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清洁的肠道是行纤维结肠镜（肠镜）检查防止漏误诊、提高诊断阳性率的关键。肠镜前肠道准备的方法虽多,却均不尽理想,硫酸镁口服灌肠法是国内最常用的方法,但口味差,患者易出现呕吐。1993年磷酸钠口服灌肠液开始在澳洲应用于肠镜前的准备,其清肠的效果确切、口味好。为了了解此药肠道准备的效果,我们采用前瞻性研究,将其与硫酸镁肠道准备效果进行对比。 一、材料和方法 1.一般资料:2000年8月～9月,将我院行肠镜检查的成人患者,随机（单双号法）分为两组,每组50例:检查前分别口服硫酸镁灌肠液（硫酸镁组）和磷酸钠灌肠液（磷酸钠组）。两组患者年龄、性别、既往肠道手术史之间均无显著差异（P>0.05）。
Clean intestine is the line of fiber colonoscopy (colonoscopy) check to prevent misdiagnosis, improve the diagnostic positive rate of the key. Although there are many ways to prepare the intestine before colonoscopy, it is not ideal. The oral administration of magnesium sulfate is the most commonly used method in China, but the taste is poor and the patient is prone to vomiting. 1993 sodium phosphate oral enema started in Australia before the colonoscopy preparation, the bowel effect of the exact taste good. To understand the effect of this drug on bowel preparation, we used a prospective study to compare its efficacy with that of magnesium sulfate. I. Materials and Methods 1. General Information: From August to September 2000, adult patients with colonoscopy in our hospital were randomly divided into two groups (50 cases in each group): before oral administration Magnesium sulfate enema (magnesium sulfate group) and sodium phosphate enema (sodium phosphate group). There was no significant difference between the two groups in age, sex, past history of intestinal surgery (P> 0.05).