Dosing Study of Remifentanil for Smooth Removal of the Laryngeal Mask Airway (LMA)

Effect-site Concentration of Remifentanil for Smooth Removal of the LMA From Propofol Anesthesia

The investigators attempted to determine the optimal effect-site concentration of remifentanil for smooth removal of the LMA from propofol anesthesia.

At the end of the surgery, propofol infusion was stopped and remifentanil was titrated to predetermined (initial concentration 1.0 ng/ml for the first patient). LMA removal was performed when the patients opened their eyes and spontaneous respiration and adequate tidal volume and ventilatory frequency were confirmed.

Inclusion Criteria:

• ASA I-II patients undergoing general anesthesia for short elective surgery (<1 hr)

Exclusion Criteria:

• G-E reflux
• obesity (BMI>30)
• anticipated difficult airway