Fig. 14From: Assessing the impact of gestational age of donors on the efficacy of amniotic epithelial cell-derived extracellular vesicles in experimental bronchopulmonary dysplasiaChanges in pulmonary artery flow on 6-week-old mice (n = 6). (A) Representative images of pulmonary artery flow. (B) Changes of PAT/PET (pulmonary artery acceleration time/ejection time) ratio. Injury decreased the ratio of PAT/PET, which indicated the development of pulmonary hypertension. Both hAEC treatment and term EV treatment restored the ratio back to control level; however, preterm EV treatment group did not have significant changes. (**p < 0.01)Back to article page