What is the main purpose of performing a pulmonary function test?

The primary purpose of performing a pulmonary function test is to assess the function and capacity of the lungs. These tests provide valuable information regarding how well the lungs are working by measuring airflow, lung volume, and the efficiency of gas exchange. This assessment helps in diagnosing various conditions such as asthma, chronic obstructive pulmonary disease (COPD), and restrictive lung disease among others.

Pulmonary function tests can reveal how much air a person can breathe in and out, as well as how quickly air can flow in and out of the lungs. This information is crucial for determining the severity and nature of respiratory conditions, guiding treatment decisions, and monitoring the effectiveness of therapies.

While some tests within the respiratory evaluation may relate to lung infections, cancer detection, or blood oxygen levels, the primary focus of pulmonary function tests is specifically to evaluate lung function and capacity.