During the test, the child exhales and the spirometer measures the airflow, comparing lung capacity to the normal range for the child's age and race.
Spirometry-A test using an instrument called a spirometer that measures how much and how fast the air is moving in and out of a patient's lungs.
If the diagnosis is still in doubt, the patient can inhale a suspect allergen while using a spirometer to detect airway narrowing.
The patient places a clip over the nose and breathes through the mouth into a tube connected to a machine called a spirometer.
The spirometer is similar to the peak flow meter that patients use to keep track of asthma severity at home.
Each inhalation is followed by measuring the exhalation capacity with a measuring tool called a spirometer.