Our body needs an adequate supply of oxygen in order to function smoothly. Pulse oximetry is a non-invasive diagnostic test to measure the level of oxygen in blood. The pulse oximeter is a device that looks like a clothespin that is clipped on your finger or ear to obtain a reading.
This test evaluates the amount of air that you can inhale and exhale, and the speed at which you can exhale the air out of your lungs. It is performed to diagnose chronic lung conditions. A spirometer is a device used for measuring lung function.
Pulmonary Function Testing (PFT)
Pulmonary function testing, also called spirometry or lung function test, measures your ability to breathe and how efficiently gas is exchanged between your lungs and the rest of your body.
Bronchoscopy is a diagnostic test that use a thin tube with a light source and camera attached at its tip (bronchoscope) to help the doctor inspect the respiratory tract (air passage) for problems. Bronchoscopy is used to diagnose problems in the lower respiratory track and lungs, including the vocal cords, wind pipe, and the large and small airways reaching the lungs (bronchi and bronchioles).