Endoscopy is a medical procedure that allows a doctor to observe the inside of the body without performing major surgery. An endoscope (fibrescope) is a long flexible tube with a lens at one end and a video camera at the other.
The endoscope camera is very slim and slippery and will slide pass the throat into the food pipe (oesophagus) easily without any blockage to the airways or choking. There is no obstruction to breathing during the procedure, and patients breathe normally throughout the examination.
All endoscopic procedures involve some degree of sedation, which relaxes you and subdues your gag reflex. Being sedated during the procedure will put you into a moderate to deep sleep, so you will not feel any discomfort when the endoscope is inserted through the mouth and into the stomach.