Figure 5.

Systemic and pulmonary arterial mean pressures in term 21% oxygen (A), preterm 100% oxygen (B), preterm titrated oxygen (C) and preterm 21% oxygen (D). A) Black and gray triangles represent the mean systemic and mean pulmonary arterial pressures in term lambs ventilated with 21% inspired oxygen (controls). B) Black and gray squares represent the mean systemic and mean pulmonary arterial pressures in preterm lambs resuscitated with 100% oxygen. C) Black and gray circles represent the mean systemic and mean pulmonary arterial pressures in preterm lambs resuscitated with oxygen titrated to achieve target SpO₂. D) Open black and gray diamonds represent the mean systemic and mean pulmonary arterial pressures in preterm lambs resuscitated with 21% inspired oxygen concentration. * p<0.001 by ANOVA – the difference between systemic and pulmonary pressures.