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Serial lung function studies in cystic fibrosis in the first 5 years of life
Insights
Cystic fibrosis lungs may be normal at birth, with damage developing later even in asymptomatic infants. Early lung function tests in infants with cystic fibrosis show damage can occur before symptoms appear.
Area of Science:
- Pediatric Pulmonology
- Respiratory Medicine
- Genetic Disorders
Background:
- Cystic fibrosis (CF) is a genetic disorder affecting lungs.
- Early detection and understanding of lung damage progression in CF are crucial.
- Infant lung function in CF requires further investigation.
Purpose of the Study:
- To assess lung mechanics and function in infants with cystic fibrosis.
- To track the progression of lung abnormalities from infancy to childhood.
- To determine if lung damage in CF begins before clinical symptoms manifest.
Main Methods:
- Studied lung mechanics in 8 infants with cystic fibrosis at 6 months of age.
- Measured radioisotopic lung function in 5 of these children at 5 years of age.
- Compared lung function between initially asymptomatic and symptomatic children.
Main Results:
- Infants who were asymptomatic initially had normal lung mechanics.
- Two asymptomatic children showed abnormal radioisotopic lung function at 5 years.
- Symptomatic children exhibited abnormalities in infancy, worsening by age 5.
Conclusions:
- The lungs in cystic fibrosis are likely normal at birth.
- Lung damage in cystic fibrosis appears to develop progressively over time.
- Abnormalities can occur even in the absence of symptoms, highlighting the need for early monitoring.
Abstract:
Lung mechanics were studied in 8 infants with cystic fibrosis at 6 months of life and radiosotopic lung function was measured in 5 of them at 5 years of age. The children who were initially asymptomatic had normal lung mechanics in infancy but the 2 restudied later had abnormal radioisotopic lung function. The symptomatic children showed abnormalities in infancy and more marked changes later. It is concluded that the lungs in cystic fibrosis are probably normal initially and that damage occurs later even in the absence of symptoms.