FeNO: exhaled nitric oxide fraction; PBB: protracted bacterial bronchitis; TB: tuberculosis; CF: cystic fibrosis; PCD: primary ciliary dyskinesia.
* Specific cough pointers include[1]:Refer to UpToDate content on chronic cough in children.
¶ Habit cough (also known as tic cough) is typically absent at night or when distracted and may be honking or short/dry[2].
Δ FeNO value ≥25 ppb with asthma symptoms supports a diagnosis of asthma[3].
◊ For diagnostic evaluation, refer to UpToDate content on pertussis and tracheomalacia. Tic (habit) cough is diagnosed based on characteristic symptoms.Do you want to add Medilib to your home screen?