Minimum Alveolar Concentration Of Sevoflurane For Insertion Of Laryngeal Mask Airway In Han And Uygur Patients From Department Of Gynecology By Laparoscopic Operation

Objective:The purpose of this essay is to discuss minimum alveolar concentration of sevoflurane when insertion of laryngeal mask airway in Han and Uygur patients from department of gynecology by laparoscopic operation. Methods:American Society of Anesthesiologists(ASA) Ⅰ～Ⅰ selected patients aged from20to50with Han and Uygur each30cases of Ovarian cyst surgery by laparoscpic operation. By adopting sequential test and sevoflurane with the first patient with the concentration of2.0%and grade differential of0.2%. Patients underwent elective surgery under general anesthesia induced by inhalation of8%sevoflurane in oxygen. After loss of eyelash reflex, the designated end-tidal concentration of sevoflurane remained stable for at least10min, and then the laryngeal mask airway was inserted. Each target concentration at the time of insertion was predetermined by the Dixon up-and-down method (with0.2%as a step size) starting at2.0%end-tidal concentration of sevoflurane. Successful insertion was defined as excellent inserting condition. Results:The mean minimum alveolar concentration of sevoflurane to achieve successful laryngeal mask airway insertion in50%of Han and Uygur patients was1.94%and2.06%, while EC95is2.36%and2.65%. Conclusion:Laryngeal mask airway insertion can be safely accomplished in EC95of Han and Uygur patients from department of gynecology by laparoscopic operation at2.36%and2.65%end-tidal concentrations of sevoflurane.