Journal
JOURNAL OF CLINICAL MONITORING AND COMPUTING
Volume 36, Issue 6, Pages 1585-1590Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10877-022-00880-8
Keywords
Laryngeal adductor reflex; Corticobulbar motor evoked potentials; Vagus; Schwannoma; Neuromonitoring
Categories
Ask authors/readers for more resources
Continuous monitoring of laryngeal adductor reflex (LAR) and corticobulbar motor evoked potentials (CoMEPs) during surgery is a reliable method for evaluating the functional status of the vagus nerve.
Purpose Schwannoma, a tumor originating from the peripheral nervous system, may arise from the vagus nerve, although it is not very often. Injury of the vagus nerve by surgical attempts may have consequences that will seriously affect the patient's quality of life. In recent years, continuous monitoring of the laryngeal adductor reflex (LAR) has become a promising methodology for evaluating vagus nerve function intraoperatively. We refer to our experience changing our surgical strategy due to concurrent deterioration in LAR and CoMEPs intraoperatively. We also provide a literature review and summarize the current knowledge of this technique. Methods The LAR was elicited and recorded by an electromyographic endotracheal tube in a 36-year-old man diagnosed with vagal nerve schwannoma. Subdermal needle electrodes were placed in both cricothyroid (CTHY) muscles for corticobulbar motor evoked potentials (CoMEPs) recording. Results Recordings of ipsilateral LAR and CTHY CoMEPs were obtained despite preoperative ipsilateral cord vocalis weakness. The surgical strategy was altered after the simultaneous decrease of CTHY CoMEPs and LAR amplitudes, and the surgery was completed with subtotal resection. No additional neurological deficit was observed in the patient except dysphonia, which resolved within a few weeks after the surgery. Conclusions We conclude that LAR with vagal nerve CoMEPs are two complementary methods and provide reliable information about the functional status of the vagus nerve during surgery.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available