BACKGROUND Patients with advanced cystic fibrosis can benefit from non-invasive positive pressure ventilation (NPPV) for the treatment of acute decompensation as well as for the management of chronic respiratory failure. This study was undertaken to compare the physiological effects of non-invasive proportional assist ventilation (PAV) and pressure support ventilation (PSV) on ventilatory patte...

Sleep-disordered breathing (SDB) causes hypoxemia, negative intrathoracic pressure, and frequent arousal, contributing to increased cardiovascular disease mortality and morbidity. Obstructive sleep apnea syndrome (OSAS) is linked to hypertension, ischemic heart disease, and cardiac arrhythmias. Successful continuous positive airway pressure (CPAP) treatment has a beneficial effect on hypertensi...

A unique method of intermittent positive pressure ventilation of the lungs during general anaesthesia for bronchoscopy, which leaves the view and access of the endoscopist unhampered, has been described by Sanders (1967). A venturi effect is created at the open end of a Negus bronchoscope by passing oxygen at a pressure of 50 Lb./sq.in. through an 0.043-inch diameter nozzle. Sufficient pressure...