title: Plasma beta-endorphin levels during laryngoscopy and tracheal intubation with and without using fentanyl preloading.
mesh_terms: D000328:Adult; D004723:Endorphins / Q000097:blood*; D005260:Female; D005283:Fentanyl / Q000494:pharmacology*; D006439:Hemodynamics / Q000187:drug effects; D006801:Humans; D007442:Intubation, Intratracheal; D007828:Laryngoscopy; D008297:Male; D008875:Middle Aged; D001615:beta-Endorphin
chemical_list: D004723:Endorphins; D001615:beta-Endorphin; D005283:Fentanyl