Intubating Conditions During Propofol-remifentanil Anesthesia With Topical Lidocaine

Effect of Tracheal Lidocaine on Intubating Conditions During Propofol-remifentanil TCI Without Neuromuscular Blockade

When not using neuromuscular blocking agent, even at optimal dosage, target-controlled infusion (TCI) of propofol and remifentanil occasionally produce unsatisfactory intubating conditions. Therefore, the investigators evaluated that the effect of tracheal lidocaine on the intubating conditions for tracheal intubation during anesthesia induction of propofol and remifentanil TCI without neuromuscular blocking agent in day-case anesthesia.

Anesthesia was induced with propofol-remifentanil TCI with the effect-site concentration of 5μg/ml and 5ng/ml, respectively. After TCI, 3 ml of normal saline or 3 ml of 4% lidocaine was instilled to larynx and trachea, following intubation was performed.

Inclusion Criteria:

• ASA I, II patients undergoing general anesthesia for reduction of nasal bone fracture

Exclusion Criteria:

• bronchial asthma,
• COPD,
• hypertension,
• anticipated difficult airway