What is the procedure known as EGD primarily used for?

The procedure known as EGD, or esophagogastroduodenoscopy, is primarily used to visualize the esophagus, stomach, and duodenum. This is accomplished by inserting a flexible tube with a camera (endoscope) through the mouth and into the upper gastrointestinal tract. EGD allows healthcare providers to examine these areas for abnormalities, such as ulcers, tumors, inflammation, and other gastrointestinal disorders. This procedure also enables the physician to take biopsies or perform certain treatments if needed during the examination, further enhancing its clinical utility.

The options related to taking blood samples, treating respiratory issues, or performing gastrointestinal surgeries do not accurately reflect the primary function of EGD, which focuses specifically on direct visualization and assessment of the upper gastrointestinal tract.