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Exhaled breath measures of inflammation: are they useful in neonatal chronic lung disease?
1Department of Pediatrics, Mercy Hospital for Women, Clarendon St, East Melbourne, Victoria 3002, Australia.
Insights
Inflammation contributes to lung injury in premature infants. This review examines non-invasive exhaled breath tests for monitoring pulmonary inflammation in premature newborns, highlighting their potential and need for validation.
Area of Science:
- Neonatal Medicine
- Pulmonary Medicine
- Biomarkers
Background:
- Neonatal chronic lung disease is a significant issue in extremely premature infants.
- Inflammation is a key factor amplifying lung injury in premature lungs.
- Current methods for assessing pulmonary inflammation are invasive, with tracheal fluid analysis as the gold standard.
Purpose of the Study:
- To review non-invasive exhaled breath measures for assessing pulmonary inflammation in ventilated premature newborns.
- To discuss sample collection, analysis, and potential pitfalls of these methods.
- To evaluate their clinical applicability for infants at risk of chronic lung disease.
Main Methods:
- Review of available literature on exhaled breath measures.
- Focus on nitric oxide, carbon monoxide, volatile hydrocarbons, and exhaled breath condensate.
- Consideration of application in ventilated premature neonates.
Main Results:
- Exhaled breath measures offer a non-invasive alternative to current invasive methods.
- Specific markers like nitric oxide and volatile hydrocarbons show potential for monitoring inflammation.
- Challenges include standardization of sample collection and analysis for this vulnerable population.
Conclusions:
- Exhaled breath analysis holds promise for monitoring pulmonary inflammation in premature infants.
- Thorough validation of these non-invasive techniques is crucial before widespread clinical adoption.
- Further research is needed to optimize methods for the specific needs of ventilated premature newborns.
Abstract:
Neonatal chronic lung disease is a common problem for surviving infants of extreme prematurity. Although the precise pathophysiology is still not known, it is clear that inflammation provides a common link that amplifies the injury to the premature lung. Current invasive measures of pulmonary inflammation include markers in blood and airway effluent, with the cellular composition of tracheal fluid being the "gold standard". In this article available exhaled breath measures, particularly nitric oxide, carbon monoxide, volatile hydrocarbons, and exhaled breath condensate, are reviewed with particular reference to sample collection, analysis, and common pitfalls as they apply to the ventilated premature newborn at risk of chronic lung disease. Although they have great potential, all measures require thorough validation before being used clinically.
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