High-frequency positive-pressure ventilation

HFPPV High-frequency positive-pressure ventilation conventional mechanical ventilation at faster-than-usual rates. 

Positive-pressure ventilation (PPV) provides vital support to maintain adequate ventilation and oxygenation during the acute phase of RDS. Effective PPV is accomplished by generating a pressure that exceeds the closing pressure of the lung. Ventilation modes delivering this positive pressure are conventional mechanical ventilation (CV), high-frequency ventilation (HFV), patient proportional... 

Several devices are also available to promote airway clearance. Flutter valve devices employ oscillating positive expiratory pressure (OPEP) to cause vibratory air flow obstruction and an internal percussive effect to mobilize secretions. Intrapulmonary percussive ventilation (IPV) provides continuous oscillating pressures during inhalation and exhalation. Finally the most commonly used technique is high-frequency chest compression (HFCC) with an inflatable vest that provides external oscillation. Vest therapy is often preferred by patients because they can independently perform the therapy even from an early age.5,14... 

Langenderfer B. Alternatives to percussion and postural drainage. A review of mucus clearance therapies percussion and postural drainage, autogenic drainage, positive expiratory pressure, flutter valve, intrapulmonary percussive ventilation, and high-frequency chest compression with the ThAIRapy Vest J Cardiopulm Rehabil 1998 18(4) 283-289. 

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