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A comprehensive approach to the prevention of bronchopulmonary dysplasia
1Pediatric Pulmonary Unit, Department of Neonatology, Bnai Zion Medical Center, Technion, The B&R Rappaport Faculty of Medicine, Haifa, Israel. dramir@netvision.net.il
Insights
Preventing bronchopulmonary dysplasia (BPD) in extremely premature infants requires a comprehensive strategy combining ventilatory and non-ventilatory measures. No single intervention is sufficient; a multifaceted approach is crucial for managing this complex lung disease.
Area of Science:
- Neonatal Medicine
- Pediatric Pulmonology
- Respiratory Physiology
Background:
- Bronchopulmonary dysplasia (BPD) is a chronic lung disease affecting extremely premature infants, characterized by impaired lung maturation due to multiple prenatal and postnatal insults.
- The 'new BPD' phenotype presents with less severe respiratory distress syndrome (RDS) and is often associated with prenatal steroid use.
- The multifactorial nature of BPD pathophysiology necessitates a complex, integrated prevention strategy rather than a single solution.
Purpose of the Study:
- To review and discuss current ventilatory and non-ventilatory strategies for preventing bronchopulmonary dysplasia (BPD) in extremely premature infants.
- To evaluate the effectiveness of various respiratory support methods, including nasal continuous positive airway pressure (NCPAP), nasal intermittent positive pressure ventilation (NIPPV/SNIPPV), and the INSURE approach.
- To explore non-ventilatory measures such as nutritional support, caffeine, vitamin A, and the management of patent ductus arteriosus (PDA) in the context of BPD prevention.
Main Methods:
- Review of existing literature on BPD prevention strategies, focusing on both ventilatory and non-ventilatory interventions.
- Discussion of individualized endotracheal intubation, early lung recruitment techniques, and respiratory support goals during hospitalization.
- Analysis of the role of selective corticosteroid use, nutritional support, fluid restriction, caffeine, vitamin A, and PDA treatment in BPD management.
Main Results:
- Initial NCPAP treatment did not significantly reduce BPD rates compared to endotracheal ventilation and surfactant.
- NIPPV/SNIPPV may offer short-term benefits over NCPAP, but their long-term impact on BPD requires further investigation.
- While gentle ventilation and permissive hypercapnia show short-term advantages, they have not significantly reduced BPD rates. Selective, short-term, low-dose corticosteroids may benefit high-risk infants unable to wean from ventilation. PDA treatment has not been shown to decrease BPD.
Conclusions:
- A comprehensive, multi-faceted strategy combining ventilatory and non-ventilatory measures is essential for preventing BPD in extremely premature infants.
- Individualized respiratory support, early nutritional interventions, and judicious use of corticosteroids are key components of this strategy.
- Further large-scale randomized controlled trials and meta-analyses are needed to validate the efficacy of individual components and the overall strategy, particularly in the most vulnerable extremely premature population.
Abstract:
The current bronchopulmonary dysplasia (BPD) is seen in infants born extremely premature, with less severe respiratory distress syndrome (RDS) and who received prenatal steroids-"new BPD". The pathophysiology of BPD is based on an impairment of lung maturation with prenatal and postnatal multi-hit insults and genetic susceptibility. This multifactorial pathophysiology of BPD suggests that no single "magic bullet" will prevent it. Thus, to avoid BPD we need to implement a complex and comprehensive strategy. This strategy is based on ventilatory and non-ventilatory measures. The ventilatory route allows an individualized endotracheal intubation approach. Early lung recruitment with nasal respiratory support (nasal continuous positive airway pressure [NCPAP] or nasal intermittent positive pressure ventilation [NIPPV] / synchronized NIPPV [SNIPPV]) and the INSURE (intubation, surfactant and early extubation) approach are discussed. Initial treatment with NCPAP did not reduce the rate of BPD compared to endotracheal ventilation and surfactant administration. While NIPPV/SNIPPV may have short-term advantages over NCPAP, the effect on BPD needs to be further studied. During hospitalization the respiratory goals should aim for adequate oxygenation, permissive hypercapnia, and gentle ventilation. However, these goals were found to have short-term benefits but did not reduce significantly the rate of BPD. Selective use of a short course of low dose corticosteroids can be considered after the first or second week of life in infants who are unable to be weaned from the ventilator and are at high risk for BPD. Non-ventilatory measures include early nutritional support with fluid restriction, caffeine and consideration of vitamin A. Hemodynamic significant patent ductus arteriosus (PDA) may be associated with BPD, but medical or surgical treatment of PDA were not shown to decrease BPD. Each component and the strategy as a whole needs to be further studied in large randomized prospective studies or by meta-analyses, especially in the target population of extremely premature infants who are the most prone to BPD.
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