Saturday, June 24, 2017

FENO in asthma: routine clinical testing

Hey Awesomites

One of the additional tests for determining the present status of airways in asthmatics is the measurement of Fraction of Nitric Oxide in Expired air (FENO).

The levels of Nitric oxide are elevated in the presence of inflammation in the airways, that is eosinophilic in nature.

In children <12 years, normal FENO is usually less than 36 ppb. However, in case of allergic inflammation of airways, the levels rise to >50 ppb.

Note that FENO is not diagnostic, but a test for independent prediction of exacerbations in asthmatic patients and is now done routinely in clinical practice, as approved by US- FDA.

Thats all
- Jaskunwar Singh

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