Abstract
Objective:
Acute kidney injury (AKI) is a frequent
postoperative complication after cardiovascular
surgery. It has been described as a predictor of decreased
survival rates, but how
dialysis decreases
survival when initiated on the
postoperative period has yet to be determined. To analyze the
survival of
patients who presented postoperative AKI requiring
dialysis up to 30 days after cardiovascular
surgery and its
risk factors is the aim of this study.
Methods:
Of the 5,189 cardiovascular surgeries performed in a 4-year period, 157
patients developed AKI requiring
dialysis in the
postoperative period. The
Kaplan-Meier survival curve and log-rank test were used in the
statistical analysis to compare the curves of categorical variables. P-value< 0.05 was considered significant.
Results:
Patient average
survival was 546 days and
mortality was 70.7%. The need for
dialysis on the
postoperative period decreased late
survival.
Risk factors for decreased
survival included age (P<0.001) and
postoperative complications (P<0.0003).
Conclusion:
The average
survival was approximately one year among dialytic
patients. Age and
postoperative complications were
risk factors that determined decreased
survival.