Intraoperative Hypothermia is Associated With Reduced Acute Kidney Injury After Spine Surgery Under General Anesthesia: A Retrospective Observational Study

Background: Although hypothermia is known to have protective effects against ischemic injuries, the effects of hypothermia on kidney injury have not yet been elucidated. Therefore, this study aimed to identify the association between intraoperative hypothermia and postoperative acute kidney injury (AKI) in patients who underwent spine surgery under general anesthesia. Methods: In this retrospective observational study, we analyzed the medical records of adult patients who underwent elective spine surgery between January 2010 and March 2018. Patients were classified into the normothermia group (36.5 to 37.5°C), mild hypothermia group (35 to 36.5°C), and hypothermia group (

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