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Diagnosis and prognosis of acute renal injury in cardiac surgery using combined biomarkers. Running head. Biomarkers of renal injury in cardiac surgery.
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  • Alfredo Aisa Álvarez,
  • Gilberto Camarena-Alejo,
  • Juvenal Franco-Granillo ,
  • Janet S. Aguirre-Sanchez,
  • Veronica Guarner-Lans,
  • Maria Elena Soto
Alfredo Aisa Álvarez
American British Cowdray Medical Center IAP

Corresponding Author:alfredoaisa@hotmail.com

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Gilberto Camarena-Alejo
American British Cowdray Medical Center IAP
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Juvenal Franco-Granillo
American British Cowdray Medical Center IAP
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Janet S. Aguirre-Sanchez
American British Cowdray Medical Center IAP
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Veronica Guarner-Lans
Instituto Nacional de Cardiologia Ignacio Chavez
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Maria Elena Soto
Instituto Nacional de Cardiologia Ignacio Chavez
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Abstract

Objective: To determine the impact and usefulness of the combination of structural and functional biomarkers in the diagnosis of acute renal injury (AKI) and short-term prognosis of patients undergoing cardiac surgery (CS). Material and Methods. Prospective cohort study (March 2018 to December 2019). 63 adults older than 18 years old, on the Intensive Care Unit (ICU) were included. Interventions: Patients had undergone CS with extracorporeal circulation (ECC). Surgery was elective in 80% of cases; it was urgent in 18% and emergent in 3%. Exclusion criteria included chronic kidney disease, contrast medium application ≤24 hour before surgery, cancer, infectious and autoimmune diseases. On admission to the ICU, serum creatinine, urinary creatinine, urinary sediment, urinary NGAL, urinary cystatin, microalbuminuria and serum cystatin were measured. Results. AKI was found 31 cases (49%). ECC without renal damage was found when time of extracorporeal circulation was of 85 ± 25 minutes and with renal damage when it lasted 114 ± 32 (p = 0.0001). Serum creatinine has a likelihood ratio (LR) + of 5.5, the combination of serum cystatin c (cystatin C) and normalized NGAL, showed a better LR. In patients with severe irreversible AKI, the combination of cystatin C + NGAL adjusted to urinary creatinine (NGAL/uCr) + microalbuminuria had a LR+ of 18.75 and LR - of 0.26. Conclusions: The combination of biomarkers predicts and identifies severity of AKI and Biomarkers combination in Cardiac Surgery