Stay Informed. Stay Healthy
Pulmonary function tests (PFTs) are a group of tests that measure and assess the lungs’ functioning. Aids in monitoring the quality and quantity of air used in respiration. Determines how a patient is responding to the treatment or how well his or her lungs are working before undergoing any surgery.
WHY IS THE PFT (PULMONARY FUNCTION TEST) DONE?
The doctor may order PFT in the following circumstances:
HOW TO PREPARE FOR PULMONARY FUNCTION TESTS (PFT)?
WHAT HAPPENS DURING THE PFT (PULMONARY FUNCTION TEST)?
Spirometry measures the amount of air one breathes. Patient sits in front of the machine and is fitted with a mouthpiece.The respiratory technologist guides his or her breathing pattern. The patient could also be asked to breathe in a medication to open the airways. The patient repeats breathing into the machine under observation.
Plethysmography measures the volume of gas in the lungs (lung volume). Patient sits or stands in a small booth and breathes into the mouthpiece. The doctor can work out the lung volume through measuring pressure in the booth.
Diffusion Capacity Test evaluates how well the lungs are able to transfer oxygen and carbon dioxide to and fro from the bloodstream. Patient is asked to breathe in certain gases like oxygen, helium, carbon dioxide or the tracer gas.
AFTER THE TEST
This test is approx 1 hour long and mostly safe. However, as it may require one to breathe in and out quickly, a patient might feel dizzy and there’s a chance of fainting.
Being an asthma patient, PFT may induce an asthma attack or result in lightheadedness. While In very rare cases, it might result in a collapsed lung.