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Updated: Aug 9, 2026

Mouse Pneumonectomy Model of Compensatory Lung Growth
Published on: December 17, 2014
The functional growth and development of the lung during the first year of life
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.
Abstract:
In this article much of the available data on lung volumes and mechanics in normal infants is assessed and summarized, and growth charts for the various parameters of lung function during the first year of life are presented. There is considerable evidence to show that lung development proceeds in a highly organized manner, and that strong linear relationships exist between lung volume and body size, between dynamic compliance and lung volume, and between airway conductance (the reciprocal of airway resistance) and lung volume. However, the latter relationship is affected both by the race and postconceptional age of the infant. Specific Airway conductance is higher during infancy than at any other time during life, and this gives the newborn infant certain advantages with which to counterbalance both the small size of his lungs and the fact that he is an obligatory nose breather.
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