Cardiothoracic & vascular anesthesia

Amino Acid Infusion for Kidney Protection in Cardiac Surgery Patients with Chronic Kidney Disease: A Secondary Analysis of the PROTECTION Trial

AnesthesiologyPublished Secondary analysis of the PROTECTION randomised trial

Primary result · AKIResult — go to the resultRelative risk 0.86 95% CI 0.74–0.99

Authors' conclusion

Amino acid infusion protected chronic kidney disease patients undergoing cardiopulmonary bypass from developing acute kidney injury, with an absolute risk reduction of 7% and a number needed to treat of 14 in a cohort with a greater than 45% rate of acute kidney injury. Moreover, it delivered a greater than 50% relative risk reduction in severe acute kidney injury.

Study context

Population
Cardiac surgery patients with CPB and CKD (eGFR <60 ml · min −1 · 1.73 m −2)
Participants
812 CKD patients
Comparison
Amino acids vs Placebo
Primary endpoint
Occurrence of AKI
Methodological detailsplacebo-controlled
  • Placebo-controlled

Primary result

AKI

Relative risk

0.86

95% CI 0.74–0.99

P = 0.041

By group

Amino acids vs Placebo
RR 0.86 (95% CI 0.74–0.99); P = 0.041

As reported in the abstract

Secondary outcomes

OutcomeAmino acidsPlaceboRR (95% CI)P value
Severe (stage 3) AKI2.7%5.6%0.48 (0.24–0.98)P = 0.038

Median

OutcomeAmino acidsPlaceboP value
Median percentage increase in eGFR from baseline · postoperative day 312.7%6.5%P = 0.002

AKI by eGFR-based CKD subgroup (30 to 39, 40 to 49, 50 to 59 ml · min −1 · 1.73 m −2) (subgroup)

Amino acid effect similar across subgroups
  • Interaction P = 0.50

Original publication

Amino Acid Infusion for Kidney Protection in Cardiac Surgery Patients with Chronic Kidney Disease: A Secondary Analysis of the PROTECTION Trial. Anesthesiology. Published 19 December 2024. doi:10.1097/aln.0000000000005336

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