“…Beyond this age, mortality rates increase dramatically. 27 Second, we modified the EOLIA criteria by limiting the period of maximal conventional therapy to 4 days or less during which the patient should have undergone a trial of proning, pulmonary vasodilator therapy (either nitric oxide or isoproterenol), and have received the gamut of conventional therapy, most important of which was intravenous steroids. If, however, there had been no improvement by day 4 despite maximal conventional therapy and the patient continued to exhibit a partial pressure of arterial oxygen/ fraction of inspired oxygen ratio of <80 for >6 hours or fraction of inspired oxygen ratio <50 for >3 hours, then we pivoted to urgent cannulation, to proffer protection from the further vagaries of barotrauma that almost universally accompany high ventilatory settings and maximal driving power.…”