intraoperative nerve monitoring
Real-time electrophysiological monitoring of laryngeal nerve function during thyroid and parathyroid surgery to prevent voice complications.
Full Definition
Intraoperative nerve monitoring (IONM) involves continuous electrophysiological assessment of recurrent and superior laryngeal nerve function during thyroid and parathyroid surgery. The system uses specialized endotracheal tubes with surface electrodes that detect muscle responses when nerves are stimulated. This technology helps surgeons identify nerve location, assess nerve integrity in real-time, and modify surgical technique to prevent nerve injury. IONM has become standard practice in many centers, particularly for revision surgery, substernal goiters, or cases with increased risk of nerve injury. The technology requires proper setup, interpretation of signals, and understanding of potential false-positive and false-negative results.
Usage
Usage note: Commonly abbreviated as IONM; specify which nerves are being monitored.
In Context
- "Intraoperative nerve monitoring demonstrated intact bilateral recurrent laryngeal nerve function throughout the procedure." — operative note
- "Loss of signal on intraoperative nerve monitoring prompted immediate exploration and identification of nerve traction injury." — surgical complication report