The Effect of Thoracic Epidural Anesthesia With Different Block Level on Propofol Induction

The Effect of Thoracic Epidural Anesthesia With Different Block Level on Propofol Concentration During General Anesthesia Induction

It is a prospective, randomized, placebo-controlled study to investigate the effect of TEA with different block level on propofol concentration during general anesthesia induction.

Inclusion Criteria:

• American Society of Anesthesiologists (ASA) I-II physical status,
• aged 40-60 yr,
• BMI 19-25 kg/m2,
• undergoing elective gastrointestinal surgery

Exclusion Criteria:

• patients with cardiovascular or neurological disease, drug or alcohol abuse and absolute contraindications for neuraxial blockade.