gastric lavage with a gastric tube

acidity anatomy biology cancer diagnosis diet digestion digestive disease doorman duodenum dyspepsia egd erosion esophagus gaster gastrectomy gastric gastritis gastroduodenitis gastroenterologist gastroenterology heartburn helicobacter human indigestion inflammation intestines lavage medical medicine mucous nasogastric patient physiology probes promoting pylori science sectional sphincter stomach structure system therapy tract treatment tube tubes ulcers