Airway Clearance Units, High-Frequency Chest Wall Oscillation, Cuirass
Definition : Airway clearance units designed to applied high-frequency oscillation (i.e., compression) to the chest wall using an external, flexible chest enclosure (a cuirass, similar to those used in negative pressure ventilators), delivering noninvasive oscillation (i.e., cycles of positive and negative pressure) to the airways and lungs. These devices typically include an electrically powered oscillator that is controlled using a microprocessor. The expiratory pressure may be positive, atmospheric, or negative, permitting ventilation above, at, or below the patient normal residual capacity; frequency may be typically controlled in the range of -70 to +70 cm of water and pressure from 8 to several hundred oscillations/minute. Cuirass airway clearance units are intended for administration of therapy for mucus clearance and sputum induction; they may be used also to provide mechanical ventilation to some patients.
Entry Terms : "Chest-Wall Compression Units, Cuirass" , "Hayek Oscillators"
UMDC code : 20741