Pulmonary function tests in normal Indian children and changes in respiratory disorders

Area of Science:

• Pediatric Pulmonology
• Respiratory Physiology

Background:

• Pulmonary function tests (PFTs) are crucial for diagnosing and monitoring pediatric respiratory conditions.
• Establishing normative PFT values in healthy children is essential for accurate interpretation.

Purpose of the Study:

• To determine normal pulmonary function test values in healthy children aged 8-13 years.
• To characterize the changes in PFTs associated with common pediatric respiratory disorders like bronchial asthma, pneumonia, and empyema.

Main Methods:

• A one-year study involving 95 healthy children (8-13 years) and 51 children with respiratory disorders.
• Measurement of forced vital capacity (FVC), forced expiratory volume in 1 second (FEV1), FEV1/FVC ratio, peak expiratory flow rate (PEFR), and forced expiratory flow rate between 25-75% of FVC (FEF25-75%).
• Comparison of PFT parameters between healthy controls and patient groups, matched for age, sex, and height.

Main Results:

• Children with bronchial asthma exhibited reduced FEV1/FVC%, PEFR, and FEF25-75%, correlating with disease severity.
• Pneumonia cases showed a restrictive pattern with decreased FVC and FEV1, and minimal changes in PEFR and FEF25-75%.
• Empyema patients displayed a combined pattern of significantly reduced FVC and FEV1, with mildly decreased FEV1/FVC%, PEFR, and FEF25-75%.

Conclusions:

• PFTs demonstrate distinct patterns in pediatric bronchial asthma, pneumonia, and empyema.
• These findings aid in differentiating respiratory conditions and assessing disease severity in children.
• Normative PFT data is vital for accurate diagnosis and management of pediatric lung diseases.