Recurrent Laryngeal Nerve Monitoring in Thyroid Surgery: Why It Matters
· NJM Medical Editorial Team
Voice preservation is a key quality outcome in thyroid surgery. Here is how intermittent and continuous nerve monitoring support surgeons.
The recurrent laryngeal nerve controls most of the muscles of the larynx. Injury during thyroid or parathyroid surgery can lead to hoarseness or, if both sides are affected, breathing difficulties. Protecting it is central to safe thyroid surgery.
Visual identification plus functional information
Surgeons have long identified the nerve visually. Neuromonitoring adds functional information: it confirms that the nerve conducts signals and warns when function begins to deteriorate. International and national surgical societies — including the German Society of General and Visceral Surgery — recommend the use of IONM in thyroid surgery.
Intermittent and continuous monitoring
- Intermittent IONM (I-IONM) — the surgeon stimulates the nerve or the vagus nerve with a probe at key steps and checks the EMG response recorded by electrodes on the endotracheal tube.
- Continuous IONM (C-IONM) — an electrode placed on the vagus nerve stimulates automatically, giving continuous feedback and early warning of traction injury.
Why it matters for staged surgery
If signal loss occurs on the first side, many surgeons will consider stopping and completing the second side later, to avoid the risk of bilateral nerve palsy. Reliable monitoring supports that decision.
Equipment
The inomed C2 Xplore supports thyroid surgery monitoring alongside ENT, spine and neurosurgery applications, while Dr. Langer Medical offers the AVALANCHE® PLUS neuromonitor. NJM Medical supplies these systems and helps teams set up electrodes, protocols and training.
This article is for general information for healthcare professionals and is not medical advice. Device selection and settings must always follow the manufacturer’s instructions for use and the treating clinician’s judgement.