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A Novel Inhalation Mask System to Deliver High Concentrations of Nitric Oxide Gas in Spontaneously Breathing Subjects
Published on: May 4, 2021
Exhaled nitric oxide in stable chronic obstructive pulmonary disease
Mohammed F S Beg1, Mohammad A Alzoghaibi, Abdullah A Abba
1Department of Physiology, King Saud University and King Khalid University Hospital, Riyadh, Saudi Arabia.
Annals of Thoracic Medicine
|June 30, 2009
Summary
Fraction of exhaled nitric oxide (FENO) is elevated in stable chronic obstructive pulmonary disease (COPD) patients compared to controls, but less so than in asthmatics. Clinical utility is limited by overlap with control values.
Area of Science:
- Pulmonology
- Respiratory Medicine
- Biomarkers
Background:
- Chronic Obstructive Pulmonary Disease (COPD) and asthma are distinct respiratory conditions.
- Fraction of exhaled nitric oxide (FENO) is a non-invasive marker of airway inflammation.
- Understanding FENO levels in COPD is crucial for differential diagnosis and management.
Purpose of the Study:
- To investigate elevated fraction of exhaled nitric oxide (FENO) in stable, non-smoking COPD patients.
- To compare FENO levels in COPD patients with those in asthma patients and healthy controls.
- To assess the potential clinical utility of FENO in differentiating COPD.
Main Methods:
- A cross-sectional study design was employed.
- FENO was measured using online chemiluminescence with a single-breath technique.
- Participants included non-smoking, stable COPD patients, steroid-naïve asthmatics, and control subjects.
Main Results:
- COPD patients exhibited significantly higher FENO levels than controls (P=0.0001).
- FENO levels in COPD patients were lower than in asthmatic subjects (P=0.0285).
- A significant overlap in FENO values was observed between COPD and control groups, and FENO correlated inversely with FEV1/FVC ratio.
Conclusions:
- Stable COPD is associated with significantly elevated FENO, though less pronounced than in asthma.
- The substantial overlap between COPD and control FENO values may limit its clinical application for diagnosis.
- FENO may serve as a biomarker but requires careful interpretation in the context of other clinical findings.
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