The effects of nitrous oxide on the auditory evoked potential index during sevoflurane anaesthesia.
case_series · Level IV
Where this comes from
- Record sourced from PubMed, PMID 12133083.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
We have studied the effects of nitrous oxide on the auditory evoked response index (AAI-index) derived from the A-line monitoring device during sevoflurane anaesthesia in 21 patients undergoing minor ambulatory surgery. During sevoflurane anaesthesia with an AAI-index < 30, the addition or withdrawal of nitrous oxide in a concentration of 66% end tidal did not show any linear dose dependent change in AAI-index . However, comparing nitrous oxide > 40% to nitrous oxide < 10% end tidal concentration the AAI-index did decrease, p < 0.05. The AAI-index is either non-linear at deeper anaesthetic levels or is insensitive to the anaesthetic effects of nitrous oxide in terms of MAC-multiples.
Medical subject headings
- Anesthetics, Combined
- Anesthetics, Inhalation
- Evoked Potentials, Auditory
- Methyl Ethers
- Nitrous Oxide