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Case study: Pediatrics, Management

Using FeNO to Adjust Asthma Treatment in a Child

A young girl continued to experience asthma symptoms despite being on an inhaled corticosteroid (ICS). FeNO testing revealed ongoing inflammation, leading to an adjustment in her treatment plan.

Last updated: September 2026

Patient profile

Gender/Age: Female under 12 years old
History: Four courses of prednisolone in the past two years, regular use of ICS with good adherence and inhaler technique

Symptoms

  • Frequent asthma attacks
  • Limited participation in physical activities
  • Frequent school absences

Management Approach:

Despite good medication adherence and proper inhaler use, the patient continued to experience symptoms. Her parents were hesitant to increase her medication without a clearer understanding of her condition.

FeNO Test:Elevated levels, indicating ongoing eosinophilic airway inflammation despite current treatment

Treatment Plan:

Inhaled Corticosteroid (ICS): Based on the elevated FeNO levels, her inhaled corticosteroid dose was increased.
Asthma Action Plan: The patient received a personalised asthma action plan and education on managing symptoms and handling emergencies.

Outcome:

  • Within two weeks, the patient’s symptoms improved significantly. She experienced fewer asthma attacks, her school attendance increased, and she was able to participate in sports.

Clinical Takeaway:

FeNO testing uncovered persistent inflammation which allowed for an appropriate adjustment in treatment, leading to better asthma control and an improved quality of life.

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