Objective To investigate the changes of blood pressure(Bp),heart rate(HR) and endothelin(ET),nitric oxide(NO) during induction of general anesthesia by tracheal intubation with thiopental,propofol and etomidate.

• 目的探讨硫喷妥钠、异丙酚、依托咪酯诱导对气管插管期间血压、脉搏及其内皮素(endothelin,ET)、一氧化氮(nitric oxide,NO)的影响。