title: [The effect of volatile anesthetics on EEG, auditory evoked potentials and somatosensory evoked potentials in dogs].
abstract: We compared the changes in EEG and evoked potentials among dogs anesthetized with halothane (H), isoflurane (I) or enflurane (E). The mean frequency of EEG with H was higher than that with I and E at 1 and 2 MAC. The amplitude of the 5th wave of auditory brain stem response with H was larger than that with I and E at 2 MAC. In terms of the Pa wave of auditory middle latency response, the amplitude with H was larger than that with E at 1 MAC, and the incidence of the wave with H was higher than that with I and E at 2 MAC. The amplitudes of N2 and N3 waves of somatosensory evoked potentials with H and I tended to decrease with increasing MAC, whereas those with E increased temporarily at 1 MAC. The inhibitory effects on EEG and evoked potentials were different among three volatile anesthetics.
authors.affiliation: Department of Anesthesia, Nishitaga National Hospital, Sendai.
authors.forename: K
authors.initials: K
authors.lastname: Ono
authors.forename: A
authors.initials: A
authors.lastname: Yasuda
authors.forename: S
authors.initials: S
authors.lastname: Matsukawa
authors.forename: M
authors.initials: M
authors.lastname: Akama
authors.forename: Y
authors.initials: Y
authors.lastname: Hashimoto
mesh_terms: D018685:Anesthetics, Inhalation / Q000494:pharmacology*; D000818:Animals; D004285:Dogs; D004305:Dose-Response Relationship, Drug; D004569:Electroencephalography / Q000187:drug effects*; D004737:Enflurane / Q000494:pharmacology; D005072:Evoked Potentials, Auditory / Q000187:drug effects*; D005073:Evoked Potentials, Somatosensory / Q000187:drug effects*; D006221:Halothane / Q000494:pharmacology; D007530:Isoflurane / Q000494:pharmacology
chemical_list: D018685:Anesthetics, Inhalation; D004737:Enflurane; D007530:Isoflurane; D006221:Halothane