A
    Alveoli (al-VEE-oh-lie)

    Tiny air sacs in the lungs where carbon dioxide leaves the bloodstream and oxygen enters the bloodstream

    D
    DLCO (carbon monoxide diffusing capacity) test

    Measures how carbon monoxide is exchanged by the lungs

    Diffusing capacity tests

    Measure how well gases are exchanged between the lungs and blood

    F
    Fibrosis (fie-BRO-sis)

    Formation of fibrous scar tissue

    G
    Gastroesophageal reflux disease, or GERD

    A regurgitation of stomach acids into the esophagus and throat, causing heartburn, acid indigestion, and possibly injury to the lining of the esophagus—also called acid reflux disease. Not all patients with GERD can feel the effects of acid reflux, even if it is occurring

    H
    HRCT (high-resolution computed tomography) or CT

    A type of x-ray that produces detailed images of the body, including the lungs

    Hypoxemia

    Having too little oxygen in the blood. Hypoxemia is measured by a test called pulse oximetry

    I
    IPF

    Idiopathic pulmonary fibrosis

    Idiopathic (id-ee-oh-PATH-ik)

    Of unknown cause

    Interstitial lung disease, or ILD

    A large group of lung disorders that cause inflammation and/or scarring (fibrosis) of interstitial lung tissue

    Interstitium

    The tissue between the pulmonary alveoli and blood vessels in the lungs

    P
    Pulmonary

    Relating to the lungs

    Pulmonologist

    A physician specializing in the lungs

    Pulse oximetry

    A non-invasive method for monitoring a patient’s blood oxygen saturation

    R
    Radiologist

    A physician specializing in using radiology tests (eg, x-rays) to diagnose illness

    Respiratory therapist

    A healthcare professional specializing in pulmonary treatment

    S
    Spirometry (spuh-ROM-uh-tree)

    A type of test that evaluates how air moves in and out of your lungs