Vagus Nerve Stimulation in the Carotid Triangle: An Effective Method for Monitoring the Recurrent Laryngeal Nerve in Thyroid and Parathyroid Surgery

Alfredo Traba, Angela de Abreu, Clara Nevado, Hipolito Duran, Antonio Gil, Maria Perez Seoane,Laura Lopez-Gonzalez,Miguel A. Ortega,Melchor alvarez-Mon, Pedro Martin, Juan San Roman, Raul Diaz-Pedrero,Gregorio Scerrino

JOURNAL OF CLINICAL MEDICINE(2024)

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摘要
Objective: Our objective is the description of the technique of vagus nerve stimulation in carotid triangle in order to monitor the recurrent laryngeal nerve (RLN) during thyroid and parathyroid surgery. Methods: We stimulated the vagus nerve in the carotid triangle during 150 thyroid or parathyroid surgeries using a monopolar electromyography electrode inserted under the mastoid process towards the jugular foramen as a cathode, and using another subdermal electrode in the mastoid as an anode. Another complementary method of vagus stimulation was achieved with a pair of subdermal electrodes, placing the cathode at the mandibular angle and the anode at the mastoid. Results: In all patients, compound muscle action potential (CMAP) was recorded in the vocal cords with both stimulation techniques, allowing semi-continuous monitoring to be carried out. Intraoperative lesions were detected in 16 of the cases; 9 of them were transient with CMAP recovery achieved when modifying surgical maneuvers. Conclusions: Vagus nerve stimulation in the carotid triangle is a reliable technique for monitoring the RLN in thyroid surgery. Vagus nerve stimulation in the carotid triangle is effective and safe for RLN monitoring, and it is a clear alternative to direct continuous stimulation of the nerve that by contrast requires its dissection in the carotid sheath.
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vagus nerve stimulation in carotid triangle,recurrent laryngeal nerve monitoring,thyroid and parathyroid surgery
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