Intensive Care Medicine

, Volume 38, Issue 4, pp 663–669 | Cite as

Implications of different fluid overload definitions in pediatric stem cell transplant patients requiring continuous renal replacement therapy

  • Rebecca M. Lombel
  • Mallika Kommareddi
  • Theresa Mottes
  • David T. Selewski
  • Yong Y. Han
  • Debbie S. Gipson
  • Katherine L. Collins
  • Michael Heung
Pediatric Original

Abstract

Purpose

In critically ill pediatric patients, fluid overload (FO) >10% has been identified as a threshold for possible interventions, including initiation of continuous renal replacement therapy (CRRT). However, multiple definitions have been reported, and there remains no consensus method for FO calculation. The goal of this study was to compare different methods of FO determination and to assess their relative value in predicting outcomes.

Methods

This is a retrospective single-center review of 21 pediatric stem cell transplant patients (PSCT) that required CRRT from 2004 to 2009. We compared eight definitions (4 weight-based and 4 fluid-balance based) that varied by baseline weights. Outcome measures were pediatric intensive care unit (PICU) mortality and pediatric logistic organ dysfunction (PELOD) scores.

Results

The number of patients identified as having >10% FO varied significantly according to the definition used, from 14 to 48% (p = 0.002). Significant intra-subject variability was observed; the median difference between individual minimum and maximum %FO scores was 11.4% (IQR 6.8, 17.1%). %FO was not significantly associated with PICU mortality, but five of eight FO definitions were predictive of higher subsequent PELOD scores.

Conclusion

Our study is one of the first to compare different FO definitions and the impact on predicting outcomes. Our findings suggest that depending on the FO definition used, there is significant variability in the calculated %FO in PSCT patients, and this has important implications for clinical decision-making. Further studies are necessary to determine an optimal FO definition that is clinically relevant and predictive of important outcomes.

Keywords

Acute kidney injury Continuous renal replacement therapy Fluid overload Pediatric intensive care Stem cell transplantation 

Notes

Acknowledgments

Rebecca M. Lombel is supported by the Research Training in Pediatric Nephrology grant (T-32 DK65517-8).

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Copyright information

© Copyright jointly held by Springer and ESICM 2012

Authors and Affiliations

  • Rebecca M. Lombel
    • 1
  • Mallika Kommareddi
    • 2
  • Theresa Mottes
    • 1
  • David T. Selewski
    • 1
  • Yong Y. Han
    • 3
  • Debbie S. Gipson
    • 1
  • Katherine L. Collins
    • 4
  • Michael Heung
    • 2
  1. 1.Division of Nephrology, Department of Pediatrics and Communicable DiseasesUniversity of MichiganAnn ArborUSA
  2. 2.Division of Nephrology, Department of Internal MedicineUniversity of MichiganAnn ArborUSA
  3. 3.Division of Critical Care Medicine, Department of Pediatrics and Communicable DiseasesUniversity of MichiganAnn ArborUSA
  4. 4.Department of Family MedicineSouthern Illinois University School of MedicineQuincyUSA

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