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胃内窥镜检查，是消化道疾病检查的重要手段。在检查中，有以下需要解决的问题：（1）镜体导管在插人食管时，对咽部有很大的刺激，易引起病人很强烈的恶心、呕吐及咽部疼痛；（2）消化道的蠕动造成消化液或反流的粘液形成大片团块状的泡沫，粘附在上消化道的内壁上，遮盖住病
Gastric endoscopy, is an important means of digestive disease examination. In the examination, there are the following problems to be solved: (1) the mirror body catheter inserted in the esophagus, the pharynx has a great stimulation, easy to cause the patient is very strong nausea, vomiting and pharyngeal pain; (2) digestion Peristalsis caused digestive juice or reflux of mucus to form a large block of foam, adhesion in the upper digestive tract on the inner wall, cover the disease