Effects of different thermal insulation methods on the nasopharyngeal temperature in patients undergoing laparoscopic hysterectomy: a prospective randomized controlled trial

BackgroundThis study explored the comparison of the thermal insulation effect of incubator to infusion thermometer in laparoscopic hysterectomy.MethodsWe assigned 75 patients enrolled in the study 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 nasopharyngeal temperature at different time points during the operation served as the primary outcome.ResultsThe nasopharyngeal temperature of the infusion heating group was significantly higher than that of the incubator group 60min from the beginning of surgery (T3): 36.100.20 vs 35.810.20 (P<0.001)90min from the beginning of surgery (T4): 36.35<plus/minus>0.20 vs 35.85 +/- 0.17 (P<0.001). Besides, the nasopharyngeal temperature of the incubator group was significantly higher compared to that of the control group 60min from the beginning of surgery (T3): 35.81<plus/minus>0.20 vs 35.62 +/- 0.18 (P<0.001); 90min from the beginning of surgery (T4): 35.85<plus/minus>0.17 vs 35.60 +/- 0.17 (P<0.001). Regarding the wake-up time, that of the control group was significantly higher compared to the infusion heating group: 24<plus/minus>4 vs 21 +/- 4 (P =0.004) and the incubator group: 24 +/- 4 vs 22 +/- 4 (P =0.035).Conclusion Warming blanket (38 degrees C) combined infusion thermometer (37 degrees C) provides better perioperative thermal insulation. Hospitals without an infusion thermometer can opt for an incubator as a substitute.Trial registration This trial was registered with ChiCTR2000039162, 20 October 2020.