Dexmedetomidine for Laryngeal Mask Airway Insertion

Optimal Dose of Dexmedetomidine for Laryngeal Mask Airway Insertion During Propofol Induction

The investigators attempted to determine the optimal dose of dexmedetomidine required for the successful insertion of LMA during propofol induction without a neuromuscular blocking agent.

After a predetermined bolus dose of dexmedetomidine was injected over 2 min, anesthesia was induced with propofol 2.0 mg/kg. After confirming the loss of eyelash reflex and the bispectral index (BIS) score decreased below 60, the insertion of LMA was attempted.

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