Bronchiolitis is an acute bacterial infection of the small and terminal bronchi called bronchioles. This condition causes obstruction of the bronchioles. When the bronchioles are infected, they become inflamed, swollen, and edematous, secreting a lot of mucus, causing the child's airways to narrow, making it difficult to breathe, and even causing obstruction due to mucus leading to collapsed lungs.

Chest percussion is a technique performed on patients with respiratory diseases, helping to loosen phlegm, thereby eliminating waste products from the body.

Postural percussion and vibration drainage technique is used in the treatment of respiratory diseases to reduce phlegm retention, increase the effectiveness of respiratory treatment, improve lung function, reduce complications, as well as hospital stay.