Another 65 patients had normal levels of exhaled nitric oxide.

The patients had taken the exhaled nitric oxide test.

In the exhaled nitric oxide test, the patient breathes into a device four or five times over 10 minutes.

Hahn calls for further studies of the exhaled nitric oxide test in patients with chronic cough.

The exhaled nitric oxide test is "very accurate but rather underused," Hahn says.

Exhaled nitric oxide is a breath test that might signal airway inflammation such as in asthma.

Effect of inhaled L-arginine on exhaled nitric oxide in normal and asthmatic subjects.

Academic exam stress and depressive symptoms are associated with reductions in exhaled nitric oxide in healthy individuals.

In short, inhaled corticosteroids were only likely to help ease chronic cough in patients with high levels of exhaled nitric oxide.

Of those two tests, the exhaled nitric oxide test was better at predicting which chronic cough patients would be helped by inhaled corticosteroids, the study shows.

In medicine, exhaled nitric oxide (eNO) can be measured in a breath test for asthma or other conditions characterized by airway inflammation.

Hahn's team presented promising results for the exhaled nitric oxide test today at the 16th European Respiratory Society Congress, held in Munich, Germany.

There is significant interest in exhaled nitric oxide analysis in conjunction with EBC analysis but in addition, the analysis of the breath has many applications.

He also pioneered the use of non-invasive markers to monitor inflammation in the airways and particularly exhaled nitric oxide, which is increased in asthma and reduced by steroid therapy.

Researchers at the Mayo Clinic today reported that a test called the exhaled nitric oxide test, commonly used for asthma patients, can help predict which chronic cough patients would be helped by inhaled corticosteroids.

A recent study by Matsumoto [ 16] demonstrated that patients with decompensated liver cirrhosis had higher levels of exhaled nitric oxide than patients with compensated cirrhosis, chronic liver disease, or controls.

Because nitric oxide might serve as an inflammometer in conditions like asthma, there has been increasing interest in the use of exhaled nitric oxide as a breath test in diseases with airway inflammation.