HomeMedicine & HealthDiagnostics & ImagingWhat is Spirometry?
Medicine & Health·2 min·Updated Mar 15, 2026

What is Spirometry?

Spirometry

Quick Answer

A test that measures how much air you can breathe in and out and how quickly you can do it is called spirometry. It helps doctors assess lung function and diagnose conditions like asthma and chronic obstructive pulmonary disease (COPD).

Overview

Spirometry is a common pulmonary function test that evaluates how well your lungs work. During the test, you breathe into a device called a spirometer, which measures the amount and speed of air you can inhale and exhale. This information helps doctors understand if your lungs are functioning properly or if there are any issues that need to be addressed. The test typically involves taking a deep breath and then exhaling as hard and fast as possible into the spirometer. The device records the volume of air and the flow rate, providing key measurements such as forced vital capacity (FVC) and forced expiratory volume in one second (FEV1). These measurements are crucial for diagnosing respiratory conditions and can be compared to normal values based on age, gender, and height. Spirometry is especially important in the field of diagnostics and imaging as it can help detect lung diseases early on, allowing for timely treatment. For example, a patient experiencing shortness of breath may undergo spirometry to determine if they have asthma or COPD. By identifying these conditions early, doctors can create effective management plans to improve patients' quality of life.


Frequently Asked Questions

Spirometry is useful for diagnosing conditions like asthma, chronic obstructive pulmonary disease (COPD), and other respiratory issues. It provides critical information about lung function that can indicate the presence of these diseases.
No, spirometry is a non-invasive and painless test. It simply requires you to breathe into a device, and while it may feel a bit uncomfortable to exhale forcefully, it does not cause pain.
The frequency of spirometry tests depends on individual health needs and any existing respiratory conditions. Doctors may recommend regular testing for patients with chronic lung diseases or those at risk to monitor their lung function over time.