A

Alveoli (al-VEE-oh-lie)

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

D

Diffusing capacity tests

Measure how well gases are exchanged between the lungs and blood

DLCO (carbon monoxide diffusing capacity) test

Measures how carbon monoxide is exchanged by the lungs

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

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

IPF

Idiopathic pulmonary fibrosis

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