Airway Clearance Units, High-Frequency Chest Wall Oscillation
Definition : Airway clearance units designed to apply automated mechanical oscillation to the chest wall to obtain a high-frequency oscillation (HFO) of the air column in the conducting airways. These devices may use one of several techniques to provide the oscillation, including external percussion on the chest wall, intermittent compression by a patient-worn vest, and a cycle of positive and negative pressure compression provided by a cuirass around the patient chest. High-frequency chest wall oscillation units are intended to shear mucus from the airway wall by oscillatory forces and to aid in mucus mobilization and expectoration; some units are capable of providing mechanical ventilation of patients. Devices that perform chest wall oscillation using a cuirass may also act as mechanical ventilators.
Entry Terms : "High-Frequency Oscillation Units, Chest-Wall" , "Oscillatory Airway Clearance Units"
UMDC code : 20738