gastroscopy

n. examination of the stomach by means of a gastroscope

In medicine (gastroenterology), esophagogastroduodenoscopy is a diagnostic endoscopic procedure that visualises the upper part of the gastrointestinal tract up to the duodenum. It is considered a minimally invasive procedure since it does not require an incision into one of the major body cavities and does not require any significant recovery after the procedure (unless sedation or anesthesia has been used). A sore throat is also common.
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Gastroscopy Looking into the stomach with a flexible viewing instrument called a gastroscope. Mentioned in: Duodenal Obstruction gastroscopy, n the [more]Gastroscopy - Community and Resources

Noun
1. visual examination of the stomach by means of a gastroscope inserted through the esophagus
(hypernym) endoscopy

(n.)
Examination of the abdomen or stomach, as with the gastroscope.