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Intraoperative Neurophysiological Monitoring (IONM)

Led by Dr Eva Ritzl, the Johns Hopkins Intraoperative Neurophysiological Monitoring unit is a multi-disciplinary specialty program that provides intraoperative monitoring procedures to our surgeons.

What is intraoperative neurophysiological monitoring?

Intraoperative neurophysiological monitoring (IONM) describes a group of procedures used during surgery to monitor neural pathways during high-risk neurosurgical, orthopedic, peripheral nerve, and vascular surgeries. These procedures assist surgeons in preventing damage and preserving functionality of the nervous system.

There are two types of IONM: techniques used to identify impending damage to the nervous system, and techniques used to map the structures of the nervous system.


#1 in Neurology and Neurosurgery in the U.S. for Four Consecutive Years

US News and World Report Best HospitalsThe Johns Hopkins Hospital ranked #1 in the nation in 2013 and is the only hospital in history to be ranked #1 for 21 years in a row by U.S. News & World Report.


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