Observation on the efficacy of forced-air warming blandet in prevention of intraoperative hypothermia in the aged

Objective:To evaluate the effectiveness of forced-air warming blanket for prevention of intraoperative hypothermia in the aged.Methods:60 aged undergone abdominal surgery were randomly divided into two groups:group A and group B,30 cases in each group.The lower body of group A was covered with forced-air warming blanket and the system was set at 36～40 ℃, group B didn't receive warming blanket. Keep the ambient temperature of the operation room at 21～23 ℃.The change of the distal esophageal temperatures(DET) were recorded intraoperatively.Results:DET began to decrease in 30 min after induction in two groups. The DET of each point in 30,60,90 and 120 min after induction and at the end of operation, the degree of decreasing in group A were less than that in group B($$$$ P0.01). The occurrence rate of hypothermia was 33% in group A and 93% in group B.There was significant difference between group A and group B(P0.01). The rate of shiver was 13% in group A and was 40% in group B,there was significant difference between group A and group B(P0.05).Conclusion:Forced-air warming blanket has better effect on prevention of intraoperative hypothermia in the aged.