End-tidal desflurane concentration for tracheal extubation in adults

Area of Science:

• Anesthesiology
• Pharmacology

Background:

• Desflurane is a volatile anesthetic agent used for maintaining anesthesia.
• Determining optimal anesthetic concentrations for emergence is crucial for patient recovery and surgical outcomes.

Purpose of the Study:

• To ascertain the end-tidal desflurane concentration necessary for successful tracheal extubation in adult patients.
• To establish a target concentration for smooth emergence from desflurane anesthesia.

Main Methods:

• Eighteen adult patients undergoing elective ambulatory surgery were included.
• Anesthesia was maintained with desflurane, remifentanil, and neuromuscular blockade monitored by train-of-four (TOF).
• Dixon's up-and-down method was employed to determine the desflurane concentration for extubation.

Main Results:

• The end-tidal desflurane concentration for successful extubation in 50% of adults was found to be 3.17±0.18%.
• Smooth extubation was defined by the absence of coughing, purposeful movements, and airway reflexes.

Conclusions:

• Tracheal extubation may be safely achieved at a minimum alveolar concentration (MAC) of 0.62 for desflurane.
• These findings provide valuable data for optimizing anesthetic management and patient recovery.