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Exhaled nitric oxide predicts asthma exacerbation.
Michelle S Harkins1, Karen-Lynn Fiato, Gary K Iwamoto
1Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico, USA. mharkins@salud.unm.edu
Summary
Fraction of exhaled nitric oxide (FeNO) can predict asthma exacerbations. Higher FeNO levels in asthmatics indicate a greater risk of future asthma attacks, proving FeNO
Area of Science:
- Pulmonary Medicine
- Allergy and Immunology
- Respiratory Health
Background:
- Fraction of exhaled nitric oxide (FeNO) is elevated in asthma patients.
- FeNO correlates with other airway inflammation markers.
- Asthma exacerbations significantly impact patient quality of life.
Purpose of the Study:
- To evaluate the clinical utility of routine FeNO monitoring.
- To compare FeNO's predictive ability for asthma exacerbations against standard measures.
- To assess FeNO's role in managing moderate to severe persistent asthma.
Main Methods:
- Convenience sample of 22 adult asthma patients.
- Evaluation at a routine clinic visit.
- Monitoring for asthma exacerbations within 2 weeks post-evaluation.
Main Results:
- Patients with exacerbations had significantly higher mean FeNO (29.67 ppb) than those without (12.92 ppb).
- FeNO was the sole significant predictor of asthma exacerbation in logistic regression analysis (p=0.03).
- Standard measures like spirometry, peak flows, quality of life, medication, and symptoms were not significant predictors in this cohort.
Conclusions:
- FeNO is a clinically useful tool for assessing asthma control.
- Routine FeNO monitoring can help predict future asthma exacerbations.
- FeNO offers a valuable non-invasive method for disease management in asthmatics.