Gastroscopy can view the esophagus.
Typically a gastroscopy is performed using a thin tube with a high-definition camera that will look along the mouth, epiglottis, esophagus, stomach, and duodenum in order to look in detail at lesions in these areas. If necessary, a biopsy may be taken for pathologic examination to further clarify the diagnosis. Therefore, gastroscopy can examine the esophagus.
Generally patients should refrain from eating and drinking alcohol for 8 hours before gastroscopy. Gastroscopy will cause a strong nausea and vomiting reaction when it enters the stomach, which will easily cause reflux of gastric contents, resulting in tracheal obstruction, in addition to the food in the stomach will also affect the diagnosis.
If gastroscopy is needed, it is recommended to have it done by a professional doctor.