of microneedle insertion into living nerves are not well understood.
Purpose of the Study:
- To model the biomechanical interactions between tungsten microneedles and living peripheral nerves.
- To quantify key mechanical properties during microneedle insertion.
Main Methods:
- Developed a mathematical framework to model epineurium compression and microneedle shaft penetration.
- Quantified instantaneous Young's modulus, compression force, work of piercing, puncturing pressure, and dynamic friction coefficient through acute experiments.
Main Results:
- Characterized the biomechanical forces and material properties involved in tungsten microneedle insertion.
- Provided quantitative data on nerve-microneedle interactions under simulated implantation conditions.
Conclusions:
- Improved understanding of microneedle-nerve interactions can optimize insertion techniques.
- This knowledge is crucial for developing advanced robot-assisted peripheral nerve insertion procedures.
