Analysis Of Prevalence And Influencing Factors Of Hypothermia During General Anesthesia In Infants

Objective:To investigate the prevalence of hypothermia in infants during general anesthesia and analyze its influencing factors,so as to provide reference for predicting and identifying high-risk groups of intraoperative hypothermia and reducing the incidence of intraoperative hypothermia.Methods:This cross-sectional study was conducted from January 2022 to December2022,a total of 436 children who underwent elective surgery and tracheal intubation under general anesthesia in the operating room of a third-grade hospital in Shenyang Province were studied.General data,preoperative vital signs,anesthesia-related factors,operation-related factors,liver and kidney function,blood routine and coagulation function were collected.The general data,preoperative vital signs,anesthesia-related factors,operation-related factors,liver and kidney function,blood routine and coagulation function were collected.The temperature data of the children were measured with MP00993 temperature probe of Infinity Delta series monitors in Shanghai.The children were divided into hypothermic group(<36 ℃)and normothermic group(≥ 36 ℃).SPSS25.0 software was used to analyze the data.Single factor analysis and multivariate Logistic regression analysis were used to explore the prevalence and influencing factors of hypothermia during general anesthesia in infants.Results : 1.This study showed that 82 of 436 children who underwent general anesthesia had intraoperative hypothermia(<36 ℃),and the incidence of hypothermia was 18.8%.2.The results of univariate analysis showed that there were significant differences between hypothermia group and normal temperature group in age,body surface area,BMI,birth weight,term,baseline body temperature,anesthesia duration,ASA grade,operative duration,irrigation volume,fluid infusion,blood loss,blood transfusion,type of operation,operation mode,surgical position,total protein,blood urea nitrogen,red blood cells and hematocrit(P < 0.05).3.Multivariate logistic regression analysis showed that compared with 0-1 year-old infants,1-2 year-old(OR=0.35,95%CI 0.19-0.64)and 2-3 year-old infants(OR=0.17,95% CI 0.05-0.58)had a lower risk of intraoperative hypothermia;Compared with full-term infants,preterm infants have a higher risk of intraoperative hypothermia(OR=5.70,95%CI1.60-8.32);Compared with ASA Ⅰ,infants with ASA Ⅲ have a higher risk of hypothermia during operation(OR=3.78,95%CI 2.63-7.22);Compared with endoscopic surgery,infants undergoing surgery have a higher risk of intraoperative hypothermia(OR=8.53,95% CI 3.90-10.45);The longer the operation time(OR=1.21,95% CI 1.05-1.39),the more amount of intraoperative flushing fluid(OR=1.04,95%CI 1.02-1.07),and the more amount of intraoperative blood loss(OR=1.03,95% CI1.01-1.06),the higher the risk of intraoperative hypothermia in infants;The higher the BMI(OR=0.33,95% CI 0.13-0.86),the lower the risk of intraoperative hypothermia in infants.Conclusion:1.There is a high risk of hypothermia in infants during operation.2.The body surface area,birth weight,baseline body temperature,duration of anesthesia,intraoperative fluid infusion,blood transfusion,operative type,surgical position,total protein,blood urea nitrogen,red blood cells,and hematocrit of infants are the influencing factors of postoperative hypothermia.3.Age,full-term,BMI,ASA grade,operation time,irrigation volume,blood loss and operation mode were the independent influencing factors of hypothermia during general anesthesia in infants.