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Postnatal Steroids in Preterm Infants: A Narrative Review Series-Part 1: Inflammatory Modulation and Respiratory
Phoenix Plessas-Azurduy1, Anie Lapointe2, Punnanee Wutthigate3
1Division of Clinical & Translational Research, Faculty of Medicine and Health Sciences, McGill University, Montreal Children's Hospital, Montréal, QC H4A 3H9, Canada.
Insights
Postnatal corticosteroids aid extremely preterm infants by reducing lung inflammation and improving breathing support. Judicious use of late, low-dose dexamethasone is recommended, while early steroid use remains experimental.
Area of Science:
- Neonatal Medicine
- Pediatric Pulmonology
- Pharmacology
Background:
- Extremely preterm infants face high risks of lung injury and bronchopulmonary dysplasia (BPD) due to immature lungs requiring prolonged respiratory support.
- Systemic postnatal corticosteroids are frequently used to manage lung inflammation and facilitate extubation in these vulnerable infants.
- Current clinical practice shows significant variation in corticosteroid therapy timing, agent choice, and dosage, stemming from limited evidence and understanding of their effects.
Purpose of the Study:
- To review current knowledge on the inflammatory and respiratory effects of postnatal corticosteroids in extremely preterm infants.
- To explore how corticosteroids impact pulmonary inflammation, lung development, and clinical outcomes like extubation success and BPD severity.
- To examine evolving administration strategies and the need for individualized approaches based on patient-specific factors.
Main Methods:
- Narrative review integrating current research on postnatal corticosteroid therapy in extremely preterm infants.
- Analysis of randomized controlled trials to compare efficacy and side-effect profiles of common corticosteroid regimens.
- Discussion of mechanistic insights, clinical evidence, and emerging monitoring tools for optimizing therapy.
Main Results:
- Current evidence supports the judicious use of late, low-dose dexamethasone for managing respiratory issues in extremely preterm infants.
- Early prophylactic use of inhaled or intratracheal steroids is considered experimental and not routinely advised.
- Individualized corticosteroid strategies, informed by developmental and disease-specific factors, are crucial for balancing benefits and risks.
Conclusions:
- A nuanced, individualized approach to postnatal corticosteroid therapy is supported by synthesizing mechanistic and clinical evidence.
- Optimizing corticosteroid use requires careful patient selection and timing, potentially enhanced by domain-specific monitoring tools.
- Balancing the therapeutic benefits of corticosteroids against potential systemic trade-offs is essential for improving outcomes in extremely preterm infants.
Abstract:
Extremely preterm infants often require prolonged respiratory support due to lung immaturity and inflammation, placing them at high risk of lung injury and development of bronchopulmonary dysplasia (BPD). In many of these infants, systemic postnatal corticosteroids are used to reduce lung inflammation, facilitate mechanical ventilation (MV) weaning and extubation, and improve short-term pulmonary outcomes. However, despite decades of clinical use, substantial variation persists in timing, choice of agent and dosing. These inconsistencies reflect a lack of strong evidence and a limited understanding of the systemic and organ-specific effects of therapy for a highly heterogenous population usually exposed to this medication. This narrative review addresses these gaps by integrating current knowledge of the inflammatory and respiratory effects of postnatal corticosteroids in extremely preterm infants. We explore how corticosteroids modulate pulmonary inflammation, their effects on lung development, and how they affect key clinical outcomes such as extubation success and BPD severity. We also examine evolving approaches to corticosteroid administration and dosing, highlighting the importance of individualized strategies informed by developmental and disease-specific considerations. Comparative data from randomized controlled trials are reviewed, including the efficacy and side-effect profiles of commonly used regimens. Current evidence supports judicious use of late low-dose dexamethasone, while early prophylaxis with inhaled or intratracheal steroids remains experimental and is not routinely advised. In line with a physiology-driven approach, we also discuss emerging domain-specific monitoring tools that may enhance patient selection and optimize timing of intervention. By synthesizing mechanistic insights with clinical evidence, this review supports a more nuanced, individualized approach to postnatal corticosteroid therapy in extremely preterm infants, balancing therapeutic benefits with potential systemic trade-offs.
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