Injection techniques for auricular nerve blocks in the rabbit cadaver.

Area of Science:

• Anatomy
• Surgical Techniques
• Medical Imaging

Background:

• Accurate identification and staining of auricular nerves are crucial for surgical procedures.
• Cadaveric studies provide a valuable platform for developing and refining anatomical dissection and injection techniques.

Purpose of the Study:

• To identify anatomical landmarks for precise localization of auricular nerves in rabbit cadavers.
• To determine the optimal methodology and methylene blue dye volume for effective auricular nerve staining.

Main Methods:

• A prospective, randomized, cadaveric study involving 26 rabbit cadavers.
• Anatomical dissections were performed to identify sensory auricular nerves and optimize injection techniques.
• Evaluated single and dual injection techniques with varying methylene blue dye volumes (0.1 mL/kg and 0.075 mL/kg) for specific auricular nerves.

Main Results:

• Successful staining of the greater auricular nerve in 88.9% of injections.
• The angled needle approach for the auriculotemporal nerve achieved an 80% staining success rate, compared to 58.3% with the perpendicular approach.
• Mandibular nerve staining occurred in 7 instances during auriculotemporal nerve injections, with no significant difference between techniques.

Conclusions:

• Anatomical landmarks and the described injection techniques enable successful location and staining of auricular nerves in rabbit cadavers.
• The findings provide a foundation for further research into nerve-staining methodologies in anatomical studies.