胃底体交界处的胃小弯和胃后壁向左前方凸起成嵴,初称之为胃底体间嵴。胃镜插入到贲门口下位区时必须调节角度钮向左向下,避开底体间嵴才能将胃镜顺利地插入胃体腔。胃镜退移到贲门下位区时由于胃底体间嵴的分隔必须调节角度钮向右向上才能插入胃底腔,检查贲门胃底部病变,防止漏诊。 Stomach at the junction of the gastric curvature of the stomach and stomach posterior wall protruding to the front of the ridge, initially known as the fundus of the human body between the crest. Gastroscopy inserted into the lower area of ​​the cardia when the angle must be adjusted to the left button down to avoid the bottom of the ridge between the gastroscope can be successfully inserted into the gastric cavity. Gastroscopy retreat to the cardia area due to the separation of the fundus between the body crest must be adjusted to the right button up to the bottom of the stomach to check the cardia gastric lesions at the bottom to prevent misdiagnosis.