Article Text
Original Article
Effects of Etidocaine Administered Epidurally on Changes in Somatosensory Evoked Potentials after Dermatomal Stimulation
Abstract
The effect of lumbar epidural anesthesia with similar volumes (approximately 20 ml) of 1% and 1.5% etidocaine on early (<0.5 seconds) somatosensory evoked potentials (SEPs) to electrical stimulation of the S1, L1 and T10 dermatomes was examined in two groups of ten patients in a randomized, double-blind study. Level of analgesia to pinprick was T7.7 ± 0.9 in the 1% group and T6.6 ± 0.6 in the 1.5% group and all patients had total motor block. Despite similar analgesia to pinprick, SEP amplitude was more reduced in the 1.5% group, in which SEPs were abolished in all patients at the L1 level.
- Anesthetic techniques
- epidural etidocaine
- brain evoked potentials