在消化道的内窥镜检查时,利用美兰或甲苯胺兰一类染料的染色效果观察粘膜的功能异常或病变,最近甚为盛行。可分染料撤布法及染色法。镜检下染色法系用0.5%美兰或0.5%甲苯胺兰,在内窥镜观察下,不加任何预备处置染色2～3分钟,用蒸馏水洗涤后即可观察。也可以口服染料染色,系用胶囊装100～150毫克美兰或 In the endoscopy of the digestive tract, the use of melanin or toluidine blue dye staining effect observed mucosal dysfunction or disease, recently very popular. Divided dye withdrawal method and dyeing method. Microscopy staining method with 0.5% Methimalan or 0.5% toluidine blue, under endoscopic observation, without any pre-treatment staining 2 to 3 minutes, washed with distilled water can be observed. Oral dye staining can also be used with capsules loaded 100 to 150 mg Meilan or