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Motor evoked potentials during interventional neuroradiology
J Zentner1, M Schumacher, S Bien
1Department of Neurosurgery, Medical School, University of Freiburg, Federal Republik of Germany.
Neuroradiology
|January 1, 1988
Summary
Monitoring motor evoked potentials (MEP) during interventional neuroradiology detects neurological deficits early. This sensitive method aids in preventing patient complications during procedures.
Area of Science:
- Neuroscience
- Interventional Neuroradiology
Background:
- Transcranial electrical cortex stimulation is used to elicit motor evoked potentials (MEP).
- Interventional neuroradiology procedures, including embolization, carry risks of neurological deficits.
Observation:
- MEP were monitored in 4 patients during angiographic examinations and embolization procedures.
- Changes in MEP amplitudes were observed in all patients during these interventions.
Findings:
- Temporary MEP amplitude decrease in two patients did not result in postoperative deficits.
- One patient experienced hemiparesis associated with incomplete MEP amplitude recovery post-angiography.
- A delayed MEP reduction in another patient led to early detection of revascularization, requiring further embolization.
Implications:
- MEP monitoring is a sensitive tool for early detection of neurological deficits during interventional neuroradiology.
- MEP monitoring offers advantages over conventional somatosensory evoked potential (SEP) monitoring.
- Magnetic stimulation may be considered to reduce patient discomfort associated with electrical stimulation.