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Updated: Jul 18, 2026

A Large Animal Model for Acute Kidney Injury by Temporary Bilateral Renal Artery Occlusion
Published on: February 2, 2021
Renal recovery after severe acute renal failure
S M Bagshaw1, G Mortis, T Godinez-Luna
1Department of Critical Care Medicine, Calgary Health Region and University of Calgary, Calgary, Alberta, Canada. sean.bagshaw@austin.org.au
Most severe acute renal failure patients who survive ICU admission recover independence from renal replacement therapy within 90 days. Male sex and septic shock predict recovery, while higher comorbidity and creatinine levels predict non-recovery.
Area of Science:
- Nephrology
- Critical Care Medicine
- Epidemiology
Background:
- Limited data exists on renal recovery post-severe acute renal failure (ARF).
- Understanding factors influencing renal replacement therapy (RRT) independence is crucial for patient outcomes.
Purpose of the Study:
- To determine the rate of 90-day survival and RRT independence in critically ill patients with severe ARF.
- To identify factors associated with renal recovery after severe ARF.
Main Methods:
- Population-based surveillance of adult ICU survivors in Calgary Health Region (1999-2002).
- Analysis of 90-day survival and recovery to RRT independence.
- Multivariate analysis to identify predictive factors for recovery.
Main Results:
- 40% of patients survived to 90 days, with 72% achieving RRT independence.
- Male sex and septic shock diagnosis were associated with increased odds of recovery.
- Higher Charlson comorbidity index and pre-RRT serum creatinine levels were associated with reduced odds of recovery.
Conclusions:
- The majority of severe ARF survivors regain independence from RRT within 90 days.
- Male gender and septic shock are positive predictors of renal recovery.
- Comorbidity and elevated creatinine levels predict poor renal recovery outcomes.
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