When should vibrations be applied during chest physiotherapy?

During chest physiotherapy, vibrations should be applied during exhalation. This technique enhances the effectiveness of airway clearance by promoting the movement of mucus within the airways. When a client exhales, the air leaving the lungs creates a dynamic environment that allows the vibrations to help loosen secretions trapped in the bronchial tubes.

Applying vibrations during exhalation assists in mobilizing sputum, making it easier for the client to expel mucus through coughing. This phase is particularly critical because the increased pressure from both the vibrations and the act of exhaling can facilitate the expulsion of respiratory secretions, which is the primary goal of chest physiotherapy.

In contrast, applying vibrations during inhalation or when the client is holding the breath may not effectively aid in mucus clearance, and doing so while the client is coughing could disrupt the coordination needed for effective coughing, thus reducing the efficacy of the therapy.