临床隐性膀胱癌(癌前病变或原位癌)很难用常规膀胱镜检查发现,故需进行膀胱粘膜随机活检,但仍有遗漏病变的可能。作者对23例曾患过膀胱肿瘤,常规膀胱镜检查未发现粘膜异常的患者进行了染色膀胱镜检查。方法:常规膀胱镜检查后,插入F16尿管,注入0.1％的美兰盐水溶液,灌注压力低于20cm水柱,灌注量常低于300ml,最多不超过400ml。膀胱充盈后关闭尿管,5分钟后排空膀胱,用100ml生理盐水轻轻冲 Clinical recessive bladder cancer (precancerous lesions or carcinoma in situ) is difficult to find with conventional cystoscopy, it is necessary to carry out random biopsy of the bladder mucosa, but there is still the possibility of missing lesions. The authors performed cystoscopy on 23 patients who had had a tumor of the bladder and who did not find any mucosal abnormalities by conventional cystoscopy. Methods: After routine cystoscopy, insert F16 catheter, inject 0.1% melanin saline solution, perfusion pressure less than 20cm water column, perfusion volume often less than 300ml, up to not more than 400ml. Close the bladder after filling the bladder, emptying the bladder after 5 minutes, gently flush with 100ml saline