Pulmonary function testing in children and infants
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Updated: May 2, 2026

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Published on: February 2, 2024
B Vogt1, C Falkenberg, N Weiler
1Department of Anaesthesiology and Intensive Care Medicine, University Medical Centre Schleswig-Holstein, Campus Kiel, Kiel, Germany.
Insights
Pulmonary function testing in children is challenging due to uncooperative subjects and equipment. This review covers various techniques for assessing lung function in infants and children, highlighting new regional assessment possibilities.
Area of Science:
- Pediatric Pulmonology
- Respiratory Physiology
- Medical Device Technology
Background:
- Pulmonary function testing (PFT) is crucial for monitoring lung development and diagnosing respiratory diseases in children.
- Assessing lung function in infants and young children presents significant challenges due to cooperation issues, test duration, and equipment.
- Established PFT methods are vital for tracking disease progression and treatment efficacy in pediatric patients.
Purpose of the Study:
- To review various examination techniques for pulmonary function assessment in children and infants.
- To describe the principles, procedures, interpretation, and limitations of current PFT methods for pediatric populations.
- To highlight emerging technologies for regional lung function analysis in children.
Main Methods:
- Review of existing literature on pulmonary function testing methodologies in pediatric populations.
- Description of global and regional lung function assessment techniques.
- Analysis of measurement principles, clinical applications, and data interpretation.
Main Results:
- Significant challenges exist in obtaining high-quality, reproducible PFT results in young children.
- Comparability between devices and centers, along with reference value availability, remains a challenge for many PFT techniques.
- New technologies enable regional lung function assessment, offering insights into lung heterogeneity.
Conclusions:
- Despite challenges, PFT is essential for pediatric respiratory health management.
- Advancements in PFT technology, particularly regional analysis, promise improved understanding of pediatric respiratory pathophysiology.
- Standardization and development of reference values are critical for advancing PFT in children.
Abstract:
Pulmonary function testing is performed in children and infants with the aim of documenting lung development with age and making diagnoses of lung diseases. In children and infants with an established lung disease, pulmonary function is tested to assess the disease progression and the efficacy of therapy. It is difficult to carry out the measurements in this age group without disturbances, so obtaining results of good quality and reproducibility is challenging. Young children are often uncooperative during the examinations. This is partly related to their young age but also due to the long testing duration and the unpopular equipment. We address a variety of examination techniques for lung function assessment in children and infants in this review. We describe the measuring principles, examination procedures, clinical findings and their interpretation, as well as advantages and limitations of these methods. The comparability between devices and centres as well as the availability of reference values are still considered a challenge in many of these techniques. In recent years, new technologies have emerged allowing the assessment of lung function not only on the global level but also on the regional level. This opens new possibilities for detecting regional lung function heterogeneity that might lead to a better understanding of respiratory pathophysiology in children.
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