Abstract: Objective To study the effect of different forced-air-warming strategies on incidence of shivering during cesarean section. Methods Sixty patients scheduled for cesarean section were randomly divided into four groups: control group (group A), prewarming group (group B), combined warming group (group C) and intraoperative warming group (group D). In group A, conventional passive warming was applied. Active warming was applied only 15 minutes before the induction of anesthesia in group B, only during surgery in group D and both in group C. Core temperature, incidence of shivering and shivering grading status were recorded. Results Core body temperature in four groups were reduced over time and there was a significant lower change in group C（0.39±0.26℃）than the other three groups（P<0.01）. The incidence of shivering in four groups were 60.0%, 13.3%, 6.7%, 6.7%, and was lower in group B, group C and group D than that in control group（P<0.01）. Conclusions Forced-air-warming system could effectively reduce the incidence of shivering in patients with cesarean section, and prewarming combined with intraoperative warming could most effectively reduce intraoperative hypothermia.

Key words: warming, caesarean section, shivering