Platelet thromboxane B2 production in neonatal pulmonary hypertension.

Production of platelet thromboxane B2, a stable metabolite of thromboxane A2, was measured in seven newborn infants with pulmonary hypertension during the first day of life. Platelet thromboxane B2 production was significantly lower than in 12 healthy controls but did not correlate with simultaneous blood gas values.