[End-tidal sevoflurane concentrations for laryngeal mask airway insertion and tracheal intubation in children].
BACKGROUND
Sevoflurane, a new inhalation anesthetic agent characterized by a low blood-gas partition coefficient and nonpungent odor, appears suitable as an induction agent for children. This study was conducted to determine the sevoflurane concentration required for tracheal intubation and insertion laryngeal mask in children.


METHODS
Thirty patients, aged 3-7 years, scheduled for surgery during general anesthesia were randomly assigned into two groups: Group I (n=15)--tracheal intubation (IT), Group II (n=15)--laryngeal mask insertion (LMI). After the predetermined end-tidal concentration of the sevoflurane, tracheal intubation or laryngeal mask insertion was attempted without neuromuscular relaxants.


RESULTS
Sevoflurane MAC-LMI was 1.53 +/- 0.23%, sevoflurane MAC-TI was 2.35 +/- 0.31%, significantly greater than MAC-LMI.


CONCLUSIONS
Laryngeal mask insertion can be performed at a lesser sevoflurane concentration than that required for tracheal intubation.
Grabowska-Gaweł
Anna
A
Zakład Pielegniarstwa w Intensywnej Opiece Medycznej Akademii Medycznej, Bydgoszczy. kgawelort@wp.pl
D000769:Anesthesia, Inhalation; D018685:Anesthetics, Inhalation / Q000008:administration & dosage*; D002648:Child; D002675:Child, Preschool; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D007442:Intubation, Intratracheal / Q000379:methods*; D017214:Laryngeal Masks; D008297:Male; D008738:Methyl Ethers / Q000008:administration & dosage*; D011650:Pulmonary Alveoli / Q000378:metabolism; D012044:Regression Analysis; D000077149:Sevoflurane; D013990:Tidal Volume
D018685:Anesthetics, Inhalation; D008738:Methyl Ethers; D000077149:Sevoflurane