Incidence of postanesthetic shivering in patients undergoing radical operation for lung cancer under dexmedetomidine- assisted anesthesia / 中华麻醉学杂志

ABSTRACT

Objective To evaluate the incidence of postanesthetic shivering in patients undergoing radical operation for lung cancer under dexmedetomidine-assisted anesthesia.Methods Eighty ASA Ⅰ or Ⅱ patients,aged 50-75 yr,height 158-180 cm,weighing 48-79 kg,scheduled for radical operation for lung cancer under general anesthesia combined with epidural anesthesia,were randomly divided into 2 groups ( n =40 each) normal saline control group (group C) and dexmedetomidine group(group D).Anesthesia was induced with midazolam,fentanyl,propofol and rocuronium.The patients were tracheal intubated and mechanically ventilated.Anesthesia was maintained with sevoflurane inhalation and intermittent epidural ropivacaine.BIS was maintained at 40-55.Group D received dexmedetomidine intravenous infusion at 0.5 μg · kg- 1· h- 1 from immediately after tracheal intubation until 1 h before the end of operation,and group C received the equal volume of normal saline.The shivering within 1 h after operation was scored and recorded.Results The incidence rate of postanesthetic shivering was 50％ in group C and 10％ in group D.Compared with group C,the incidence rate and degree of shivering were decreased in group D( P ＜ 0.05).Conclusion Dexmedetomidine-assisted anesthesia can reduce the incidence of postanesthetic shivering in patients undergoing radical operation for lung cancer.