mod7 IONM Spinal SSEP Modality

IONM for Spinal Procedures

Somatosensory Evoked Potentials in IONM of Spinal Procedures

Multimodality Monitoring for Spinal Procedures

Sensory functions are monitored during high risk procedures utilizing somatosensory evoked potentials (SSEP) modality, specifically the ascending spinal pathways (dorsal column).

SSEP-Upper & Lower SEPTCeMEPCMAP & D-WavesEMG (Electromyography)T-EMG Pedicle Screw Stimulation SI Screw Stimulation

In IONM, SSEPs are beneficial to monitor the blood flow to the brain, brainstem, spinal cord, and peripheral nerve system.

SSEP

used to monitor the integrity of a pts' ascending sensory spinal pathways (dorsal column)

SSEPs: Alarm Criteria

• If there is more than a 10% increase in latency or 50% or more decrease in cortical amplitudeit should be considered as alarm criteria and the surgeon should be informed immediately. • There is no published data confirming this criterion, but it is being used for many decadesnow. • There are a number of factors considered before alarming the surgeon including: • variability of the responses, • effect of anesthesia, • any pre-existing neurologic conditions, • rate of change in signals and, • related surgical events.(source: Dr. Faisal Jahangiri) 2023

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