Optimistic strain ventilation any of various different types of mechanical ventilation in which gasoline is shipped to the airways and lungs underneath positive pressure, developing beneficial airway strain all through inspiration; it could be performed by means of both an endotracheal tube or perhaps a nasal mask. See also ventilator. https://ventilation-installation01223.blogunok.com/37710681/the-greatest-guide-to-ventilation-ductwork