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Predictors and Outcomes of Acute Kidney Injury after Cardiac Surgery

Joanne Thanavaro1, John Taylor2, Linda Vitt3

  • 1Associate Dean of Graduate Nursing Education, the Director of Advanced Practice Nursing, and an Associate Professor of Nursing, St. Louis University School of Nursing. St. Louis, MO.

Nephrology Nursing Journal : Journal of the American Nephrology Nurses' Association
|March 6, 2019
PubMed

Insights

Acute kidney injury (AKI) affects over 30% of cardiac surgery patients. Identifying risk factors like smoking and respiratory failure aids in early detection and improved patient outcomes.

Area of Science:

  • Nephrology
  • Cardiology
  • Critical Care Medicine

Background:

  • Acute kidney injury (AKI) is a significant complication following cardiac surgery.
  • The Kidney Disease: Improving Global Outcomes (KDIGO) criteria provide a standardized framework for AKI classification.

Purpose of the Study:

  • To identify predictors of AKI development and severity after cardiac surgery.
  • To evaluate the association between AKI and postoperative outcomes.

Main Methods:

  • Retrospective study design.
  • Analysis of patient data to determine AKI incidence based on KDIGO criteria.
  • Statistical analysis to identify predictors and outcomes associated with AKI.

Main Results:

  • The overall incidence of AKI was 30.3% for Stage 1, 7.1% for Stage 2, and 7.9% for Stage 3.
  • Predictors for all AKI stages included smoking history, postoperative acute respiratory failure, and blood transfusion.
  • Hypertension, cardiopulmonary bypass, and postoperative coma/encephalopathy predicted higher AKI stages.
  • AKI was significantly associated with prolonged ICU/hospital stays, reduced home discharge rates, and increased mortality.

Conclusions:

  • AKI is a frequent and serious complication after cardiac surgery.
  • Identifying patients at risk for AKI through specific predictors is crucial.
  • Understanding AKI predictors can guide preventative strategies and improve patient management post-cardiac surgery.

Keywords:
KDIGOacute kidney injurycardiac surgery

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