About this procedure
A bronchodilator response test begins with spirometry. The child then receives a bronchodilator under a defined protocol, and spirometry is repeated after an appropriate interval. The clinician compares the measurements to assess whether airflow has changed.
Why is this test used?
It may help when asthma or airflow obstruction is suspected, in children who wheeze, or when the reversibility of an abnormal result needs clarification. The result alone does not diagnose asthma. A limited response does not exclude every possible cause of symptoms.
Preparation and safety
A healthcare professional will explain preparation, contraindications and whether the schedule of prescribed inhalers needs adjustment. Never stop treatment on your own before testing. The investigation is used only when indicated and when the child can perform reliable spirometry.
Signs and symptoms
- Possible airway obstruction or asthma.
- Recurring wheeze and shortness of breath.
- Need to evaluate the reversibility of airflow changes on spirometry.
- Discrepancy between symptoms and previous lung-function measurements.
Diagnosis and tests
Measurements and trace quality before and after medication are compared. Interpretation takes account of age, reference values, technical quality and the clinical picture. This test alone cannot resolve every diagnostic question.
Care and treatment approaches
This is a diagnostic procedure, not a course of treatment. Results may help the clinician refine further investigations in the context of all available clinical information.
When to seek urgent care
A child with acute breathing difficulty or blue lips needs emergency help on 103 in Ukraine, not a routine bronchodilator test.
Frequently asked questions
Does a positive response always mean asthma?
No. The result supports clinical assessment but must be considered alongside medical history and other tests.
Should prescribed inhalers be stopped before testing?
Only if a healthcare professional provides specific instructions; do not change medication independently.
Can this test be performed during severe breathlessness?
No. Functional testing must not take the place of emergency care during a severe acute episode.
Important information
A medical consultation is needed for diagnosis and treatment recommendations.
Self-treatment can be harmful to your health.
