How often should you use a flutter valve?

The flutter is a simple and small device shaped like a pipe that creates a positive expiratory pressure (PEP) and high frequency oscillation when the expired air passes through it. These vibrations are thought to mobilise airway secretions facilitating their clearance and improving breathing .16 Nis 2013

CONCLUSIONS: The use of a flutter valve for 30 min/d for at least 4 weeks is enough to change physical properties and improve mucus transport by coughing and can contribute to the reduction of the total number of inflammatory cells of the respiratory secretions of subjects with bronchiectasis.

In the Flutter a steel ball vibrates inside a cone, causing air flow vibration. A new device, the Acapella, uses a counterweighted plug and magnet to create air flow oscillation .