title: Improvement of intraoperative somatosensory evoked potentials by etomidate.
mesh_terms: D015760:Alfentanil; D000771:Anesthesia, Intravenous; D005045:Etomidate / Q000494:pharmacology*; D005073:Evoked Potentials, Somatosensory / Q000187:drug effects*; D005283:Fentanyl / Q000031:analogs & derivatives*; D006801:Humans; D007432:Intraoperative Period; D008297:Male; D008874:Midazolam; D008875:Middle Aged; D008991:Monitoring, Physiologic; D013117:Spinal Cord Compression / Q000601:surgery
chemical_list: D015760:Alfentanil; D008874:Midazolam; D005283:Fentanyl; D005045:Etomidate