What is IONM?
Intraoperative Neuromonitoring (IONM) is a continuous, real-time assessment of the nervous system's functional integrity throughout the course of a surgical procedure. By monitoring the electrical activity of the brain, spinal cord, and peripheral nerves from incision to close, IONM allows the surgical team to detect and respond to neurological changes before they result in permanent injury.
IONM is performed by a highly trained neurophysiology technologist working directly in the operating room, in continuous communication with a remotely supervising physician. Together, they provide an uninterrupted safety net for the patient across a wide range of spinal, neurological, vascular, and orthopedic procedures.
Modality Quick Reference
- SSEPs: Continuous assessment of ascending sensory pathways (dorsal column/medial lemniscal tract)
- TcMEPs: Assessment of the descending motor pathways (corticospinal tract)
- Free-run EMG: Real-time, continuous detection of nerve root irritation from mechanical contact or retraction
- Triggered EMG: Active nerve root identification and pedicle screw testing
Benefits of IONM
INCREASED PATIENT SAFETY
IONM has become the standard of care across spine, vascular, and neurological surgery. Continuous monitoring of sensory and motor pathways enables early detection of neural compromise, giving the surgical team the opportunity to intervene and prevent lasting deficits.
SHARED LIABILITY
SignaL IONM provides both technical and professional coverage. The on-site technologist and the remotely supervising physician each carry independent malpractice insurance, distributing liability appropriately and protecting all members of the surgical team.
ZERO COST TO THE PHYSICIAN
IONM is billed to the patient's insurance carrier on the patient's behalf, with our billing team handling all authorization and follow-up. Surgeons can offer their patients the added protection of continuous neuromonitoring without any impact to their own reimbursement or administrative burden.
COMPREHENSIVE DOCUMENTATION
Throughout every case, our technologist documents all clinically relevant events, waveform changes, and team communications in real time. This intraoperative record serves as an objective, timestamped account of neural integrity from baseline to close — valuable for clinical reference and, when needed, for evidentiary purposes in litigation.
BOARD CERTIFIED PHYSICIAN OVERSIGHT
Every SignaL IONM case is remotely supervised by a qualified oversight physician holding board certification or doctoral-level credentials in neurophysiological monitoring — including DABNM, MD, DO, and AuD. Oversight is active and continuous throughout every case, ensuring immediate expert interpretation is always in the loop.
IONM SERVICES
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CERVICAL
While brachial plexus injury due to traction or over tightening of the shoulders during cervical procedures isn't common it is important to guard against this possibility.
THORACIC & LUMBAR
While there are many similarities involving spine surgery at T1-L1 vs L2-S1 there is one critical factor to consider from a monitoring perspective.
CARDIO-VASCULAR
Cerebral perfusion monitoring, via an 8 channel EEG covering both cerebral hemispheres enables side to side comparison.
ORTHOPEDIC
Any incision can result in damage to the sensory nerves in the area of the incision. Significant nerve damage, which may cause loss of muscle function, can occur after hip replacement.
PAIN MANAGEMENT
The targeted nerve can be identified using an injectable, mono-polar stimulating needle that sends a small signal to the nerve. The signal is then recorded, utilizing the corresponding muscle group.
Why SignaL IONM?
Our clinicians bring years of hands-on experience across a full spectrum of surgical specialties, and they work with state-of-the-art monitoring equipment calibrated to deliver reliable, high-quality waveform data. Every case is staffed by a credentialed technologist who communicates in real time with a DABNM-certified supervising physician — ensuring that the data your surgical team depends on is interpreted with the highest level of expertise. We are responsive, straightforward to work with, and committed to the outcome that matters most: the safety of your patient.
