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What is Which of the following circumstances trigger non invasive to invasive ventilation and explain in detail?
Circumstances in which non invasive positive pressure ventilation should be changed to invasive ventilation Resp arrest Rr > 35/min Sev dyspnea with use of accessory muscles and possibly paradoxical breathing Life threatening hypoxemia PaO2 <40 mm hg Or PaO2/FiO2 <200 Sev acidosis (pH <7.25 ) and hyperapnia (PaCO2 >60 mm hg ) Hypersomnolence , impaired mental status Cardiovascular complication Failure of non invasive positive pressure ventilation Other circumstances (e.g metabolic abnormalities ,sepsis , pneumonia , pulmonary embolism , barotrauma, massive pleural effusion )