目的探讨深插胃镜对十二指肠乳头以下病变的诊断价值。方法回顾性分析行胃镜检查[深插至十二指肠空肠曲(屈氏韧带附近)]的320例患者的临床资料、操作方法及检查结果。结果320例患者中,深插至十二指肠升部成功率为9312%,其中最多可以观察到十二指肠空肠以下8～10cm,所用时间约3～15min,发现十二指肠降部及以下病变85例。结论深插胃镜对十二指肠乳头以下部位病变具有较好的诊断及治疗价值。 Objective To investigate the diagnostic value of deep interferential endoscopy in the lesions below duodenal papilla. Methods We retrospectively analyzed the clinical data, operation methods and test results of 320 patients undergoing gastroscopy [deep insertion to the duodenum jejunum (near the ligaments of the knee)]. Results Among the 320 patients, the success rate of deepening to duodenal ascending was 9312%, of which up to 8 ~ 10cm below the duodenum and jejunum were observed, and the time used was about 3 ~ 15min, and the descending part of the duodenum was found And the following lesions in 85 cases. Conclusion Deep endoscopy has good diagnostic and therapeutic value for the lesions below the duodenal papilla.