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[Therapeutic strategy and clinical outcome in congenital diaphragmatic hernia]
T Kato1, H Yoshino, T Hebiguchi
1Department of Pediatric Surgery, Akita University School of Medicine, Japan.
Insights
Congenital diaphragmatic hernia (CDH) has a high mortality rate, often due to pulmonary hypoplasia. Early indicators like Oxygen Index (OI) > 40% predict poor outcomes, suggesting prenatal surgery for severe cases.
Area of Science:
- Neonatal surgery
- Pediatric pulmonology
- Critical care medicine
Context:
- Congenital diaphragmatic hernia (CDH) presents a significant challenge in neonatal care, with high mortality rates primarily linked to severe pulmonary hypoplasia.
- Historically, CDH management has faced limitations, especially in neonates diagnosed within the first 24 hours of life.
Purpose:
- To evaluate the mortality rate and identify predictors of poor outcomes in neonates with CDH treated at a single institute.
- To assess the efficacy of different treatment strategies, including ventilatory support, pharmacological therapies, surgical repair, and extracorporeal membrane oxygenation (ECMO).
Summary:
- This study analyzed 37 neonates with CDH, reporting a 30% mortality rate, with most deaths attributed to pulmonary hypoplasia.
- Patients responding to initial treatments and undergoing surgery had a high survival rate (25/26).
- An Oxygen Index (OI) of 40% or higher on admission was identified as a reliable predictor of poor outcomes, with 100% sensitivity and 81% specificity, potentially serving as an ECMO entry criterion.
Impact:
- The findings highlight the critical role of OI as a prognostic marker in CDH management.
- The study suggests that prenatal surgical intervention, guided by accurate prenatal diagnosis, is essential for improving survival rates in neonates with severe pulmonary hypoplasia.
- This research underscores the need for advanced interventions like ECMO and emphasizes the importance of optimizing treatment strategies for CDH patients.
Abstract:
Congenital diaphragmatic hernia (CDH) continues to carry a high mortality rate 40%-60% mainly due to severe pulmonary hypoplasia. At our institute, thirty-seven neonates were treated for CDH diagnosed within the first 24 hours of life. Eleven of thirty-seven patients died and the mortality rate was 30%. Deaths in ten patients were due to severe pulmonary hypoplasia. The other one patient died from barotrauma at three months of age. All twenty-six patients who responded to ventilatory management and pharmacological therapies underwent surgical repair of CDH and all except one survived. Eight of eleven patients who did not respond to treatment also underwent surgery, but all died. These cases were all treated fufore ECMO introduction. Two of the other three in whom ECMO support was instituted died postoperatively. Among the parameters PH < 7, PaO2 < 60, PaCO2 > 60, AaDO2 > or = 600 and OI > or = 40 recorded on admission and examined retrospectively, OI > or = 40 was the most reliable as a predictor for poor outcome (sensitivity: 100%, specificity: 81%) and probably entry criteria for ECMO. The mean lung/body weight ratio of nonsurviving neonatal cases was as low as 0.49 +/- 0.18% while at least 1% is the critical value for survival. To salvage the CDH patient with severe pulmonary hypoplasia, surgical intervention before birth is inevitably necessary based on accurate prenatal diagnosis and established surgical techniques.
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