Gastroscopy is an effective and safe diagnostic method. Compared with oral endoscopy, nasogastric endoscopy is easier to perform, more accurate, and less uncomfortable.

Transnasal endoscopy is a technique that uses a flexible tube with a video camera attached from the nose to the stomach but not through the mouth. The purpose of the technique is to examine the upper part of the patient's digestive system, such as the esophagus, stomach, and duodenum (small intestine).

Nasal endoscopy is a diagnostic method that allows doctors to see the stomach directly through a camera, easily detecting diseases such as tumors, ulcers, foreign objects or mucosal vascular malformations, etc., in order to have the most effective treatment plan.