What is the role of chest physiotherapy in patients with thick secretions?

• A. Postural drainage, chest percussion, and vibration to facilitate mucus clearance
• B. Humidified oxygen therapy only
• C. Nebulized bronchodilators only
• D. Mechanical ventilation without chest therapies

Answer: (A)

When secretions are thick, the goal is to move mucus from the smaller airways up into the larger airways where it can be coughed out. Chest physiotherapy does exactly that by combining three techniques. Postural drainage uses specific body positions to use gravity to drain secretions from different lung segments toward the central airways. Chest percussion involves rhythmic cupping of the chest to loosen mucus stuck to the airway walls. Vibration adds gentle shaking during exhalation to further loosen and move mucus toward the larger airways. Together, these steps facilitate mucus clearance, reduce airway obstruction, and can improve ventilation and oxygenation when used appropriately alongside other therapies.

Humidified oxygen therapy helps keep airways moist but does not actively mobilize secretions. Nebulized bronchodilators can widen airways but are not mucus-clearing techniques by themselves. Mechanical ventilation without chest therapies may support breathing but does not specifically enhance mucus clearance.