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A gestation- and postnatal age-based reference chart for assessing renal function in extremely premature infants

S Thayyil1, S Sheik, S T Kempley

  • 1Department of Cardiovascular Imaging, Great Ormond Street Hospital, UCL Institute of Child health, London, UK. s.thayyil@ich.ucl.ac.uk

Journal of Perinatology : Official Journal of the California Perinatal Association
|February 22, 2008
PubMed

Insights

Plasma creatinine reference ranges are essential for assessing renal function in premature infants. This study established gestational age-based charts for extremely premature babies, improving diagnostic accuracy.

Area of Science:

  • Neonatal Medicine
  • Pediatric Nephrology
  • Clinical Chemistry

Background:

  • Plasma creatinine levels vary significantly in premature infants due to gestational and postnatal age.
  • A single creatinine value is insufficient for diagnosing renal dysfunction in this population.

Purpose of the Study:

  • To develop reference ranges for plasma creatinine in extremely premature infants.
  • To provide age- and gestation-specific charts for accurate interpretation.

Main Methods:

  • Retrospective analysis of plasma creatinine levels.
  • Inclusion of 161 premature infants (gestational age ≤ 28 weeks).
  • Data collected within the first 8 weeks of life.

Main Results:

  • Peak creatinine levels differed significantly across gestational age groups (22-24, 25-26, 27-28 weeks).
  • Creatinine levels increased initially, then decreased, stabilizing around 5 weeks.
  • Gestational age significantly impacts plasma creatinine values.

Conclusions:

  • Gestation- and age-based reference charts are crucial for interpreting plasma creatinine in extremely premature infants.
  • These charts will aid in the accurate assessment of renal function.
Abstract

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