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Long-term follow-up of extremely low birth weight infants with neonatal renal failure

Carolyn L Abitbol1, Charles R Bauer, Brenda Montané

  • 1Division of Pediatric Nephrology, University of Miami/Holtz Children's Hospital, PO Box 016960, Miami, FL 33101, USA. cabitbol@med.miami.edu

Pediatric Nephrology (Berlin, Germany)
|July 2, 2003
PubMed

Insights

Preterm infants with extremely low birth weight and acute kidney injury face long-term risks. Early indicators like high proteinuria and creatinine predict worsening kidney function, enabling timely interventions.

Area of Science:

  • Pediatric Nephrology
  • Neonatal Intensive Care
  • Long-term Health Outcomes

Background:

  • Extremely low birth weight (ELBW) infants are vulnerable to neonatal acute kidney injury (AKI).
  • Long-term renal outcomes for ELBW survivors with neonatal AKI are not well-defined.
  • Understanding progression factors is crucial for this growing population.

Purpose of the Study:

  • To investigate the long-term renal function in preterm infants with ELBW and neonatal AKI.
  • To identify predictors of progressive renal disease in this cohort.
  • To inform surveillance and potential interventions for renal preservation.

Main Methods:

  • Retrospective study of 20 preterm infants with ELBW and neonatal AKI over 18 years.
  • Comparison of renal function trajectories (progressive disease vs. normal function).
  • Analysis of proteinuria (urine protein/creatinine ratio), serum creatinine, and body mass index as potential predictors.

Main Results:

  • Nine patients (45%) showed deterioration in renal function (low GFR group).
  • Increasing proteinuria strongly correlated with renal function decline (r=0.8, P<0.0001).
  • Key predictors for progression included proteinuria >0.6 at 1 year (100% sensitivity), serum creatinine >0.6 mg/dl at 1 year (80% PPV), and obesity (BMI >85th percentile).

Conclusions:

  • Early-onset proteinuria and elevated creatinine in ELBW infants with neonatal AKI predict long-term renal decline.
  • Identifying these risk factors allows for targeted monitoring and interventions.
  • Proactive management can help preserve renal function in survivors.

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