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. 2022 Mar 3;17(3):e0264329.
doi: 10.1371/journal.pone.0264329. eCollection 2022.

Clinically adjudicated deceased donor acute kidney injury and graft outcomes

Affiliations

Clinically adjudicated deceased donor acute kidney injury and graft outcomes

Sherry G Mansour et al. PLoS One. .

Abstract

Background: Acute kidney injury (AKI) in deceased donors is not associated with graft failure (GF). We hypothesize that hemodynamic AKI (hAKI) comprises the majority of donor AKI and may explain this lack of association.

Methods: In this ancillary analysis of the Deceased Donor Study, 428 donors with available charts were selected to identify those with and without AKI. AKI cases were classified as hAKI, intrinsic (iAKI), or mixed (mAKI) based on majority adjudication by three nephrologists. We evaluated the associations between AKI phenotypes and delayed graft function (DGF), 1-year eGFR and GF. We also evaluated differences in urine biomarkers among AKI phenotypes.

Results: Of the 291 (68%) donors with AKI, 106 (36%) were adjudicated as hAKI, 84 (29%) as iAKI and 101 (35%) as mAKI. Of the 856 potential kidneys, 669 were transplanted with 32% developing DGF and 5% experiencing GF. Median 1-year eGFR was 53 (IQR: 41-70) ml/min/1.73m2. Compared to non-AKI, donors with iAKI had higher odds DGF [aOR (95%CI); 4.83 (2.29, 10.22)] and had lower 1-year eGFR [adjusted B coefficient (95% CI): -11 (-19, -3) mL/min/1.73 m2]. hAKI and mAKI were not associated with DGF or 1-year eGFR. Rates of GF were not different among AKI phenotypes and non-AKI. Urine biomarkers such as NGAL, LFABP, MCP-1, YKL-40, cystatin-C and albumin were higher in iAKI.

Conclusion: iAKI was associated with higher DGF and lower 1-year eGFR but not with GF. Clinically phenotyped donor AKI is biologically different based on biomarkers and may help inform decisions regarding organ utilization.

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Conflict of interest statement

The authors have declared that no competing interests exist.

Figures

Fig 1
Fig 1. Study flow diagram.
Shows the breakdown of our study. A total of 428 donors with available charts were included in our study. Among the 428 donors, 291 had AKI at anytime point during the hospitalization. Only donors with AKI were adjudicated, and 106 were found to have hemodynamic AKI, 101 mixed AKI and 84 intrinsic AKI.
Fig 2
Fig 2. Associations of AKI phenotypes with DGF and 1-year eGFR.
Shows the independent associations between AKI phenotypes as compared to hemodynamic AKI and the outcomes of delayed graft function and 1-year eGFR. The exposure of AKI phenotypes is shown both as defined by AKI happening anytime during donor hospitalization as well as AKI at time of organ procurement.

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