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Related Experiment Videos

Nerve stimulation in thyroid surgery: is it really useful?

Thorbjorn J Loch-Wilkinson1, Peter L H Stalberg, Stan B Sidhu

  • 1University of Sydney, Endocrine Surgical Unit, Sydney, New South Wales, Australia.

ANZ Journal of Surgery
|May 15, 2007
PubMed
Summary
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Nerve stimulation with laryngeal palpation during thyroid surgery did not improve recurrent laryngeal nerve (RLN) identification or prevent injury. This technique offered no clear benefit for experienced surgeons in nerve assessment or functional testing.

Area of Science:

  • Otolaryngology
  • Surgical Neurology
  • Endocrinology

Background:

  • Recurrent laryngeal nerve (RLN) monitoring during thyroid surgery is debated, with some studies showing reduced injury rates and others no benefit.
  • Continuous monitoring is costly, while discontinuous nerve stimulation with laryngeal palpation is a simpler, less expensive alternative.

Purpose of the Study:

  • To evaluate the utility of nerve stimulation with laryngeal palpation for identifying and assessing the function of the RLN and external branch of the superior laryngeal nerve (EBSLN) during thyroidectomy.

Main Methods:

  • A prospective case series of 50 patients undergoing total thyroidectomy.
  • Preoperative and postoperative vocal cord/voice assessments, laryngeal examination at extubation, and dysphagia scoring.
  • Comparison of dysphagia scores with a control group (n=20) not using nerve stimulation.

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Main Results:

  • All recurrent laryngeal nerves (RLNs) were located without nerve stimulation; only one true RLN palsy occurred postoperatively (1%).
  • External branch of the superior laryngeal nerve (EBSLN) identification was not significantly aided by stimulation, with 13% remaining unidentified.
  • No significant difference in dysphagia scores between the study and control groups.

Conclusions:

  • Nerve stimulation did not enhance RLN anatomical dissection and was minimally useful for EBSLN identification.
  • Discontinuous nerve monitoring via stimulation during total thyroidectomy provides no clear advantage for experienced surgeons in nerve identification, functional assessment, or injury prevention.