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Related Experiment Video

Updated: Apr 15, 2026

Identification and Protection of the Recurrent Laryngeal Nerve during Transoral Robotic Thyroidectomy
05:25

Identification and Protection of the Recurrent Laryngeal Nerve during Transoral Robotic Thyroidectomy

Published on: October 24, 2025

893

Stressing the recurrent laryngeal nerve during thyroidectomy.

Jonathan W Serpell1, James C Lee1,2, Wing K Chiu3

  • 1Monash University Endocrine Surgery Unit, Alfred Hospital, Melbourne, Victoria, Australia.

ANZ Journal of Surgery
|March 25, 2015
PubMed
Summary

The right recurrent laryngeal nerve (RLN) has a higher palsy rate after thyroidectomy due to increased tension and lower stiffness compared to the left RLN. This study investigated nerve differences to explain varying palsy rates.

Keywords:
palsy, recurrent laryngeal nervestressstretchthyroidectomy

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Area of Science:

  • Endocrine Surgery
  • Neurosurgery
  • Surgical Anatomy

Background:

  • Recurrent laryngeal nerve (RLN) palsy rates after thyroidectomy show side differences, but underlying causes are poorly understood.
  • Investigating these disparities is crucial for improving surgical outcomes and patient safety.

Purpose of the Study:

  • To compare left versus right recurrent laryngeal nerve (RLN) palsy rates in total thyroidectomy.
  • To explore potential biomechanical differences, specifically nerve stiffness and tension, contributing to observed palsy rate variations.

Main Methods:

  • Analysis of 1926 total thyroidectomy cases from 2007-2013 to determine RLN palsy rates.
  • Experimental determination of porcine RLN stiffness and computational stress modeling to estimate intraoperative tension.

Main Results:

  • The right RLN exhibited a significantly higher palsy rate (1.8%) than the left RLN (0.9%) (P=0.025).
  • The left porcine RLN was 22% stiffer than the right RLN (P=0.004).
  • Stress modeling indicated the right RLN experiences twice the tension of the left RLN during thyroid lobe rotation.

Conclusions:

  • The combined factors of lower stiffness and higher intraoperative tension in the right RLN likely contribute to its increased palsy rate.
  • Understanding these biomechanical differences can inform surgical techniques to minimize right RLN injury during thyroidectomy.