A hand-held pneumatic device designed to provide external vibrations to the chest wall of a patient (child to adult) to loosen excessive airway secretions [mucus or sputum (phlegm)] to promote airway clearance and improve bronchial drainage for patients with respiratory disease [e.g., cystic fibrosis (CF), neuromuscular disease, bronchitis, bronchiectasis, chronic obstructive pulmonary disease (COPD)]. It consists of a pneumatic valve with connecting hose that is connected to a medical facility's gas supply; it typically requires a gas pressure of 3.5 bar (50 psi). It is intended to be operated by a healthcare professional and is often referred to as a ?hand-held hammer?.