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Intraoperative neuromonitoring (IONM) of recurrent laryngeal nerve (RLN) function is commonly performed for patients undergoing thyroidectomy or parathyroidectomy.1 Although its routine use remains controversial, IONM has demonstrated utility in selected situations, such as cases of reoperation.2,3 Intraoperative neuromonitoring using specific stimulation of the more proximal vagus nerve is thought to provide more complete anatomic analysis of RLN integrity than that of isolated distal segments of the RLN alone.4 However, current vagal IONM methods typically entail placing an electrode around the vagus for continuous electrical stimulation. This requires additional dissection of, and fixation to, the nerve, which, in theory, adds time and increases risk.5 We hypothesize that a novel method of transcutaneous intraoperative vagal stimulation (TIVS) in the upper neck is less invasive and is feasible in thyroidectomy and parathyroidectomy.
Suh I, Yingling C, Randolph GW, Duh Q. A Novel Method of Neuromonitoring in Thyroidectomy and Parathyroidectomy Using Transcutaneous Intraoperative Vagal Stimulation. JAMA Surg. 2016;151(3):290-292. doi:10.1001/jamasurg.2015.3249