Spirometry measures how much air a child can blow out and how fast. It is effort-dependent, so test quality is as important as the numbers.
Severe breathing difficulty, chest indrawing, blue lips, drowsiness, poor feeding, grunting, pauses in breathing, persistent fast breathing, low oxygen — these are not for online review. Go to in-person pediatric emergency care.
What parents usually notice.
- Doctor asks for lung function in asthma/recurrent cough
- Report shows FEV1, FVC, FEV1/FVC or reversibility
- Parent worries because report is normal but symptoms continue
- Child could not perform acceptable blows
Common reasons doctors think about.
- Asthma control assessment
- Airflow obstruction or response to bronchodilator
- Baseline monitoring in chronic lung disease
- Part of a bigger picture, not a standalone diagnosis
What a pediatric pulmonologist checks.
- Acceptability and repeatability of the test
- Height, age and reference equation
- Bronchodilator response when performed
- Whether FeNO/oscillometry or further tests are needed
What not to do blindly.
- Do not interpret a poor-quality report as normal/abnormal
- Do not ignore symptoms because one spirometry is normal
- Do not compare raw values across ages without reference context
- Do not panic from one number without clinical review
Related guides.
FeNO is a simple breath test that may add information about allergic-type airway inflammation in selected children with asthma-like symptoms....
Oscillometry can assess respiratory mechanics during quiet breathing and is useful when spirometry is difficult or when small-airway information may h...
Asthma is a repeating pattern of cough, wheeze, tightness, breathlessness, night symptoms, exercise symptoms, or recurrent “chest congestion.”...