Instrumented forceps for measurement of nerve compression forces

Area of Science:

• Neuroscience
• Biomedical Engineering
• Surgical Research

Background:

• Nerve injury models in rats commonly use compression (crushing) to study nerve degeneration and regeneration.
• Existing methods often lack precise control over applied compression forces, leading to significant variability in experimental results.
• Accurate quantification of compression is crucial for reproducible nerve injury studies.

Purpose of the Study:

• To develop and validate a method for inducing known and controlled nerve compression in rats.
• To improve the precision and reproducibility of nerve injury models used in degeneration and regeneration research.
• To establish a reliable experimental setup for studying the effects of specific compression forces on peripheral nerves.

Main Methods:

• Utilized calibrated Mosquito forceps and modified, strain-gauge-instrumented dressing forceps to apply nerve compression.
• Calibrated Mosquito forceps to determine tip load based on clamping position.
• Instrumented dressing forceps with strain gauges and calibrated to directly measure applied tip force, using forces of approximately 40N and 20N respectively in 75 male Wistar rats.

Main Results:

• Successfully applied controlled compression forces (approx. 40N and 20N) to induce nerve injury in rats.
• Developed a method to precisely measure and control the forces applied during nerve compression.
• Established a foundation for more consistent and reliable studies on nerve degeneration and regeneration.

Conclusions:

• Calibrated forceps provide a reliable method for inducing controlled nerve compression in animal models.
• This technique minimizes variability, enhancing the accuracy of studies on nerve degeneration and regeneration.
• The developed methodology offers a significant advancement for preclinical nerve injury research.