A gastroscopy is a procedure in which a lens with a probe is passed through a thin fiber optic tube into the digestive tract and then the stomach mucosa is viewed directly from the mirror. All gastroscopies require intubation; there is no such thing as an unintubated gastroscopy. If you want to do a related gastroscopy, there are painful and painless gastroscopies. Painless gastroscopy is a gastroscopy done under general anesthesia with no perception, so it is called painless gastroscopy. However, for normal gastroscopy, you can take oral anesthetic to make your throat feel slightly anesthetized before doing the gastroscopy, but you will feel uncomfortable when doing it. So if you need to do a gastroscopy, you will be intubated, and there is no intubation. If intubation is not acceptable, consider a barium meal gastrointestinal imaging.