Healthy Stomach Scope. Air is put through the scope to make it easier for the doctor to see. A gastric tissue biopsy and culture are laboratory tests that examine stomach tissue.
After a panoramic view, the mucosa is inspected from a close distance. An upper gastrointestinal (gi) endoscopy is where the doctor uses an instrument called an endoscope to look at the inside lining of your oesophagus (food pipe), stomach and duodenum (first part of the small intestine). Air is put through the scope to make it easier for the doctor to see.