Gastroscopy is a medical examination of the upper part of gastrointestinal tract (esophagus, stomach, duodenum) with use of an endoscope. The endoscope is a flexible, optoelectronic device equipped with a micro camera which transmits images to a monitor.
The endoscope is inserted into the gastrointestinal tract through the mouth. Adequate channels in endoscope enable to suck off any liquid restricting visibility, to blow the air into stomach (examination of stomach which is filled with air is easier), to rinse an ending of an endoscope.
An endoscope is equipped with an bioptic channel through which any instrument like forceps or loops can be inserted. Forceps are designed to collect samples, which are small fragments of mucous membrane of gastrointestinal tract purposed for examination under microscope. Collecting samples is painless and the mucous membrane regenerates quickly.
During gastroscopy, a rapid urease test for diagnosis of Helicobacter pylori can be performed. Helicobacter pylori can cause gastritis and peptic ulcer disease. A test consists in collecting a sample of the mucous membrane of stomach with use of forceps. The sample is being placed on a disc of blotting paper moistened with a yellow dye, which change its colour into the carmine in case of contact with bacteria.