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Acute kidney injury in necrotizing enterocolitis predicts mortality

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Abstract

Background

Morbidity and mortality with necrotizing enterocolitis (NEC) remains a significant challenge. Acute kidney injury (AKI) has been shown to worsen survival in critically ill neonates. To our knowledge, this study is the first to evaluate the prevalence of AKI and its impact on outcomes in neonatal NEC.

Methods

We carried out a single-center retrospective chart review of all neonates treated for NEC between 2003 and 2015 (N = 181). AKI is defined as a rise in serum creatinine (SCr) from a previous trough according to neonatal modified KDIGO criteria (stage 1 = SCr rise 0.3 mg/dL or SCr 150 < 200%, stage 2 = SCr rise 200 < 300%, stage 3 = SCr rise ≥300%, SCr 2.5 mg/dL or dialysis). Primary outcome was in-hospital mortality and secondary outcomes were hospital length of stay (LOS) and need for and type of surgery.

Results

Acute kidney injury occurred in 98 neonates (54%), with 39 stage 1 (22%), 31 stage 2 (18%), and 28 stage 3 (16%), including 5 requiring dialysis. Non-AKI and AKI groups were not statistically different in age, weight, Bell’s NEC criteria, and medication exposure (vasopressors, vancomycin, gentamicin, or diuretic). Neonates with AKI had higher mortality (44% vs 25.6%, p = 0.008) and a higher chance of death (HR 2.4, CI 1.2–4.8, p = 0.009), but the effect on LOS on survivors did not reach statistical significance (79 days, interquartile range [IQR] 30–104 vs 54 days, IQR 30–92, p = 0.09). Overall, 48 (27.9%) patients required surgical intervention.

Conclusions

This study shows that AKI not only occurs in over half of patients with NEC, but that it is also associated with more than a two-fold higher mortality, highlighting the importance of early recognition and potentially early intervention for AKI.

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Abbreviations

AKI:

Acute kidney injury

NEC:

Necrotizing enterocolitis

NICU:

Neonatal intensive care unit

KDIGO:

Kidney Disease Improving Global Outcomes

DIC:

Disseminated intravascular coagulopathy

VON:

Vermont Oxford Network

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Authors and Affiliations

  1. Department of Pediatric Surgery, C.S. Mott Children’s Hospital, University of Michigan, Ann Arbor, MI, USA

    Cory N. Criss, Bipin Sunkara, Joshua S. Gish, Lily Hsieh, Jennifer S. Mcleod, Jason O. Robertson & Samir K. Gadepalli

  2. Department of Pediatrics & Communicable Disease, Division of Pediatric Nephrology, C.S. Mott Children’s Hospital, University of Michigan, Ann Arbor, MI, USA

    David T. Selewski

  3. Department of General Surgery, Michigan Medicine, Ann Arbor, MI, USA

    Niki Matusko

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  1. Cory N. Criss
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  2. David T. Selewski
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Correspondence to David T. Selewski.

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The authors do not have any potential conflicts of interest, real or perceived; there are no financial sponsors for this study. No honorarium, grant, or other form of payment was given to anyone to produce the manuscript.

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Criss, C.N., Selewski, D.T., Sunkara, B. et al. Acute kidney injury in necrotizing enterocolitis predicts mortality. Pediatr Nephrol 33, 503–510 (2018). https://doi.org/10.1007/s00467-017-3809-y

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  • DOI: https://doi.org/10.1007/s00467-017-3809-y

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