Study of pulmonary function tests in thalassemic children.

Area of Science:

• Pediatric Pulmonology
• Hematology
• Radiology

Background:

• Thalassemia is a genetic blood disorder associated with iron overload.
• Pulmonary complications in children with thalassemia are increasingly recognized.
• The impact of iron status on respiratory health in pediatric thalassemia requires further investigation.

Purpose of the Study:

• To evaluate pulmonary function tests (PFTs) in children with thalassemia.
• To assess the relationship between respiratory impairment and body iron status.
• To elucidate the underlying causes of pulmonary dysfunction in this population.

Main Methods:

• Pulmonary function tests (PFTs), including lung volumes and carbon monoxide diffusion capacity (DLco), were performed.
• High-resolution computed tomography of the chest (CHRCT) and bronchoalveolar lavage (BAL) were utilized.
• Serum ferritin levels and iron-laden macrophages in BAL were analyzed.

Main Results:

• 41.16% of patients had impaired DLco, 16.12% showed restriction, and 3.22% had obstruction.
• A significant inverse correlation was found between DLco and serum ferritin.
• Ferritin levels predicted forced vital capacity and total lung capacity; CHRCT revealed bronchial dilatation and air trapping.

Conclusions:

• Iron overload significantly impacts pulmonary function in children with thalassemia.
• Elevated serum ferritin and iron-laden macrophages are associated with reduced lung function.
• Iron chelation therapy may be crucial for managing respiratory complications in pediatric thalassemia.