Information about your examination
Gastroscopy is the preferred method for investigating symptoms related to conditions of the esophagus, stomach, or duodenum, as it allows for accurate diagnosis and confirmation through biopsy collection. It is a safe, painless, and quick procedure, typically lasting between 5 and 15 minutes. The passage of the gastroscope through the throat may trigger a gag reflex, but this is usually well managed with the help of medication.
You will be asked to remove any dentures, eyeglasses, and loosen your belt, then lie on the examination bed on your left side. A flexible intravenous (IV) catheter may be placed in your right arm and remain in place throughout the procedure, so that light sedation can be administered if needed. A small clip-like device may be placed on your finger to monitor your heart rate and blood oxygen levels during the procedure. Oxygen may also be given if necessary.
The doctor will spray a local anesthetic (lidocaine) on your throat and place a plastic mouthpiece between your teeth to protect the gastroscope from being bitten.
The gastroscope, coated with a lubricating gel, will then be gently inserted through the mouthpiece, into the back of the throat, and guided through the esophagus, stomach, and duodenum.
After a few minutes, the doctor will withdraw the scope and remove the mouthpiece.
How to prepare
No special preparation is required for this examination.