Through observing 18 patients who had difficulty in pulling out the ureters, we analyzed the reasons for pulling out ureters unsuccessfully which included gasbag's content being taken out difficultly, gasbag going back to contract badly, local mucous membrane being damaged or edema and emotional stress. 通过对18例留置尿管拔管困难患者的观察,分析拔管困难的原因有气囊内容物抽出障碍、气囊回缩不良、局部黏膜受损/水肿、情绪紧张4个方面。