More on Positive Airway Pressure Support

Intraocular Pressure during Continuous Positive Airway Pressure

Bilevel Positive Airway Pressure Ventilation

Over the past few decades, invasive positive pressure ventilation, usually applied via an endotracheal tube, has been the standard treatment for acute respiratory failure [1–3]. However, intubation and mechanical ventilation is associated with significant morbidity, including upper airway trauma and infections [4–7]; indeed, it is the single most important predisposing factor for nosocomial pne...

Oxygen cost of breathing in postoperative patients. Pressure support ventilation vs continuous positive airway pressure.

In seven postoperative patients with normal preoperative pulmonary function tests, we evaluated the oxygen cost of breathing (VO2resp) during continuous positive pressure ventilation (CPAP) and during a 15 cm H2O inspiratory pressure support ventilation (IPSV). For both periods, VO2 resp was estimated as the difference between total oxygen uptake of the period (VO2tot), measured by a mass-spect...

Pressure support compensation for inspiratory work due to endotracheal tubes and demand continuous positive airway pressure.

We evaluated the use of pressure support to compensate for the added inspiratory work of breathing due to the resistances of endotracheal tubes and a ventilator demand-valve system for continuous positive airway pressure (CPAP). A mechanical model was used to simulate spontaneous breathing at five respiratory rates through 7-mm, 8-mm, and 9-mm endotracheal tubes with and without a ventilator de...

Lung Recruitment Can Improve Oxygenation in Patients Ventilated in Continuous Positive Airway Pressure/Pressure Support Mode

BACKGROUND Recruitment maneuvers are often used in critical care patients with hypoxemic respiratory failure. Although continuous positive airway pressure/pressure support (CPAP/PS) ventilation is a frequently used approach, but whether lung recruitment also improves oxygenation in spontaneously breathing patients has not been investigated yet. The primary objective was to analyze the effect of...