“obscure gastrointestinal bleeding”的概念、定义、翻译、参考文献-科学参考

单词	obscure gastrointestinal bleeding
释义	obscure gastrointestinal bleeding Encyclopedia 医学消化道出血释 obscure gastrointestinal bleeding不明原因消化道出血常规内镜检查（如胃镜和结肠镜检查）和小肠钡剂检查（如口服钡剂或钡剂灌肠造影）未能查明出血原因的反复或持续性消化道出血。
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