upper gastrointestinal endoscope; EGD scope
Refers to the instrument itself, used for examining the upper digestive tract.
We introduced a new upper gastrointestinal endoscope.
esophagogastroduodenoscopy; upper GI endoscopy
Refers to the procedure itself, also called EGD or upper GI endoscopy.
I am scheduled to undergo an upper GI endoscopy tomorrow.
Compound of 上部 (upper), 消化管 (digestive tract), and 内視鏡 (endoscope).