Endoscopy, as a term, is an imaging method for organs with lumen.
In practice, endoscopy is more often used to refer imaging the upper digestive tract (esophagus, stomach and small intestines). For this reason, esophagogastroduodenoscopy is a medical term synonym for endoscopy.

In endoscopy, a thin, flexible tube equipped with a camera, called the endoscope, is used. The endoscope is inserted into the oral cavity and advanced to the esophagus, stomach and small intestine, respectively. Meanwhile, the causes of symptoms possibly originating from the upper digestive system are investigated.

Why is this procedure done?

Endoscopy is performed to directly visualize the upper digestive tract of patients, who present with upper gastrointestinal complaints (abdominal pain, cramp, difficulty swallowing, changes in bowel habits, stomach ache and dyspepsia) and patients with suspicious findings on stool analyses, laboratory tests and X-rays.
While the upper digestive system is examined, the gastroenterologist investigates the causes of active complaint as well as other possible pathologies. As the case for colonoscopy, endoscopy also allows both diagnosis and treatment.

Possible abnormalities of the upper digestive tract include, but not limited to abnormalities that can cause difficulty swallowing, bleeding, ulcers, inflammation, abnormal tissue changes, foreign bodies, narrowing, and cancerous formations.


It is very rare to face a complication in endoscopic examination of the upper digestive tract and they are usually easily managed, even if they develop. Drug reactions and bleeding at biopsy site are the most common ones. The perforation of the digestive tract examined with endoscope is an extremely rare complication.

In the endoscopy room, any and all necessary instrument, equipment and other means to manage the possible risks and complications are available.
Our specialists will employ all practices to minimize the risk of complications and our doctors will inform you about risks listed above and all other potential complications and will address all your concerns before the procedure.


Presence of digested food in esophagus, stomach and in the first part of the small intestine will jeopardize the quality of the upper GI endoscopy.
Since endoscopy is an elective (planned) procedure, you will be asked to stop eating and drinking eight hours before the procedure.

At the preparation phase, you need to notify all prescription and over-the-counter medications that you take to manage diabetes mellitus, hypertension, high blood lipids and cholesterol as well as other diseases and all vitamin and mineral supplements to your doctor. Your doctor will instruct medications that you should stop taking by consulting you with other specialist of our hospitals. Or, dose of those medications can be modified.

Since you will be sedated during the procedure, you will need a family member or a friend to drive you home after the procedure is completed and it is confirmed that your general health is stabilized. If it is not possible, you can seek help from healthcare professionals regarding your transfer to home.

Surgery and early postoperative period

After preparations are completed, you will be transferred to the endoscopy room and be positioned on the procedure table.Your doctor will administer a sedative agent and thus, you will not feel the procedure. Sedative agents will help you relax and fall into a nap. Thus, the discomfort caused by the procedure will be minimized.

Your vital signs are checked throughout the procedure.Your throat is numbed as you may accidentally bite the endoscope and your oral cavity is injured. A spray is used for this purpose. Moreover, a rubber mouth guard is placed to keep your mouth open.

The endoscope is then advanced into the esophagus through the oral cavity. After mucosa of the esophagus is visualized, the structure and the tone of a circular muscular structure located between the distal end of the esophagus and the inlet of the stomach, called sphincter, is evaluated.

The endoscope is advanced to the stomach and the mucosa in all parts of the stomach (pylorus, antrum, corpus) is examined. If an ulcer is noted, it can biopsied or coagulated (burnt) with a device, called cautery. Or, some drugs are injected into and around the ulcer in order to form a scar tissue. If an abnormal growth of mucosa is seen, biopsy specimens can be collected before the lesion is completely removed.

Finally, the endoscope is advanced to the duodenum, the first part of the small intestines, and endoscopic examination terminates, after examination, diagnosis and treatment is completed. The endoscope is removed and you are observed in a room until effects of sedation wear off.Before you are discharged, your doctor may make dietary recommendations and prescribe medications. You should strictly follow instructions of your doctor in order to prevent risks and to maximize the comfort after the procedure.A family member or a friend should drive you home, as you are administered sedative agent. If it is not possible, you can seek help from healthcare professionals regarding the transportation.

Distension, frequently passing gas, mild throat ache and irritation are expected symptoms you may experience during and after an endoscopy. However, if you notice fever, shortness of breath, blood or black discoloration of stool and difficulty swallowing or feel insufferable abdominal pain, vomit and see blood in vomit, contact your doctor or visit the closest healthcare facility.


All findings identified in the endoscopic examination are compiled in a report. If a biopsy specimen is collected, it will be examined in pathology laboratory. Your doctor will inform you about treatment, precautions and advices in the light of all findings.

Created at 11.10.2023 03:42
Updated at 28.10.2023 11:30


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