3 Secondly, pressure support ventilation (PSV)-a mode of mechanical ventilation whose primary goal is to unload the patient's respiratory muscles 4-became widely popular and was increasingly used in the intensive care unit (ICU), so reduction of the patient's inspiratory effort and work of breathing (WOB) became a major goal of mechanical ventilation and one of the most frequent reasons for instituting ventilatory support. Firstly, a growing amount of research indicated that respiratory muscle malfunction, overload, or “fatigue” had a pivotal role in the pathophysiology of acute respiratory failure. 2 In the 1980s two factors contributed substantially to a change in this conventional attitude. 1 For many years frequent measurement of arterial blood gas tensions has been the only physiological evaluation in these patients and the chief guide to setting the mode and pattern of ventilatory assistance. The most important reason for starting mechanical ventilation is usually to restore pulmonary gas exchange in patients with acute respiratory failure in order to reverse life threatening hypoxaemia and/or progressive respiratory acidosis. NPPV, non-invasive positive pressure ventilation.CPAP, continuous positive airway pressure.
0 Comments
Leave a Reply. |