Spirometry is a noninvasive medical test the patient is asked to take the deepest breath they can, and then exhale into the sensor as hard as possible, for as long as possible.

- Enter the test in good general state if the doctor does not stated otherwise

- Avoid smoking cigarettes at least 24 hours before the test (or 2 hours if there is a difficulty)

- Avoid physical effort

- Wear loose clothing that won't interfere with your ability to take a deep breath.

- Avoid eating a large meal before your test, so it will be easier to breathe, avoid strong coffee, fizzy drinks 2 hours before the test

- You should tell your doctor about any medications you’re taking

Contraindications:

- Have had a recent heart attack or stroke

- Have had aneurysm brain artery or thoracic aortic

- High blood pressure