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Intraoperative monitoring for vagus nerve stimulation.

08:00 EDT 5th August 2019 | BioPortfolio

Summary of "Intraoperative monitoring for vagus nerve stimulation."

Vagus nerve stimulation (VNS) is a palliative treatment for patients with refractory epilepsy; however, the misplacement of electrodes may cause complications and, thus, needs to be avoided. We herein report an intraoperative monitoring technique to prevent the misplacement of electrodes. Endotracheal tube electrodes were inserted to record electromyographic activity (EMG) from the vocal cords and identify the vagus nerve. EMG electrodes were placed on the sternomastoid muscle, sternohyoid muscle, geniohyoid muscle, and trapezius muscle to record muscle activities innervated by the ansa cervicalis. The vagus nerve and ansa cervicalis were electrically stimulated during surgery and EMG of the vocal cords and muscles innervated by the ansa cervicalis was recorded. The threshold of vagus nerve activation ranged between 0.05 and 0.75 mA. The vagus nerve was successfully identified and differentiated from the nerve root of the ansa cervicalis using this technique. Intraoperative monitoring of the vagus nerve and ansa cervicalis is useful for safe and effective VNS.

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This article was published in the following journal.

Name: World neurosurgery
ISSN: 1878-8769
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Medical and Biotech [MESH] Definitions

An adjunctive treatment for PARTIAL EPILEPSY and refractory DEPRESSION that delivers electrical impulses to the brain via the VAGUS NERVE. A battery implanted under the skin supplies the energy.

Traumatic injuries to the VAGUS NERVE. Because the vagus nerve innervates multiple organs, injuries in the nerve fibers may result in any gastrointestinal organ dysfunction downstream of the injury site.

The electrical response evoked in a muscle or motor nerve by electrical or magnetic stimulation. Common methods of stimulation are by transcranial electrical and TRANSCRANIAL MAGNETIC STIMULATION. It is often used for monitoring during neurosurgery.

The 10th cranial nerve. The vagus is a mixed nerve which contains somatic afferents (from skin in back of the ear and the external auditory meatus), visceral afferents (from the pharynx, larynx, thorax, and abdomen), parasympathetic efferents (to the thorax and abdomen), and efferents to striated muscle (of the larynx and pharynx).

The inferior (caudal) ganglion of the vagus (10th cranial) nerve. The unipolar nodose ganglion cells are sensory cells with central projections to the medulla and peripheral processes traveling in various branches of the vagus nerve.

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