SOMATOSENSORY-EVOKED POTENTIALS AFTER IOHEXOL MYELOGRAPHY

Tibial nerve and S1 dermatome somatosensory evoked potentials (SSEPs) were recorded before and after iohexol lumbar myelography in order to evaluate possible neurotoxic effects of this contrast medium. No signi ficant change in SSEP latencies nor amplitudes was noted after iohexol myelography, supporting the low neurotoxic profile of this contrast a gent. Results were compared to those of a control group of patients be fore and after lumbar puncture (LP), without injection of contrast age nt. In this group also no significant change in SSEP components was fo und, indicating that a preceding LP does not affect this electrophysio logical examination.