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Bronchoalveolar Lavage (BAL) for Research; Obtaining Adequate Sample Yield
11:47

Bronchoalveolar Lavage (BAL) for Research; Obtaining Adequate Sample Yield

Published on: March 24, 2014

Adjustment of bronchoalveolar lavage volume to body weight in children

F Ratjen1, J Bruch

  • 1Department of Pediatrics, University of Essen, Germany.

Pediatric Pulmonology
|March 1, 1996
PubMed

Insights

This study determined epithelial lining fluid (ELF) recovery in children using bronchoalveolar lavage (BAL). A weight-adjusted BAL protocol yields consistent ELF fractions in pediatric patients, aiding research comparisons.

Area of Science:

  • Pediatric Pulmonology
  • Respiratory Physiology
  • Biomarker Analysis

Background:

  • Epithelial lining fluid (ELF) volume is crucial for interpreting bronchoalveolar lavage fluid (BALF) composition.
  • Accurate ELF quantification in pediatric populations is essential for understanding lung physiology and disease.

Purpose of the Study:

  • To establish the volume of ELF recovered during bronchoalveolar lavage (BAL) in children aged 3-15 years.
  • To assess the reliability of albumin and urea concentrations for ELF estimation in pediatric BALF.

Main Methods:

  • Measured serum and BALF albumin and urea concentrations in 37 children undergoing elective surgery.
  • Utilized a body weight-adjusted BAL protocol.
  • Calculated ELF volume using validated biochemical markers.

Main Results:

  • Approximately 20 μl ELF/kg body weight was consistently recovered across the pediatric age range.
  • Albumin and urea methods for ELF estimation showed significant correlation, though urea showed variability in older children.
  • Pediatric BALF exhibited higher ELF/100 ml BALF than adults, suggesting increased alveolar membrane permeability.

Conclusions:

  • A body weight-adjusted BAL protocol provides reliable ELF recovery fractions in children aged 3-15 years.
  • These findings support standardized comparisons of BALF constituents across pediatric age groups.
  • Increased alveolar permeability in children is indicated by higher ELF concentrations relative to lavage volume.

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