Exhaled nitric oxide (ENO) has been suggested as a marker of airway inflammation. This study aimed to evaluate the role of ENO in the investigation of chronic cough. We measured ENO in 38 adult patients reporting chronic cough, in 23 healthy control subjects, and in 44 asthmatics. In addition to the regular investigation, ENO was measured by a chemiluminescent analyzer using the restricted breath technique. In the chronic cough group, 30 were considered as nonasthmatic, whereas asthma was diagnosed in eight by a positive methacholine challenge.
Source: http://bx.businessweek.com/health-20/view?url=http%3A%2F%2Fwww.everydayheal th.com%2Fblogs%2Fasthma-management%2Fexhaled-nitric-oxide-as-a-noninvasive- assessment-of-chronic-cough-





