Objective To compare the effect of two warming methods on prevention of hypothermia during videoassisted thoracic surgery. MethodsA total of 70 patients undergoing videoassisted thoracic surgery were recruited and randomly allocated to receive either forcedair warming （n=36） or resistive heating (n=34). ResultsThe mean patient core temperatures were higher than 36℃ during the surgery in both groups. Core temperatures were significantly higher in the resistive heating group compared with the forcedair warming group after intubation, at the start of surgery and at 30 min during the surgery (P<0.01 for all), but there were no significant differences between the two groups at 60 min during the surgery until the end of surgery (P>0.05 for all). ConclusionBoth resistive heating and forcedair warming are effective in preventing intraoperative hypothermia during videoassisted thoracic surgery, and the carbonpolymer resistive heating mattresses offer more stable temperatures.