Neuromonitoring of the external branch of the superior laryngeal nerve during minimally invasive thyroid surgery under local anesthesia: A prospective study of 10 patients
✍ Scribed by William B. Inabnet; Thomas Murry; Shamly Dhiman; Jonathan Aviv; Jean-Christophe Lifante
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 79 KB
- Volume
- 119
- Category
- Article
- ISSN
- 0023-852X
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✦ Synopsis
Abstract
Objectives/Hypothesis:
Avoiding alterations of the voice is a challenge in thyroid surgery. Identification and preservation of the external branch of the superior laryngeal nerve (EBSLN) is paramount for normal vocal function preservation after thyroidectomy. Conventional nerve monitoring requires a general anesthesia and placement of a special endotracheal tube equipped with electrodes to evoke the laryngeal nerves. This study aims to assess feasibility and efficacy of a novel technique of neuromonitoring of the EBSLN under local anesthesia during minimally invasive thyroidectomy.
Study Design; Prospective Study:
This study is a prospective trial to evaluate the efficacy of nerve monitoring of the EBSLN during minimally invasive thyroidectomy under local anesthesia. Patient self‐assessment of changes in perceived voice severity prior to and 3 weeks after surgery was assessed with the Voice Handicap Index‐10 (VHI‐10).
Results:
Thyroidectomy was successfully completed under local anesthesia in all cases. The recurrent laryngeal nerve(s) was identified and preserved in each patient as demonstrated by normal perioperative transnasal flexible laryngoscopy. A total of 15 EBSLNs were at risk, but only 8 EBSLNs (53%) were definitively identified. Neuromonitoring demonstrated preservation of the EBSLN in 100% of cases. The analysis of the results of the VHI‐10 questionnaire before and 3 weeks after surgery indicated no significant change in patients' perception of voice severity.
Conclusion:
Monitoring of the EBSLN during thyroidectomy under local anesthesia is a feasible alternative to conventional nerve monitoring under general anesthesia. This technique may be useful for the preservation of voice quality during a minimally invasive thyroidectomy under local anesthesia. Laryngoscope, 2009