The EC50 of Remifentanil Blunting Hemodynamic Response to Double Lumen Tube Intubation

The Effect Site Concentration of Remifentanil Blunting Hemodynamic Responses to Tracheal Intubation: Single Versus Double Lumen Tube

The purpose of this study is to evaluate the effect site concentration of remifentanil blunting hemodynamic changes to tracheal intubation of single or double lumen tubes.

Inclusion Criteria:

• Patients undergoing thoracic surgery that require one lung ventilation

Exclusion Criteria:

• patient who does not agree with this study
• BMI < 16.0 or BMI > 30
• cardiovascular disease, pulmonary disease, renal disease
• alcoholic abuser or drug abuser
• patient who takes any drug to influence cardiovascular system or sympathetic nervous system
• any use of local anesthetics or drugs to influence cardiovascular system during tracheal intubation