“Spirometry is a useful, accessible and well-performing tool, essential for the diagnosis and follow-up of many respiratory diseases, including asthma, which affects 10% of the child population. In addition, it is key to adjust medication appropriately and satisfactorily control the respiratory disease,” says Dr. Fatima Ortega, a pulmonologist at our clinic, who provides valuable information about this test.

What is spirometry?

Spirometry is a simple and painless test that evaluates lung function, allowing to objectively determine lung capacity (amount of air that the lungs can hold) and detect if there is any limitation, either by airway involvement, lung, or external causes to the thorax.

In which cases is it indicated in children?

Any child older than 6 years who presents persistent cough, respiratory distress (dyspnea) without established cause, or wheezing (whistling in the chest) should undergo spirometry to clarify and establish the diagnosis. It is also indicated in the follow-up of many respiratory diseases such as asthma, cystic fibrosis, bronchiectasis, among others.

How is spirometry performed in children?

• The child should blow air as hard as possible through a mouthpiece connected to a spirometer, which measures air volume.
• The child is asked to place the mouthpiece in the mouth, closing the lips around it. Then he/she should take a deep breath and blow as hard as possible to expel all the air from the lungs with maximum effort, quickly and for as long as possible.
• This effort is done a couple of times, before and after administering a bronchodilator.

What indications should be followed before spirometry is performed?

• Do not use bronchodilator drugs
• Avoid large meals. In the case of adolescents, avoid caffeine or alcohol intake.
• Avoid exercise
• Wear loose-fitting clothing

Once the spirometry has been performed, the patient will be able to carry out normal activities without restriction.

Dr. Fatima Ortega
Pulmonologist at Clínica Ricardo Palma