Conclusions
HYPERTENSION
While propofol intravenous anesthesia was supplemented by low-concentration volatile anesthetics during spinal surgery, the use of low-dose Dex had no effect on the monitoring of SEPs and tcMEPs. High-dose Dex had no effect on SEPs monitoring, but it may make tcMEPs signals more likely to be falsely positive and cause unpleasant reactions (hypertension).