The functional growth and development of the lung during the first year of life

Early Human Development
|December 1, 1977
PubMed

Insights

Lung development in infants follows an organized pattern, with lung function closely related to body size. Specific airway conductance is notably higher in infants, aiding their respiratory function despite small lung volumes.

Area of Science:

  • Pediatric Pulmonology
  • Infant Respiratory Physiology

Background:

  • Infant lung development is crucial for lifelong respiratory health.
  • Understanding normal lung function in infants is essential for diagnosing respiratory conditions.
  • Existing data on infant lung mechanics requires comprehensive assessment and summarization.

Purpose of the Study:

  • To assess and summarize available data on lung volumes and mechanics in healthy infants.
  • To present growth charts for lung function parameters during the first year of life.
  • To examine relationships between lung function parameters and infant characteristics.

Main Methods:

  • Systematic review and synthesis of existing data on infant lung volumes and mechanics.
  • Development of growth charts for key lung function parameters.
  • Analysis of correlations between lung function and body size, race, and postconceptional age.

Main Results:

  • Lung development in infants is highly organized with linear relationships between lung volume and body size.
  • Dynamic compliance and airway conductance show strong linear correlations with lung volume.
  • Specific airway conductance is significantly higher in infants compared to other life stages.

Conclusions:

  • Infant lung function exhibits predictable growth patterns related to body size.
  • Higher specific airway conductance in newborns offers compensatory advantages for breathing.
  • Factors like race and postconceptional age influence airway conductance in infants.

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