Abstract: Objective To retrieve and summarize the evidence on body temperature management in cardiac surgery with extracorporeal circulation, and to provide basis for clinical standardized intraoperative hypothermia treatment. Methods With PICO procedure, the research topic of “temperature management of patients undergoing cardiac surgery with extracorporeal circulation” was identified, then the search for eligible literature was conducted in China Guideline Network, National Guideline Clearinghouse, National Institute for Health and Care Excellence, Guidelines International Network, Scottish Intercollegiate Guidelines Network, UpToDate, BMJ-Best Practice, Cochrane Library, Pubmed, Web of Science , EMbase, CINAHL, China Biomedical Database, China Knowledge Network, Wanfang Medical Database and Medical Pulse Flux. The quality and grade of eligible studies were evaluated using the literature quality evaluation tool of AGREE 1I, AMSTAR 2 and GRADE. Results Twelve articles were included in this study, including 3 clinical practice guideline,2 evidence summary and 7 systematic reviews,and finally 17 pieces of evidence were extracted. Fifteen review indicators, including preoperative evaluation, pre-incubation, body temperature monitoring, and low temperature jump, shallow/medium temperature stop jump, cooling and rewarming rate of deep hypothermia circulation arrest surgery, peak, temperature gradient, and body temperature management during resuscitation were summarized. Conclusion Evidence should be applied based on the experience of medical staff, clinical situation and patient's wishes and should be updated in time to ensure scientific nursing for body temperature management in cardiac surgery with extracorporeal circulation so as to improve intraoperative care quality.

Key words: cardiac surgery, techniques in extracorporeal circulation, hypothermia treatment, body temperature management, evidence-based practice