Background: Neonates with critical congenital heart disease of the ductal-dependent pulmonary circulation type (CCHD-DDPC) require prostaglandin E1 (PGE1) to maintain oxygen saturation until surgery. However, the factors contributing to the maintenance doses of PGE1 remain unclear. This study aimed to determine the predictors of high maintenance PGE1 doses in these neonates.
Methods: This retrospective cohort study included neonates with CCHD-DDPC at Songklanagarind Hospital between January 1, 2006, and December 31, 2021. Factors associated with high maintenance PGE1 doses (> 0.01 mcg/kg/min) were analyzed to identify predictors. Odds ratios were calculated using tabulation and logistic regression analysis. A prediction score was developed for high maintenance PGE1 doses.
Results: Among 96 neonates with CCHD-DDPC, 55 % required high maintenance doses of PGE1. Three factors significantly associated with high maintenance PGE1 doses were patent ductus arteriosus (PDA) size-to-birthweight ratio ≤1.3 mm/kg, initial PGE1 dose >0.03 mcg/kg/min, and preoperative invasive mechanical ventilation. The area under the receiver operating characteristic curve for these three predictors was 0.7409. A predictive score of 0-3 was created based on these factors. The probabilities of receiving a high maintenance dose of PGE1 for patients with overall scores of 0, 1, 2, and 3 were 0.19 (95 % CI: 0.04-0.33), 0.42 (95 % CI: 0.30-0.54), 0.69 (95 % CI: 0.57-0.81), and 0.87 (95 % CI: 0.76-0.99), respectively.
Conclusions: In neonates with CCHD-DDPC, a PDA size-to-birth weight ratio ≤1.3 mm/kg, an initial dose of PGE1 > 0.03 mcg/kg/min, and preoperative invasive mechanical ventilation were predictors of high maintenance PGE1 doses during the preoperative period.
Keywords: Clinical decision rules; Congenital heart defect; Neonate; Patent ductus arteriosus; Synthetic prostaglandins E.
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