Masui. The Japanese journal of anesthesiology
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Comparative Study
[Fentanyl shows different effects by administration routes on bispectral index during spinal anesthesia in patients undergoing cesarean section].
Spinal anesthesia using a local anesthetic with fentanyl has been reported to induce sedation. We previously reported that the bispectral index (BIS) value was significantly decreased by spinal anesthesia using only bupivacaine and fetanyl after cesarean delivery. In the present study, we studied the effect of different fentanyl administration routes on BIS values during spinal anesthesia for cesarean section. ⋯ The BIS value was significantly decreased only by intrathecal fentanyl for cesarean section.