intraoperative neurophysiological monitoring
Also written as: IONM
Real-time neurophysiological assessment during surgery to detect and prevent nervous system injury.
Full Definition
Intraoperative neurophysiological monitoring (IONM) involves the real-time assessment of nervous system function during surgical procedures that place neural structures at risk. This specialized field combines various neurophysiological techniques including EEG, EMG, somatosensory evoked potentials, motor evoked potentials, and auditory evoked potentials depending on the surgical procedure and anatomical structures at risk. IONM aims to detect neural compromise early enough to allow corrective action, thereby reducing the risk of postoperative neurological deficits. Common applications include spinal surgery, brain tumor resection, carotid endarterectomy, and cranial nerve procedures. The monitoring requires specialized equipment and trained neurophysiologists working closely with the surgical team.
Usage
Usage note: Commonly abbreviated as IONM; specify monitoring modalities used for different surgical procedures.
In Context
- "IONM was employed during the T12-L2 spinal fusion with continuous SEP and MEP monitoring." — Surgical procedure report
- "Intraoperative neurophysiological monitoring detected signal changes prompting surgical technique modification." — Operative consultation note