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Research| Volume 36, ISSUE 1, P41-46, February 2021

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The Relationship of Postoperative Delirium and Unplanned Perioperative Hypothermia in Surgical Patients

Published:October 13, 2020DOI:https://doi.org/10.1016/j.jopan.2020.06.015

      Abstract

      Purpose

      The purpose of this study was to investigate associations between postoperative delirium (POD) and unplanned perioperative hypothermia (UPH) among adults undergoing noncardiac surgery.

      Design

      A retrospective, exploratory design was used.

      Methods

      A retrospective, exploratory study was conducted using electronic medical record data abstracted from a purposive convenience sample of adult patients undergoing noncardiac surgery from January 2014 to June 2017.

      Findings

      The analyzed data set included 22,548 surgeries, of which 9% experienced POD. Logistic regression indicated that American Society of Anesthesiologists (ASA) class was the strongest predictor of POD (χ2 = 1,207.11, df = 4, inclusive of all ASA class terms). A significant relationship between UPH and POD (χ2 = 54.94, df = 4, inclusive of all UPH terms) and a complex relationship among UPH, patient age, ASA class, and POD were also found.

      Conclusions

      Results support a relationship between UPH and POD. Notably, there is also a complex relationship in the noncardiac surgery population among UPH, age, ASA class, and POD. Preliminary understanding of this relationship is based on the pathophysiological response to surgical stress. Further research is indicated.

      Keywords

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      Linked Article

      • Assessing Relationship of Postoperative Delirium and Unplanned Perioperative Hypothermia in Surgical Patients
        Journal of PeriAnesthesia NursingVol. 36Issue 6
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          With a great interest we read the recent article by Wagner et al1 assessing the relationship of postoperative delirium (POD) and unplanned perioperative hypothermia (UPH) in adult patients undergoing noncardiac surgery. They showed a significant relationship between UPH and POD. Furthermore, there are complex relationships among UPH, age, ASA physical status class and POD. Given that POD is significantly associated with increased lengths of ICU and hospital stay, costs, morbidity and mortality after noncardiac surgery,2 their findings have potential implications.
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