Methods: Twenty-one cases of small bowel diseases with negative findings of various routine diagnostic modalities were performed double-balloon enteroscopy from September to December, 2005.

• 方法。对2005年9月至12月，21例有消化道症状，但经胃镜、结肠镜、全消化道钡餐等检查为阴性者．进行双气囊小肠镜检查。