[Bronchoalveolar lavage in childhood: technical aspects and reference values]

Area of Science:

• Pediatric Pulmonology
• Immunology
• Clinical Chemistry

Context:

• Bronchoalveolar lavage (BAL) is increasingly utilized in pediatric respiratory diagnostics.
• Interpretation of BAL findings in children is hindered by the absence of established pediatric reference values.
• This study addresses the need for standardized BAL assessment in pediatric patients.

Purpose:

• To discuss methodological aspects of BAL in children.
• To provide standard reference values for assessing BAL in pediatric patients.
• To establish criteria for interpreting BAL findings in pediatric pulmonary diseases.

Summary:

• A study of 50 healthy children (3-15 years) established reference values for BAL cellular and non-cellular components.
• Key findings include elevated granulocyte counts in children under 8, a lower CD4/CD8 quotient compared to adults, and increased plasma proteins and phospholipids in younger children.
• These age-specific differences in BAL composition are crucial for accurate interpretation of pediatric lung diseases.

Impact:

• Provides essential pediatric-specific reference values for bronchoalveolar lavage analysis.
• Improves the diagnostic accuracy of pediatric pulmonary diseases.
• Enhances the clinical utility of BAL in pediatric respiratory medicine.