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  • Title: Use of inhaled iloprost for the management of postoperative pulmonary hypertension in congenital heart surgery patients: review of a transition protocol.
    Author: Vorhies EE, Caruthers RL, Rosenberg H, Yu S, Gajarski RJ.
    Journal: Pediatr Cardiol; 2014 Dec; 35(8):1337-43. PubMed ID: 24872141.
    Abstract:
    Inhaled nitric oxide (iNO) is considered standard therapy for pediatric postcardiac surgical pulmonary hypertension (PH). Limited data suggest that inhaled iloprost (inIlo), an aerosolized prostacyclin, may be a feasible and more affordable therapeutic alternative. The goal of this study was to determine if significant hemodynamic change or adverse events would occur in postoperative congenital heart surgery (CHS) patients with PH after their transition from iNO to inIlo. This retrospective review investigated CHS patients with postoperative PH (mean pulmonary artery pressure [mPAP] >25 mmHg) between January 1, 2010 and December 31, 2011 who transitioned from iNO to inIlo. By protocol, CHS patients receiving stable doses of iNO were gradually transitioned to inIlo. After full transition, the patients received inIlo every 2 h, with a final dosing range of 1.25-5 μg/dose. Both PAP and systemic arterial pressure (SAP) were invasively measured during the transition period. Seven patients ages 10 days to 1.5 years completed the protocol. Measurements of mPAP (p = 0.27) and systolic PAP (p = 0.25) did not differ between iNO and inIlo therapy alone. No serious adverse events or complications (bleeding or thrombocytopenia) occurred. The ratio of systolic PAP to SAP decreased in all patients receiving inIlo alone (p = 0.03). Pulmonary hypertension in postoperative CHS patients can be managed successfully with inIlo, and the measured hemodynamics with this agent are similar to those observed with iNO. For the management of postoperative PH, inIlo may be a reasonable alternative, thus reducing the need for costly iNO. Larger confirmatory studies would more robustly facilitate its integration into standard care.
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