Effects of Different Thermal Insulation Methods on Nasopharyngeal Temperature in Patients Undergoing Laparoscopic Hysterectomy: A Prospective Randomized Controlled Trial

Background: The purpose of this study was to compare the thermal insulation effect of incubator and infusion thermometer in laparoscopic hysterectomy. Methods: : 75 patients were enrolled and were assigned randomly to three groups: group A used warming blanket, group B used warming blanket and infusion thermometer, group C used warming blanket and incubator. The primary outcome was nasopharyngeal temperature at different time points during the operation. Results: : The nasopharyngeal temperature of the infusion heating group was significantly higher than that of the incubator group 60min at the beginning of surgery(T3):36.10±0.20 vs 35.81±0.20( P ＜0.001)；90min at the beginning of surgery(T4):36.35±0.20 vs 35.85±0.17( P ＜0.001),and the incubator group was significantly higher than that of the control group 60min at the beginning of surgery(T3):35.81±0.20 vs 35.62±0.18( P ＜0.001);90min at the beginning of surgery(T4):35.85±0.17 vs 35.60±0.17( P ＜0.001).The wake-up time of the control group was significantly higher than that of the infusion heating group: 23.88±3.86 vs 20.56±3.80( P =0.004), and the incubator group:23.88±3.86 vs 21.52±4.02( P =0.035). Conclusion: Warming blanket (38°C) combined infusion thermometer (37°C) provides better perioperative thermal insulation, and in hospitals without infusion thermometer, an incubator can be used as a substitute. Trial registration: This trial was registered with http://www.chictr.org.cn/index.aspx,ChiCTR2000039162,20 October 2020.