The Trend of Urinary N Terminal Probrain Natriuretic Peptide in Extremely Low Birth Weight Infants during the Neonatal Period

Safdar S. Khan, Henrietta S. Bada, Maritza Torres, Melvin Almodovar, Mina Hanna

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Objective N-terminal probrain natriuretic peptide (NT-proBNP) is a biomarker of interest in many cardiopulmonary diseases in extremely low birth weight (ELBW) Infants. However, there is a gap in knowledge about the trend of ELBW infant's urinary NT-proBNP during the neonatal period. Aim To determine the trend of urinary NT-proBNP during the first 4 weeks of life of an ELBW infant. Study Design We analyzed prospectively enrolled 87 ELBW infants. Urinary NT-proBNP to creatinine ratios were measured on days 1 to 7, 14, and 28 of life. We plotted each study point's means to determine the trend of urinary NT-proBNP over the entire neonatal period. Data were analyzed using the Friedman analysis of variance for comparative analysis of study points. Results Urinary NT-proBNP/creatinine ratios were significantly elevated on days 1 to 7 (mean 2,452, ± 1,518) than day 14 (mean 747, ± 176), and day 28 (mean 149, ± 54), p = 0.001. Overall, urinary NT-proBNP levels were highest during days 1 to 3 (mean 3,232, ± 1,255) and lowest on day 28 (mean 149, ± 54). Conclusion Urinary NT-proBNP levels are higher during the first week in ELBW infants with a downward trend during the neonatal period, the lowest values at 4 weeks postnatal age. More studies are required to determine the clinical utility of this trend during and beyond the neonatal period. Key Points NT-proBNP is a biomarker for monitoring cardiac disease in premature infants. The trend of urinary NT-proBNP is unknown in premature infants. A trend of urinary NT-proBNP was determined during the first 4 weeks in premature infants.

Original languageEnglish
Pages (from-to)1027-1032
Number of pages6
JournalAmerican Journal of Perinatology
Issue number10
StatePublished - Dec 7 2021

Bibliographical note

Publisher Copyright:
© 2021 Thieme Medical Publishers, Inc.. All rights reserved.


  • NT-proBNP
  • infants
  • premature
  • trend

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Obstetrics and Gynecology


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