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Published on: August 4, 2021
Adjunct pharmacotherapy in acute lung disease in children
1Acute and Critical Care Programs, Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada. nkissoon@cw.bc.ca
Insights
Adjunctive therapies like inhaled nitric oxide, heliox, and surfactant may reduce mechanical ventilation risks in critically ill children. However, limited studies and varied conditions yield mixed results, hindering firm recommendations.
Area of Science:
- Pediatric Critical Care Medicine
- Respiratory Physiology
- Neonatology
Background:
- Mechanical ventilation is crucial for pediatric respiratory failure but carries significant risks.
- Newer ventilation strategies aim to reduce lung injury, yet adjunctive therapies are explored to further mitigate stressors.
- Inhaled nitric oxide, heliox, and surfactant are among therapies with theoretical benefits.
Purpose of the Study:
- To review the evidence and potential benefits of adjunctive therapies in pediatric mechanical ventilation.
- To assess the role of inhaled nitric oxide, heliox, and surfactant in reducing mechanical ventilation-related morbidity and mortality.
- To identify limitations in current research and reasons for a paucity of firm recommendations.
Main Methods:
- Review of existing literature on adjunctive therapies for mechanical ventilation in pediatric patients.
- Analysis of physiological rationale and clinical study findings for inhaled nitric oxide, heliox, and surfactant.
- Evaluation of study limitations, including small sample sizes and diverse pulmonary pathologies.
Main Results:
- Inhaled nitric oxide shows promise for newborns with hypoxemic respiratory failure and pulmonary hypertension.
- Surfactant is beneficial for respiratory distress syndrome in preterm neonates.
- Heliox may aid in severe upper airway obstruction, but results are mixed for other conditions.
Conclusions:
- Adjunctive therapies have demonstrated specific benefits in certain pediatric respiratory conditions.
- Small study sizes and varied patient populations limit definitive conclusions and broad recommendations.
- Further well-designed research is needed to establish the efficacy of these therapies across a wider range of respiratory diseases.
Abstract:
Mechanical ventilation, while accepted as standard therapy for critically ill infants and children with respiratory failure, has significant morbidity and mortality. While recent emphasis on low tidal volume ventilation and low airway pressures may result in decreased lung stretch and limit lung disease, adjunctive therapies have been tried to reduce the stressors of mechanical ventilation. Therapies included inhaled nitric oxide, heliox and surfactant. There are compelling physiological reasons why these drugs may be of benefit in these patients. However, our understanding of their role is hindered by studies with small numbers of patients and its use in diseases with varied pulmonary pathology. Studies have shown potential for benefit of inhaled nitric oxide in newborns with hypoxemic respiratory failure and pulmonary hypertension, surfactant in respiratory distress syndrome in preterm neonates and heliox in severe upper airway obstruction. However, the use in other respiratory conditions has led to mixed results and hence paucity of firm recommendations.
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