Effects of Thoracic Epidural Anesthesia With Different Local Anesthetics on Propofol Induction
Effects of Thoracic Epidural Anesthesia With Different Local Anesthetics on Propofol Induction
The investigators designed a prospective, randomized, placebo-controlled study to determine whether thoracic epidural anesthesia(TEA) with different local anesthetics has different influences on the propofol dose during induction.
Inclusion Criteria:
Surgery for thoracotomies, BMI: 18-25 Kg/m2, American Society of Anesthesiologists(ASA) classification I or II.
Exclusion Criteria:
liver or kidney disease, alcohol dependence, take sedative recently, contraindications for epidural anesthesia.