The Incidence, Risk Factors and In-Hospital Mortality of Acute Kidney Injury in Patients After Surgery for Acute Type

Linji Li1,2, Jiaojiao Zhou3, Xuechao Hao1

  • 1Department of Anesthesiology, West China Hospital, Sichuan University & The Research Units of West China (2018RU012), Chinese Academy of Medical Sciences, Chengdu, China.

Frontiers in Medicine
|November 12, 2020
PubMed

Insights

Acute kidney injury (AKI) is common after acute type A aortic dissection (AAAD) surgery, affecting over 70% of patients and increasing mortality. Identifying risk factors for AKI and its associated mortality is crucial for improving patient outcomes.

Area of Science:

  • Cardiology
  • Nephrology
  • Surgical Outcomes

Background:

  • Acute kidney injury (AKI) is a frequent complication following cardiac surgery, associated with increased morbidity and mortality.
  • Acute type A aortic dissection (AAAD) poses a significant threat, with post-operative AKI being a closely related concern.
  • Limited data exist on AKI incidence using the latest Kidney Disease: Improving Global Outcomes (KDIGO) criteria and in-hospital mortality in AAAD patients.

Purpose of the Study:

  • To determine the incidence of AKI, defined by KDIGO criteria, in patients undergoing surgical treatment for AAAD.
  • To identify risk factors associated with the occurrence of AKI in this patient population.
  • To analyze risk factors contributing to in-hospital mortality among AAAD patients who develop AKI.

Main Methods:

  • Retrospective review of 335 patients who underwent surgical treatment for AAAD between March 2009 and June 2016.
  • Screening for AKI status and analysis of potential risk factors for AKI and in-hospital mortality.
  • Statistical analysis including independent-sample t-tests, Chi-square tests, and logistic regression to identify significant risk factors.

Main Results:

  • AKI incidence was 71.94% among AAAD patients, with stages 1, 2, and 3 occurring in 35.26%, 31.95%, and 32.78%, respectively.
  • In-hospital mortality rate was 21.16%.
  • Independent risk factors for AKI included higher BMI, chronic kidney disease, chronic liver disease, longer cardiopulmonary bypass duration, red blood cell transfusion, and hypoproteinemia. Mortality risk factors included AKI stage, deep hypothermic circulatory arrest, lactic acidosis, and need for continuous renal replacement therapy.

Conclusions:

  • AKI is a prevalent complication in surgically treated AAAD patients, significantly elevating mortality risk.
  • Identifying and mitigating risk factors for AKI are essential for improving post-operative outcomes in AAAD patients.
  • Further research and clinical attention are warranted to prevent AKI and manage its consequences in this high-risk group.

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