Oral sildenafil as a rescue therapy in presumed acute pulmonary hypertensive crisis.

A 23-week-old baby, born at 26(+2) weeks, presented to the hospital with critical respiratory failure, which was impossible to stabilize. She had unstable oxygen saturations between 35% and 95%. A presumptive diagnosis of bronchopulmonary dysplasia with associated pulmonary hypertensive crisis was made. In the absence of inhaled nitric oxide, 2 oral doses of 1 mg/kg sildenafil were given, with a dramatic improvement 30 to 45 minutes later. Her oxygenation index fell from 43 to 14. She made a full recovery and was discharged from the hospital 2 weeks later.