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一、化学便匿血反应的限度近年来,大肠癌显著增加,为了早期发现,目前正在利用普查方法。众所周知,胃癌由于采用了胃X线及内窥镜的筛选法,使早期置癌的比例急剧增加。然而由于大肠这个脏器特殊,用钡灌肠X线检查法作为筛选手段并不适宜,因此而考虑大样本普查时最好是采用便匿血反应作为筛选方法。实际上,所发现的大肠癌占受检者的0.1％左右。可是,以往的化学法
First, the limits of chemical reactions to occult blood In recent years, colorectal cancer has increased significantly. For early detection, census methods are currently being used. As we all know, gastric cancer uses a gastric X-ray and endoscopic screening method, so that the proportion of early cancer increases dramatically. However, due to the special organ of the large intestine, it is not appropriate to use the barium enema X-ray examination as a screening method. Therefore, it is best to use a blinding blood reaction as a screening method when considering a large sample survey. In fact, the colorectal cancer found accounts for about 0.1% of the subjects. However, the previous chemical method