Speciality Services



Exhaled Nitric Oxide

Estimation of fractional nitric oxide (NO) concentration in the exhaled breath (FENO) is a quantitative and simple method of evaluating airway inflammation.

FENO gives the following information:

  • Diagnosis of eosinophilic airway inflammation
  • Corticosteroid responsiveness
  • Monitoring of treatment
  • Evaluating compliance

FENO < 25 ppb (20 ppb in children) is likely to be normal, values > 50 ppb (35 ppb in children) indicates likelihood of eosinophilia inflammation corticosteroid responsiveness. Values > 25 ppb < 50 ppb (20–35 ppb in children) should be interpreted as per the clinical setting.

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