Abstract
小肠远离口腔和肛门,且长度长(3.35～7.85 m),游离于腹膜内并被肠系膜束缚形成多发复合肠襻,是整个胃肠道中最难检测的部分.虽然小肠疾病可经X线钡餐、小肠镜、核素扫描及动脉造影等进行检查,但均存在着诊断阳性率低、定位及定性不准确、检查时患者痛苦大或属创伤性检查及伴有并发症等诸多缺点,从而使小肠疾病缺乏有效的诊断手段.
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