Traction injury of the recurrent laryngeal nerve: Results of continuous intraoperative neuromonitoring in a swine model

Hye Yoon Lee, Young Geon Cho, Ji Young You, Byoung-Ho Choi, Joon Yub Kim, Che Wei Wu, Feng Yu Chiang, Hoon Yub Kim

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Background: Recurrent laryngeal nerve (RLN) palsy is the most serious complication after thyroidectomy. However, little is known about the degree of traction injury that causes loss of signal. The purpose of this study was to evaluate traction injuries in the swine RLN using continuous intraoperative neuromonitoring (IONM) and determine the traction power that results in loss of signal. Methods: Thirteen swine underwent traction injury to the RLNs with continuous IONM, and stress-strain curves were determined for 8 nerves using the universal material testing machine in an ex vivo model. Results: Traction injury at a mean power of 2.83 MPa caused loss of signal. The mean physiologic limit strain and tensile strength of the swine RLNs were found to be 15.0% and 4.9 MPa, respectively. Histological analysis showed no abnormal structural findings. Conclusion: Traction injury of swine RLNs causes loss of signal at a power of 2.83 MPa. However, all injured nerves recovered within 7 days with no observed structural damage.

Original languageEnglish
JournalHead and Neck
DOIs
Publication statusAccepted/In press - 2015

Keywords

  • Intraoperative neuromonitoring
  • Recurrent laryngeal nerve
  • Swine model
  • Thyroidectomy
  • Traction injury

ASJC Scopus subject areas

  • Otorhinolaryngology

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