Effects of epidural block combined with general anesthesia on stress response during cardiopulmonary bypass / 中华麻醉学杂志

Effects of epidural block on stress response during eardiopulmonary bypass were studied. Twenty patients, undergoing open heart surgery with cardiopulmonary bypass, were randomly divided into two groups:the control group with intravenous high-dose fentanyl and enflurane inhalation (1%-1.5%);the tested group with epidural block and enflurane inhalation (0.5%-1%). The plasma norepinephine (NE) and epinephrine (E) concentrations were higher in group control than those in tested group during and after CPB,even at the end of operation (P