Efficacy of sildenafil in persistent pulmonary hypertension of the newborn.

Objective: To find out efficacy of sildenafil for the treatment of persistent pulmonary hypertension of the newborn (PPHN). Study Design: Observational study. Setting: Department of Neonatology, Sughra Shafi Medical Complex, Sahara Medical College, Narowal. Period: May 2020 to April 2021. Material & Methods: A total of 22 neonates of both genders with diagnosis of PPHN were enrolled during the study period. Demographic characteristic along with information about perinatal and postnatal characteristics were recorded among all neonates at the time of admission. X-ray chest were asked. Oral sildenafil was administered as 2mg/kg per dose thrice a day to all study cases and continued till extubation. Outcome was recorded on the basis of difference in FiO2 need after initiating sildenafil, time required to get ventilator off or mortality. Results: Out of a total of 22 neonates, 13 (59.1%) were male. Majority of the neonates, 15 (68.2%) were term newborns. Mode of delivery was lower segment cesarean section in 17 (77.3%) cases. APGAR score at 5 minutes was between 7 to 10 in 13 (59.1%) newborns. There were 13 (59.1%) newborns who required immediate resuscitation following birth. Meconium aspiration syndrome was the commonest associated condition found among 8 (36.4%) neonates. As per echocardiographic findings, 13 (59.1%) neonates had severe PPHN, 5 (22.7%) moderate and 4 (18.2%) mild. Mean oxygenation index at the time of admission was noted to be 46+14. Inotropic support was administered to 19 (86.4%) cases. Mean length of neonatal intensive care unit was 15+5 days. Mortality was reported among 10 (45.4%) neonates. Conclusion: Oral sildenafil was found to be a promising option for the treatment of neonates having PPHN. Oral sildenafil was found to successfully improve oxygenation among neonates having PPHN.