Following surfactant administration,the infant initially improves clinically. Six hours later,IMV settings are PIP 26,PEEP 5,Rate 60, Ti0.4,Fi0235%. There is excellent chest movement and breath sounds are equal on auscultation,with scattered coarse crackles. Following surfactant administration, the infant initially improves clinically. Six hours later, IMV settings are PIP 26, PEEP 5, Rate 60, Ti 0.4, FiO2 35%. There is excellent chest movement and breath sounds are equal on auscultation, with scattered coarse crackles