Perioperative medicine & outcomes

Candidate Kidney Protective Strategies for Patients Undergoing Major Abdominal Surgery: A Secondary Analysis of the RELIEF Trial Cohort

AnesthesiologyPublished Secondary analysis of the RELIEF randomised trial

Authors' conclusion

Avoiding intraoperative nonsteroidal anti-inflammatory drugs or cyclooxygenase-2 inhibitors is a potential strategy to mitigate the risk for postoperative AKI.

Study context

Population
Adults undergoing major abdominal surgery randomised to a restrictive or liberal perioperative fluid regimenanalysed
Participants
2,444 adults
Comparison
Modifiable risk factors associated with greater maximum stage of postoperative acute kidney injury (AKI)
Primary endpoint
Maximum AKI stage
Follow-up
Before hospital discharge
Methodological detailsmultivariable ordinal regression, two modelling approaches (investigator-informed and Least Absolute Shrinkage and Selection Operator (LASSO))
  • Multivariable ordinal regression
  • Two modelling approaches (investigator-informed and LASSO)

Primary result

As reported in the abstract

Maximum AKI stage (single-group incidence)
Stage 1 AKI
223 (9.1%)
Stage 2 AKI
59 (2.4%)
Stage 3 AKI
36 (1.5%)
Intraoperative-only NSAID or COX-2 inhibitor: increased odds of greater maximum AKI stage (model 1), OR
1.77 (1.11 to 2.82) (99% CI)
Day-of-surgery ACE inhibitor or ARB vs no regular use: increased odds of greater maximum AKI stage (model 1), OR
1.84 (1.15 to 2.94) (99% CI)

Further findings

Nadir haemoglobin on POD 1 (model 2) · postoperative day 1

Inverse association between nadir haemoglobin on POD 1 and greater maximum AKI stage

Original publication

Candidate Kidney Protective Strategies for Patients Undergoing Major Abdominal Surgery: A Secondary Analysis of the RELIEF Trial Cohort. Anesthesiology. Published 21 February 2024. doi:10.1097/aln.0000000000004957

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