2. Lung function tests
Patients are required to take a deep breath and then blow into a machine which measures the amount of air exhaled and the speed at which it’s exhaled. This helps doctors picture the level of lung damage.
MORE: Educate Your Lungs to Improve Your Breathing
3. Blood tests
Patients are asked to provide blood samples to check the levels of oxygen in the bloodstream and to see if there are any infections present. The levels of carbon dioxide and oxygen in a patient’s bloodstream can also be measured using an arterial blood gas test.
