Special instrument used to view the above structure during an egd?

The special instrument used to view the esophagus, stomach, and duodenum during an esophagogastroduodenoscopy (EGD) is called an endoscope. This flexible, tube-like instrument is equipped with a light and camera, allowing physicians to visualize and assess the mucosal lining of these structures for abnormalities or diseases. Additionally, the endoscope may be used to perform minor procedures, such as biopsies or the removal of polyps.