Measurement of Exhaled Nitric Oxide (NO) and Bronchial Provocation Test With Mannitol as a Predictor of Response to Inhaled Corticosteroids in Chronic Cough

"Bronchial provocation test with mannitol: Aridol is supplied in kit form containing sufficient capsules to complete one complete challenge, and the inhalation device.~1. Apply nose clip and subject should be directed to breathe through the mouth~2. Insert 0 mg capsule into inhalation device. Puncture capsule by depressing buttons on side of device slowly, and once only (a second puncture may fragment the capsules)~3. The patient should exhale completely, before inhaling from device in a controlled rapid deep inspiration~4. At the end of deep inspiration, start 60 second timer, subject should hold breath for 5 seconds and exhale through mouth before removal of nose clip~5. At the end of 60 seconds, measure the FEV1 in duplicate (this becomes baseline FEV1)~6. Insert 5 mg capsule into inhalation device, and proceed as above~7. Repeat steps 1 - 4 following the dose steps in the table below until the patient has a positive response or 635 mg has been administered."