Gastroscopy (Upper Endoscopy)

A gastroscopy is an examination of the esophagus, stomach, and duodenum (the first part of the small intestine). Using a thin, flexible tube equipped with a camera and light source, we can examine these areas in detail. This allows us to detect inflammation, ulcers, polyps, or other abnormalities, some of which can be treated or removed immediately. We can also take tissue samples (biopsies) to identify food intolerances or bacteria in the stomach.

If you frequently experience heartburn, stomach pain, bloating, diarrhea, nausea, vomiting, difficulty swallowing, reflux, or even blood in the stool, a gastroscopy can help identify the cause. It is also recommended in cases of unintended weight loss.

To ensure clear visibility during the gastroscopy, your upper digestive tract should be as empty as possible. Don’t worry — we will explain everything to you in detail during a personal consultation. In general, the following rules apply:

• 6 hours before the examination: Please do not eat anything.
• Up to 2 hours before: Clear, fat-free liquids are allowed, such as water or tea. Please avoid milk.
• Medication: Only take medications after consulting your doctor.

You will receive a sedative through an intravenous line, and we will only begin once you are deeply asleep. The endoscope (a thin tube with a light) is then gently inserted through the mouth. If we notice any abnormalities, we can take small tissue samples (biopsies) directly and painlessly.

No, gastroscopy is not performed under general anesthesia. Instead, you will receive a sedative that makes the examination comfortable. Sedation is standard unless you explicitly request otherwise. We will discuss your wishes and medical requirements with you in detail beforehand.

You will receive all information about sedation and the procedure in an informed consent form, which must be signed no later than one day before the appointment. This ensures that you are well informed and prepared.

Generally not. If you feel uncomfortable at any point, we can administer pain-relieving medication. Our goal is for you to feel safe and well cared for.

No, a laxative is not required for a gastroscopy. Preparation mainly involves arriving for the examination on an empty stomach — meaning you should not eat or drink for several hours beforehand.

A laxative is only required for a colonoscopy, as the bowel must be thoroughly cleaned. If both examinations are performed together, you will receive clear preparation instructions to ensure everything runs smoothly. Further information can also be found under: “How do I prepare for a gastroscopy?”

Gastroscopy is a very safe procedure that is performed thousands of times every day. Complications are extremely rare, occurring in less than 0.2% of cases.

In rare instances, the following complications may occur:

• allergic reactions to medications
• minor dental damage if pre-existing dental issues are present
• bleeding or infections
• circulatory or breathing problems related to the sedative

Our experienced team closely monitors your safety and well-being throughout the examination. If you experience any symptoms after the procedure, we are always here for you and will do everything possible to support your recovery.

After the gastroscopy, it is important to allow yourself some rest. For your safety, please observe the following:

• For 12 hours, do not drive a car, motorcycle, bicycle, or e-scooter, and do not sign contracts, as you have received a sedative.
• If you feel unwell after the examination — for example, if you experience abdominal pain, nausea, or vomiting — please contact us. We are here for you if you have any questions or concerns. Your safety is our top priority.