Lung Function Tests (LFTs) are also known as Breathing Tests, or Pulmonary Function Tests (PFTs). Doctors and nurses may request lung function tests for many different reasons:
Lung Function Tests can comprise of one test that you have to repeat 3-8 times, and so may only take up to 15 minutes which means they can take over a hour to complete. This really depends on the reason you are having the tests. You should be given all the information you need when you receive your appointment.