Patterns and Outcomes of Epoprostenol Use in Infants with Congenital Diaphragmatic Hernia Requiring Extracorporeal Life Support.

Objective: To describe our experience utilizing epoprostenol for pulmonary hypertension (PH) in infants with congenital diaphragmatic hernia (CDH) requiring extracorporeal life support (ECLS).

Study Design: We retrospectively reviewed infants diagnosed with CDH who required ECLS at our institution from 2013 to 2023. Data collected included demographics, disease characteristics, medication administration patterns, and hospital outcomes. We first compared infants who received intravenous epoprostenol and those who did not. Among infants who received epoprostenol, we compared survivors and nonsurvivors. χ² test/Fisher's exact and Mann-Whitney tests were used, with significance defined at P < .05.

Results: Fifty-seven infants were included; 40 (70.2%) received epoprostenol. Infants receiving epoprostenol had lower observed/expected total fetal lung volume (O/E TFLV) on magnetic resonance imaging (20 vs 26.2%, P = .042) as well as higher prenatal frequency of liver-up (90 vs 64.7%, P = .023) and "severe" classification (67.5 vs 35.3%, P = .007). Survival with and without epoprostenol was comparable (60% vs 64%, P = .23). Of those receiving epoprostenol, both survivors and nonsurvivors had similar prenatal indicators of disease severity. Most (80%) of hernia defects were classified as type C/D and 68% were repaired <72 hours after ECLS cannulation. The median age at initiation of epoprostenol was day of life 6 (IQR: 4, 7) in survivors and 8 (IQR: 7, 16) in nonsurvivors (P = .012). Survivors had shorter ECLS duration (11 vs 20 days, P = .049). Of nonsurvivors, refractory PH was the cause of death for 13 infants (81%).

Conclusions: In infants with CDH requiring ECLS, addition of epoprostenol appears promising and earlier initiation may affect survival.