Gastroscopy, or panendoscopy, is an examination of the upper digestive tract. It is an endoscopic examination, which is performed by inserting a flexible tube with optics and a source of cold light through the throat, the esophagus into the stomach, without the need for surgical incisions. The examination allows the doctor to very carefully view and assess this section of the digestive tract. During the examination, the presence of Helicobacter pylori can be diagnosed, a fragment of the mucous membrane can be taken for further examination, and even bleeding ulcers can be treated, polyps can be removed, and early cancer can be treated. This is one of the best examinations in the diagnosis and treatment of diseases of the upper digestive tract. 

Colonoscopy is an endoscopic examination of the lower digestive tract, allowing the examination of the large intestine by inserting a flexible tube the thickness of the index finger, with a camera at the end, into the anus. The endoscope tube is inserted into the large intestine through the rectum. The examination is unpleasant and uncomfortable for the patient, but its diagnostic significance is very high. Colonoscopy allows for the detection and often immediate removal of changes that we do not know about because they do not yet cause any symptoms, such as polyps, benign adenomas that form on the inner walls of the intestine.

The endoscopic capsule is the most modern method that allows for non-invasive and safe diagnosis of the causes of gastrointestinal diseases, mainly of the small intestine. Diagnosis of the small intestine is difficult and unfortunately often impossible using gastroscopy or colonoscopy. Therefore, the test is considered unique and treated as an irreplaceable diagnostic method.

The procedure involves the patient swallowing a capsule, similar in size to a vitamin preparation. The PillCam capsule contains a miniature camera, which, moving by peristalsis, takes thousands of photos of the digestive tract, transmitting them to a receiver worn on the patient's belt during the examination. Electrodes are also glued to the patient's body at this time.

PEG (Percutaneous Endoscopic Gastrostomy), also known as percutaneous endoscopic gastrostomy , is a procedure that involves the introduction of an artificial access route into the stomach using an endoscope to provide enteral nutrition.