Changes in spirometry during consecutive admissions for infective pulmonary exacerbations in adolescent and adult cystic fibrosis

Area of Science:

• Pulmonology
• Medical Research

Background:

• Cystic fibrosis (CF) is a genetic disorder affecting multiple organs, primarily the lungs.
• Pulmonary infective exacerbations are a major cause of morbidity and mortality in CF patients.
• Repeated hospitalizations are common for managing CF exacerbations.

Purpose of the Study:

• To analyze changes in spirometry parameters during consecutive admissions for pulmonary infective exacerbations in CF patients.
• To assess the long-term impact of repeated exacerbation treatments on lung function.
• To evaluate lung function trends in severe cases requiring transplantation or leading to death.

Main Methods:

• Retrospective analysis of spirometry data (FEV1, FVC) from 45 CF patients.
• Inclusion criteria: five or more admissions for pulmonary infective exacerbations.
• Comparison of lung function changes over the study period and across consecutive admissions.

Main Results:

• Significant annual decline in FEV1 (-112.1 ml/yr) and FVC (-47.9 ml/yr) observed.
• Lung function (FEV1, FVC) improved during each admission but with diminishing magnitude over consecutive admissions.
• Patients who died or underwent transplantation had FEV1 below 800 ml at their last admission, despite treatment.

Conclusions:

• Consecutive admissions for CF exacerbations are associated with a progressive decline in lung function.
• The effectiveness of treatment in improving lung function diminishes with repeated exacerbations.
• Low FEV1 levels at last admission in severe cases indicate poor prognosis despite intensive care.