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[目的]探讨下消化道出血的常见病因。[方法]对2000年1月~2005年6月经电子结肠镜检查的320例下消化道出血患者进行回顾性分析。[结果]其主要病因依次为大肠癌62例、大肠息肉55例、溃疡性结肠炎46例、痔疮42例、结肠炎(未明确原因)37例等。[结论]大肠癌、大肠息肉及溃疡性结肠炎是下消化道出血最常见的三大病因,结肠镜检查是下消化道出血有效而安全的诊断方法。
[Objective] To investigate the common causes of lower gastrointestinal bleeding. [Methods] A retrospective analysis of 320 cases of lower gastrointestinal bleeding by electronic colonoscopy from January 2000 to June 2005 was performed. [Results] The main causes were colorectal cancer in 62 cases, colorectal polyps in 55 cases, ulcerative colitis in 46 cases, hemorrhoids in 42 cases, colitis (no definite cause) in 37 cases. [Conclusion] Colorectal cancer, colorectal polyps and ulcerative colitis are the three most common causes of lower gastrointestinal bleeding. Colonoscopy is an effective and safe diagnostic method for lower gastrointestinal bleeding.